| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| |
| |
| typedef struct { |
| ngx_uint_t engine; /* unsigned engine:1; */ |
| } ngx_openssl_conf_t; |
| |
| |
| 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_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); |
| |
| 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, |
| 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 |
| |
| 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_stapling_index; |
| |
| |
| ngx_int_t |
| ngx_ssl_init(ngx_log_t *log) |
| { |
| OPENSSL_config(NULL); |
| |
| SSL_library_init(); |
| SSL_load_error_strings(); |
| |
| OpenSSL_add_all_algorithms(); |
| |
| #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_stapling_index = SSL_CTX_get_ex_new_index(0, NULL, NULL, NULL, |
| NULL); |
| if (ngx_ssl_stapling_index == -1) { |
| ngx_ssl_error(NGX_LOG_ALERT, log, 0, |
| "SSL_CTX_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; |
| } |
| |
| ssl->buffer_size = NGX_SSL_BUFSIZE; |
| |
| /* client side options */ |
| |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_SESS_ID_BUG); |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_NETSCAPE_CHALLENGE_BUG); |
| |
| /* server side options */ |
| |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG); |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER); |
| |
| #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 |
| |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_SSLEAY_080_CLIENT_DH_BUG); |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_D5_BUG); |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_TLS_BLOCK_PADDING_BUG); |
| |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); |
| |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_SINGLE_DH_USE); |
| |
| 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 |
| if (!(protocols & NGX_SSL_TLSv1_1)) { |
| SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_TLSv1_1); |
| } |
| #endif |
| #ifdef 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_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 |
| |
| 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_certificate(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *cert, |
| ngx_str_t *key) |
| { |
| BIO *bio; |
| X509 *x509; |
| u_long n; |
| |
| 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 (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; |
| } |
| |
| X509_free(x509); |
| |
| /* 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; |
| } |
| |
| 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; |
| } |
| } |
| |
| BIO_free(bio); |
| |
| if (ngx_conf_full_name(cf->cycle, key, 1) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| if (SSL_CTX_use_PrivateKey_file(ssl->ctx, (char *) key->data, |
| SSL_FILETYPE_PEM) |
| == 0) |
| { |
| ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, |
| "SSL_CTX_use_PrivateKey_file(\"%s\") failed", key->data); |
| return NGX_ERROR; |
| } |
| |
| 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) { |
| 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) { |
| if (key == NULL) { |
| key = RSA_generate_key(512, RSA_F4, NULL, NULL); |
| } |
| } |
| |
| return key; |
| } |
| |
| |
| ngx_int_t |
| ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file) |
| { |
| DH *dh; |
| BIO *bio; |
| |
| /* |
| * -----BEGIN DH PARAMETERS----- |
| * MIGHAoGBALu8LcrYRnSQfEP89YDpz9vZWKP1aLQtSwju1OsPs1BMbAMCducQgAxc |
| * y7qokiYUxb7spWWl/fHSh6K8BJvmd4Bg6RqSp1fjBI9osHb302zI8pul34HcLKcl |
| * 7OZicMyaUDXYzs7vnqAnSmOrHlj6/UmI0PZdFGdX2gcd8EXP4WubAgEC |
| * -----END DH PARAMETERS----- |
| */ |
| |
| static unsigned char dh1024_p[] = { |
| 0xBB, 0xBC, 0x2D, 0xCA, 0xD8, 0x46, 0x74, 0x90, 0x7C, 0x43, 0xFC, 0xF5, |
| 0x80, 0xE9, 0xCF, 0xDB, 0xD9, 0x58, 0xA3, 0xF5, 0x68, 0xB4, 0x2D, 0x4B, |
| 0x08, 0xEE, 0xD4, 0xEB, 0x0F, 0xB3, 0x50, 0x4C, 0x6C, 0x03, 0x02, 0x76, |
| 0xE7, 0x10, 0x80, 0x0C, 0x5C, 0xCB, 0xBA, 0xA8, 0x92, 0x26, 0x14, 0xC5, |
| 0xBE, 0xEC, 0xA5, 0x65, 0xA5, 0xFD, 0xF1, 0xD2, 0x87, 0xA2, 0xBC, 0x04, |
| 0x9B, 0xE6, 0x77, 0x80, 0x60, 0xE9, 0x1A, 0x92, 0xA7, 0x57, 0xE3, 0x04, |
| 0x8F, 0x68, 0xB0, 0x76, 0xF7, 0xD3, 0x6C, 0xC8, 0xF2, 0x9B, 0xA5, 0xDF, |
| 0x81, 0xDC, 0x2C, 0xA7, 0x25, 0xEC, 0xE6, 0x62, 0x70, 0xCC, 0x9A, 0x50, |
| 0x35, 0xD8, 0xCE, 0xCE, 0xEF, 0x9E, 0xA0, 0x27, 0x4A, 0x63, 0xAB, 0x1E, |
| 0x58, 0xFA, 0xFD, 0x49, 0x88, 0xD0, 0xF6, 0x5D, 0x14, 0x67, 0x57, 0xDA, |
| 0x07, 0x1D, 0xF0, 0x45, 0xCF, 0xE1, 0x6B, 0x9B |
| }; |
| |
| static unsigned char dh1024_g[] = { 0x02 }; |
| |
| |
| if (file->len == 0) { |
| |
| dh = DH_new(); |
| if (dh == NULL) { |
| ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "DH_new() failed"); |
| return NGX_ERROR; |
| } |
| |
| dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL); |
| dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL); |
| |
| if (dh->p == NULL || dh->g == NULL) { |
| ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, "BN_bin2bn() failed"); |
| DH_free(dh); |
| return NGX_ERROR; |
| } |
| |
| SSL_CTX_set_tmp_dh(ssl->ctx, dh); |
| |
| DH_free(dh); |
| |
| 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 |
| int nid; |
| EC_KEY *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. |
| */ |
| |
| nid = OBJ_sn2nid((const char *) name->data); |
| if (nid == 0) { |
| ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, |
| "Unknown curve name \"%s\"", name->data); |
| return NGX_ERROR; |
| } |
| |
| ecdh = EC_KEY_new_by_curve_name(nid); |
| if (ecdh == NULL) { |
| ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0, |
| "Unable to create curve \"%s\"", name->data); |
| 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 |
| |
| 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->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; |
| |
| /* initial handshake done, disable renegotiation (CVE-2009-3555) */ |
| if (c->ssl->connection->s3) { |
| c->ssl->connection->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS; |
| } |
| |
| 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_log_error(NGX_LOG_INFO, c->log, 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) |
| { |
| u_char *last; |
| ssize_t n, bytes; |
| ngx_buf_t *b; |
| |
| bytes = 0; |
| |
| b = cl->buf; |
| last = b->last; |
| |
| for ( ;; ) { |
| |
| n = ngx_ssl_recv(c, last, b->end - last); |
| |
| 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; |
| c->sent += 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: %d", 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; |
| c->sent += 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: %d", 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); |
| } |
| |
| 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 (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; |
| |
| /* SSL_shutdown() never returns -1, on error it returns 0 */ |
| |
| 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 */ |
| || n == SSL_R_NO_CIPHERS_PASSED /* 182 */ |
| || 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 |
| || n == 1000 /* SSL_R_SSLV3_ALERT_CLOSE_NOTIFY */ |
| || 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 */ |
| { |
| 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; |
| } |
| |
| if (p >= last) { |
| 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)", 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 (builtin_session_cache == NGX_SSL_NO_SCACHE) { |
| SSL_CTX_set_session_cache_mode(ssl->ctx, SSL_SESS_CACHE_OFF); |
| return NGX_OK; |
| } |
| |
| SSL_CTX_set_session_id_context(ssl->ctx, sess_ctx->data, sess_ctx->len); |
| |
| 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; |
| } |
| |
| |
| 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; |
| uint32_t hash; |
| SSL_CTX *ssl_ctx; |
| 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 = SSL_get_SSL_CTX(ssl_conn); |
| 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 (NGX_PTR_SIZE == 8) |
| |
| id = sess_id->sess_id; |
| |
| #else |
| |
| id = ngx_slab_alloc_locked(shpool, sess->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, sess->session_id_length); |
| |
| if (id == NULL) { |
| goto failed; |
| } |
| } |
| |
| #endif |
| |
| ngx_memcpy(cached_sess, buf, len); |
| |
| ngx_memcpy(id, sess->session_id, sess->session_id_length); |
| |
| hash = ngx_crc32_short(sess->session_id, sess->session_id_length); |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| "ssl new session: %08XD:%d:%d", |
| hash, sess->session_id_length, len); |
| |
| sess_id->node.key = hash; |
| sess_id->node.data = (u_char) sess->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, 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]; |
| #if (NGX_DEBUG) |
| ngx_connection_t *c; |
| #endif |
| |
| hash = ngx_crc32_short(id, (size_t) len); |
| *copy = 0; |
| |
| #if (NGX_DEBUG) |
| c = ngx_ssl_get_connection(ssl_conn); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, |
| "ssl get session: %08XD:%d", hash, len); |
| #endif |
| |
| shm_zone = SSL_CTX_get_ex_data(SSL_get_SSL_CTX(ssl_conn), |
| 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(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) |
| { |
| size_t len; |
| u_char *id; |
| 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_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; |
| |
| id = sess->session_id; |
| len = (size_t) sess->session_id_length; |
| |
| hash = ngx_crc32_short(id, len); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, |
| "ssl remove session: %08XD:%uz", 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[48]; |
| 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, 0, 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; |
| } |
| |
| if (ngx_file_size(&fi) != 48) { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "\"%V\" must be 48 bytes", &file.name); |
| goto failed; |
| } |
| |
| n = ngx_read_file(&file, buf, 48, 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 (n != 48) { |
| ngx_conf_log_error(NGX_LOG_CRIT, cf, 0, |
| ngx_read_file_n " \"%V\" returned only " |
| "%z bytes instead of 48", &file.name, n); |
| goto failed; |
| } |
| |
| key = ngx_array_push(keys); |
| if (key == NULL) { |
| goto failed; |
| } |
| |
| ngx_memcpy(key->name, buf, 16); |
| ngx_memcpy(key->aes_key, buf + 16, 16); |
| ngx_memcpy(key->hmac_key, buf + 32, 16); |
| |
| 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; |
| } |
| |
| |
| #ifdef OPENSSL_NO_SHA256 |
| #define ngx_ssl_session_ticket_md EVP_sha1 |
| #else |
| #define ngx_ssl_session_ticket_md EVP_sha256 |
| #endif |
| |
| |
| 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) |
| { |
| SSL_CTX *ssl_ctx; |
| ngx_uint_t i; |
| ngx_array_t *keys; |
| ngx_ssl_session_ticket_key_t *key; |
| #if (NGX_DEBUG) |
| u_char buf[32]; |
| ngx_connection_t *c; |
| #endif |
| |
| ssl_ctx = SSL_get_SSL_CTX(ssl_conn); |
| |
| keys = SSL_CTX_get_ex_data(ssl_ctx, ngx_ssl_session_ticket_keys_index); |
| if (keys == NULL) { |
| return -1; |
| } |
| |
| key = keys->elts; |
| |
| #if (NGX_DEBUG) |
| c = ngx_ssl_get_connection(ssl_conn); |
| #endif |
| |
| if (enc == 1) { |
| /* encrypt session ticket */ |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_HTTP, 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"); |
| |
| RAND_pseudo_bytes(iv, 16); |
| EVP_EncryptInit_ex(ectx, EVP_aes_128_cbc(), NULL, key[0].aes_key, iv); |
| HMAC_Init_ex(hctx, key[0].hmac_key, 16, |
| ngx_ssl_session_ticket_md(), NULL); |
| memcpy(name, key[0].name, 16); |
| |
| return 0; |
| |
| } 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_HTTP, 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_HTTP, c->log, 0, |
| "ssl session ticket decrypt, key: \"%*s\"%s", |
| ngx_hex_dump(buf, key[i].name, 16) - buf, buf, |
| (i == 0) ? " (default)" : ""); |
| |
| HMAC_Init_ex(hctx, key[i].hmac_key, 16, |
| ngx_ssl_session_ticket_md(), NULL); |
| EVP_DecryptInit_ex(ectx, EVP_aes_128_cbc(), NULL, key[i].aes_key, iv); |
| |
| 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_keys\" ignored, not supported"); |
| } |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| void |
| ngx_ssl_cleanup_ctx(void *data) |
| { |
| ngx_ssl_t *ssl = data; |
| |
| SSL_CTX_free(ssl->ctx); |
| } |
| |
| |
| 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_session_id(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) |
| { |
| int len; |
| u_char *buf; |
| SSL_SESSION *sess; |
| |
| sess = SSL_get0_session(c->ssl->connection); |
| if (sess == NULL) { |
| s->len = 0; |
| return NGX_OK; |
| } |
| |
| buf = sess->session_id; |
| len = sess->session_id_length; |
| |
| 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_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_subject_dn(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(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_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s) |
| { |
| X509 *cert; |
| |
| if (SSL_get_verify_result(c->ssl->connection) != X509_V_OK) { |
| ngx_str_set(s, "FAILED"); |
| return NGX_OK; |
| } |
| |
| cert = SSL_get_peer_certificate(c->ssl->connection); |
| |
| if (cert) { |
| ngx_str_set(s, "SUCCESS"); |
| |
| } else { |
| ngx_str_set(s, "NONE"); |
| } |
| |
| X509_free(cert); |
| |
| return NGX_OK; |
| } |
| |
| |
| 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) |
| { |
| 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((const char *) value[1].data); |
| |
| if (engine == NULL) { |
| ngx_ssl_error(NGX_LOG_WARN, 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_WARN, 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; |
| } |
| |
| |
| static void |
| ngx_openssl_exit(ngx_cycle_t *cycle) |
| { |
| EVP_cleanup(); |
| ENGINE_cleanup(); |
| } |