Mercurial > hg > nginx
view src/event/ngx_event_openssl.c @ 7092:2e8de3d81783
SSL: fixed possible use-after-free in $ssl_server_name.
The $ssl_server_name variable used SSL_get_servername() result directly,
but this is not safe: it references a memory allocation in an SSL
session, and this memory might be freed at any time due to renegotiation.
Instead, copy the name to memory allocated from the pool.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 22 Aug 2017 17:36:12 +0300 |
| parents | 82f0b8dcca27 |
| children | 3482c069e050 6c52c99c475e |
line wrap: on
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #define NGX_SSL_PASSWORD_BUFFER_SIZE 4096 typedef struct { ngx_uint_t engine; /* unsigned engine:1; */ } ngx_openssl_conf_t; static int ngx_ssl_password_callback(char *buf, int size, int rwflag, void *userdata); static int ngx_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store); static void ngx_ssl_info_callback(const ngx_ssl_conn_t *ssl_conn, int where, int ret); static void ngx_ssl_passwords_cleanup(void *data); static void ngx_ssl_handshake_handler(ngx_event_t *ev); static ngx_int_t ngx_ssl_handle_recv(ngx_connection_t *c, int n); static void ngx_ssl_write_handler(ngx_event_t *wev); static void ngx_ssl_read_handler(ngx_event_t *rev); static void ngx_ssl_shutdown_handler(ngx_event_t *ev); static void ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err, char *text); static void ngx_ssl_clear_error(ngx_log_t *log); static ngx_int_t ngx_ssl_session_id_context(ngx_ssl_t *ssl, ngx_str_t *sess_ctx); ngx_int_t ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data); static int ngx_ssl_new_session(ngx_ssl_conn_t *ssl_conn, ngx_ssl_session_t *sess); static ngx_ssl_session_t *ngx_ssl_get_cached_session(ngx_ssl_conn_t *ssl_conn, #if OPENSSL_VERSION_NUMBER >= 0x10100003L const #endif u_char *id, int len, int *copy); static void ngx_ssl_remove_session(SSL_CTX *ssl, ngx_ssl_session_t *sess); static void ngx_ssl_expire_sessions(ngx_ssl_session_cache_t *cache, ngx_slab_pool_t *shpool, ngx_uint_t n); static void ngx_ssl_session_rbtree_insert_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); #ifdef SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB static int ngx_ssl_session_ticket_key_callback(ngx_ssl_conn_t *ssl_conn, unsigned char *name, unsigned char *iv, EVP_CIPHER_CTX *ectx, HMAC_CTX *hctx, int enc); #endif #ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT static ngx_int_t ngx_ssl_check_name(ngx_str_t *name, ASN1_STRING *str); #endif static time_t ngx_ssl_parse_time( #if OPENSSL_VERSION_NUMBER > 0x10100000L const #endif ASN1_TIME *asn1time); static void *ngx_openssl_create_conf(ngx_cycle_t *cycle); static char *ngx_openssl_engine(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void ngx_openssl_exit(ngx_cycle_t *cycle); static ngx_command_t ngx_openssl_commands[] = { { ngx_string("ssl_engine"), NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1, ngx_openssl_engine, 0, 0, NULL }, ngx_null_command }; static ngx_core_module_t ngx_openssl_module_ctx = { ngx_string("openssl"), ngx_openssl_create_conf, NULL }; ngx_module_t ngx_openssl_module = { NGX_MODULE_V1, &ngx_openssl_module_ctx, /* module context */ ngx_openssl_commands, /* module directives */ NGX_CORE_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ ngx_openssl_exit, /* exit master */ NGX_MODULE_V1_PADDING }; int ngx_ssl_connection_index; int ngx_ssl_server_conf_index; int ngx_ssl_session_cache_index; int ngx_ssl_session_ticket_keys_index; int ngx_ssl_certificate_index; int ngx_ssl_next_certificate_index; int ngx_ssl_certificate_name_index; int ngx_ssl_stapling_index; ngx_int_t ngx_ssl_init(ngx_log_t *log) { #if OPENSSL_VERSION_NUMBER >= 0x10100003L if (OPENSSL_init_ssl(OPENSSL_INIT_LOAD_CONFIG, NULL) == 0) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "OPENSSL_init_ssl() failed"); return NGX_ERROR; } /* * OPENSSL_init_ssl() may leave errors in the error queue * while returning success */ ERR_clear_error(); #else OPENSSL_config(NULL); SSL_library_init(); SSL_load_error_strings(); OpenSSL_add_all_algorithms(); #endif #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef SSL_OP_NO_COMPRESSION { /* * Disable gzip compression in OpenSSL prior to 1.0.0 version, * this saves about 522K per connection. */ int n; STACK_OF(SSL_COMP) *ssl_comp_methods; ssl_comp_methods = SSL_COMP_get_compression_methods(); n = sk_SSL_COMP_num(ssl_comp_methods); while (n--) { (void) sk_SSL_COMP_pop(ssl_comp_methods); } } #endif #endif ngx_ssl_connection_index = SSL_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_connection_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_server_conf_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_server_conf_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_CTX_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_session_cache_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_session_cache_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_CTX_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_session_ticket_keys_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_session_ticket_keys_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_CTX_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_certificate_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_certificate_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "SSL_CTX_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_next_certificate_index = X509_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_next_certificate_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_certificate_name_index = X509_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_certificate_name_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed"); return NGX_ERROR; } ngx_ssl_stapling_index = X509_get_ex_new_index(0, NULL, NULL, NULL, NULL); if (ngx_ssl_stapling_index == -1) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "X509_get_ex_new_index() failed"); return NGX_ERROR; } return NGX_OK; } ngx_int_t ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_t protocols, void *data) { ssl->ctx = SSL_CTX_new(SSLv23_method()); if (ssl->ctx == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_new() failed"); return NGX_ERROR; } if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_server_conf_index, data) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_ex_data() failed"); return NGX_ERROR; } if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_certificate_index, NULL) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_ex_data() failed"); return NGX_ERROR; } ssl->buffer_size = NGX_SSL_BUFSIZE; /* client side options */ #ifdef SSL_OP_MICROSOFT_SESS_ID_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_SESS_ID_BUG); #endif #ifdef SSL_OP_NETSCAPE_CHALLENGE_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_NETSCAPE_CHALLENGE_BUG); #endif /* server side options */ #ifdef SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG); #endif #ifdef SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER); #endif #ifdef SSL_OP_MSIE_SSLV2_RSA_PADDING /* this option allow a potential SSL 2.0 rollback (CAN-2005-2969) */ SSL_CTX_set_options(ssl->ctx, SSL_OP_MSIE_SSLV2_RSA_PADDING); #endif #ifdef SSL_OP_SSLEAY_080_CLIENT_DH_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLEAY_080_CLIENT_DH_BUG); #endif #ifdef SSL_OP_TLS_D5_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_D5_BUG); #endif #ifdef SSL_OP_TLS_BLOCK_PADDING_BUG SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_BLOCK_PADDING_BUG); #endif #ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS SSL_CTX_set_options(ssl->ctx, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); #endif SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_DH_USE); #ifdef SSL_CTRL_CLEAR_OPTIONS /* only in 0.9.8m+ */ SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1); #endif if (!(protocols & NGX_SSL_SSLv2)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_SSLv2); } if (!(protocols & NGX_SSL_SSLv3)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_SSLv3); } if (!(protocols & NGX_SSL_TLSv1)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1); } #ifdef SSL_OP_NO_TLSv1_1 SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_1); if (!(protocols & NGX_SSL_TLSv1_1)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_1); } #endif #ifdef SSL_OP_NO_TLSv1_2 SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_2); if (!(protocols & NGX_SSL_TLSv1_2)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_2); } #endif #ifdef SSL_OP_NO_TLSv1_3 SSL_CTX_clear_options(ssl->ctx, SSL_OP_NO_TLSv1_3); if (!(protocols & NGX_SSL_TLSv1_3)) { SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_3); } #endif #ifdef SSL_OP_NO_COMPRESSION SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_COMPRESSION); #endif #ifdef SSL_MODE_RELEASE_BUFFERS SSL_CTX_set_mode(ssl->ctx, SSL_MODE_RELEASE_BUFFERS); #endif #ifdef SSL_MODE_NO_AUTO_CHAIN SSL_CTX_set_mode(ssl->ctx, SSL_MODE_NO_AUTO_CHAIN); #endif SSL_CTX_set_read_ahead(ssl->ctx, 1); SSL_CTX_set_info_callback(ssl->ctx, ngx_ssl_info_callback); return NGX_OK; } ngx_int_t ngx_ssl_certificates(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *certs, ngx_array_t *keys, ngx_array_t *passwords) { ngx_str_t *cert, *key; ngx_uint_t i; cert = certs->elts; key = keys->elts; for (i = 0; i < certs->nelts; i++) { if (ngx_ssl_certificate(cf, ssl, &cert[i], &key[i], passwords) != NGX_OK) { return NGX_ERROR; } } return NGX_OK; } ngx_int_t ngx_ssl_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_str_t *key, ngx_array_t *passwords) { BIO *bio; X509 *x509; u_long n; ngx_str_t *pwd; ngx_uint_t tries; if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) { return NGX_ERROR; } /* * we can't use SSL_CTX_use_certificate_chain_file() as it doesn't * allow to access certificate later from SSL_CTX, so we reimplement * it here */ bio = BIO_new_file((char *) cert->data, "r"); if (bio == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "BIO_new_file(\"%s\") failed", cert->data); return NGX_ERROR; } x509 = PEM_read_bio_X509_AUX(bio, NULL, NULL, NULL); if (x509 == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "PEM_read_bio_X509_AUX(\"%s\") failed", cert->data); BIO_free(bio); return NGX_ERROR; } if (SSL_CTX_use_certificate(ssl->ctx, x509) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_use_certificate(\"%s\") failed", cert->data); X509_free(x509); BIO_free(bio); return NGX_ERROR; } if (X509_set_ex_data(x509, ngx_ssl_certificate_name_index, cert->data) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_set_ex_data() failed"); X509_free(x509); BIO_free(bio); return NGX_ERROR; } if (X509_set_ex_data(x509, ngx_ssl_next_certificate_index, SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index)) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_set_ex_data() failed"); X509_free(x509); BIO_free(bio); return NGX_ERROR; } if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_certificate_index, x509) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_ex_data() failed"); X509_free(x509); BIO_free(bio); return NGX_ERROR; } /* read rest of the chain */ for ( ;; ) { x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); if (x509 == NULL) { n = ERR_peek_last_error(); if (ERR_GET_LIB(n) == ERR_LIB_PEM && ERR_GET_REASON(n) == PEM_R_NO_START_LINE) { /* end of file */ ERR_clear_error(); break; } /* some real error */ ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "PEM_read_bio_X509(\"%s\") failed", cert->data); BIO_free(bio); return NGX_ERROR; } #ifdef SSL_CTRL_CHAIN_CERT /* * SSL_CTX_add0_chain_cert() is needed to add chain to * a particular certificate when multiple certificates are used; * only available in OpenSSL 1.0.2+ */ if (SSL_CTX_add0_chain_cert(ssl->ctx, x509) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_add0_chain_cert(\"%s\") failed", cert->data); X509_free(x509); BIO_free(bio); return NGX_ERROR; } #else if (SSL_CTX_add_extra_chain_cert(ssl->ctx, x509) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_add_extra_chain_cert(\"%s\") failed", cert->data); X509_free(x509); BIO_free(bio); return NGX_ERROR; } #endif } BIO_free(bio); if (ngx_strncmp(key->data, "engine:", sizeof("engine:") - 1) == 0) { #ifndef OPENSSL_NO_ENGINE u_char *p, *last; ENGINE *engine; EVP_PKEY *pkey; p = key->data + sizeof("engine:") - 1; last = (u_char *) ngx_strchr(p, ':'); if (last == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid syntax in \"%V\"", key); return NGX_ERROR; } *last = '\0'; engine = ENGINE_by_id((char *) p); if (engine == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "ENGINE_by_id(\"%s\") failed", p); return NGX_ERROR; } *last++ = ':'; pkey = ENGINE_load_private_key(engine, (char *) last, 0, 0); if (pkey == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "ENGINE_load_private_key(\"%s\") failed", last); ENGINE_free(engine); return NGX_ERROR; } ENGINE_free(engine); if (SSL_CTX_use_PrivateKey(ssl->ctx, pkey) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_use_PrivateKey(\"%s\") failed", last); EVP_PKEY_free(pkey); return NGX_ERROR; } EVP_PKEY_free(pkey); return NGX_OK; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "loading \"engine:...\" certificate keys " "is not supported"); return NGX_ERROR; #endif } if (ngx_conf_full_name(cf->cycle, key, 1) != NGX_OK) { return NGX_ERROR; } if (passwords) { tries = passwords->nelts; pwd = passwords->elts; SSL_CTX_set_default_passwd_cb(ssl->ctx, ngx_ssl_password_callback); SSL_CTX_set_default_passwd_cb_userdata(ssl->ctx, pwd); } else { tries = 1; #if (NGX_SUPPRESS_WARN) pwd = NULL; #endif } for ( ;; ) { if (SSL_CTX_use_PrivateKey_file(ssl->ctx, (char *) key->data, SSL_FILETYPE_PEM) != 0) { break; } if (--tries) { ERR_clear_error(); SSL_CTX_set_default_passwd_cb_userdata(ssl->ctx, ++pwd); continue; } ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_use_PrivateKey_file(\"%s\") failed", key->data); return NGX_ERROR; } SSL_CTX_set_default_passwd_cb(ssl->ctx, NULL); return NGX_OK; } static int ngx_ssl_password_callback(char *buf, int size, int rwflag, void *userdata) { ngx_str_t *pwd = userdata; if (rwflag) { ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, "ngx_ssl_password_callback() is called for encryption"); return 0; } if (pwd->len > (size_t) size) { ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "password is truncated to %d bytes", size); } else { size = pwd->len; } ngx_memcpy(buf, pwd->data, size); return size; } ngx_int_t ngx_ssl_ciphers(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *ciphers, ngx_uint_t prefer_server_ciphers) { if (SSL_CTX_set_cipher_list(ssl->ctx, (char *) ciphers->data) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_cipher_list(\"%V\") failed", ciphers); return NGX_ERROR; } if (prefer_server_ciphers) { SSL_CTX_set_options(ssl->ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); } #if (OPENSSL_VERSION_NUMBER < 0x10100001L && !defined LIBRESSL_VERSION_NUMBER) /* a temporary 512-bit RSA key is required for export versions of MSIE */ SSL_CTX_set_tmp_rsa_callback(ssl->ctx, ngx_ssl_rsa512_key_callback); #endif return NGX_OK; } ngx_int_t ngx_ssl_client_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth) { STACK_OF(X509_NAME) *list; SSL_CTX_set_verify(ssl->ctx, SSL_VERIFY_PEER, ngx_ssl_verify_callback); SSL_CTX_set_verify_depth(ssl->ctx, depth); if (cert->len == 0) { return NGX_OK; } if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) { return NGX_ERROR; } if (SSL_CTX_load_verify_locations(ssl->ctx, (char *) cert->data, NULL) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_load_verify_locations(\"%s\") failed", cert->data); return NGX_ERROR; } /* * SSL_CTX_load_verify_locations() may leave errors in the error queue * while returning success */ ERR_clear_error(); list = SSL_load_client_CA_file((char *) cert->data); if (list == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_load_client_CA_file(\"%s\") failed", cert->data); return NGX_ERROR; } /* * before 0.9.7h and 0.9.8 SSL_load_client_CA_file() * always leaved an error in the error queue */ ERR_clear_error(); SSL_CTX_set_client_CA_list(ssl->ctx, list); return NGX_OK; } ngx_int_t ngx_ssl_trusted_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, ngx_int_t depth) { SSL_CTX_set_verify_depth(ssl->ctx, depth); if (cert->len == 0) { return NGX_OK; } if (ngx_conf_full_name(cf->cycle, cert, 1) != NGX_OK) { return NGX_ERROR; } if (SSL_CTX_load_verify_locations(ssl->ctx, (char *) cert->data, NULL) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_load_verify_locations(\"%s\") failed", cert->data); return NGX_ERROR; } /* * SSL_CTX_load_verify_locations() may leave errors in the error queue * while returning success */ ERR_clear_error(); return NGX_OK; } ngx_int_t ngx_ssl_crl(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *crl) { X509_STORE *store; X509_LOOKUP *lookup; if (crl->len == 0) { return NGX_OK; } if (ngx_conf_full_name(cf->cycle, crl, 1) != NGX_OK) { return NGX_ERROR; } store = SSL_CTX_get_cert_store(ssl->ctx); if (store == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_get_cert_store() failed"); return NGX_ERROR; } lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file()); if (lookup == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_STORE_add_lookup() failed"); return NGX_ERROR; } if (X509_LOOKUP_load_file(lookup, (char *) crl->data, X509_FILETYPE_PEM) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_LOOKUP_load_file(\"%s\") failed", crl->data); return NGX_ERROR; } X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL); return NGX_OK; } static int ngx_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store) { #if (NGX_DEBUG) char *subject, *issuer; int err, depth; X509 *cert; X509_NAME *sname, *iname; ngx_connection_t *c; ngx_ssl_conn_t *ssl_conn; ssl_conn = X509_STORE_CTX_get_ex_data(x509_store, SSL_get_ex_data_X509_STORE_CTX_idx()); c = ngx_ssl_get_connection(ssl_conn); cert = X509_STORE_CTX_get_current_cert(x509_store); err = X509_STORE_CTX_get_error(x509_store); depth = X509_STORE_CTX_get_error_depth(x509_store); sname = X509_get_subject_name(cert); subject = sname ? X509_NAME_oneline(sname, NULL, 0) : "(none)"; iname = X509_get_issuer_name(cert); issuer = iname ? X509_NAME_oneline(iname, NULL, 0) : "(none)"; ngx_log_debug5(NGX_LOG_DEBUG_EVENT, c->log, 0, "verify:%d, error:%d, depth:%d, " "subject:\"%s\", issuer:\"%s\"", ok, err, depth, subject, issuer); if (sname) { OPENSSL_free(subject); } if (iname) { OPENSSL_free(issuer); } #endif return 1; } static void ngx_ssl_info_callback(const ngx_ssl_conn_t *ssl_conn, int where, int ret) { BIO *rbio, *wbio; ngx_connection_t *c; if ((where & SSL_CB_HANDSHAKE_START) && SSL_is_server((ngx_ssl_conn_t *) ssl_conn)) { c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn); if (c->ssl->handshaked) { c->ssl->renegotiation = 1; ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL renegotiation"); } } if ((where & SSL_CB_ACCEPT_LOOP) == SSL_CB_ACCEPT_LOOP) { c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn); if (!c->ssl->handshake_buffer_set) { /* * By default OpenSSL uses 4k buffer during a handshake, * which is too low for long certificate chains and might * result in extra round-trips. * * To adjust a buffer size we detect that buffering was added * to write side of the connection by comparing rbio and wbio. * If they are different, we assume that it's due to buffering * added to wbio, and set buffer size. */ rbio = SSL_get_rbio((ngx_ssl_conn_t *) ssl_conn); wbio = SSL_get_wbio((ngx_ssl_conn_t *) ssl_conn); if (rbio != wbio) { (void) BIO_set_write_buffer_size(wbio, NGX_SSL_BUFSIZE); c->ssl->handshake_buffer_set = 1; } } } } RSA * ngx_ssl_rsa512_key_callback(ngx_ssl_conn_t *ssl_conn, int is_export, int key_length) { static RSA *key; if (key_length != 512) { return NULL; } #if (OPENSSL_VERSION_NUMBER < 0x10100003L && !defined OPENSSL_NO_DEPRECATED) if (key == NULL) { key = RSA_generate_key(512, RSA_F4, NULL, NULL); } #endif return key; } ngx_array_t * ngx_ssl_read_password_file(ngx_conf_t *cf, ngx_str_t *file) { u_char *p, *last, *end; size_t len; ssize_t n; ngx_fd_t fd; ngx_str_t *pwd; ngx_array_t *passwords; ngx_pool_cleanup_t *cln; u_char buf[NGX_SSL_PASSWORD_BUFFER_SIZE]; if (ngx_conf_full_name(cf->cycle, file, 1) != NGX_OK) { return NULL; } cln = ngx_pool_cleanup_add(cf->temp_pool, 0); passwords = ngx_array_create(cf->temp_pool, 4, sizeof(ngx_str_t)); if (cln == NULL || passwords == NULL) { return NULL; } cln->handler = ngx_ssl_passwords_cleanup; cln->data = passwords; fd = ngx_open_file(file->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); if (fd == NGX_INVALID_FILE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, ngx_open_file_n " \"%s\" failed", file->data); return NULL; } len = 0; last = buf; do { n = ngx_read_fd(fd, last, NGX_SSL_PASSWORD_BUFFER_SIZE - len); if (n == -1) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, ngx_read_fd_n " \"%s\" failed", file->data); passwords = NULL; goto cleanup; } end = last + n; if (len && n == 0) { *end++ = LF; } p = buf; for ( ;; ) { last = ngx_strlchr(last, end, LF); if (last == NULL) { break; } len = last++ - p; if (len && p[len - 1] == CR) { len--; } if (len) { pwd = ngx_array_push(passwords); if (pwd == NULL) { passwords = NULL; goto cleanup; } pwd->len = len; pwd->data = ngx_pnalloc(cf->temp_pool, len); if (pwd->data == NULL) { passwords->nelts--; passwords = NULL; goto cleanup; } ngx_memcpy(pwd->data, p, len); } p = last; } len = end - p; if (len == NGX_SSL_PASSWORD_BUFFER_SIZE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "too long line in \"%s\"", file->data); passwords = NULL; goto cleanup; } ngx_memmove(buf, p, len); last = buf + len; } while (n != 0); if (passwords->nelts == 0) { pwd = ngx_array_push(passwords); if (pwd == NULL) { passwords = NULL; goto cleanup; } ngx_memzero(pwd, sizeof(ngx_str_t)); } cleanup: if (ngx_close_file(fd) == NGX_FILE_ERROR) { ngx_conf_log_error(NGX_LOG_ALERT, cf, ngx_errno, ngx_close_file_n " \"%s\" failed", file->data); } ngx_memzero(buf, NGX_SSL_PASSWORD_BUFFER_SIZE); return passwords; } static void ngx_ssl_passwords_cleanup(void *data) { ngx_array_t *passwords = data; ngx_str_t *pwd; ngx_uint_t i; pwd = passwords->elts; for (i = 0; i < passwords->nelts; i++) { ngx_memzero(pwd[i].data, pwd[i].len); } } ngx_int_t ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file) { DH *dh; BIO *bio; if (file->len == 0) { return NGX_OK; } if (ngx_conf_full_name(cf->cycle, file, 1) != NGX_OK) { return NGX_ERROR; } bio = BIO_new_file((char *) file->data, "r"); if (bio == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "BIO_new_file(\"%s\") failed", file->data); return NGX_ERROR; } dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); if (dh == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "PEM_read_bio_DHparams(\"%s\") failed", file->data); BIO_free(bio); return NGX_ERROR; } SSL_CTX_set_tmp_dh(ssl->ctx, dh); DH_free(dh); BIO_free(bio); return NGX_OK; } ngx_int_t ngx_ssl_ecdh_curve(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *name) { #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH /* * Elliptic-Curve Diffie-Hellman parameters are either "named curves" * from RFC 4492 section 5.1.1, or explicitly described curves over * binary fields. OpenSSL only supports the "named curves", which provide * maximum interoperability. */ #if (defined SSL_CTX_set1_curves_list || defined SSL_CTRL_SET_CURVES_LIST) /* * OpenSSL 1.0.2+ allows configuring a curve list instead of a single * curve previously supported. By default an internal list is used, * with prime256v1 being preferred by server in OpenSSL 1.0.2b+ * and X25519 in OpenSSL 1.1.0+. * * By default a curve preferred by the client will be used for * key exchange. The SSL_OP_CIPHER_SERVER_PREFERENCE option can * be used to prefer server curves instead, similar to what it * does for ciphers. */ SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_ECDH_USE); #if SSL_CTRL_SET_ECDH_AUTO /* not needed in OpenSSL 1.1.0+ */ SSL_CTX_set_ecdh_auto(ssl->ctx, 1); #endif if (ngx_strcmp(name->data, "auto") == 0) { return NGX_OK; } if (SSL_CTX_set1_curves_list(ssl->ctx, (char *) name->data) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set1_curves_list(\"%s\") failed", name->data); return NGX_ERROR; } #else int nid; char *curve; EC_KEY *ecdh; if (ngx_strcmp(name->data, "auto") == 0) { curve = "prime256v1"; } else { curve = (char *) name->data; } nid = OBJ_sn2nid(curve); if (nid == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "OBJ_sn2nid(\"%s\") failed: unknown curve", curve); return NGX_ERROR; } ecdh = EC_KEY_new_by_curve_name(nid); if (ecdh == NULL) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EC_KEY_new_by_curve_name(\"%s\") failed", curve); return NGX_ERROR; } SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_ECDH_USE); SSL_CTX_set_tmp_ecdh(ssl->ctx, ecdh); EC_KEY_free(ecdh); #endif #endif #endif return NGX_OK; } ngx_int_t ngx_ssl_create_connection(ngx_ssl_t *ssl, ngx_connection_t *c, ngx_uint_t flags) { ngx_ssl_connection_t *sc; sc = ngx_pcalloc(c->pool, sizeof(ngx_ssl_connection_t)); if (sc == NULL) { return NGX_ERROR; } sc->buffer = ((flags & NGX_SSL_BUFFER) != 0); sc->buffer_size = ssl->buffer_size; sc->session_ctx = ssl->ctx; sc->connection = SSL_new(ssl->ctx); if (sc->connection == NULL) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_new() failed"); return NGX_ERROR; } if (SSL_set_fd(sc->connection, c->fd) == 0) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_fd() failed"); return NGX_ERROR; } if (flags & NGX_SSL_CLIENT) { SSL_set_connect_state(sc->connection); } else { SSL_set_accept_state(sc->connection); } if (SSL_set_ex_data(sc->connection, ngx_ssl_connection_index, c) == 0) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_ex_data() failed"); return NGX_ERROR; } c->ssl = sc; return NGX_OK; } ngx_int_t ngx_ssl_set_session(ngx_connection_t *c, ngx_ssl_session_t *session) { if (session) { if (SSL_set_session(c->ssl->connection, session) == 0) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "SSL_set_session() failed"); return NGX_ERROR; } } return NGX_OK; } ngx_int_t ngx_ssl_handshake(ngx_connection_t *c) { int n, sslerr; ngx_err_t err; ngx_ssl_clear_error(c->log); n = SSL_do_handshake(c->ssl->connection); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_do_handshake: %d", n); if (n == 1) { if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } #if (NGX_DEBUG) { char buf[129], *s, *d; #if OPENSSL_VERSION_NUMBER >= 0x10000000L const #endif SSL_CIPHER *cipher; cipher = SSL_get_current_cipher(c->ssl->connection); if (cipher) { SSL_CIPHER_description(cipher, &buf[1], 128); for (s = &buf[1], d = buf; *s; s++) { if (*s == ' ' && *d == ' ') { continue; } if (*s == LF || *s == CR) { continue; } *++d = *s; } if (*d != ' ') { d++; } *d = '\0'; ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL: %s, cipher: \"%s\"", SSL_get_version(c->ssl->connection), &buf[1]); if (SSL_session_reused(c->ssl->connection)) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL reused session"); } } else { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL no shared ciphers"); } } #endif c->ssl->handshaked = 1; c->recv = ngx_ssl_recv; c->send = ngx_ssl_write; c->recv_chain = ngx_ssl_recv_chain; c->send_chain = ngx_ssl_send_chain; #if OPENSSL_VERSION_NUMBER < 0x10100000L #ifdef SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS /* initial handshake done, disable renegotiation (CVE-2009-3555) */ if (c->ssl->connection->s3 && SSL_is_server(c->ssl->connection)) { c->ssl->connection->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS; } #endif #endif return NGX_OK; } sslerr = SSL_get_error(c->ssl->connection, n); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr); if (sslerr == SSL_ERROR_WANT_READ) { c->read->ready = 0; c->read->handler = ngx_ssl_handshake_handler; c->write->handler = ngx_ssl_handshake_handler; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } return NGX_AGAIN; } if (sslerr == SSL_ERROR_WANT_WRITE) { c->write->ready = 0; c->read->handler = ngx_ssl_handshake_handler; c->write->handler = ngx_ssl_handshake_handler; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } return NGX_AGAIN; } err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0; c->ssl->no_wait_shutdown = 1; c->ssl->no_send_shutdown = 1; c->read->eof = 1; if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) { ngx_connection_error(c, err, "peer closed connection in SSL handshake"); return NGX_ERROR; } c->read->error = 1; ngx_ssl_connection_error(c, sslerr, err, "SSL_do_handshake() failed"); return NGX_ERROR; } static void ngx_ssl_handshake_handler(ngx_event_t *ev) { ngx_connection_t *c; c = ev->data; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL handshake handler: %d", ev->write); if (ev->timedout) { c->ssl->handler(c); return; } if (ngx_ssl_handshake(c) == NGX_AGAIN) { return; } c->ssl->handler(c); } ssize_t ngx_ssl_recv_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t limit) { u_char *last; ssize_t n, bytes, size; ngx_buf_t *b; bytes = 0; b = cl->buf; last = b->last; for ( ;; ) { size = b->end - last; if (limit) { if (bytes >= limit) { return bytes; } if (bytes + size > limit) { size = (ssize_t) (limit - bytes); } } n = ngx_ssl_recv(c, last, size); if (n > 0) { last += n; bytes += n; if (last == b->end) { cl = cl->next; if (cl == NULL) { return bytes; } b = cl->buf; last = b->last; } continue; } if (bytes) { if (n == 0 || n == NGX_ERROR) { c->read->ready = 1; } return bytes; } return n; } } ssize_t ngx_ssl_recv(ngx_connection_t *c, u_char *buf, size_t size) { int n, bytes; if (c->ssl->last == NGX_ERROR) { c->read->error = 1; return NGX_ERROR; } if (c->ssl->last == NGX_DONE) { c->read->ready = 0; c->read->eof = 1; return 0; } bytes = 0; ngx_ssl_clear_error(c->log); /* * SSL_read() may return data in parts, so try to read * until SSL_read() would return no data */ for ( ;; ) { n = SSL_read(c->ssl->connection, buf, size); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_read: %d", n); if (n > 0) { bytes += n; } c->ssl->last = ngx_ssl_handle_recv(c, n); if (c->ssl->last == NGX_OK) { size -= n; if (size == 0) { c->read->ready = 1; return bytes; } buf += n; continue; } if (bytes) { if (c->ssl->last != NGX_AGAIN) { c->read->ready = 1; } return bytes; } switch (c->ssl->last) { case NGX_DONE: c->read->ready = 0; c->read->eof = 1; return 0; case NGX_ERROR: c->read->error = 1; /* fall through */ case NGX_AGAIN: return c->ssl->last; } } } static ngx_int_t ngx_ssl_handle_recv(ngx_connection_t *c, int n) { int sslerr; ngx_err_t err; if (c->ssl->renegotiation) { /* * disable renegotiation (CVE-2009-3555): * OpenSSL (at least up to 0.9.8l) does not handle disabled * renegotiation gracefully, so drop connection here */ ngx_log_error(NGX_LOG_NOTICE, c->log, 0, "SSL renegotiation disabled"); while (ERR_peek_error()) { ngx_ssl_error(NGX_LOG_DEBUG, c->log, 0, "ignoring stale global SSL error"); } ERR_clear_error(); c->ssl->no_wait_shutdown = 1; c->ssl->no_send_shutdown = 1; return NGX_ERROR; } if (n > 0) { if (c->ssl->saved_write_handler) { c->write->handler = c->ssl->saved_write_handler; c->ssl->saved_write_handler = NULL; c->write->ready = 1; if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } ngx_post_event(c->write, &ngx_posted_events); } return NGX_OK; } sslerr = SSL_get_error(c->ssl->connection, n); err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr); if (sslerr == SSL_ERROR_WANT_READ) { c->read->ready = 0; return NGX_AGAIN; } if (sslerr == SSL_ERROR_WANT_WRITE) { ngx_log_error(NGX_LOG_INFO, c->log, 0, "peer started SSL renegotiation"); c->write->ready = 0; if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } /* * we do not set the timer because there is already the read event timer */ if (c->ssl->saved_write_handler == NULL) { c->ssl->saved_write_handler = c->write->handler; c->write->handler = ngx_ssl_write_handler; } return NGX_AGAIN; } c->ssl->no_wait_shutdown = 1; c->ssl->no_send_shutdown = 1; if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "peer shutdown SSL cleanly"); return NGX_DONE; } ngx_ssl_connection_error(c, sslerr, err, "SSL_read() failed"); return NGX_ERROR; } static void ngx_ssl_write_handler(ngx_event_t *wev) { ngx_connection_t *c; c = wev->data; c->read->handler(c->read); } /* * OpenSSL has no SSL_writev() so we copy several bufs into our 16K buffer * before the SSL_write() call to decrease a SSL overhead. * * Besides for protocols such as HTTP it is possible to always buffer * the output to decrease a SSL overhead some more. */ ngx_chain_t * ngx_ssl_send_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) { int n; ngx_uint_t flush; ssize_t send, size; ngx_buf_t *buf; if (!c->ssl->buffer) { while (in) { if (ngx_buf_special(in->buf)) { in = in->next; continue; } n = ngx_ssl_write(c, in->buf->pos, in->buf->last - in->buf->pos); if (n == NGX_ERROR) { return NGX_CHAIN_ERROR; } if (n == NGX_AGAIN) { return in; } in->buf->pos += n; if (in->buf->pos == in->buf->last) { in = in->next; } } return in; } /* the maximum limit size is the maximum int32_t value - the page size */ if (limit == 0 || limit > (off_t) (NGX_MAX_INT32_VALUE - ngx_pagesize)) { limit = NGX_MAX_INT32_VALUE - ngx_pagesize; } buf = c->ssl->buf; if (buf == NULL) { buf = ngx_create_temp_buf(c->pool, c->ssl->buffer_size); if (buf == NULL) { return NGX_CHAIN_ERROR; } c->ssl->buf = buf; } if (buf->start == NULL) { buf->start = ngx_palloc(c->pool, c->ssl->buffer_size); if (buf->start == NULL) { return NGX_CHAIN_ERROR; } buf->pos = buf->start; buf->last = buf->start; buf->end = buf->start + c->ssl->buffer_size; } send = buf->last - buf->pos; flush = (in == NULL) ? 1 : buf->flush; for ( ;; ) { while (in && buf->last < buf->end && send < limit) { if (in->buf->last_buf || in->buf->flush) { flush = 1; } if (ngx_buf_special(in->buf)) { in = in->next; continue; } size = in->buf->last - in->buf->pos; if (size > buf->end - buf->last) { size = buf->end - buf->last; } if (send + size > limit) { size = (ssize_t) (limit - send); } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL buf copy: %z", size); ngx_memcpy(buf->last, in->buf->pos, size); buf->last += size; in->buf->pos += size; send += size; if (in->buf->pos == in->buf->last) { in = in->next; } } if (!flush && send < limit && buf->last < buf->end) { break; } size = buf->last - buf->pos; if (size == 0) { buf->flush = 0; c->buffered &= ~NGX_SSL_BUFFERED; return in; } n = ngx_ssl_write(c, buf->pos, size); if (n == NGX_ERROR) { return NGX_CHAIN_ERROR; } if (n == NGX_AGAIN) { break; } buf->pos += n; if (n < size) { break; } flush = 0; buf->pos = buf->start; buf->last = buf->start; if (in == NULL || send == limit) { break; } } buf->flush = flush; if (buf->pos < buf->last) { c->buffered |= NGX_SSL_BUFFERED; } else { c->buffered &= ~NGX_SSL_BUFFERED; } return in; } ssize_t ngx_ssl_write(ngx_connection_t *c, u_char *data, size_t size) { int n, sslerr; ngx_err_t err; ngx_ssl_clear_error(c->log); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL to write: %uz", size); n = SSL_write(c->ssl->connection, data, size); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_write: %d", n); if (n > 0) { if (c->ssl->saved_read_handler) { c->read->handler = c->ssl->saved_read_handler; c->ssl->saved_read_handler = NULL; c->read->ready = 1; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } ngx_post_event(c->read, &ngx_posted_events); } c->sent += n; return n; } sslerr = SSL_get_error(c->ssl->connection, n); err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr); if (sslerr == SSL_ERROR_WANT_WRITE) { c->write->ready = 0; return NGX_AGAIN; } if (sslerr == SSL_ERROR_WANT_READ) { ngx_log_error(NGX_LOG_INFO, c->log, 0, "peer started SSL renegotiation"); c->read->ready = 0; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } /* * we do not set the timer because there is already * the write event timer */ if (c->ssl->saved_read_handler == NULL) { c->ssl->saved_read_handler = c->read->handler; c->read->handler = ngx_ssl_read_handler; } return NGX_AGAIN; } c->ssl->no_wait_shutdown = 1; c->ssl->no_send_shutdown = 1; c->write->error = 1; ngx_ssl_connection_error(c, sslerr, err, "SSL_write() failed"); return NGX_ERROR; } static void ngx_ssl_read_handler(ngx_event_t *rev) { ngx_connection_t *c; c = rev->data; c->write->handler(c->write); } void ngx_ssl_free_buffer(ngx_connection_t *c) { if (c->ssl->buf && c->ssl->buf->start) { if (ngx_pfree(c->pool, c->ssl->buf->start) == NGX_OK) { c->ssl->buf->start = NULL; } } } ngx_int_t ngx_ssl_shutdown(ngx_connection_t *c) { int n, sslerr, mode; ngx_err_t err; if (SSL_in_init(c->ssl->connection)) { /* * OpenSSL 1.0.2f complains if SSL_shutdown() is called during * an SSL handshake, while previous versions always return 0. * Avoid calling SSL_shutdown() if handshake wasn't completed. */ SSL_free(c->ssl->connection); c->ssl = NULL; return NGX_OK; } if (c->timedout) { mode = SSL_RECEIVED_SHUTDOWN|SSL_SENT_SHUTDOWN; SSL_set_quiet_shutdown(c->ssl->connection, 1); } else { mode = SSL_get_shutdown(c->ssl->connection); if (c->ssl->no_wait_shutdown) { mode |= SSL_RECEIVED_SHUTDOWN; } if (c->ssl->no_send_shutdown) { mode |= SSL_SENT_SHUTDOWN; } if (c->ssl->no_wait_shutdown && c->ssl->no_send_shutdown) { SSL_set_quiet_shutdown(c->ssl->connection, 1); } } SSL_set_shutdown(c->ssl->connection, mode); ngx_ssl_clear_error(c->log); n = SSL_shutdown(c->ssl->connection); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_shutdown: %d", n); sslerr = 0; /* before 0.9.8m SSL_shutdown() returned 0 instead of -1 on errors */ if (n != 1 && ERR_peek_error()) { sslerr = SSL_get_error(c->ssl->connection, n); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_get_error: %d", sslerr); } if (n == 1 || sslerr == 0 || sslerr == SSL_ERROR_ZERO_RETURN) { SSL_free(c->ssl->connection); c->ssl = NULL; return NGX_OK; } if (sslerr == SSL_ERROR_WANT_READ || sslerr == SSL_ERROR_WANT_WRITE) { c->read->handler = ngx_ssl_shutdown_handler; c->write->handler = ngx_ssl_shutdown_handler; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { return NGX_ERROR; } if (ngx_handle_write_event(c->write, 0) != NGX_OK) { return NGX_ERROR; } if (sslerr == SSL_ERROR_WANT_READ) { ngx_add_timer(c->read, 30000); } return NGX_AGAIN; } err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0; ngx_ssl_connection_error(c, sslerr, err, "SSL_shutdown() failed"); SSL_free(c->ssl->connection); c->ssl = NULL; return NGX_ERROR; } static void ngx_ssl_shutdown_handler(ngx_event_t *ev) { ngx_connection_t *c; ngx_connection_handler_pt handler; c = ev->data; handler = c->ssl->handler; if (ev->timedout) { c->timedout = 1; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "SSL shutdown handler"); if (ngx_ssl_shutdown(c) == NGX_AGAIN) { return; } handler(c); } static void ngx_ssl_connection_error(ngx_connection_t *c, int sslerr, ngx_err_t err, char *text) { int n; ngx_uint_t level; level = NGX_LOG_CRIT; if (sslerr == SSL_ERROR_SYSCALL) { if (err == NGX_ECONNRESET || err == NGX_EPIPE || err == NGX_ENOTCONN || err == NGX_ETIMEDOUT || err == NGX_ECONNREFUSED || err == NGX_ENETDOWN || err == NGX_ENETUNREACH || err == NGX_EHOSTDOWN || err == NGX_EHOSTUNREACH) { switch (c->log_error) { case NGX_ERROR_IGNORE_ECONNRESET: case NGX_ERROR_INFO: level = NGX_LOG_INFO; break; case NGX_ERROR_ERR: level = NGX_LOG_ERR; break; default: break; } } } else if (sslerr == SSL_ERROR_SSL) { n = ERR_GET_REASON(ERR_peek_error()); /* handshake failures */ if (n == SSL_R_BAD_CHANGE_CIPHER_SPEC /* 103 */ || n == SSL_R_BLOCK_CIPHER_PAD_IS_WRONG /* 129 */ || n == SSL_R_DIGEST_CHECK_FAILED /* 149 */ || n == SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST /* 151 */ || n == SSL_R_EXCESSIVE_MESSAGE_SIZE /* 152 */ || n == SSL_R_LENGTH_MISMATCH /* 159 */ #ifdef SSL_R_NO_CIPHERS_PASSED || n == SSL_R_NO_CIPHERS_PASSED /* 182 */ #endif || n == SSL_R_NO_CIPHERS_SPECIFIED /* 183 */ || n == SSL_R_NO_COMPRESSION_SPECIFIED /* 187 */ || n == SSL_R_NO_SHARED_CIPHER /* 193 */ || n == SSL_R_RECORD_LENGTH_MISMATCH /* 213 */ #ifdef SSL_R_PARSE_TLSEXT || n == SSL_R_PARSE_TLSEXT /* 227 */ #endif || n == SSL_R_UNEXPECTED_MESSAGE /* 244 */ || n == SSL_R_UNEXPECTED_RECORD /* 245 */ || n == SSL_R_UNKNOWN_ALERT_TYPE /* 246 */ || n == SSL_R_UNKNOWN_PROTOCOL /* 252 */ || n == SSL_R_WRONG_VERSION_NUMBER /* 267 */ || n == SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC /* 281 */ #ifdef SSL_R_RENEGOTIATE_EXT_TOO_LONG || n == SSL_R_RENEGOTIATE_EXT_TOO_LONG /* 335 */ || n == SSL_R_RENEGOTIATION_ENCODING_ERR /* 336 */ || n == SSL_R_RENEGOTIATION_MISMATCH /* 337 */ #endif #ifdef SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED || n == SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED /* 338 */ #endif #ifdef SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING || n == SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING /* 345 */ #endif #ifdef SSL_R_INAPPROPRIATE_FALLBACK || n == SSL_R_INAPPROPRIATE_FALLBACK /* 373 */ #endif || n == 1000 /* SSL_R_SSLV3_ALERT_CLOSE_NOTIFY */ #ifdef SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE || n == SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE /* 1010 */ || n == SSL_R_SSLV3_ALERT_BAD_RECORD_MAC /* 1020 */ || n == SSL_R_TLSV1_ALERT_DECRYPTION_FAILED /* 1021 */ || n == SSL_R_TLSV1_ALERT_RECORD_OVERFLOW /* 1022 */ || n == SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE /* 1030 */ || n == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE /* 1040 */ || n == SSL_R_SSLV3_ALERT_NO_CERTIFICATE /* 1041 */ || n == SSL_R_SSLV3_ALERT_BAD_CERTIFICATE /* 1042 */ || n == SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE /* 1043 */ || n == SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED /* 1044 */ || n == SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED /* 1045 */ || n == SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN /* 1046 */ || n == SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER /* 1047 */ || n == SSL_R_TLSV1_ALERT_UNKNOWN_CA /* 1048 */ || n == SSL_R_TLSV1_ALERT_ACCESS_DENIED /* 1049 */ || n == SSL_R_TLSV1_ALERT_DECODE_ERROR /* 1050 */ || n == SSL_R_TLSV1_ALERT_DECRYPT_ERROR /* 1051 */ || n == SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION /* 1060 */ || n == SSL_R_TLSV1_ALERT_PROTOCOL_VERSION /* 1070 */ || n == SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY /* 1071 */ || n == SSL_R_TLSV1_ALERT_INTERNAL_ERROR /* 1080 */ || n == SSL_R_TLSV1_ALERT_USER_CANCELLED /* 1090 */ || n == SSL_R_TLSV1_ALERT_NO_RENEGOTIATION /* 1100 */ #endif ) { switch (c->log_error) { case NGX_ERROR_IGNORE_ECONNRESET: case NGX_ERROR_INFO: level = NGX_LOG_INFO; break; case NGX_ERROR_ERR: level = NGX_LOG_ERR; break; default: break; } } } ngx_ssl_error(level, c->log, err, text); } static void ngx_ssl_clear_error(ngx_log_t *log) { while (ERR_peek_error()) { ngx_ssl_error(NGX_LOG_ALERT, log, 0, "ignoring stale global SSL error"); } ERR_clear_error(); } void ngx_cdecl ngx_ssl_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err, char *fmt, ...) { int flags; u_long n; va_list args; u_char *p, *last; u_char errstr[NGX_MAX_CONF_ERRSTR]; const char *data; last = errstr + NGX_MAX_CONF_ERRSTR; va_start(args, fmt); p = ngx_vslprintf(errstr, last - 1, fmt, args); va_end(args); p = ngx_cpystrn(p, (u_char *) " (SSL:", last - p); for ( ;; ) { n = ERR_peek_error_line_data(NULL, NULL, &data, &flags); if (n == 0) { break; } /* ERR_error_string_n() requires at least one byte */ if (p >= last - 1) { goto next; } *p++ = ' '; ERR_error_string_n(n, (char *) p, last - p); while (p < last && *p) { p++; } if (p < last && *data && (flags & ERR_TXT_STRING)) { *p++ = ':'; p = ngx_cpystrn(p, (u_char *) data, last - p); } next: (void) ERR_get_error(); } ngx_log_error(level, log, err, "%*s)", p - errstr, errstr); } ngx_int_t ngx_ssl_session_cache(ngx_ssl_t *ssl, ngx_str_t *sess_ctx, ssize_t builtin_session_cache, ngx_shm_zone_t *shm_zone, time_t timeout) { long cache_mode; SSL_CTX_set_timeout(ssl->ctx, (long) timeout); if (ngx_ssl_session_id_context(ssl, sess_ctx) != NGX_OK) { return NGX_ERROR; } if (builtin_session_cache == NGX_SSL_NO_SCACHE) { SSL_CTX_set_session_cache_mode(ssl->ctx, SSL_SESS_CACHE_OFF); return NGX_OK; } if (builtin_session_cache == NGX_SSL_NONE_SCACHE) { /* * If the server explicitly says that it does not support * session reuse (see SSL_SESS_CACHE_OFF above), then * Outlook Express fails to upload a sent email to * the Sent Items folder on the IMAP server via a separate IMAP * connection in the background. Therefore we have a special * mode (SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL_STORE) * where the server pretends that it supports session reuse, * but it does not actually store any session. */ SSL_CTX_set_session_cache_mode(ssl->ctx, SSL_SESS_CACHE_SERVER |SSL_SESS_CACHE_NO_AUTO_CLEAR |SSL_SESS_CACHE_NO_INTERNAL_STORE); SSL_CTX_sess_set_cache_size(ssl->ctx, 1); return NGX_OK; } cache_mode = SSL_SESS_CACHE_SERVER; if (shm_zone && builtin_session_cache == NGX_SSL_NO_BUILTIN_SCACHE) { cache_mode |= SSL_SESS_CACHE_NO_INTERNAL; } SSL_CTX_set_session_cache_mode(ssl->ctx, cache_mode); if (builtin_session_cache != NGX_SSL_NO_BUILTIN_SCACHE) { if (builtin_session_cache != NGX_SSL_DFLT_BUILTIN_SCACHE) { SSL_CTX_sess_set_cache_size(ssl->ctx, builtin_session_cache); } } if (shm_zone) { SSL_CTX_sess_set_new_cb(ssl->ctx, ngx_ssl_new_session); SSL_CTX_sess_set_get_cb(ssl->ctx, ngx_ssl_get_cached_session); SSL_CTX_sess_set_remove_cb(ssl->ctx, ngx_ssl_remove_session); if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_session_cache_index, shm_zone) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_ex_data() failed"); return NGX_ERROR; } } return NGX_OK; } static ngx_int_t ngx_ssl_session_id_context(ngx_ssl_t *ssl, ngx_str_t *sess_ctx) { int n, i; X509 *cert; X509_NAME *name; EVP_MD_CTX *md; unsigned int len; STACK_OF(X509_NAME) *list; u_char buf[EVP_MAX_MD_SIZE]; /* * Session ID context is set based on the string provided, * the server certificates, and the client CA list. */ md = EVP_MD_CTX_create(); if (md == NULL) { return NGX_ERROR; } if (EVP_DigestInit_ex(md, EVP_sha1(), NULL) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EVP_DigestInit_ex() failed"); goto failed; } if (EVP_DigestUpdate(md, sess_ctx->data, sess_ctx->len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EVP_DigestUpdate() failed"); goto failed; } for (cert = SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index); cert; cert = X509_get_ex_data(cert, ngx_ssl_next_certificate_index)) { if (X509_digest(cert, EVP_sha1(), buf, &len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_digest() failed"); goto failed; } if (EVP_DigestUpdate(md, buf, len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EVP_DigestUpdate() failed"); goto failed; } } list = SSL_CTX_get_client_CA_list(ssl->ctx); if (list != NULL) { n = sk_X509_NAME_num(list); for (i = 0; i < n; i++) { name = sk_X509_NAME_value(list, i); if (X509_NAME_digest(name, EVP_sha1(), buf, &len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "X509_NAME_digest() failed"); goto failed; } if (EVP_DigestUpdate(md, buf, len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EVP_DigestUpdate() failed"); goto failed; } } } if (EVP_DigestFinal_ex(md, buf, &len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "EVP_DigestUpdate() failed"); goto failed; } EVP_MD_CTX_destroy(md); if (SSL_CTX_set_session_id_context(ssl->ctx, buf, len) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_session_id_context() failed"); return NGX_ERROR; } return NGX_OK; failed: EVP_MD_CTX_destroy(md); return NGX_ERROR; } ngx_int_t ngx_ssl_session_cache_init(ngx_shm_zone_t *shm_zone, void *data) { size_t len; ngx_slab_pool_t *shpool; ngx_ssl_session_cache_t *cache; if (data) { shm_zone->data = data; return NGX_OK; } shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; if (shm_zone->shm.exists) { shm_zone->data = shpool->data; return NGX_OK; } cache = ngx_slab_alloc(shpool, sizeof(ngx_ssl_session_cache_t)); if (cache == NULL) { return NGX_ERROR; } shpool->data = cache; shm_zone->data = cache; ngx_rbtree_init(&cache->session_rbtree, &cache->sentinel, ngx_ssl_session_rbtree_insert_value); ngx_queue_init(&cache->expire_queue); len = sizeof(" in SSL session shared cache \"\"") + shm_zone->shm.name.len; shpool->log_ctx = ngx_slab_alloc(shpool, len); if (shpool->log_ctx == NULL) { return NGX_ERROR; } ngx_sprintf(shpool->log_ctx, " in SSL session shared cache \"%V\"%Z", &shm_zone->shm.name); shpool->log_nomem = 0; return NGX_OK; } /* * The length of the session id is 16 bytes for SSLv2 sessions and * between 1 and 32 bytes for SSLv3/TLSv1, typically 32 bytes. * It seems that the typical length of the external ASN1 representation * of a session is 118 or 119 bytes for SSLv3/TSLv1. * * Thus on 32-bit platforms we allocate separately an rbtree node, * a session id, and an ASN1 representation, they take accordingly * 64, 32, and 128 bytes. * * On 64-bit platforms we allocate separately an rbtree node + session_id, * and an ASN1 representation, they take accordingly 128 and 128 bytes. * * OpenSSL's i2d_SSL_SESSION() and d2i_SSL_SESSION are slow, * so they are outside the code locked by shared pool mutex */ static int ngx_ssl_new_session(ngx_ssl_conn_t *ssl_conn, ngx_ssl_session_t *sess) { int len; u_char *p, *id, *cached_sess, *session_id; uint32_t hash; SSL_CTX *ssl_ctx; unsigned int session_id_length; ngx_shm_zone_t *shm_zone; ngx_connection_t *c; ngx_slab_pool_t *shpool; ngx_ssl_sess_id_t *sess_id; ngx_ssl_session_cache_t *cache; u_char buf[NGX_SSL_MAX_SESSION_SIZE]; len = i2d_SSL_SESSION(sess, NULL); /* do not cache too big session */ if (len > (int) NGX_SSL_MAX_SESSION_SIZE) { return 0; } p = buf; i2d_SSL_SESSION(sess, &p); c = ngx_ssl_get_connection(ssl_conn); ssl_ctx = c->ssl->session_ctx; shm_zone = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_cache_index); cache = shm_zone->data; shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; ngx_shmtx_lock(&shpool->mutex); /* drop one or two expired sessions */ ngx_ssl_expire_sessions(cache, shpool, 1); cached_sess = ngx_slab_alloc_locked(shpool, len); if (cached_sess == NULL) { /* drop the oldest non-expired session and try once more */ ngx_ssl_expire_sessions(cache, shpool, 0); cached_sess = ngx_slab_alloc_locked(shpool, len); if (cached_sess == NULL) { sess_id = NULL; goto failed; } } sess_id = ngx_slab_alloc_locked(shpool, sizeof(ngx_ssl_sess_id_t)); if (sess_id == NULL) { /* drop the oldest non-expired session and try once more */ ngx_ssl_expire_sessions(cache, shpool, 0); sess_id = ngx_slab_alloc_locked(shpool, sizeof(ngx_ssl_sess_id_t)); if (sess_id == NULL) { goto failed; } } #if OPENSSL_VERSION_NUMBER >= 0x0090800fL session_id = (u_char *) SSL_SESSION_get_id(sess, &session_id_length); #else session_id = sess->session_id; session_id_length = sess->session_id_length; #endif #if (NGX_PTR_SIZE == 8) id = sess_id->sess_id; #else id = ngx_slab_alloc_locked(shpool, session_id_length); if (id == NULL) { /* drop the oldest non-expired session and try once more */ ngx_ssl_expire_sessions(cache, shpool, 0); id = ngx_slab_alloc_locked(shpool, session_id_length); if (id == NULL) { goto failed; } } #endif ngx_memcpy(cached_sess, buf, len); ngx_memcpy(id, session_id, session_id_length); hash = ngx_crc32_short(session_id, session_id_length); ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "ssl new session: %08XD:%ud:%d", hash, session_id_length, len); sess_id->node.key = hash; sess_id->node.data = (u_char) session_id_length; sess_id->id = id; sess_id->len = len; sess_id->session = cached_sess; sess_id->expire = ngx_time() + SSL_CTX_get_timeout(ssl_ctx); ngx_queue_insert_head(&cache->expire_queue, &sess_id->queue); ngx_rbtree_insert(&cache->session_rbtree, &sess_id->node); ngx_shmtx_unlock(&shpool->mutex); return 0; failed: if (cached_sess) { ngx_slab_free_locked(shpool, cached_sess); } if (sess_id) { ngx_slab_free_locked(shpool, sess_id); } ngx_shmtx_unlock(&shpool->mutex); ngx_log_error(NGX_LOG_ALERT, c->log, 0, "could not allocate new session%s", shpool->log_ctx); return 0; } static ngx_ssl_session_t * ngx_ssl_get_cached_session(ngx_ssl_conn_t *ssl_conn, #if OPENSSL_VERSION_NUMBER >= 0x10100003L const #endif u_char *id, int len, int *copy) { #if OPENSSL_VERSION_NUMBER >= 0x0090707fL const #endif u_char *p; uint32_t hash; ngx_int_t rc; ngx_shm_zone_t *shm_zone; ngx_slab_pool_t *shpool; ngx_rbtree_node_t *node, *sentinel; ngx_ssl_session_t *sess; ngx_ssl_sess_id_t *sess_id; ngx_ssl_session_cache_t *cache; u_char buf[NGX_SSL_MAX_SESSION_SIZE]; ngx_connection_t *c; hash = ngx_crc32_short((u_char *) (uintptr_t) id, (size_t) len); *copy = 0; c = ngx_ssl_get_connection(ssl_conn); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "ssl get session: %08XD:%d", hash, len); shm_zone = SSL_CTX_get_ex_data(c->ssl->session_ctx, ngx_ssl_session_cache_index); cache = shm_zone->data; sess = NULL; shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; ngx_shmtx_lock(&shpool->mutex); node = cache->session_rbtree.root; sentinel = cache->session_rbtree.sentinel; while (node != sentinel) { if (hash < node->key) { node = node->left; continue; } if (hash > node->key) { node = node->right; continue; } /* hash == node->key */ sess_id = (ngx_ssl_sess_id_t *) node; rc = ngx_memn2cmp((u_char *) (uintptr_t) id, sess_id->id, (size_t) len, (size_t) node->data); if (rc == 0) { if (sess_id->expire > ngx_time()) { ngx_memcpy(buf, sess_id->session, sess_id->len); ngx_shmtx_unlock(&shpool->mutex); p = buf; sess = d2i_SSL_SESSION(NULL, &p, sess_id->len); return sess; } ngx_queue_remove(&sess_id->queue); ngx_rbtree_delete(&cache->session_rbtree, node); ngx_slab_free_locked(shpool, sess_id->session); #if (NGX_PTR_SIZE == 4) ngx_slab_free_locked(shpool, sess_id->id); #endif ngx_slab_free_locked(shpool, sess_id); sess = NULL; goto done; } node = (rc < 0) ? node->left : node->right; } done: ngx_shmtx_unlock(&shpool->mutex); return sess; } void ngx_ssl_remove_cached_session(SSL_CTX *ssl, ngx_ssl_session_t *sess) { SSL_CTX_remove_session(ssl, sess); ngx_ssl_remove_session(ssl, sess); } static void ngx_ssl_remove_session(SSL_CTX *ssl, ngx_ssl_session_t *sess) { u_char *id; uint32_t hash; ngx_int_t rc; unsigned int len; ngx_shm_zone_t *shm_zone; ngx_slab_pool_t *shpool; ngx_rbtree_node_t *node, *sentinel; ngx_ssl_sess_id_t *sess_id; ngx_ssl_session_cache_t *cache; shm_zone = SSL_CTX_get_ex_data(ssl, ngx_ssl_session_cache_index); if (shm_zone == NULL) { return; } cache = shm_zone->data; #if OPENSSL_VERSION_NUMBER >= 0x0090800fL id = (u_char *) SSL_SESSION_get_id(sess, &len); #else id = sess->session_id; len = sess->session_id_length; #endif hash = ngx_crc32_short(id, len); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "ssl remove session: %08XD:%ud", hash, len); shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; ngx_shmtx_lock(&shpool->mutex); node = cache->session_rbtree.root; sentinel = cache->session_rbtree.sentinel; while (node != sentinel) { if (hash < node->key) { node = node->left; continue; } if (hash > node->key) { node = node->right; continue; } /* hash == node->key */ sess_id = (ngx_ssl_sess_id_t *) node; rc = ngx_memn2cmp(id, sess_id->id, len, (size_t) node->data); if (rc == 0) { ngx_queue_remove(&sess_id->queue); ngx_rbtree_delete(&cache->session_rbtree, node); ngx_slab_free_locked(shpool, sess_id->session); #if (NGX_PTR_SIZE == 4) ngx_slab_free_locked(shpool, sess_id->id); #endif ngx_slab_free_locked(shpool, sess_id); goto done; } node = (rc < 0) ? node->left : node->right; } done: ngx_shmtx_unlock(&shpool->mutex); } static void ngx_ssl_expire_sessions(ngx_ssl_session_cache_t *cache, ngx_slab_pool_t *shpool, ngx_uint_t n) { time_t now; ngx_queue_t *q; ngx_ssl_sess_id_t *sess_id; now = ngx_time(); while (n < 3) { if (ngx_queue_empty(&cache->expire_queue)) { return; } q = ngx_queue_last(&cache->expire_queue); sess_id = ngx_queue_data(q, ngx_ssl_sess_id_t, queue); if (n++ != 0 && sess_id->expire > now) { return; } ngx_queue_remove(q); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "expire session: %08Xi", sess_id->node.key); ngx_rbtree_delete(&cache->session_rbtree, &sess_id->node); ngx_slab_free_locked(shpool, sess_id->session); #if (NGX_PTR_SIZE == 4) ngx_slab_free_locked(shpool, sess_id->id); #endif ngx_slab_free_locked(shpool, sess_id); } } static void ngx_ssl_session_rbtree_insert_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) { ngx_rbtree_node_t **p; ngx_ssl_sess_id_t *sess_id, *sess_id_temp; for ( ;; ) { if (node->key < temp->key) { p = &temp->left; } else if (node->key > temp->key) { p = &temp->right; } else { /* node->key == temp->key */ sess_id = (ngx_ssl_sess_id_t *) node; sess_id_temp = (ngx_ssl_sess_id_t *) temp; p = (ngx_memn2cmp(sess_id->id, sess_id_temp->id, (size_t) node->data, (size_t) temp->data) < 0) ? &temp->left : &temp->right; } if (*p == sentinel) { break; } temp = *p; } *p = node; node->parent = temp; node->left = sentinel; node->right = sentinel; ngx_rbt_red(node); } #ifdef SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB ngx_int_t ngx_ssl_session_ticket_keys(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *paths) { u_char buf[80]; size_t size; ssize_t n; ngx_str_t *path; ngx_file_t file; ngx_uint_t i; ngx_array_t *keys; ngx_file_info_t fi; ngx_ssl_session_ticket_key_t *key; if (paths == NULL) { return NGX_OK; } keys = ngx_array_create(cf->pool, paths->nelts, sizeof(ngx_ssl_session_ticket_key_t)); if (keys == NULL) { return NGX_ERROR; } path = paths->elts; for (i = 0; i < paths->nelts; i++) { if (ngx_conf_full_name(cf->cycle, &path[i], 1) != NGX_OK) { return NGX_ERROR; } ngx_memzero(&file, sizeof(ngx_file_t)); file.name = path[i]; file.log = cf->log; file.fd = ngx_open_file(file.name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); if (file.fd == NGX_INVALID_FILE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, ngx_open_file_n " \"%V\" failed", &file.name); return NGX_ERROR; } if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) { ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno, ngx_fd_info_n " \"%V\" failed", &file.name); goto failed; } size = ngx_file_size(&fi); if (size != 48 && size != 80) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"%V\" must be 48 or 80 bytes", &file.name); goto failed; } n = ngx_read_file(&file, buf, size, 0); if (n == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno, ngx_read_file_n " \"%V\" failed", &file.name); goto failed; } if ((size_t) n != size) { ngx_conf_log_error(NGX_LOG_CRIT, cf, 0, ngx_read_file_n " \"%V\" returned only " "%z bytes instead of %uz", &file.name, n, size); goto failed; } key = ngx_array_push(keys); if (key == NULL) { goto failed; } if (size == 48) { key->size = 48; ngx_memcpy(key->name, buf, 16); ngx_memcpy(key->aes_key, buf + 16, 16); ngx_memcpy(key->hmac_key, buf + 32, 16); } else { key->size = 80; ngx_memcpy(key->name, buf, 16); ngx_memcpy(key->hmac_key, buf + 16, 32); ngx_memcpy(key->aes_key, buf + 48, 32); } if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno, ngx_close_file_n " \"%V\" failed", &file.name); } } if (SSL_CTX_set_ex_data(ssl->ctx, ngx_ssl_session_ticket_keys_index, keys) == 0) { ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "SSL_CTX_set_ex_data() failed"); return NGX_ERROR; } if (SSL_CTX_set_tlsext_ticket_key_cb(ssl->ctx, ngx_ssl_session_ticket_key_callback) == 0) { ngx_log_error(NGX_LOG_WARN, cf->log, 0, "nginx was built with Session Tickets support, however, " "now it is linked dynamically to an OpenSSL library " "which has no tlsext support, therefore Session Tickets " "are not available"); } return NGX_OK; failed: if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno, ngx_close_file_n " \"%V\" failed", &file.name); } return NGX_ERROR; } static int ngx_ssl_session_ticket_key_callback(ngx_ssl_conn_t *ssl_conn, unsigned char *name, unsigned char *iv, EVP_CIPHER_CTX *ectx, HMAC_CTX *hctx, int enc) { size_t size; SSL_CTX *ssl_ctx; ngx_uint_t i; ngx_array_t *keys; ngx_connection_t *c; ngx_ssl_session_ticket_key_t *key; const EVP_MD *digest; const EVP_CIPHER *cipher; #if (NGX_DEBUG) u_char buf[32]; #endif c = ngx_ssl_get_connection(ssl_conn); ssl_ctx = c->ssl->session_ctx; #ifdef OPENSSL_NO_SHA256 digest = EVP_sha1(); #else digest = EVP_sha256(); #endif keys = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_ticket_keys_index); if (keys == NULL) { return -1; } key = keys->elts; if (enc == 1) { /* encrypt session ticket */ ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "ssl session ticket encrypt, key: \"%*s\" (%s session)", ngx_hex_dump(buf, key[0].name, 16) - buf, buf, SSL_session_reused(ssl_conn) ? "reused" : "new"); if (key[0].size == 48) { cipher = EVP_aes_128_cbc(); size = 16; } else { cipher = EVP_aes_256_cbc(); size = 32; } if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) != 1) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "RAND_bytes() failed"); return -1; } if (EVP_EncryptInit_ex(ectx, cipher, NULL, key[0].aes_key, iv) != 1) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "EVP_EncryptInit_ex() failed"); return -1; } #if OPENSSL_VERSION_NUMBER >= 0x10000000L if (HMAC_Init_ex(hctx, key[0].hmac_key, size, digest, NULL) != 1) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "HMAC_Init_ex() failed"); return -1; } #else HMAC_Init_ex(hctx, key[0].hmac_key, size, digest, NULL); #endif ngx_memcpy(name, key[0].name, 16); return 1; } else { /* decrypt session ticket */ for (i = 0; i < keys->nelts; i++) { if (ngx_memcmp(name, key[i].name, 16) == 0) { goto found; } } ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "ssl session ticket decrypt, key: \"%*s\" not found", ngx_hex_dump(buf, name, 16) - buf, buf); return 0; found: ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "ssl session ticket decrypt, key: \"%*s\"%s", ngx_hex_dump(buf, key[i].name, 16) - buf, buf, (i == 0) ? " (default)" : ""); if (key[i].size == 48) { cipher = EVP_aes_128_cbc(); size = 16; } else { cipher = EVP_aes_256_cbc(); size = 32; } #if OPENSSL_VERSION_NUMBER >= 0x10000000L if (HMAC_Init_ex(hctx, key[i].hmac_key, size, digest, NULL) != 1) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "HMAC_Init_ex() failed"); return -1; } #else HMAC_Init_ex(hctx, key[i].hmac_key, size, digest, NULL); #endif if (EVP_DecryptInit_ex(ectx, cipher, NULL, key[i].aes_key, iv) != 1) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "EVP_DecryptInit_ex() failed"); return -1; } return (i == 0) ? 1 : 2 /* renew */; } } #else ngx_int_t ngx_ssl_session_ticket_keys(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_array_t *paths) { if (paths) { ngx_log_error(NGX_LOG_WARN, ssl->log, 0, "\"ssl_session_ticket_key\" ignored, not supported"); } return NGX_OK; } #endif void ngx_ssl_cleanup_ctx(void *data) { ngx_ssl_t *ssl = data; X509 *cert, *next; cert = SSL_CTX_get_ex_data(ssl->ctx, ngx_ssl_certificate_index); while (cert) { next = X509_get_ex_data(cert, ngx_ssl_next_certificate_index); X509_free(cert); cert = next; } SSL_CTX_free(ssl->ctx); } ngx_int_t ngx_ssl_check_host(ngx_connection_t *c, ngx_str_t *name) { X509 *cert; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_ERROR; } #ifdef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT /* X509_check_host() is only available in OpenSSL 1.0.2+ */ if (name->len == 0) { goto failed; } if (X509_check_host(cert, (char *) name->data, name->len, 0, NULL) != 1) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "X509_check_host(): no match"); goto failed; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "X509_check_host(): match"); goto found; #else { int n, i; X509_NAME *sname; ASN1_STRING *str; X509_NAME_ENTRY *entry; GENERAL_NAME *altname; STACK_OF(GENERAL_NAME) *altnames; /* * As per RFC6125 and RFC2818, we check subjectAltName extension, * and if it's not present - commonName in Subject is checked. */ altnames = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); if (altnames) { n = sk_GENERAL_NAME_num(altnames); for (i = 0; i < n; i++) { altname = sk_GENERAL_NAME_value(altnames, i); if (altname->type != GEN_DNS) { continue; } str = altname->d.dNSName; ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL subjectAltName: \"%*s\"", ASN1_STRING_length(str), ASN1_STRING_data(str)); if (ngx_ssl_check_name(name, str) == NGX_OK) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL subjectAltName: match"); GENERAL_NAMES_free(altnames); goto found; } } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL subjectAltName: no match"); GENERAL_NAMES_free(altnames); goto failed; } /* * If there is no subjectAltName extension, check commonName * in Subject. While RFC2818 requires to only check "most specific" * CN, both Apache and OpenSSL check all CNs, and so do we. */ sname = X509_get_subject_name(cert); if (sname == NULL) { goto failed; } i = -1; for ( ;; ) { i = X509_NAME_get_index_by_NID(sname, NID_commonName, i); if (i < 0) { break; } entry = X509_NAME_get_entry(sname, i); str = X509_NAME_ENTRY_get_data(entry); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL commonName: \"%*s\"", ASN1_STRING_length(str), ASN1_STRING_data(str)); if (ngx_ssl_check_name(name, str) == NGX_OK) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL commonName: match"); goto found; } } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL commonName: no match"); } #endif failed: X509_free(cert); return NGX_ERROR; found: X509_free(cert); return NGX_OK; } #ifndef X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT static ngx_int_t ngx_ssl_check_name(ngx_str_t *name, ASN1_STRING *pattern) { u_char *s, *p, *end; size_t slen, plen; s = name->data; slen = name->len; p = ASN1_STRING_data(pattern); plen = ASN1_STRING_length(pattern); if (slen == plen && ngx_strncasecmp(s, p, plen) == 0) { return NGX_OK; } if (plen > 2 && p[0] == '*' && p[1] == '.') { plen -= 1; p += 1; end = s + slen; s = ngx_strlchr(s, end, '.'); if (s == NULL) { return NGX_ERROR; } slen = end - s; if (plen == slen && ngx_strncasecmp(s, p, plen) == 0) { return NGX_OK; } } return NGX_ERROR; } #endif ngx_int_t ngx_ssl_get_protocol(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { s->data = (u_char *) SSL_get_version(c->ssl->connection); return NGX_OK; } ngx_int_t ngx_ssl_get_cipher_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { s->data = (u_char *) SSL_get_cipher_name(c->ssl->connection); return NGX_OK; } ngx_int_t ngx_ssl_get_ciphers(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { #ifdef SSL_CTRL_GET_RAW_CIPHERLIST int n, i, bytes; size_t len; u_char *ciphers, *p; const SSL_CIPHER *cipher; bytes = SSL_get0_raw_cipherlist(c->ssl->connection, NULL); n = SSL_get0_raw_cipherlist(c->ssl->connection, &ciphers); if (n <= 0) { s->len = 0; return NGX_OK; } len = 0; n /= bytes; for (i = 0; i < n; i++) { cipher = SSL_CIPHER_find(c->ssl->connection, ciphers + i * bytes); if (cipher) { len += ngx_strlen(SSL_CIPHER_get_name(cipher)); } else { len += sizeof("0x") - 1 + bytes * (sizeof("00") - 1); } len += sizeof(":") - 1; } s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { return NGX_ERROR; } p = s->data; for (i = 0; i < n; i++) { cipher = SSL_CIPHER_find(c->ssl->connection, ciphers + i * bytes); if (cipher) { p = ngx_sprintf(p, "%s", SSL_CIPHER_get_name(cipher)); } else { p = ngx_sprintf(p, "0x"); p = ngx_hex_dump(p, ciphers + i * bytes, bytes); } *p++ = ':'; } p--; s->len = p - s->data; #else u_char buf[4096]; if (SSL_get_shared_ciphers(c->ssl->connection, (char *) buf, 4096) == NULL) { s->len = 0; return NGX_OK; } s->len = ngx_strlen(buf); s->data = ngx_pnalloc(pool, s->len); if (s->data == NULL) { return NGX_ERROR; } ngx_memcpy(s->data, buf, s->len); #endif return NGX_OK; } ngx_int_t ngx_ssl_get_curves(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { #ifdef SSL_CTRL_GET_CURVES int *curves, n, i, nid; u_char *p; size_t len; n = SSL_get1_curves(c->ssl->connection, NULL); if (n <= 0) { s->len = 0; return NGX_OK; } curves = ngx_palloc(pool, n * sizeof(int)); n = SSL_get1_curves(c->ssl->connection, curves); len = 0; for (i = 0; i < n; i++) { nid = curves[i]; if (nid & TLSEXT_nid_unknown) { len += sizeof("0x0000") - 1; } else { len += ngx_strlen(OBJ_nid2sn(nid)); } len += sizeof(":") - 1; } s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { return NGX_ERROR; } p = s->data; for (i = 0; i < n; i++) { nid = curves[i]; if (nid & TLSEXT_nid_unknown) { p = ngx_sprintf(p, "0x%04xd", nid & 0xffff); } else { p = ngx_sprintf(p, "%s", OBJ_nid2sn(nid)); } *p++ = ':'; } p--; s->len = p - s->data; #else s->len = 0; #endif return NGX_OK; } ngx_int_t ngx_ssl_get_session_id(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { u_char *buf; SSL_SESSION *sess; unsigned int len; sess = SSL_get0_session(c->ssl->connection); if (sess == NULL) { s->len = 0; return NGX_OK; } #if OPENSSL_VERSION_NUMBER >= 0x0090800fL buf = (u_char *) SSL_SESSION_get_id(sess, &len); #else buf = sess->session_id; len = sess->session_id_length; #endif s->len = 2 * len; s->data = ngx_pnalloc(pool, 2 * len); if (s->data == NULL) { return NGX_ERROR; } ngx_hex_dump(s->data, buf, len); return NGX_OK; } ngx_int_t ngx_ssl_get_session_reused(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { if (SSL_session_reused(c->ssl->connection)) { ngx_str_set(s, "r"); } else { ngx_str_set(s, "."); } return NGX_OK; } ngx_int_t ngx_ssl_get_server_name(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME size_t len; const char *name; name = SSL_get_servername(c->ssl->connection, TLSEXT_NAMETYPE_host_name); if (name) { len = ngx_strlen(name); s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { return NGX_ERROR; } ngx_memcpy(s->data, name, len); return NGX_OK; } #endif s->len = 0; return NGX_OK; } ngx_int_t ngx_ssl_get_raw_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { size_t len; BIO *bio; X509 *cert; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "BIO_new() failed"); X509_free(cert); return NGX_ERROR; } if (PEM_write_bio_X509(bio, cert) == 0) { ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "PEM_write_bio_X509() failed"); goto failed; } len = BIO_pending(bio); s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { goto failed; } BIO_read(bio, s->data, len); BIO_free(bio); X509_free(cert); return NGX_OK; failed: BIO_free(bio); X509_free(cert); return NGX_ERROR; } ngx_int_t ngx_ssl_get_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { u_char *p; size_t len; ngx_uint_t i; ngx_str_t cert; if (ngx_ssl_get_raw_certificate(c, pool, &cert) != NGX_OK) { return NGX_ERROR; } if (cert.len == 0) { s->len = 0; return NGX_OK; } len = cert.len - 1; for (i = 0; i < cert.len - 1; i++) { if (cert.data[i] == LF) { len++; } } s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { return NGX_ERROR; } p = s->data; for (i = 0; i < cert.len - 1; i++) { *p++ = cert.data[i]; if (cert.data[i] == LF) { *p++ = '\t'; } } return NGX_OK; } ngx_int_t ngx_ssl_get_escaped_certificate(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { ngx_str_t cert; uintptr_t n; if (ngx_ssl_get_raw_certificate(c, pool, &cert) != NGX_OK) { return NGX_ERROR; } if (cert.len == 0) { s->len = 0; return NGX_OK; } n = ngx_escape_uri(NULL, cert.data, cert.len, NGX_ESCAPE_URI_COMPONENT); s->len = cert.len + n * 2; s->data = ngx_pnalloc(pool, s->len); if (s->data == NULL) { return NGX_ERROR; } ngx_escape_uri(s->data, cert.data, cert.len, NGX_ESCAPE_URI_COMPONENT); return NGX_OK; } ngx_int_t ngx_ssl_get_subject_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { BIO *bio; X509 *cert; X509_NAME *name; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } name = X509_get_subject_name(cert); if (name == NULL) { return NGX_ERROR; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { X509_free(cert); return NGX_ERROR; } if (X509_NAME_print_ex(bio, name, 0, XN_FLAG_RFC2253) < 0) { goto failed; } s->len = BIO_pending(bio); s->data = ngx_pnalloc(pool, s->len); if (s->data == NULL) { goto failed; } BIO_read(bio, s->data, s->len); BIO_free(bio); X509_free(cert); return NGX_OK; failed: BIO_free(bio); X509_free(cert); return NGX_ERROR; } ngx_int_t ngx_ssl_get_issuer_dn(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { BIO *bio; X509 *cert; X509_NAME *name; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } name = X509_get_issuer_name(cert); if (name == NULL) { return NGX_ERROR; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { X509_free(cert); return NGX_ERROR; } if (X509_NAME_print_ex(bio, name, 0, XN_FLAG_RFC2253) < 0) { goto failed; } s->len = BIO_pending(bio); s->data = ngx_pnalloc(pool, s->len); if (s->data == NULL) { goto failed; } BIO_read(bio, s->data, s->len); BIO_free(bio); X509_free(cert); return NGX_OK; failed: BIO_free(bio); X509_free(cert); return NGX_ERROR; } ngx_int_t ngx_ssl_get_subject_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { char *p; size_t len; X509 *cert; X509_NAME *name; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } name = X509_get_subject_name(cert); if (name == NULL) { X509_free(cert); return NGX_ERROR; } p = X509_NAME_oneline(name, NULL, 0); for (len = 0; p[len]; len++) { /* void */ } s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { OPENSSL_free(p); X509_free(cert); return NGX_ERROR; } ngx_memcpy(s->data, p, len); OPENSSL_free(p); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_issuer_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { char *p; size_t len; X509 *cert; X509_NAME *name; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } name = X509_get_issuer_name(cert); if (name == NULL) { X509_free(cert); return NGX_ERROR; } p = X509_NAME_oneline(name, NULL, 0); for (len = 0; p[len]; len++) { /* void */ } s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { OPENSSL_free(p); X509_free(cert); return NGX_ERROR; } ngx_memcpy(s->data, p, len); OPENSSL_free(p); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { size_t len; X509 *cert; BIO *bio; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { X509_free(cert); return NGX_ERROR; } i2a_ASN1_INTEGER(bio, X509_get_serialNumber(cert)); len = BIO_pending(bio); s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { BIO_free(bio); X509_free(cert); return NGX_ERROR; } BIO_read(bio, s->data, len); BIO_free(bio); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { X509 *cert; unsigned int len; u_char buf[EVP_MAX_MD_SIZE]; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } if (!X509_digest(cert, EVP_sha1(), buf, &len)) { X509_free(cert); return NGX_ERROR; } s->len = 2 * len; s->data = ngx_pnalloc(pool, 2 * len); if (s->data == NULL) { X509_free(cert); return NGX_ERROR; } ngx_hex_dump(s->data, buf, len); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { X509 *cert; long rc; const char *str; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { ngx_str_set(s, "NONE"); return NGX_OK; } X509_free(cert); rc = SSL_get_verify_result(c->ssl->connection); if (rc == X509_V_OK) { ngx_str_set(s, "SUCCESS"); return NGX_OK; } str = X509_verify_cert_error_string(rc); s->data = ngx_pnalloc(pool, sizeof("FAILED:") - 1 + ngx_strlen(str)); if (s->data == NULL) { return NGX_ERROR; } s->len = ngx_sprintf(s->data, "FAILED:%s", str) - s->data; return NGX_OK; } ngx_int_t ngx_ssl_get_client_v_start(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { BIO *bio; X509 *cert; size_t len; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { X509_free(cert); return NGX_ERROR; } #if OPENSSL_VERSION_NUMBER > 0x10100000L ASN1_TIME_print(bio, X509_get0_notBefore(cert)); #else ASN1_TIME_print(bio, X509_get_notBefore(cert)); #endif len = BIO_pending(bio); s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { BIO_free(bio); X509_free(cert); return NGX_ERROR; } BIO_read(bio, s->data, len); BIO_free(bio); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_client_v_end(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { BIO *bio; X509 *cert; size_t len; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } bio = BIO_new(BIO_s_mem()); if (bio == NULL) { X509_free(cert); return NGX_ERROR; } #if OPENSSL_VERSION_NUMBER > 0x10100000L ASN1_TIME_print(bio, X509_get0_notAfter(cert)); #else ASN1_TIME_print(bio, X509_get_notAfter(cert)); #endif len = BIO_pending(bio); s->len = len; s->data = ngx_pnalloc(pool, len); if (s->data == NULL) { BIO_free(bio); X509_free(cert); return NGX_ERROR; } BIO_read(bio, s->data, len); BIO_free(bio); X509_free(cert); return NGX_OK; } ngx_int_t ngx_ssl_get_client_v_remain(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) { X509 *cert; time_t now, end; s->len = 0; cert = SSL_get_peer_certificate(c->ssl->connection); if (cert == NULL) { return NGX_OK; } #if OPENSSL_VERSION_NUMBER > 0x10100000L end = ngx_ssl_parse_time(X509_get0_notAfter(cert)); #else end = ngx_ssl_parse_time(X509_get_notAfter(cert)); #endif if (end == (time_t) NGX_ERROR) { X509_free(cert); return NGX_OK; } now = ngx_time(); if (end < now + 86400) { ngx_str_set(s, "0"); X509_free(cert); return NGX_OK; } s->data = ngx_pnalloc(pool, NGX_TIME_T_LEN); if (s->data == NULL) { X509_free(cert); return NGX_ERROR; } s->len = ngx_sprintf(s->data, "%T", (end - now) / 86400) - s->data; X509_free(cert); return NGX_OK; } static time_t ngx_ssl_parse_time( #if OPENSSL_VERSION_NUMBER > 0x10100000L const #endif ASN1_TIME *asn1time) { BIO *bio; char *value; size_t len; time_t time; /* * OpenSSL doesn't provide a way to convert ASN1_TIME * into time_t. To do this, we use ASN1_TIME_print(), * which uses the "MMM DD HH:MM:SS YYYY [GMT]" format (e.g., * "Feb 3 00:55:52 2015 GMT"), and parse the result. */ bio = BIO_new(BIO_s_mem()); if (bio == NULL) { return NGX_ERROR; } /* fake weekday prepended to match C asctime() format */ BIO_write(bio, "Tue ", sizeof("Tue ") - 1); ASN1_TIME_print(bio, asn1time); len = BIO_get_mem_data(bio, &value); time = ngx_parse_http_time((u_char *) value, len); BIO_free(bio); return time; } static void * ngx_openssl_create_conf(ngx_cycle_t *cycle) { ngx_openssl_conf_t *oscf; oscf = ngx_pcalloc(cycle->pool, sizeof(ngx_openssl_conf_t)); if (oscf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * oscf->engine = 0; */ return oscf; } static char * ngx_openssl_engine(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { #ifndef OPENSSL_NO_ENGINE ngx_openssl_conf_t *oscf = conf; ENGINE *engine; ngx_str_t *value; if (oscf->engine) { return "is duplicate"; } oscf->engine = 1; value = cf->args->elts; engine = ENGINE_by_id((char *) value[1].data); if (engine == NULL) { ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, "ENGINE_by_id(\"%V\") failed", &value[1]); return NGX_CONF_ERROR; } if (ENGINE_set_default(engine, ENGINE_METHOD_ALL) == 0) { ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, "ENGINE_set_default(\"%V\", ENGINE_METHOD_ALL) failed", &value[1]); ENGINE_free(engine); return NGX_CONF_ERROR; } ENGINE_free(engine); return NGX_CONF_OK; #else return "is not supported"; #endif } static void ngx_openssl_exit(ngx_cycle_t *cycle) { #if OPENSSL_VERSION_NUMBER < 0x10100003L EVP_cleanup(); #ifndef OPENSSL_NO_ENGINE ENGINE_cleanup(); #endif #endif }