diff options
Diffstat (limited to 'app/nginx/src/mail/ngx_mail_ssl_module.c')
| -rw-r--r-- | app/nginx/src/mail/ngx_mail_ssl_module.c | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/app/nginx/src/mail/ngx_mail_ssl_module.c b/app/nginx/src/mail/ngx_mail_ssl_module.c new file mode 100644 index 0000000..fbc9bc7 --- /dev/null +++ b/app/nginx/src/mail/ngx_mail_ssl_module.c @@ -0,0 +1,661 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_mail.h> + + +#define NGX_DEFAULT_CIPHERS "HIGH:!aNULL:!MD5" +#define NGX_DEFAULT_ECDH_CURVE "auto" + + +static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf); +static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child); + +static char *ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static char *ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static char *ngx_mail_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); +static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, + void *conf); + + +static ngx_conf_enum_t ngx_mail_starttls_state[] = { + { ngx_string("off"), NGX_MAIL_STARTTLS_OFF }, + { ngx_string("on"), NGX_MAIL_STARTTLS_ON }, + { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY }, + { ngx_null_string, 0 } +}; + + + +static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = { + { ngx_string("SSLv2"), NGX_SSL_SSLv2 }, + { ngx_string("SSLv3"), NGX_SSL_SSLv3 }, + { ngx_string("TLSv1"), NGX_SSL_TLSv1 }, + { ngx_string("TLSv1.1"), NGX_SSL_TLSv1_1 }, + { ngx_string("TLSv1.2"), NGX_SSL_TLSv1_2 }, + { ngx_null_string, 0 } +}; + + +static ngx_conf_enum_t ngx_mail_ssl_verify[] = { + { ngx_string("off"), 0 }, + { ngx_string("on"), 1 }, + { ngx_string("optional"), 2 }, + { ngx_string("optional_no_ca"), 3 }, + { ngx_null_string, 0 } +}; + + +static ngx_command_t ngx_mail_ssl_commands[] = { + + { ngx_string("ssl"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, + ngx_mail_ssl_enable, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, enable), + NULL }, + + { ngx_string("starttls"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_mail_ssl_starttls, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, starttls), + ngx_mail_starttls_state }, + + { ngx_string("ssl_certificate"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_array_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, certificates), + NULL }, + + { ngx_string("ssl_certificate_key"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_array_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, certificate_keys), + NULL }, + + { ngx_string("ssl_password_file"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_mail_ssl_password_file, + NGX_MAIL_SRV_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("ssl_dhparam"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, dhparam), + NULL }, + + { ngx_string("ssl_ecdh_curve"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, ecdh_curve), + NULL }, + + { ngx_string("ssl_protocols"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, + ngx_conf_set_bitmask_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, protocols), + &ngx_mail_ssl_protocols }, + + { ngx_string("ssl_ciphers"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, ciphers), + NULL }, + + { ngx_string("ssl_prefer_server_ciphers"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers), + NULL }, + + { ngx_string("ssl_session_cache"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12, + ngx_mail_ssl_session_cache, + NGX_MAIL_SRV_CONF_OFFSET, + 0, + NULL }, + + { ngx_string("ssl_session_tickets"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, session_tickets), + NULL }, + + { ngx_string("ssl_session_ticket_key"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_array_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, session_ticket_keys), + NULL }, + + { ngx_string("ssl_session_timeout"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_sec_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, session_timeout), + NULL }, + + { ngx_string("ssl_verify_client"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_enum_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, verify), + &ngx_mail_ssl_verify }, + + { ngx_string("ssl_verify_depth"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_num_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, verify_depth), + NULL }, + + { ngx_string("ssl_client_certificate"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, client_certificate), + NULL }, + + { ngx_string("ssl_trusted_certificate"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, trusted_certificate), + NULL }, + + { ngx_string("ssl_crl"), + NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_MAIL_SRV_CONF_OFFSET, + offsetof(ngx_mail_ssl_conf_t, crl), + NULL }, + + ngx_null_command +}; + + +static ngx_mail_module_t ngx_mail_ssl_module_ctx = { + NULL, /* protocol */ + + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + ngx_mail_ssl_create_conf, /* create server configuration */ + ngx_mail_ssl_merge_conf /* merge server configuration */ +}; + + +ngx_module_t ngx_mail_ssl_module = { + NGX_MODULE_V1, + &ngx_mail_ssl_module_ctx, /* module context */ + ngx_mail_ssl_commands, /* module directives */ + NGX_MAIL_MODULE, /* module type */ + NULL, /* init master */ + NULL, /* init module */ + NULL, /* init process */ + NULL, /* init thread */ + NULL, /* exit thread */ + NULL, /* exit process */ + NULL, /* exit master */ + NGX_MODULE_V1_PADDING +}; + + +static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL"); + + +static void * +ngx_mail_ssl_create_conf(ngx_conf_t *cf) +{ + ngx_mail_ssl_conf_t *scf; + + scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t)); + if (scf == NULL) { + return NULL; + } + + /* + * set by ngx_pcalloc(): + * + * scf->protocols = 0; + * scf->dhparam = { 0, NULL }; + * scf->ecdh_curve = { 0, NULL }; + * scf->client_certificate = { 0, NULL }; + * scf->trusted_certificate = { 0, NULL }; + * scf->crl = { 0, NULL }; + * scf->ciphers = { 0, NULL }; + * scf->shm_zone = NULL; + */ + + scf->enable = NGX_CONF_UNSET; + scf->starttls = NGX_CONF_UNSET_UINT; + scf->certificates = NGX_CONF_UNSET_PTR; + scf->certificate_keys = NGX_CONF_UNSET_PTR; + scf->passwords = NGX_CONF_UNSET_PTR; + scf->prefer_server_ciphers = NGX_CONF_UNSET; + scf->verify = NGX_CONF_UNSET_UINT; + scf->verify_depth = NGX_CONF_UNSET_UINT; + scf->builtin_session_cache = NGX_CONF_UNSET; + scf->session_timeout = NGX_CONF_UNSET; + scf->session_tickets = NGX_CONF_UNSET; + scf->session_ticket_keys = NGX_CONF_UNSET_PTR; + + return scf; +} + + +static char * +ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_mail_ssl_conf_t *prev = parent; + ngx_mail_ssl_conf_t *conf = child; + + char *mode; + ngx_pool_cleanup_t *cln; + + ngx_conf_merge_value(conf->enable, prev->enable, 0); + ngx_conf_merge_uint_value(conf->starttls, prev->starttls, + NGX_MAIL_STARTTLS_OFF); + + ngx_conf_merge_value(conf->session_timeout, + prev->session_timeout, 300); + + ngx_conf_merge_value(conf->prefer_server_ciphers, + prev->prefer_server_ciphers, 0); + + ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols, + (NGX_CONF_BITMASK_SET|NGX_SSL_TLSv1 + |NGX_SSL_TLSv1_1|NGX_SSL_TLSv1_2)); + + ngx_conf_merge_uint_value(conf->verify, prev->verify, 0); + ngx_conf_merge_uint_value(conf->verify_depth, prev->verify_depth, 1); + + ngx_conf_merge_ptr_value(conf->certificates, prev->certificates, NULL); + ngx_conf_merge_ptr_value(conf->certificate_keys, prev->certificate_keys, + NULL); + + ngx_conf_merge_ptr_value(conf->passwords, prev->passwords, NULL); + + ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, ""); + + ngx_conf_merge_str_value(conf->ecdh_curve, prev->ecdh_curve, + NGX_DEFAULT_ECDH_CURVE); + + ngx_conf_merge_str_value(conf->client_certificate, + prev->client_certificate, ""); + ngx_conf_merge_str_value(conf->trusted_certificate, + prev->trusted_certificate, ""); + ngx_conf_merge_str_value(conf->crl, prev->crl, ""); + + ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS); + + + conf->ssl.log = cf->log; + + if (conf->enable) { + mode = "ssl"; + + } else if (conf->starttls != NGX_MAIL_STARTTLS_OFF) { + mode = "starttls"; + + } else { + mode = ""; + } + + if (conf->file == NULL) { + conf->file = prev->file; + conf->line = prev->line; + } + + if (*mode) { + + if (conf->certificates == NULL) { + ngx_log_error(NGX_LOG_EMERG, cf->log, 0, + "no \"ssl_certificate\" is defined for " + "the \"%s\" directive in %s:%ui", + mode, conf->file, conf->line); + return NGX_CONF_ERROR; + } + + if (conf->certificate_keys == NULL) { + ngx_log_error(NGX_LOG_EMERG, cf->log, 0, + "no \"ssl_certificate_key\" is defined for " + "the \"%s\" directive in %s:%ui", + mode, conf->file, conf->line); + return NGX_CONF_ERROR; + } + + if (conf->certificate_keys->nelts < conf->certificates->nelts) { + ngx_log_error(NGX_LOG_EMERG, cf->log, 0, + "no \"ssl_certificate_key\" is defined " + "for certificate \"%V\" and " + "the \"ssl\" directive in %s:%ui", + ((ngx_str_t *) conf->certificates->elts) + + conf->certificates->nelts - 1, + conf->file, conf->line); + return NGX_CONF_ERROR; + } + + } else { + + if (conf->certificates == NULL) { + return NGX_CONF_OK; + } + + if (conf->certificate_keys == NULL + || conf->certificate_keys->nelts < conf->certificates->nelts) + { + ngx_log_error(NGX_LOG_EMERG, cf->log, 0, + "no \"ssl_certificate_key\" is defined " + "for certificate \"%V\"", + ((ngx_str_t *) conf->certificates->elts) + + conf->certificates->nelts - 1); + return NGX_CONF_ERROR; + } + } + + if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) { + return NGX_CONF_ERROR; + } + + cln = ngx_pool_cleanup_add(cf->pool, 0); + if (cln == NULL) { + return NGX_CONF_ERROR; + } + + cln->handler = ngx_ssl_cleanup_ctx; + cln->data = &conf->ssl; + + if (ngx_ssl_certificates(cf, &conf->ssl, conf->certificates, + conf->certificate_keys, conf->passwords) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + if (conf->verify) { + + if (conf->client_certificate.len == 0 && conf->verify != 3) { + ngx_log_error(NGX_LOG_EMERG, cf->log, 0, + "no ssl_client_certificate for ssl_client_verify"); + return NGX_CONF_ERROR; + } + + if (ngx_ssl_client_certificate(cf, &conf->ssl, + &conf->client_certificate, + conf->verify_depth) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + if (ngx_ssl_trusted_certificate(cf, &conf->ssl, + &conf->trusted_certificate, + conf->verify_depth) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != NGX_OK) { + return NGX_CONF_ERROR; + } + } + + if (ngx_ssl_ciphers(cf, &conf->ssl, &conf->ciphers, + conf->prefer_server_ciphers) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) { + return NGX_CONF_ERROR; + } + + if (ngx_ssl_ecdh_curve(cf, &conf->ssl, &conf->ecdh_curve) != NGX_OK) { + return NGX_CONF_ERROR; + } + + ngx_conf_merge_value(conf->builtin_session_cache, + prev->builtin_session_cache, NGX_SSL_NONE_SCACHE); + + if (conf->shm_zone == NULL) { + conf->shm_zone = prev->shm_zone; + } + + if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx, + conf->builtin_session_cache, + conf->shm_zone, conf->session_timeout) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + ngx_conf_merge_value(conf->session_tickets, + prev->session_tickets, 1); + +#ifdef SSL_OP_NO_TICKET + if (!conf->session_tickets) { + SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_NO_TICKET); + } +#endif + + ngx_conf_merge_ptr_value(conf->session_ticket_keys, + prev->session_ticket_keys, NULL); + + if (ngx_ssl_session_ticket_keys(cf, &conf->ssl, conf->session_ticket_keys) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + return NGX_CONF_OK; +} + + +static char * +ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_mail_ssl_conf_t *scf = conf; + + char *rv; + + rv = ngx_conf_set_flag_slot(cf, cmd, conf); + + if (rv != NGX_CONF_OK) { + return rv; + } + + if (scf->enable && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "\"starttls\" directive conflicts with \"ssl on\""); + return NGX_CONF_ERROR; + } + + scf->file = cf->conf_file->file.name.data; + scf->line = cf->conf_file->line; + + return NGX_CONF_OK; +} + + +static char * +ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_mail_ssl_conf_t *scf = conf; + + char *rv; + + rv = ngx_conf_set_enum_slot(cf, cmd, conf); + + if (rv != NGX_CONF_OK) { + return rv; + } + + if (scf->enable == 1 && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "\"ssl\" directive conflicts with \"starttls\""); + return NGX_CONF_ERROR; + } + + scf->file = cf->conf_file->file.name.data; + scf->line = cf->conf_file->line; + + return NGX_CONF_OK; +} + + +static char * +ngx_mail_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_mail_ssl_conf_t *scf = conf; + + ngx_str_t *value; + + if (scf->passwords != NGX_CONF_UNSET_PTR) { + return "is duplicate"; + } + + value = cf->args->elts; + + scf->passwords = ngx_ssl_read_password_file(cf, &value[1]); + + if (scf->passwords == NULL) { + return NGX_CONF_ERROR; + } + + return NGX_CONF_OK; +} + + +static char * +ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + ngx_mail_ssl_conf_t *scf = conf; + + size_t len; + ngx_str_t *value, name, size; + ngx_int_t n; + ngx_uint_t i, j; + + value = cf->args->elts; + + for (i = 1; i < cf->args->nelts; i++) { + + if (ngx_strcmp(value[i].data, "off") == 0) { + scf->builtin_session_cache = NGX_SSL_NO_SCACHE; + continue; + } + + if (ngx_strcmp(value[i].data, "none") == 0) { + scf->builtin_session_cache = NGX_SSL_NONE_SCACHE; + continue; + } + + if (ngx_strcmp(value[i].data, "builtin") == 0) { + scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE; + continue; + } + + if (value[i].len > sizeof("builtin:") - 1 + && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1) + == 0) + { + n = ngx_atoi(value[i].data + sizeof("builtin:") - 1, + value[i].len - (sizeof("builtin:") - 1)); + + if (n == NGX_ERROR) { + goto invalid; + } + + scf->builtin_session_cache = n; + + continue; + } + + if (value[i].len > sizeof("shared:") - 1 + && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1) + == 0) + { + len = 0; + + for (j = sizeof("shared:") - 1; j < value[i].len; j++) { + if (value[i].data[j] == ':') { + break; + } + + len++; + } + + if (len == 0) { + goto invalid; + } + + name.len = len; + name.data = value[i].data + sizeof("shared:") - 1; + + size.len = value[i].len - j - 1; + size.data = name.data + len + 1; + + n = ngx_parse_size(&size); + + if (n == NGX_ERROR) { + goto invalid; + } + + if (n < (ngx_int_t) (8 * ngx_pagesize)) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "session cache \"%V\" is too small", + &value[i]); + + return NGX_CONF_ERROR; + } + + scf->shm_zone = ngx_shared_memory_add(cf, &name, n, + &ngx_mail_ssl_module); + if (scf->shm_zone == NULL) { + return NGX_CONF_ERROR; + } + + scf->shm_zone->init = ngx_ssl_session_cache_init; + + continue; + } + + goto invalid; + } + + if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) { + scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE; + } + + return NGX_CONF_OK; + +invalid: + + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "invalid session cache \"%V\"", &value[i]); + + return NGX_CONF_ERROR; +} |