Mercurial > hg > nginx-quic
view src/stream/ngx_stream_script.c @ 6774:bcb107bb89cd
Mail: support SASL EXTERNAL (RFC 4422).
This is needed to allow TLS client certificate auth to work. With
ssl_verify_client configured, the auth daemon can choose to allow the
connection to proceed based on the certificate data.
This has been tested with Thunderbird for IMAP only. I've not yet found a
client that will do client certificate auth for POP3 or SMTP, and the method is
not really documented anywhere that I can find. That said, its simple enough
that the way I've done is probably right.
author | Rob N ★ <robn@fastmail.com> |
---|---|
date | Sat, 08 Oct 2016 18:05:00 +1100 |
parents | 0125b151c9a5 |
children | 39ff6939266e |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> static ngx_int_t ngx_stream_script_init_arrays( ngx_stream_script_compile_t *sc); static ngx_int_t ngx_stream_script_done(ngx_stream_script_compile_t *sc); static ngx_int_t ngx_stream_script_add_copy_code( ngx_stream_script_compile_t *sc, ngx_str_t *value, ngx_uint_t last); static ngx_int_t ngx_stream_script_add_var_code( ngx_stream_script_compile_t *sc, ngx_str_t *name); #if (NGX_PCRE) static ngx_int_t ngx_stream_script_add_capture_code( ngx_stream_script_compile_t *sc, ngx_uint_t n); #endif static ngx_int_t ngx_stream_script_add_full_name_code( ngx_stream_script_compile_t *sc); static size_t ngx_stream_script_full_name_len_code( ngx_stream_script_engine_t *e); static void ngx_stream_script_full_name_code(ngx_stream_script_engine_t *e); #define ngx_stream_script_exit (u_char *) &ngx_stream_script_exit_code static uintptr_t ngx_stream_script_exit_code = (uintptr_t) NULL; void ngx_stream_script_flush_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val) { ngx_uint_t *index; index = val->flushes; if (index) { while (*index != (ngx_uint_t) -1) { if (s->variables[*index].no_cacheable) { s->variables[*index].valid = 0; s->variables[*index].not_found = 0; } index++; } } } ngx_int_t ngx_stream_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val, ngx_str_t *value) { size_t len; ngx_stream_script_code_pt code; ngx_stream_script_engine_t e; ngx_stream_script_len_code_pt lcode; if (val->lengths == NULL) { *value = val->value; return NGX_OK; } ngx_stream_script_flush_complex_value(s, val); ngx_memzero(&e, sizeof(ngx_stream_script_engine_t)); e.ip = val->lengths; e.session = s; e.flushed = 1; len = 0; while (*(uintptr_t *) e.ip) { lcode = *(ngx_stream_script_len_code_pt *) e.ip; len += lcode(&e); } value->len = len; value->data = ngx_pnalloc(s->connection->pool, len); if (value->data == NULL) { return NGX_ERROR; } e.ip = val->values; e.pos = value->data; e.buf = *value; while (*(uintptr_t *) e.ip) { code = *(ngx_stream_script_code_pt *) e.ip; code((ngx_stream_script_engine_t *) &e); } *value = e.buf; return NGX_OK; } ngx_int_t ngx_stream_compile_complex_value(ngx_stream_compile_complex_value_t *ccv) { ngx_str_t *v; ngx_uint_t i, n, nv, nc; ngx_array_t flushes, lengths, values, *pf, *pl, *pv; ngx_stream_script_compile_t sc; v = ccv->value; nv = 0; nc = 0; for (i = 0; i < v->len; i++) { if (v->data[i] == '$') { if (v->data[i + 1] >= '1' && v->data[i + 1] <= '9') { nc++; } else { nv++; } } } if ((v->len == 0 || v->data[0] != '$') && (ccv->conf_prefix || ccv->root_prefix)) { if (ngx_conf_full_name(ccv->cf->cycle, v, ccv->conf_prefix) != NGX_OK) { return NGX_ERROR; } ccv->conf_prefix = 0; ccv->root_prefix = 0; } ccv->complex_value->value = *v; ccv->complex_value->flushes = NULL; ccv->complex_value->lengths = NULL; ccv->complex_value->values = NULL; if (nv == 0 && nc == 0) { return NGX_OK; } n = nv + 1; if (ngx_array_init(&flushes, ccv->cf->pool, n, sizeof(ngx_uint_t)) != NGX_OK) { return NGX_ERROR; } n = nv * (2 * sizeof(ngx_stream_script_copy_code_t) + sizeof(ngx_stream_script_var_code_t)) + sizeof(uintptr_t); if (ngx_array_init(&lengths, ccv->cf->pool, n, 1) != NGX_OK) { return NGX_ERROR; } n = (nv * (2 * sizeof(ngx_stream_script_copy_code_t) + sizeof(ngx_stream_script_var_code_t)) + sizeof(uintptr_t) + v->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); if (ngx_array_init(&values, ccv->cf->pool, n, 1) != NGX_OK) { return NGX_ERROR; } pf = &flushes; pl = &lengths; pv = &values; ngx_memzero(&sc, sizeof(ngx_stream_script_compile_t)); sc.cf = ccv->cf; sc.source = v; sc.flushes = &pf; sc.lengths = &pl; sc.values = &pv; sc.complete_lengths = 1; sc.complete_values = 1; sc.zero = ccv->zero; sc.conf_prefix = ccv->conf_prefix; sc.root_prefix = ccv->root_prefix; if (ngx_stream_script_compile(&sc) != NGX_OK) { return NGX_ERROR; } if (flushes.nelts) { ccv->complex_value->flushes = flushes.elts; ccv->complex_value->flushes[flushes.nelts] = (ngx_uint_t) -1; } ccv->complex_value->lengths = lengths.elts; ccv->complex_value->values = values.elts; return NGX_OK; } char * ngx_stream_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *p = conf; ngx_str_t *value; ngx_stream_complex_value_t **cv; ngx_stream_compile_complex_value_t ccv; cv = (ngx_stream_complex_value_t **) (p + cmd->offset); if (*cv != NULL) { return "duplicate"; } *cv = ngx_palloc(cf->pool, sizeof(ngx_stream_complex_value_t)); if (*cv == NULL) { return NGX_CONF_ERROR; } value = cf->args->elts; ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t)); ccv.cf = cf; ccv.value = &value[1]; ccv.complex_value = *cv; if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } ngx_uint_t ngx_stream_script_variables_count(ngx_str_t *value) { ngx_uint_t i, n; for (n = 0, i = 0; i < value->len; i++) { if (value->data[i] == '$') { n++; } } return n; } ngx_int_t ngx_stream_script_compile(ngx_stream_script_compile_t *sc) { u_char ch; ngx_str_t name; ngx_uint_t i, bracket; if (ngx_stream_script_init_arrays(sc) != NGX_OK) { return NGX_ERROR; } for (i = 0; i < sc->source->len; /* void */ ) { name.len = 0; if (sc->source->data[i] == '$') { if (++i == sc->source->len) { goto invalid_variable; } if (sc->source->data[i] >= '1' && sc->source->data[i] <= '9') { #if (NGX_PCRE) ngx_uint_t n; n = sc->source->data[i] - '0'; if (ngx_stream_script_add_capture_code(sc, n) != NGX_OK) { return NGX_ERROR; } i++; continue; #else ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, "using variable \"$%c\" requires " "PCRE library", sc->source->data[i]); return NGX_ERROR; #endif } if (sc->source->data[i] == '{') { bracket = 1; if (++i == sc->source->len) { goto invalid_variable; } name.data = &sc->source->data[i]; } else { bracket = 0; name.data = &sc->source->data[i]; } for ( /* void */ ; i < sc->source->len; i++, name.len++) { ch = sc->source->data[i]; if (ch == '}' && bracket) { i++; bracket = 0; break; } if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9') || ch == '_') { continue; } break; } if (bracket) { ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, "the closing bracket in \"%V\" " "variable is missing", &name); return NGX_ERROR; } if (name.len == 0) { goto invalid_variable; } sc->variables++; if (ngx_stream_script_add_var_code(sc, &name) != NGX_OK) { return NGX_ERROR; } continue; } name.data = &sc->source->data[i]; while (i < sc->source->len) { if (sc->source->data[i] == '$') { break; } i++; name.len++; } sc->size += name.len; if (ngx_stream_script_add_copy_code(sc, &name, (i == sc->source->len)) != NGX_OK) { return NGX_ERROR; } } return ngx_stream_script_done(sc); invalid_variable: ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, "invalid variable name"); return NGX_ERROR; } u_char * ngx_stream_script_run(ngx_stream_session_t *s, ngx_str_t *value, void *code_lengths, size_t len, void *code_values) { ngx_uint_t i; ngx_stream_script_code_pt code; ngx_stream_script_engine_t e; ngx_stream_core_main_conf_t *cmcf; ngx_stream_script_len_code_pt lcode; cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); for (i = 0; i < cmcf->variables.nelts; i++) { if (s->variables[i].no_cacheable) { s->variables[i].valid = 0; s->variables[i].not_found = 0; } } ngx_memzero(&e, sizeof(ngx_stream_script_engine_t)); e.ip = code_lengths; e.session = s; e.flushed = 1; while (*(uintptr_t *) e.ip) { lcode = *(ngx_stream_script_len_code_pt *) e.ip; len += lcode(&e); } value->len = len; value->data = ngx_pnalloc(s->connection->pool, len); if (value->data == NULL) { return NULL; } e.ip = code_values; e.pos = value->data; while (*(uintptr_t *) e.ip) { code = *(ngx_stream_script_code_pt *) e.ip; code((ngx_stream_script_engine_t *) &e); } return e.pos; } void ngx_stream_script_flush_no_cacheable_variables(ngx_stream_session_t *s, ngx_array_t *indices) { ngx_uint_t n, *index; if (indices) { index = indices->elts; for (n = 0; n < indices->nelts; n++) { if (s->variables[index[n]].no_cacheable) { s->variables[index[n]].valid = 0; s->variables[index[n]].not_found = 0; } } } } static ngx_int_t ngx_stream_script_init_arrays(ngx_stream_script_compile_t *sc) { ngx_uint_t n; if (sc->flushes && *sc->flushes == NULL) { n = sc->variables ? sc->variables : 1; *sc->flushes = ngx_array_create(sc->cf->pool, n, sizeof(ngx_uint_t)); if (*sc->flushes == NULL) { return NGX_ERROR; } } if (*sc->lengths == NULL) { n = sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) + sizeof(ngx_stream_script_var_code_t)) + sizeof(uintptr_t); *sc->lengths = ngx_array_create(sc->cf->pool, n, 1); if (*sc->lengths == NULL) { return NGX_ERROR; } } if (*sc->values == NULL) { n = (sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) + sizeof(ngx_stream_script_var_code_t)) + sizeof(uintptr_t) + sc->source->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); *sc->values = ngx_array_create(sc->cf->pool, n, 1); if (*sc->values == NULL) { return NGX_ERROR; } } sc->variables = 0; return NGX_OK; } static ngx_int_t ngx_stream_script_done(ngx_stream_script_compile_t *sc) { ngx_str_t zero; uintptr_t *code; if (sc->zero) { zero.len = 1; zero.data = (u_char *) "\0"; if (ngx_stream_script_add_copy_code(sc, &zero, 0) != NGX_OK) { return NGX_ERROR; } } if (sc->conf_prefix || sc->root_prefix) { if (ngx_stream_script_add_full_name_code(sc) != NGX_OK) { return NGX_ERROR; } } if (sc->complete_lengths) { code = ngx_stream_script_add_code(*sc->lengths, sizeof(uintptr_t), NULL); if (code == NULL) { return NGX_ERROR; } *code = (uintptr_t) NULL; } if (sc->complete_values) { code = ngx_stream_script_add_code(*sc->values, sizeof(uintptr_t), &sc->main); if (code == NULL) { return NGX_ERROR; } *code = (uintptr_t) NULL; } return NGX_OK; } void * ngx_stream_script_add_code(ngx_array_t *codes, size_t size, void *code) { u_char *elts, **p; void *new; elts = codes->elts; new = ngx_array_push_n(codes, size); if (new == NULL) { return NULL; } if (code) { if (elts != codes->elts) { p = code; *p += (u_char *) codes->elts - elts; } } return new; } static ngx_int_t ngx_stream_script_add_copy_code(ngx_stream_script_compile_t *sc, ngx_str_t *value, ngx_uint_t last) { u_char *p; size_t size, len, zero; ngx_stream_script_copy_code_t *code; zero = (sc->zero && last); len = value->len + zero; code = ngx_stream_script_add_code(*sc->lengths, sizeof(ngx_stream_script_copy_code_t), NULL); if (code == NULL) { return NGX_ERROR; } code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_len_code; code->len = len; size = (sizeof(ngx_stream_script_copy_code_t) + len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); code = ngx_stream_script_add_code(*sc->values, size, &sc->main); if (code == NULL) { return NGX_ERROR; } code->code = ngx_stream_script_copy_code; code->len = len; p = ngx_cpymem((u_char *) code + sizeof(ngx_stream_script_copy_code_t), value->data, value->len); if (zero) { *p = '\0'; sc->zero = 0; } return NGX_OK; } size_t ngx_stream_script_copy_len_code(ngx_stream_script_engine_t *e) { ngx_stream_script_copy_code_t *code; code = (ngx_stream_script_copy_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_copy_code_t); return code->len; } void ngx_stream_script_copy_code(ngx_stream_script_engine_t *e) { u_char *p; ngx_stream_script_copy_code_t *code; code = (ngx_stream_script_copy_code_t *) e->ip; p = e->pos; if (!e->skip) { e->pos = ngx_copy(p, e->ip + sizeof(ngx_stream_script_copy_code_t), code->len); } e->ip += sizeof(ngx_stream_script_copy_code_t) + ((code->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1)); ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, "stream script copy: \"%*s\"", e->pos - p, p); } static ngx_int_t ngx_stream_script_add_var_code(ngx_stream_script_compile_t *sc, ngx_str_t *name) { ngx_int_t index, *p; ngx_stream_script_var_code_t *code; index = ngx_stream_get_variable_index(sc->cf, name); if (index == NGX_ERROR) { return NGX_ERROR; } if (sc->flushes) { p = ngx_array_push(*sc->flushes); if (p == NULL) { return NGX_ERROR; } *p = index; } code = ngx_stream_script_add_code(*sc->lengths, sizeof(ngx_stream_script_var_code_t), NULL); if (code == NULL) { return NGX_ERROR; } code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_var_len_code; code->index = (uintptr_t) index; code = ngx_stream_script_add_code(*sc->values, sizeof(ngx_stream_script_var_code_t), &sc->main); if (code == NULL) { return NGX_ERROR; } code->code = ngx_stream_script_copy_var_code; code->index = (uintptr_t) index; return NGX_OK; } size_t ngx_stream_script_copy_var_len_code(ngx_stream_script_engine_t *e) { ngx_stream_variable_value_t *value; ngx_stream_script_var_code_t *code; code = (ngx_stream_script_var_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_var_code_t); if (e->flushed) { value = ngx_stream_get_indexed_variable(e->session, code->index); } else { value = ngx_stream_get_flushed_variable(e->session, code->index); } if (value && !value->not_found) { return value->len; } return 0; } void ngx_stream_script_copy_var_code(ngx_stream_script_engine_t *e) { u_char *p; ngx_stream_variable_value_t *value; ngx_stream_script_var_code_t *code; code = (ngx_stream_script_var_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_var_code_t); if (!e->skip) { if (e->flushed) { value = ngx_stream_get_indexed_variable(e->session, code->index); } else { value = ngx_stream_get_flushed_variable(e->session, code->index); } if (value && !value->not_found) { p = e->pos; e->pos = ngx_copy(p, value->data, value->len); ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, "stream script var: \"%*s\"", e->pos - p, p); } } } #if (NGX_PCRE) static ngx_int_t ngx_stream_script_add_capture_code(ngx_stream_script_compile_t *sc, ngx_uint_t n) { ngx_stream_script_copy_capture_code_t *code; code = ngx_stream_script_add_code(*sc->lengths, sizeof(ngx_stream_script_copy_capture_code_t), NULL); if (code == NULL) { return NGX_ERROR; } code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_capture_len_code; code->n = 2 * n; code = ngx_stream_script_add_code(*sc->values, sizeof(ngx_stream_script_copy_capture_code_t), &sc->main); if (code == NULL) { return NGX_ERROR; } code->code = ngx_stream_script_copy_capture_code; code->n = 2 * n; if (sc->ncaptures < n) { sc->ncaptures = n; } return NGX_OK; } size_t ngx_stream_script_copy_capture_len_code(ngx_stream_script_engine_t *e) { int *cap; ngx_uint_t n; ngx_stream_session_t *s; ngx_stream_script_copy_capture_code_t *code; s = e->session; code = (ngx_stream_script_copy_capture_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_copy_capture_code_t); n = code->n; if (n < s->ncaptures) { cap = s->captures; return cap[n + 1] - cap[n]; } return 0; } void ngx_stream_script_copy_capture_code(ngx_stream_script_engine_t *e) { int *cap; u_char *p, *pos; ngx_uint_t n; ngx_stream_session_t *s; ngx_stream_script_copy_capture_code_t *code; s = e->session; code = (ngx_stream_script_copy_capture_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_copy_capture_code_t); n = code->n; pos = e->pos; if (n < s->ncaptures) { cap = s->captures; p = s->captures_data; e->pos = ngx_copy(pos, &p[cap[n]], cap[n + 1] - cap[n]); } ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, "stream script capture: \"%*s\"", e->pos - pos, pos); } #endif static ngx_int_t ngx_stream_script_add_full_name_code(ngx_stream_script_compile_t *sc) { ngx_stream_script_full_name_code_t *code; code = ngx_stream_script_add_code(*sc->lengths, sizeof(ngx_stream_script_full_name_code_t), NULL); if (code == NULL) { return NGX_ERROR; } code->code = (ngx_stream_script_code_pt) ngx_stream_script_full_name_len_code; code->conf_prefix = sc->conf_prefix; code = ngx_stream_script_add_code(*sc->values, sizeof(ngx_stream_script_full_name_code_t), &sc->main); if (code == NULL) { return NGX_ERROR; } code->code = ngx_stream_script_full_name_code; code->conf_prefix = sc->conf_prefix; return NGX_OK; } static size_t ngx_stream_script_full_name_len_code(ngx_stream_script_engine_t *e) { ngx_stream_script_full_name_code_t *code; code = (ngx_stream_script_full_name_code_t *) e->ip; e->ip += sizeof(ngx_stream_script_full_name_code_t); return code->conf_prefix ? ngx_cycle->conf_prefix.len: ngx_cycle->prefix.len; } static void ngx_stream_script_full_name_code(ngx_stream_script_engine_t *e) { ngx_stream_script_full_name_code_t *code; ngx_str_t value, *prefix; code = (ngx_stream_script_full_name_code_t *) e->ip; value.data = e->buf.data; value.len = e->pos - e->buf.data; prefix = code->conf_prefix ? (ngx_str_t *) &ngx_cycle->conf_prefix: (ngx_str_t *) &ngx_cycle->prefix; if (ngx_get_full_name(e->session->connection->pool, prefix, &value) != NGX_OK) { e->ip = ngx_stream_script_exit; return; } e->buf = value; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, "stream script fullname: \"%V\"", &value); e->ip += sizeof(ngx_stream_script_full_name_code_t); }