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-rw-r--r--modules/ssl/ssl_engine_vars.c1230
1 files changed, 1230 insertions, 0 deletions
diff --git a/modules/ssl/ssl_engine_vars.c b/modules/ssl/ssl_engine_vars.c
new file mode 100644
index 0000000..418d849
--- /dev/null
+++ b/modules/ssl/ssl_engine_vars.c
@@ -0,0 +1,1230 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* _ _
+ * _ __ ___ ___ __| | ___ ___| | mod_ssl
+ * | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL
+ * | | | | | | (_) | (_| | \__ \__ \ |
+ * |_| |_| |_|\___/ \__,_|___|___/___/_|
+ * |_____|
+ * ssl_engine_vars.c
+ * Variable Lookup Facility
+ */
+ /* ``Those of you who think they
+ know everything are very annoying
+ to those of us who do.''
+ -- Unknown */
+#include "ssl_private.h"
+#include "mod_ssl.h"
+#include "ap_expr.h"
+
+#include "apr_time.h"
+
+/* _________________________________________________________________
+**
+** Variable Lookup
+** _________________________________________________________________
+*/
+
+static char *ssl_var_lookup_ssl(apr_pool_t *p, SSLConnRec *sslconn, request_rec *r, char *var);
+static char *ssl_var_lookup_ssl_cert(apr_pool_t *p, request_rec *r, X509 *xs, char *var);
+static char *ssl_var_lookup_ssl_cert_dn(apr_pool_t *p, X509_NAME *xsname, const char *var);
+static char *ssl_var_lookup_ssl_cert_san(apr_pool_t *p, X509 *xs, char *var);
+static char *ssl_var_lookup_ssl_cert_valid(apr_pool_t *p, ASN1_TIME *tm);
+static char *ssl_var_lookup_ssl_cert_remain(apr_pool_t *p, ASN1_TIME *tm);
+static char *ssl_var_lookup_ssl_cert_serial(apr_pool_t *p, X509 *xs);
+static char *ssl_var_lookup_ssl_cert_chain(apr_pool_t *p, STACK_OF(X509) *sk, char *var);
+static char *ssl_var_lookup_ssl_cert_rfc4523_cea(apr_pool_t *p, SSL *ssl);
+static char *ssl_var_lookup_ssl_cert_PEM(apr_pool_t *p, X509 *xs);
+static char *ssl_var_lookup_ssl_cert_verify(apr_pool_t *p, SSLConnRec *sslconn);
+static char *ssl_var_lookup_ssl_cipher(apr_pool_t *p, SSLConnRec *sslconn, char *var);
+static void ssl_var_lookup_ssl_cipher_bits(SSL *ssl, int *usekeysize, int *algkeysize);
+static char *ssl_var_lookup_ssl_version(apr_pool_t *p, char *var);
+static char *ssl_var_lookup_ssl_compress_meth(SSL *ssl);
+
+static SSLConnRec *ssl_get_effective_config(conn_rec *c)
+{
+ SSLConnRec *sslconn = myConnConfig(c);
+ if (!(sslconn && sslconn->ssl) && c->master) {
+ /* use master connection if no SSL defined here */
+ sslconn = myConnConfig(c->master);
+ }
+ return sslconn;
+}
+
+static int ssl_conn_is_ssl(conn_rec *c)
+{
+ const SSLConnRec *sslconn = ssl_get_effective_config(c);
+ return (sslconn && sslconn->ssl)? OK : DECLINED;
+}
+
+static const char var_interface[] = "mod_ssl/" AP_SERVER_BASEREVISION;
+static char var_library_interface[] = MODSSL_LIBRARY_TEXT;
+static char *var_library = NULL;
+
+static apr_array_header_t *expr_peer_ext_list_fn(ap_expr_eval_ctx_t *ctx,
+ const void *dummy,
+ const char *arg)
+{
+ return ssl_ext_list(ctx->p, ctx->c, 1, arg);
+}
+
+static const char *expr_var_fn(ap_expr_eval_ctx_t *ctx, const void *data)
+{
+ char *var = (char *)data;
+ SSLConnRec *sslconn = ssl_get_effective_config(ctx->c);
+
+ return sslconn ? ssl_var_lookup_ssl(ctx->p, sslconn, ctx->r, var) : NULL;
+}
+
+static const char *expr_func_fn(ap_expr_eval_ctx_t *ctx, const void *data,
+ const char *arg)
+{
+ char *var = (char *)arg;
+
+ return var ? ssl_var_lookup(ctx->p, ctx->s, ctx->c, ctx->r, var) : NULL;
+}
+
+static int ssl_expr_lookup(ap_expr_lookup_parms *parms)
+{
+ switch (parms->type) {
+ case AP_EXPR_FUNC_VAR:
+ /* for now, we just handle everything that starts with SSL_, but
+ * register our hook as APR_HOOK_LAST
+ * XXX: This can be optimized
+ */
+ if (strcEQn(parms->name, "SSL_", 4)) {
+ *parms->func = expr_var_fn;
+ *parms->data = parms->name + 4;
+ return OK;
+ }
+ break;
+ case AP_EXPR_FUNC_STRING:
+ /* Function SSL() is implemented by us.
+ */
+ if (strcEQ(parms->name, "SSL")) {
+ *parms->func = expr_func_fn;
+ *parms->data = NULL;
+ return OK;
+ }
+ break;
+ case AP_EXPR_FUNC_LIST:
+ if (strcEQ(parms->name, "PeerExtList")) {
+ *parms->func = expr_peer_ext_list_fn;
+ *parms->data = "PeerExtList";
+ return OK;
+ }
+ break;
+ }
+ return DECLINED;
+}
+
+
+void ssl_var_register(apr_pool_t *p)
+{
+ char *cp, *cp2;
+
+ ap_hook_ssl_conn_is_ssl(ssl_conn_is_ssl, NULL, NULL, APR_HOOK_MIDDLE);
+ APR_REGISTER_OPTIONAL_FN(ssl_var_lookup);
+ APR_REGISTER_OPTIONAL_FN(ssl_ext_list);
+
+ /* Perform once-per-process library version determination: */
+ var_library = apr_pstrdup(p, MODSSL_LIBRARY_DYNTEXT);
+
+ if ((cp = strchr(var_library, ' ')) != NULL) {
+ *cp = '/';
+ if ((cp2 = strchr(cp, ' ')) != NULL)
+ *cp2 = NUL;
+ }
+
+ if ((cp = strchr(var_library_interface, ' ')) != NULL) {
+ *cp = '/';
+ if ((cp2 = strchr(cp, ' ')) != NULL)
+ *cp2 = NUL;
+ }
+
+ ap_hook_expr_lookup(ssl_expr_lookup, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+/* This function must remain safe to use for a non-SSL connection. */
+char *ssl_var_lookup(apr_pool_t *p, server_rec *s, conn_rec *c, request_rec *r, char *var)
+{
+ SSLModConfigRec *mc = myModConfig(s);
+ const char *result;
+ BOOL resdup;
+ apr_time_exp_t tm;
+
+ result = NULL;
+ resdup = TRUE;
+
+ /*
+ * When no pool is given try to find one
+ */
+ if (p == NULL) {
+ if (r != NULL)
+ p = r->pool;
+ else if (c != NULL)
+ p = c->pool;
+ else
+ p = mc->pPool;
+ }
+
+ /*
+ * Request dependent stuff
+ */
+ if (r != NULL) {
+ switch (var[0]) {
+ case 'H':
+ case 'h':
+ if (strcEQ(var, "HTTP_USER_AGENT"))
+ result = apr_table_get(r->headers_in, "User-Agent");
+ else if (strcEQ(var, "HTTP_REFERER"))
+ result = apr_table_get(r->headers_in, "Referer");
+ else if (strcEQ(var, "HTTP_COOKIE"))
+ result = apr_table_get(r->headers_in, "Cookie");
+ else if (strcEQ(var, "HTTP_FORWARDED"))
+ result = apr_table_get(r->headers_in, "Forwarded");
+ else if (strcEQ(var, "HTTP_HOST"))
+ result = apr_table_get(r->headers_in, "Host");
+ else if (strcEQ(var, "HTTP_PROXY_CONNECTION"))
+ result = apr_table_get(r->headers_in, "Proxy-Connection");
+ else if (strcEQ(var, "HTTP_ACCEPT"))
+ result = apr_table_get(r->headers_in, "Accept");
+ else if (strlen(var) > 5 && strcEQn(var, "HTTP:", 5))
+ /* all other headers from which we are still not know about */
+ result = apr_table_get(r->headers_in, var+5);
+ break;
+
+ case 'R':
+ case 'r':
+ if (strcEQ(var, "REQUEST_METHOD"))
+ result = r->method;
+ else if (strcEQ(var, "REQUEST_SCHEME"))
+ result = ap_http_scheme(r);
+ else if (strcEQ(var, "REQUEST_URI"))
+ result = r->uri;
+ else if (strcEQ(var, "REQUEST_FILENAME"))
+ result = r->filename;
+ else if (strcEQ(var, "REMOTE_ADDR"))
+ result = r->useragent_ip;
+ else if (strcEQ(var, "REMOTE_HOST"))
+ result = ap_get_useragent_host(r, REMOTE_NAME, NULL);
+ else if (strcEQ(var, "REMOTE_IDENT"))
+ result = ap_get_remote_logname(r);
+ else if (strcEQ(var, "REMOTE_USER"))
+ result = r->user;
+ break;
+
+ case 'S':
+ case 's':
+ if (strcEQn(var, "SSL", 3)) break; /* shortcut common case */
+
+ if (strcEQ(var, "SERVER_ADMIN"))
+ result = r->server->server_admin;
+ else if (strcEQ(var, "SERVER_NAME"))
+ result = ap_get_server_name_for_url(r);
+ else if (strcEQ(var, "SERVER_PORT"))
+ result = apr_psprintf(p, "%u", ap_get_server_port(r));
+ else if (strcEQ(var, "SERVER_PROTOCOL"))
+ result = r->protocol;
+ else if (strcEQ(var, "SCRIPT_FILENAME"))
+ result = r->filename;
+ break;
+
+ default:
+ if (strcEQ(var, "PATH_INFO"))
+ result = r->path_info;
+ else if (strcEQ(var, "QUERY_STRING"))
+ result = r->args;
+ else if (strcEQ(var, "IS_SUBREQ"))
+ result = (r->main != NULL ? "true" : "false");
+ else if (strcEQ(var, "DOCUMENT_ROOT"))
+ result = ap_document_root(r);
+ else if (strcEQ(var, "AUTH_TYPE"))
+ result = r->ap_auth_type;
+ else if (strcEQ(var, "THE_REQUEST"))
+ result = r->the_request;
+ else if (strlen(var) > 4 && strcEQn(var, "ENV:", 4)) {
+ result = apr_table_get(r->notes, var+4);
+ if (result == NULL)
+ result = apr_table_get(r->subprocess_env, var+4);
+ }
+ break;
+ }
+ }
+
+ /*
+ * Connection stuff
+ */
+ if (result == NULL && c != NULL) {
+ SSLConnRec *sslconn = ssl_get_effective_config(c);
+ if (strlen(var) > 4 && strcEQn(var, "SSL_", 4)
+ && sslconn && sslconn->ssl)
+ result = ssl_var_lookup_ssl(p, sslconn, r, var+4);
+ else if (strcEQ(var, "HTTPS")) {
+ if (sslconn && sslconn->ssl)
+ result = "on";
+ else
+ result = "off";
+ }
+ }
+
+ /*
+ * Totally independent stuff
+ */
+ if (result == NULL) {
+ if (strlen(var) > 12 && strcEQn(var, "SSL_VERSION_", 12))
+ result = ssl_var_lookup_ssl_version(p, var+12);
+ else if (strcEQ(var, "SERVER_SOFTWARE"))
+ result = ap_get_server_banner();
+ else if (strcEQ(var, "API_VERSION")) {
+ result = apr_itoa(p, MODULE_MAGIC_NUMBER_MAJOR);
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "TIME_YEAR")) {
+ apr_time_exp_lt(&tm, apr_time_now());
+ result = apr_psprintf(p, "%02d%02d",
+ (tm.tm_year / 100) + 19, tm.tm_year % 100);
+ resdup = FALSE;
+ }
+#define MKTIMESTR(format, tmfield) \
+ apr_time_exp_lt(&tm, apr_time_now()); \
+ result = apr_psprintf(p, format, tm.tmfield); \
+ resdup = FALSE;
+ else if (strcEQ(var, "TIME_MON")) {
+ MKTIMESTR("%02d", tm_mon+1)
+ }
+ else if (strcEQ(var, "TIME_DAY")) {
+ MKTIMESTR("%02d", tm_mday)
+ }
+ else if (strcEQ(var, "TIME_HOUR")) {
+ MKTIMESTR("%02d", tm_hour)
+ }
+ else if (strcEQ(var, "TIME_MIN")) {
+ MKTIMESTR("%02d", tm_min)
+ }
+ else if (strcEQ(var, "TIME_SEC")) {
+ MKTIMESTR("%02d", tm_sec)
+ }
+ else if (strcEQ(var, "TIME_WDAY")) {
+ MKTIMESTR("%d", tm_wday)
+ }
+ else if (strcEQ(var, "TIME")) {
+ apr_time_exp_lt(&tm, apr_time_now());
+ result = apr_psprintf(p,
+ "%02d%02d%02d%02d%02d%02d%02d", (tm.tm_year / 100) + 19,
+ (tm.tm_year % 100), tm.tm_mon+1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+ resdup = FALSE;
+ }
+ /* all other env-variables from the parent Apache process */
+ else if (strlen(var) > 4 && strcEQn(var, "ENV:", 4)) {
+ result = getenv(var+4);
+ }
+ }
+
+ if (result != NULL && resdup)
+ result = apr_pstrdup(p, result);
+ if (result == NULL)
+ result = "";
+ return (char *)result;
+}
+
+static char *ssl_var_lookup_ssl(apr_pool_t *p, SSLConnRec *sslconn,
+ request_rec *r, char *var)
+{
+ char *result;
+ X509 *xs;
+ STACK_OF(X509) *sk;
+ SSL *ssl;
+
+ result = NULL;
+
+ ssl = sslconn->ssl;
+ if (strlen(var) > 8 && strcEQn(var, "VERSION_", 8)) {
+ result = ssl_var_lookup_ssl_version(p, var+8);
+ }
+ else if (ssl != NULL && strcEQ(var, "PROTOCOL")) {
+ result = (char *)SSL_get_version(ssl);
+ }
+ else if (ssl != NULL && strcEQ(var, "SESSION_ID")) {
+ char buf[MODSSL_SESSION_ID_STRING_LEN];
+ SSL_SESSION *pSession = SSL_get_session(ssl);
+ if (pSession) {
+ IDCONST unsigned char *id;
+ unsigned int idlen;
+
+#ifdef OPENSSL_NO_SSL_INTERN
+ id = (unsigned char *)SSL_SESSION_get_id(pSession, &idlen);
+#else
+ id = pSession->session_id;
+ idlen = pSession->session_id_length;
+#endif
+
+ result = apr_pstrdup(p, modssl_SSL_SESSION_id2sz(id, idlen,
+ buf, sizeof(buf)));
+ }
+ }
+ else if(ssl != NULL && strcEQ(var, "SESSION_RESUMED")) {
+ if (SSL_session_reused(ssl) == 1)
+ result = "Resumed";
+ else
+ result = "Initial";
+ }
+ else if (ssl != NULL && strlen(var) >= 6 && strcEQn(var, "CIPHER", 6)) {
+ result = ssl_var_lookup_ssl_cipher(p, sslconn, var+6);
+ }
+ else if (ssl != NULL && strlen(var) > 18 && strcEQn(var, "CLIENT_CERT_CHAIN_", 18)) {
+ sk = SSL_get_peer_cert_chain(ssl);
+ result = ssl_var_lookup_ssl_cert_chain(p, sk, var+18);
+ }
+ else if (ssl != NULL && strcEQ(var, "CLIENT_CERT_RFC4523_CEA")) {
+ result = ssl_var_lookup_ssl_cert_rfc4523_cea(p, ssl);
+ }
+ else if (ssl != NULL && strcEQ(var, "CLIENT_VERIFY")) {
+ result = ssl_var_lookup_ssl_cert_verify(p, sslconn);
+ }
+ else if (ssl != NULL && strlen(var) > 7 && strcEQn(var, "CLIENT_", 7)) {
+ if ((xs = SSL_get_peer_certificate(ssl)) != NULL) {
+ result = ssl_var_lookup_ssl_cert(p, r, xs, var+7);
+ X509_free(xs);
+ }
+ }
+ else if (ssl != NULL && strlen(var) > 7 && strcEQn(var, "SERVER_", 7)) {
+ if ((xs = SSL_get_certificate(ssl)) != NULL) {
+ result = ssl_var_lookup_ssl_cert(p, r, xs, var+7);
+ /* SSL_get_certificate is different from SSL_get_peer_certificate.
+ * No need to X509_free(xs).
+ */
+ }
+ }
+ else if (ssl != NULL && strcEQ(var, "COMPRESS_METHOD")) {
+ result = ssl_var_lookup_ssl_compress_meth(ssl);
+ }
+#ifdef HAVE_TLSEXT
+ else if (ssl != NULL && strcEQ(var, "TLS_SNI")) {
+ result = apr_pstrdup(p, SSL_get_servername(ssl,
+ TLSEXT_NAMETYPE_host_name));
+ }
+#endif
+ else if (ssl != NULL && strcEQ(var, "SECURE_RENEG")) {
+ int flag = 0;
+#ifdef SSL_get_secure_renegotiation_support
+ flag = SSL_get_secure_renegotiation_support(ssl);
+#endif
+ result = apr_pstrdup(p, flag ? "true" : "false");
+ }
+#ifdef HAVE_SRP
+ else if (ssl != NULL && strcEQ(var, "SRP_USER")) {
+ if ((result = SSL_get_srp_username(ssl)) != NULL) {
+ result = apr_pstrdup(p, result);
+ }
+ }
+ else if (ssl != NULL && strcEQ(var, "SRP_USERINFO")) {
+ if ((result = SSL_get_srp_userinfo(ssl)) != NULL) {
+ result = apr_pstrdup(p, result);
+ }
+ }
+#endif
+
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cert_dn_oneline(apr_pool_t *p, request_rec *r,
+ X509_NAME *xsname)
+{
+ char *result = NULL;
+ SSLDirConfigRec *dc;
+ int legacy_format = 0;
+ if (r) {
+ dc = myDirConfig(r);
+ legacy_format = dc->nOptions & SSL_OPT_LEGACYDNFORMAT;
+ }
+ if (legacy_format) {
+ char *cp = X509_NAME_oneline(xsname, NULL, 0);
+ result = apr_pstrdup(p, cp);
+ OPENSSL_free(cp);
+ }
+ else {
+ BIO* bio;
+ unsigned long flags = XN_FLAG_RFC2253 & ~ASN1_STRFLGS_ESC_MSB;
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ X509_NAME_print_ex(bio, xsname, 0, flags);
+
+ result = modssl_bio_free_read(p, bio);
+ }
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cert(apr_pool_t *p, request_rec *r, X509 *xs,
+ char *var)
+{
+ char *result;
+ BOOL resdup;
+ X509_NAME *xsname;
+ int nid;
+
+ result = NULL;
+ resdup = TRUE;
+
+ if (strcEQ(var, "M_VERSION")) {
+ result = apr_psprintf(p, "%lu", X509_get_version(xs)+1);
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "M_SERIAL")) {
+ result = ssl_var_lookup_ssl_cert_serial(p, xs);
+ }
+ else if (strcEQ(var, "V_START")) {
+ result = ssl_var_lookup_ssl_cert_valid(p, X509_get_notBefore(xs));
+ }
+ else if (strcEQ(var, "V_END")) {
+ result = ssl_var_lookup_ssl_cert_valid(p, X509_get_notAfter(xs));
+ }
+ else if (strcEQ(var, "V_REMAIN")) {
+ result = ssl_var_lookup_ssl_cert_remain(p, X509_get_notAfter(xs));
+ resdup = FALSE;
+ }
+ else if (*var && strcEQ(var+1, "_DN")) {
+ if (*var == 'S')
+ xsname = X509_get_subject_name(xs);
+ else if (*var == 'I')
+ xsname = X509_get_issuer_name(xs);
+ else
+ return NULL;
+ result = ssl_var_lookup_ssl_cert_dn_oneline(p, r, xsname);
+ resdup = FALSE;
+ }
+ else if (strlen(var) > 5 && strcEQn(var+1, "_DN_", 4)) {
+ if (*var == 'S')
+ xsname = X509_get_subject_name(xs);
+ else if (*var == 'I')
+ xsname = X509_get_issuer_name(xs);
+ else
+ return NULL;
+ result = ssl_var_lookup_ssl_cert_dn(p, xsname, var+5);
+ resdup = FALSE;
+ }
+ else if (strlen(var) > 4 && strcEQn(var, "SAN_", 4)) {
+ result = ssl_var_lookup_ssl_cert_san(p, xs, var+4);
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "A_SIG")) {
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+ nid = OBJ_obj2nid((ASN1_OBJECT *)(xs->cert_info->signature->algorithm));
+#else
+ const ASN1_OBJECT *paobj;
+ X509_ALGOR_get0(&paobj, NULL, NULL, X509_get0_tbs_sigalg(xs));
+ nid = OBJ_obj2nid(paobj);
+#endif
+ result = apr_pstrdup(p,
+ (nid == NID_undef) ? "UNKNOWN" : OBJ_nid2ln(nid));
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "A_KEY")) {
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+ nid = OBJ_obj2nid((ASN1_OBJECT *)(xs->cert_info->key->algor->algorithm));
+#else
+ ASN1_OBJECT *paobj;
+ X509_PUBKEY_get0_param(&paobj, NULL, 0, NULL, X509_get_X509_PUBKEY(xs));
+ nid = OBJ_obj2nid(paobj);
+#endif
+ result = apr_pstrdup(p,
+ (nid == NID_undef) ? "UNKNOWN" : OBJ_nid2ln(nid));
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "CERT")) {
+ result = ssl_var_lookup_ssl_cert_PEM(p, xs);
+ }
+
+ if (resdup)
+ result = apr_pstrdup(p, result);
+ return result;
+}
+
+/* In this table, .extract is non-zero if RDNs using the NID should be
+ * extracted to for the SSL_{CLIENT,SERVER}_{I,S}_DN_* environment
+ * variables. */
+static const struct {
+ char *name;
+ int nid;
+ int extract;
+} ssl_var_lookup_ssl_cert_dn_rec[] = {
+ { "C", NID_countryName, 1 },
+ { "ST", NID_stateOrProvinceName, 1 }, /* officially (RFC2156) */
+ { "SP", NID_stateOrProvinceName, 0 }, /* compatibility (SSLeay) */
+ { "L", NID_localityName, 1 },
+ { "O", NID_organizationName, 1 },
+ { "OU", NID_organizationalUnitName, 1 },
+ { "CN", NID_commonName, 1 },
+ { "T", NID_title, 1 },
+ { "I", NID_initials, 1 },
+ { "G", NID_givenName, 1 },
+ { "S", NID_surname, 1 },
+ { "D", NID_description, 1 },
+#ifdef NID_userId
+ { "UID", NID_userId, 1 },
+#endif
+ { "Email", NID_pkcs9_emailAddress, 1 },
+ { NULL, 0, 0 }
+};
+
+static char *ssl_var_lookup_ssl_cert_dn(apr_pool_t *p, X509_NAME *xsname,
+ const char *var)
+{
+ const char *ptr;
+ char *result;
+ X509_NAME_ENTRY *xsne;
+ int i, j, n, idx = 0, raw = 0;
+ apr_size_t varlen;
+
+ ptr = ap_strrchr_c(var, '_');
+ if (ptr && ptr > var && strcmp(ptr + 1, "RAW") == 0) {
+ var = apr_pstrmemdup(p, var, ptr - var);
+ raw = 1;
+ }
+
+ /* if an _N suffix is used, find the Nth attribute of given name */
+ ptr = ap_strchr_c(var, '_');
+ if (ptr != NULL && strspn(ptr + 1, "0123456789") == strlen(ptr + 1)) {
+ idx = atoi(ptr + 1);
+ varlen = ptr - var;
+ } else {
+ varlen = strlen(var);
+ }
+
+ result = NULL;
+
+ for (i = 0; ssl_var_lookup_ssl_cert_dn_rec[i].name != NULL; i++) {
+ if (strEQn(var, ssl_var_lookup_ssl_cert_dn_rec[i].name, varlen)
+ && strlen(ssl_var_lookup_ssl_cert_dn_rec[i].name) == varlen) {
+ for (j = 0; j < X509_NAME_entry_count(xsname); j++) {
+ xsne = X509_NAME_get_entry(xsname, j);
+
+ n =OBJ_obj2nid((ASN1_OBJECT *)X509_NAME_ENTRY_get_object(xsne));
+
+ if (n == ssl_var_lookup_ssl_cert_dn_rec[i].nid && idx-- == 0) {
+ result = modssl_X509_NAME_ENTRY_to_string(p, xsne, raw);
+ break;
+ }
+ }
+ break;
+ }
+ }
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cert_san(apr_pool_t *p, X509 *xs, char *var)
+{
+ int type;
+ apr_size_t numlen;
+ const char *onf = NULL;
+ apr_array_header_t *entries;
+
+ if (strcEQn(var, "Email_", 6)) {
+ type = GEN_EMAIL;
+ var += 6;
+ }
+ else if (strcEQn(var, "DNS_", 4)) {
+ type = GEN_DNS;
+ var += 4;
+ }
+ else if (strcEQn(var, "OTHER_", 6)) {
+ type = GEN_OTHERNAME;
+ var += 6;
+ if (strEQn(var, "msUPN_", 6)) {
+ var += 6;
+ onf = "msUPN";
+ }
+ else if (strEQn(var, "dnsSRV_", 7)) {
+ var += 7;
+ onf = "id-on-dnsSRV";
+ }
+ else
+ return NULL;
+ }
+ else
+ return NULL;
+
+ /* sanity check: number must be between 1 and 4 digits */
+ numlen = strspn(var, "0123456789");
+ if ((numlen < 1) || (numlen > 4) || (numlen != strlen(var)))
+ return NULL;
+
+ if (modssl_X509_getSAN(p, xs, type, onf, atoi(var), &entries))
+ /* return the first entry from this 1-element array */
+ return APR_ARRAY_IDX(entries, 0, char *);
+ else
+ return NULL;
+}
+
+static char *ssl_var_lookup_ssl_cert_valid(apr_pool_t *p, ASN1_TIME *tm)
+{
+ BIO* bio;
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ ASN1_TIME_print(bio, tm);
+
+ return modssl_bio_free_read(p, bio);
+}
+
+#define DIGIT2NUM(x) (((x)[0] - '0') * 10 + (x)[1] - '0')
+
+/* Return a string giving the number of days remaining until 'tm', or
+ * "0" if this can't be determined. */
+static char *ssl_var_lookup_ssl_cert_remain(apr_pool_t *p, ASN1_TIME *tm)
+{
+ apr_time_t then, now = apr_time_now();
+ apr_time_exp_t exp = {0};
+ long diff;
+ unsigned char *dp;
+
+ /* Fail if the time isn't a valid ASN.1 TIME; RFC3280 mandates
+ * that the seconds digits are present even though ASN.1
+ * doesn't. */
+ if ((tm->type == V_ASN1_UTCTIME && tm->length < 11) ||
+ (tm->type == V_ASN1_GENERALIZEDTIME && tm->length < 13) ||
+ !ASN1_TIME_check(tm)) {
+ return apr_pstrdup(p, "0");
+ }
+
+ if (tm->type == V_ASN1_UTCTIME) {
+ exp.tm_year = DIGIT2NUM(tm->data);
+ if (exp.tm_year <= 50) exp.tm_year += 100;
+ dp = tm->data + 2;
+ } else {
+ exp.tm_year = DIGIT2NUM(tm->data) * 100 + DIGIT2NUM(tm->data + 2) - 1900;
+ dp = tm->data + 4;
+ }
+
+ exp.tm_mon = DIGIT2NUM(dp) - 1;
+ exp.tm_mday = DIGIT2NUM(dp + 2) + 1;
+ exp.tm_hour = DIGIT2NUM(dp + 4);
+ exp.tm_min = DIGIT2NUM(dp + 6);
+ exp.tm_sec = DIGIT2NUM(dp + 8);
+
+ if (apr_time_exp_gmt_get(&then, &exp) != APR_SUCCESS) {
+ return apr_pstrdup(p, "0");
+ }
+
+ diff = (long)((apr_time_sec(then) - apr_time_sec(now)) / (60*60*24));
+
+ return diff > 0 ? apr_ltoa(p, diff) : apr_pstrdup(p, "0");
+}
+
+static char *ssl_var_lookup_ssl_cert_serial(apr_pool_t *p, X509 *xs)
+{
+ BIO *bio;
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ i2a_ASN1_INTEGER(bio, X509_get_serialNumber(xs));
+
+ return modssl_bio_free_read(p, bio);
+}
+
+static char *ssl_var_lookup_ssl_cert_chain(apr_pool_t *p, STACK_OF(X509) *sk, char *var)
+{
+ char *result;
+ X509 *xs;
+ int n;
+
+ result = NULL;
+
+ if (strspn(var, "0123456789") == strlen(var)) {
+ n = atoi(var);
+ if (n < sk_X509_num(sk)) {
+ xs = sk_X509_value(sk, n);
+ result = ssl_var_lookup_ssl_cert_PEM(p, xs);
+ }
+ }
+
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cert_rfc4523_cea(apr_pool_t *p, SSL *ssl)
+{
+ char *result;
+ X509 *xs;
+
+ ASN1_INTEGER *serialNumber;
+
+ if (!(xs = SSL_get_peer_certificate(ssl))) {
+ return NULL;
+ }
+
+ result = NULL;
+
+ serialNumber = X509_get_serialNumber(xs);
+ if (serialNumber) {
+ X509_NAME *issuer = X509_get_issuer_name(xs);
+ if (issuer) {
+ BIGNUM *bn = ASN1_INTEGER_to_BN(serialNumber, NULL);
+ char *decimal = BN_bn2dec(bn);
+ result = apr_pstrcat(p, "{ serialNumber ", decimal,
+ ", issuer rdnSequence:\"",
+ modssl_X509_NAME_to_string(p, issuer, 0), "\" }", NULL);
+ OPENSSL_free(decimal);
+ BN_free(bn);
+ }
+ }
+
+ X509_free(xs);
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cert_PEM(apr_pool_t *p, X509 *xs)
+{
+ BIO *bio;
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ PEM_write_bio_X509(bio, xs);
+
+ return modssl_bio_free_read(p, bio);
+}
+
+static char *ssl_var_lookup_ssl_cert_verify(apr_pool_t *p, SSLConnRec *sslconn)
+{
+ char *result;
+ long vrc;
+ const char *verr;
+ const char *vinfo;
+ SSL *ssl;
+ X509 *xs;
+
+ result = NULL;
+ ssl = sslconn->ssl;
+ verr = sslconn->verify_error;
+ vinfo = sslconn->verify_info;
+ vrc = SSL_get_verify_result(ssl);
+ xs = SSL_get_peer_certificate(ssl);
+
+ if (vrc == X509_V_OK && verr == NULL && xs == NULL)
+ /* no client verification done at all */
+ result = "NONE";
+ else if (vrc == X509_V_OK && verr == NULL && vinfo == NULL && xs != NULL)
+ /* client verification done successful */
+ result = "SUCCESS";
+ else if (vrc == X509_V_OK && vinfo != NULL && strEQ(vinfo, "GENEROUS"))
+ /* client verification done in generous way */
+ result = "GENEROUS";
+ else
+ /* client verification failed */
+ result = apr_psprintf(p, "FAILED:%s",
+ verr ? verr : X509_verify_cert_error_string(vrc));
+
+ if (xs)
+ X509_free(xs);
+ return result;
+}
+
+static char *ssl_var_lookup_ssl_cipher(apr_pool_t *p, SSLConnRec *sslconn, char *var)
+{
+ char *result;
+ BOOL resdup;
+ int usekeysize, algkeysize;
+ SSL *ssl;
+
+ result = NULL;
+ resdup = TRUE;
+
+ ssl = sslconn->ssl;
+ ssl_var_lookup_ssl_cipher_bits(ssl, &usekeysize, &algkeysize);
+
+ if (ssl && strEQ(var, "")) {
+ MODSSL_SSL_CIPHER_CONST SSL_CIPHER *cipher = SSL_get_current_cipher(ssl);
+ result = (cipher != NULL ? (char *)SSL_CIPHER_get_name(cipher) : NULL);
+ }
+ else if (strcEQ(var, "_EXPORT"))
+ result = (usekeysize < 56 ? "true" : "false");
+ else if (strcEQ(var, "_USEKEYSIZE")) {
+ result = apr_itoa(p, usekeysize);
+ resdup = FALSE;
+ }
+ else if (strcEQ(var, "_ALGKEYSIZE")) {
+ result = apr_itoa(p, algkeysize);
+ resdup = FALSE;
+ }
+
+ if (result != NULL && resdup)
+ result = apr_pstrdup(p, result);
+ return result;
+}
+
+static void ssl_var_lookup_ssl_cipher_bits(SSL *ssl, int *usekeysize, int *algkeysize)
+{
+ MODSSL_SSL_CIPHER_CONST SSL_CIPHER *cipher;
+
+ *usekeysize = 0;
+ *algkeysize = 0;
+ if (ssl != NULL)
+ if ((cipher = SSL_get_current_cipher(ssl)) != NULL)
+ *usekeysize = SSL_CIPHER_get_bits(cipher, algkeysize);
+ return;
+}
+
+static char *ssl_var_lookup_ssl_version(apr_pool_t *p, char *var)
+{
+ if (strEQ(var, "INTERFACE")) {
+ return apr_pstrdup(p, var_interface);
+ }
+ else if (strEQ(var, "LIBRARY_INTERFACE")) {
+ return apr_pstrdup(p, var_library_interface);
+ }
+ else if (strEQ(var, "LIBRARY")) {
+ return apr_pstrdup(p, var_library);
+ }
+ return NULL;
+}
+
+/* Add each RDN in 'xn' to the table 't' where the NID is present in
+ * 'nids', using key prefix 'pfx'. */
+static void extract_dn(apr_table_t *t, apr_hash_t *nids, const char *pfx,
+ X509_NAME *xn, apr_pool_t *p)
+{
+ X509_NAME_ENTRY *xsne;
+ apr_hash_t *count;
+ int i, nid;
+
+ /* Hash of (int) NID -> (int *) counter to count each time an RDN
+ * with the given NID has been seen. */
+ count = apr_hash_make(p);
+
+ /* For each RDN... */
+ for (i = 0; i < X509_NAME_entry_count(xn); i++) {
+ const char *tag;
+ xsne = X509_NAME_get_entry(xn, i);
+
+ /* Retrieve the nid, and check whether this is one of the nids
+ * which are to be extracted. */
+ nid = OBJ_obj2nid((ASN1_OBJECT *)X509_NAME_ENTRY_get_object(xsne));
+
+ tag = apr_hash_get(nids, &nid, sizeof nid);
+ if (tag) {
+ const char *key;
+ int *dup;
+ char *value;
+
+ /* Check whether a variable with this nid was already
+ * been used; if so, use the foo_N=bar syntax. */
+ dup = apr_hash_get(count, &nid, sizeof nid);
+ if (dup) {
+ key = apr_psprintf(p, "%s%s_%d", pfx, tag, ++(*dup));
+ }
+ else {
+ /* Otherwise, use the plain foo=bar syntax. */
+ dup = apr_pcalloc(p, sizeof *dup);
+ apr_hash_set(count, &nid, sizeof nid, dup);
+ key = apr_pstrcat(p, pfx, tag, NULL);
+ }
+ value = modssl_X509_NAME_ENTRY_to_string(p, xsne, 0);
+ apr_table_setn(t, key, value);
+ }
+ }
+}
+
+void modssl_var_extract_dns(apr_table_t *t, SSL *ssl, apr_pool_t *p)
+{
+ apr_hash_t *nids;
+ unsigned n;
+ X509 *xs;
+
+ /* Build up a hash table of (int *)NID->(char *)short-name for all
+ * the tags which are to be extracted: */
+ nids = apr_hash_make(p);
+ for (n = 0; ssl_var_lookup_ssl_cert_dn_rec[n].name; n++) {
+ if (ssl_var_lookup_ssl_cert_dn_rec[n].extract) {
+ apr_hash_set(nids, &ssl_var_lookup_ssl_cert_dn_rec[n].nid,
+ sizeof(ssl_var_lookup_ssl_cert_dn_rec[0].nid),
+ ssl_var_lookup_ssl_cert_dn_rec[n].name);
+ }
+ }
+
+ /* Extract the server cert DNS -- note that the refcount does NOT
+ * increase: */
+ xs = SSL_get_certificate(ssl);
+ if (xs) {
+ extract_dn(t, nids, "SSL_SERVER_S_DN_", X509_get_subject_name(xs), p);
+ extract_dn(t, nids, "SSL_SERVER_I_DN_", X509_get_issuer_name(xs), p);
+ }
+
+ /* Extract the client cert DNs -- note that the refcount DOES
+ * increase: */
+ xs = SSL_get_peer_certificate(ssl);
+ if (xs) {
+ extract_dn(t, nids, "SSL_CLIENT_S_DN_", X509_get_subject_name(xs), p);
+ extract_dn(t, nids, "SSL_CLIENT_I_DN_", X509_get_issuer_name(xs), p);
+ X509_free(xs);
+ }
+}
+
+static void extract_san_array(apr_table_t *t, const char *pfx,
+ apr_array_header_t *entries, apr_pool_t *p)
+{
+ int i;
+
+ for (i = 0; i < entries->nelts; i++) {
+ const char *key = apr_psprintf(p, "%s_%d", pfx, i);
+ apr_table_setn(t, key, APR_ARRAY_IDX(entries, i, const char *));
+ }
+}
+
+void modssl_var_extract_san_entries(apr_table_t *t, SSL *ssl, apr_pool_t *p)
+{
+ X509 *xs;
+ apr_array_header_t *entries;
+
+ /* subjectAltName entries of the server certificate */
+ xs = SSL_get_certificate(ssl);
+ if (xs) {
+ if (modssl_X509_getSAN(p, xs, GEN_EMAIL, NULL, -1, &entries)) {
+ extract_san_array(t, "SSL_SERVER_SAN_Email", entries, p);
+ }
+ if (modssl_X509_getSAN(p, xs, GEN_DNS, NULL, -1, &entries)) {
+ extract_san_array(t, "SSL_SERVER_SAN_DNS", entries, p);
+ }
+ if (modssl_X509_getSAN(p, xs, GEN_OTHERNAME, "id-on-dnsSRV", -1,
+ &entries)) {
+ extract_san_array(t, "SSL_SERVER_SAN_OTHER_dnsSRV", entries, p);
+ }
+ /* no need to free xs (refcount does not increase) */
+ }
+
+ /* subjectAltName entries of the client certificate */
+ xs = SSL_get_peer_certificate(ssl);
+ if (xs) {
+ if (modssl_X509_getSAN(p, xs, GEN_EMAIL, NULL, -1, &entries)) {
+ extract_san_array(t, "SSL_CLIENT_SAN_Email", entries, p);
+ }
+ if (modssl_X509_getSAN(p, xs, GEN_DNS, NULL, -1, &entries)) {
+ extract_san_array(t, "SSL_CLIENT_SAN_DNS", entries, p);
+ }
+ if (modssl_X509_getSAN(p, xs, GEN_OTHERNAME, "msUPN", -1, &entries)) {
+ extract_san_array(t, "SSL_CLIENT_SAN_OTHER_msUPN", entries, p);
+ }
+ X509_free(xs);
+ }
+}
+
+/* For an extension type which OpenSSL does not recognize, attempt to
+ * parse the extension type as a primitive string. This will fail for
+ * any structured extension type per the docs. Returns non-zero on
+ * success and writes the string to the given bio. */
+static int dump_extn_value(BIO *bio, ASN1_OCTET_STRING *str)
+{
+ const unsigned char *pp = str->data;
+ ASN1_STRING *ret = ASN1_STRING_new();
+ int rv = 0;
+
+ /* This allows UTF8String, IA5String, VisibleString, or BMPString;
+ * conversion to UTF-8 is forced. */
+ if (d2i_DISPLAYTEXT(&ret, &pp, str->length)) {
+ ASN1_STRING_print_ex(bio, ret, ASN1_STRFLGS_UTF8_CONVERT);
+ rv = 1;
+ }
+
+ ASN1_STRING_free(ret);
+ return rv;
+}
+
+apr_array_header_t *ssl_ext_list(apr_pool_t *p, conn_rec *c, int peer,
+ const char *extension)
+{
+ SSLConnRec *sslconn = ssl_get_effective_config(c);
+ SSL *ssl = NULL;
+ apr_array_header_t *array = NULL;
+ X509 *xs = NULL;
+ ASN1_OBJECT *oid = NULL;
+ int count = 0, j;
+
+ if (!sslconn || !sslconn->ssl || !extension) {
+ return NULL;
+ }
+ ssl = sslconn->ssl;
+
+ /* We accept the "extension" string to be converted as
+ * a long name (nsComment), short name (DN) or
+ * numeric OID (1.2.3.4).
+ */
+ oid = OBJ_txt2obj(extension, 0);
+ if (!oid) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(01970)
+ "could not parse OID '%s'", extension);
+ ERR_clear_error();
+ return NULL;
+ }
+
+ xs = peer ? SSL_get_peer_certificate(ssl) : SSL_get_certificate(ssl);
+ if (xs == NULL) {
+ return NULL;
+ }
+
+ count = X509_get_ext_count(xs);
+ /* Create an array large enough to accommodate every extension. This is
+ * likely overkill, but safe.
+ */
+ array = apr_array_make(p, count, sizeof(char *));
+ for (j = 0; j < count; j++) {
+ X509_EXTENSION *ext = X509_get_ext(xs, j);
+
+ if (OBJ_cmp(X509_EXTENSION_get_object(ext), oid) == 0) {
+ BIO *bio = BIO_new(BIO_s_mem());
+
+ /* We want to obtain a string representation of the extensions
+ * value and add it to the array we're building.
+ * X509V3_EXT_print() doesn't know about all the possible
+ * data types, but the value is stored as an ASN1_OCTET_STRING
+ * allowing us a fallback in case of X509V3_EXT_print
+ * not knowing how to handle the data.
+ */
+ if (X509V3_EXT_print(bio, ext, 0, 0) == 1 ||
+ dump_extn_value(bio, X509_EXTENSION_get_data(ext)) == 1) {
+ BUF_MEM *buf;
+ char **ptr = apr_array_push(array);
+ BIO_get_mem_ptr(bio, &buf);
+ *ptr = apr_pstrmemdup(p, buf->data, buf->length);
+ } else {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(01971)
+ "Found an extension '%s', but failed to "
+ "create a string from it", extension);
+ }
+ BIO_vfree(bio);
+ }
+ }
+
+ if (array->nelts == 0)
+ array = NULL;
+
+ if (peer) {
+ /* only SSL_get_peer_certificate raises the refcount */
+ X509_free(xs);
+ }
+
+ ASN1_OBJECT_free(oid);
+ ERR_clear_error();
+ return array;
+}
+
+static char *ssl_var_lookup_ssl_compress_meth(SSL *ssl)
+{
+ char *result = "NULL";
+#ifndef OPENSSL_NO_COMP
+ SSL_SESSION *pSession = SSL_get_session(ssl);
+
+ if (pSession) {
+#ifdef OPENSSL_NO_SSL_INTERN
+ switch (SSL_SESSION_get_compress_id(pSession)) {
+#else
+ switch (pSession->compress_meth) {
+#endif
+ case 0:
+ /* default "NULL" already set */
+ break;
+
+ /* Defined by RFC 3749, deflate is coded by "1" */
+ case 1:
+ result = "DEFLATE";
+ break;
+
+ /* IANA assigned compression number for LZS */
+ case 0x40:
+ result = "LZS";
+ break;
+
+ default:
+ result = "UNKNOWN";
+ break;
+ }
+ }
+#endif
+ return result;
+}
+
+/* _________________________________________________________________
+**
+** SSL Extension to mod_log_config
+** _________________________________________________________________
+*/
+
+#include "../../modules/loggers/mod_log_config.h"
+
+static const char *ssl_var_log_handler_c(request_rec *r, char *a);
+static const char *ssl_var_log_handler_x(request_rec *r, char *a);
+
+/*
+ * register us for the mod_log_config function registering phase
+ * to establish %{...}c and to be able to expand %{...}x variables.
+ */
+void ssl_var_log_config_register(apr_pool_t *p)
+{
+ APR_OPTIONAL_FN_TYPE(ap_register_log_handler) *log_pfn_register;
+
+ log_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_log_handler);
+
+ if (log_pfn_register) {
+ log_pfn_register(p, "c", ssl_var_log_handler_c, 0);
+ log_pfn_register(p, "x", ssl_var_log_handler_x, 0);
+ }
+ return;
+}
+
+/*
+ * implement the %{..}c log function
+ * (we are the only function)
+ */
+static const char *ssl_var_log_handler_c(request_rec *r, char *a)
+{
+ SSLConnRec *sslconn = ssl_get_effective_config(r->connection);
+ char *result;
+
+ if (sslconn == NULL || sslconn->ssl == NULL)
+ return NULL;
+ result = NULL;
+ if (strEQ(a, "version"))
+ result = ssl_var_lookup(r->pool, r->server, r->connection, r, "SSL_PROTOCOL");
+ else if (strEQ(a, "cipher"))
+ result = ssl_var_lookup(r->pool, r->server, r->connection, r, "SSL_CIPHER");
+ else if (strEQ(a, "subjectdn") || strEQ(a, "clientcert"))
+ result = ssl_var_lookup(r->pool, r->server, r->connection, r, "SSL_CLIENT_S_DN");
+ else if (strEQ(a, "issuerdn") || strEQ(a, "cacert"))
+ result = ssl_var_lookup(r->pool, r->server, r->connection, r, "SSL_CLIENT_I_DN");
+ else if (strEQ(a, "errcode"))
+ result = "-";
+ else if (strEQ(a, "errstr"))
+ result = (char *)sslconn->verify_error;
+ if (result != NULL && result[0] == NUL)
+ result = NULL;
+ return result;
+}
+
+/*
+ * extend the implementation of the %{..}x log function
+ * (there can be more functions)
+ */
+static const char *ssl_var_log_handler_x(request_rec *r, char *a)
+{
+ char *result;
+
+ result = ssl_var_lookup(r->pool, r->server, r->connection, r, a);
+ if (result != NULL && result[0] == NUL)
+ result = NULL;
+ return result;
+}
+
+