Mercurial > hg > nginx-quic
view src/mail/ngx_mail_pop3_handler.c @ 9050:69c7df4fe5d3
SSL: switched to detect log level based on the last error.
In some cases there might be multiple errors in the OpenSSL error queue,
notably when a libcrypto call fails, and then the SSL layer generates
an error itself. For example, the following errors were observed
with OpenSSL 3.0.8 with TLSv1.3 enabled:
SSL_do_handshake() failed (SSL: error:02800066:Diffie-Hellman routines::invalid public key error:0A000132:SSL routines::bad ecpoint)
SSL_do_handshake() failed (SSL: error:08000066:elliptic curve routines::invalid encoding error:0A000132:SSL routines::bad ecpoint)
SSL_do_handshake() failed (SSL: error:0800006B:elliptic curve routines::point is not on curve error:0A000132:SSL routines::bad ecpoint)
In such cases it seems to be better to determine logging level based on
the last error in the error queue (the one added by the SSL layer,
SSL_R_BAD_ECPOINT in all of the above example example errors). To do so,
the ngx_ssl_connection_error() function was changed to use
ERR_peek_last_error().
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 08 Mar 2023 22:21:53 +0300 |
parents | 815c63581be4 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_mail.h> #include <ngx_mail_pop3_module.h> static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls); static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; static u_char pop3_ok[] = "+OK" CRLF; static u_char pop3_next[] = "+ " CRLF; static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; void ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) { u_char *p; ngx_mail_core_srv_conf_t *cscf; ngx_mail_pop3_srv_conf_t *pscf; pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); if (pscf->auth_methods & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { if (ngx_mail_salt(s, c, cscf) != NGX_OK) { ngx_mail_session_internal_server_error(s); return; } s->out.data = ngx_pnalloc(c->pool, sizeof(pop3_greeting) + s->salt.len); if (s->out.data == NULL) { ngx_mail_session_internal_server_error(s); return; } p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); *p++ = ' '; p = ngx_cpymem(p, s->salt.data, s->salt.len); s->out.len = p - s->out.data; } else { ngx_str_set(&s->out, pop3_greeting); } c->read->handler = ngx_mail_pop3_init_protocol; ngx_add_timer(c->read, cscf->timeout); if (ngx_handle_read_event(c->read, 0) != NGX_OK) { ngx_mail_close_connection(c); } ngx_mail_send(c->write); } void ngx_mail_pop3_init_protocol(ngx_event_t *rev) { ngx_connection_t *c; ngx_mail_session_t *s; c = rev->data; c->log->action = "in auth state"; if (rev->timedout) { ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); c->timedout = 1; ngx_mail_close_connection(c); return; } s = c->data; if (s->buffer == NULL) { if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) == NGX_ERROR) { ngx_mail_session_internal_server_error(s); return; } s->buffer = ngx_create_temp_buf(c->pool, 128); if (s->buffer == NULL) { ngx_mail_session_internal_server_error(s); return; } } s->mail_state = ngx_pop3_start; c->read->handler = ngx_mail_pop3_auth_state; ngx_mail_pop3_auth_state(rev); } void ngx_mail_pop3_auth_state(ngx_event_t *rev) { ngx_int_t rc; ngx_connection_t *c; ngx_mail_session_t *s; c = rev->data; s = c->data; ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); if (rev->timedout) { ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); c->timedout = 1; ngx_mail_close_connection(c); return; } if (s->out.len) { ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); s->blocked = 1; if (ngx_handle_read_event(c->read, 0) != NGX_OK) { ngx_mail_close_connection(c); return; } return; } s->blocked = 0; rc = ngx_mail_read_command(s, c); if (rc == NGX_AGAIN) { if (ngx_handle_read_event(c->read, 0) != NGX_OK) { ngx_mail_session_internal_server_error(s); return; } return; } if (rc == NGX_ERROR) { return; } ngx_str_set(&s->out, pop3_ok); if (rc == NGX_OK) { switch (s->mail_state) { case ngx_pop3_start: switch (s->command) { case NGX_POP3_USER: rc = ngx_mail_pop3_user(s, c); break; case NGX_POP3_CAPA: rc = ngx_mail_pop3_capa(s, c, 1); break; case NGX_POP3_APOP: rc = ngx_mail_pop3_apop(s, c); break; case NGX_POP3_AUTH: rc = ngx_mail_pop3_auth(s, c); break; case NGX_POP3_QUIT: s->quit = 1; break; case NGX_POP3_NOOP: break; case NGX_POP3_STLS: rc = ngx_mail_pop3_stls(s, c); break; default: rc = NGX_MAIL_PARSE_INVALID_COMMAND; break; } break; case ngx_pop3_user: switch (s->command) { case NGX_POP3_PASS: rc = ngx_mail_pop3_pass(s, c); break; case NGX_POP3_CAPA: rc = ngx_mail_pop3_capa(s, c, 0); break; case NGX_POP3_QUIT: s->quit = 1; break; case NGX_POP3_NOOP: break; default: rc = NGX_MAIL_PARSE_INVALID_COMMAND; break; } break; /* suppress warnings */ case ngx_pop3_passwd: break; case ngx_pop3_auth_login_username: rc = ngx_mail_auth_login_username(s, c, 0); ngx_str_set(&s->out, pop3_password); s->mail_state = ngx_pop3_auth_login_password; break; case ngx_pop3_auth_login_password: rc = ngx_mail_auth_login_password(s, c); break; case ngx_pop3_auth_plain: rc = ngx_mail_auth_plain(s, c, 0); break; case ngx_pop3_auth_cram_md5: rc = ngx_mail_auth_cram_md5(s, c); break; case ngx_pop3_auth_external: rc = ngx_mail_auth_external(s, c, 0); break; } } if (s->buffer->pos < s->buffer->last) { s->blocked = 1; } switch (rc) { case NGX_DONE: ngx_mail_auth(s, c); return; case NGX_ERROR: ngx_mail_session_internal_server_error(s); return; case NGX_MAIL_PARSE_INVALID_COMMAND: s->mail_state = ngx_pop3_start; s->state = 0; ngx_str_set(&s->out, pop3_invalid_command); /* fall through */ case NGX_OK: s->args.nelts = 0; if (s->buffer->pos == s->buffer->last) { s->buffer->pos = s->buffer->start; s->buffer->last = s->buffer->start; } if (s->state) { s->arg_start = s->buffer->pos; } if (ngx_handle_read_event(c->read, 0) != NGX_OK) { ngx_mail_session_internal_server_error(s); return; } ngx_mail_send(c->write); } } static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) { ngx_str_t *arg; #if (NGX_MAIL_SSL) if (ngx_mail_starttls_only(s, c)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } #endif if (s->args.nelts != 1) { return NGX_MAIL_PARSE_INVALID_COMMAND; } arg = s->args.elts; s->login.len = arg[0].len; s->login.data = ngx_pnalloc(c->pool, s->login.len); if (s->login.data == NULL) { return NGX_ERROR; } ngx_memcpy(s->login.data, arg[0].data, s->login.len); ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 login: \"%V\"", &s->login); s->mail_state = ngx_pop3_user; return NGX_OK; } static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) { ngx_str_t *arg; if (s->args.nelts != 1) { return NGX_MAIL_PARSE_INVALID_COMMAND; } arg = s->args.elts; s->passwd.len = arg[0].len; s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); if (s->passwd.data == NULL) { return NGX_ERROR; } ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); #if (NGX_DEBUG_MAIL_PASSWD) ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 passwd: \"%V\"", &s->passwd); #endif return NGX_DONE; } static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) { ngx_mail_pop3_srv_conf_t *pscf; pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); #if (NGX_MAIL_SSL) if (stls && c->ssl == NULL) { ngx_mail_ssl_conf_t *sslcf; sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { s->out = pscf->starttls_capability; return NGX_OK; } if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { s->out = pscf->starttls_only_capability; return NGX_OK; } } #endif s->out = pscf->capability; return NGX_OK; } static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) { #if (NGX_MAIL_SSL) ngx_mail_ssl_conf_t *sslcf; if (c->ssl == NULL) { sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); if (sslcf->starttls) { s->buffer->pos = s->buffer->start; s->buffer->last = s->buffer->start; c->read->handler = ngx_mail_starttls_handler; return NGX_OK; } } #endif return NGX_MAIL_PARSE_INVALID_COMMAND; } static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) { ngx_str_t *arg; ngx_mail_pop3_srv_conf_t *pscf; #if (NGX_MAIL_SSL) if (ngx_mail_starttls_only(s, c)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } #endif if (s->args.nelts != 2) { return NGX_MAIL_PARSE_INVALID_COMMAND; } pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); if (!(pscf->auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } arg = s->args.elts; s->login.len = arg[0].len; s->login.data = ngx_pnalloc(c->pool, s->login.len); if (s->login.data == NULL) { return NGX_ERROR; } ngx_memcpy(s->login.data, arg[0].data, s->login.len); s->passwd.len = arg[1].len; s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); if (s->passwd.data == NULL) { return NGX_ERROR; } ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); s->auth_method = NGX_MAIL_AUTH_APOP; return NGX_DONE; } static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) { ngx_int_t rc; ngx_mail_pop3_srv_conf_t *pscf; #if (NGX_MAIL_SSL) if (ngx_mail_starttls_only(s, c)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } #endif pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); if (s->args.nelts == 0) { s->out = pscf->auth_capability; s->state = 0; return NGX_OK; } rc = ngx_mail_auth_parse(s, c); switch (rc) { case NGX_MAIL_AUTH_LOGIN: ngx_str_set(&s->out, pop3_username); s->mail_state = ngx_pop3_auth_login_username; return NGX_OK; case NGX_MAIL_AUTH_LOGIN_USERNAME: ngx_str_set(&s->out, pop3_password); s->mail_state = ngx_pop3_auth_login_password; return ngx_mail_auth_login_username(s, c, 1); case NGX_MAIL_AUTH_PLAIN: ngx_str_set(&s->out, pop3_next); s->mail_state = ngx_pop3_auth_plain; return NGX_OK; case NGX_MAIL_AUTH_CRAM_MD5: if (!(pscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { s->mail_state = ngx_pop3_auth_cram_md5; return NGX_OK; } return NGX_ERROR; case NGX_MAIL_AUTH_EXTERNAL: if (!(pscf->auth_methods & NGX_MAIL_AUTH_EXTERNAL_ENABLED)) { return NGX_MAIL_PARSE_INVALID_COMMAND; } ngx_str_set(&s->out, pop3_username); s->mail_state = ngx_pop3_auth_external; return NGX_OK; } return rc; }