Allow app gets the native SSL socket instance in TLS verification callback

pjlib/include/pj/ssl_sock.h

@@ -682,6 +682,10 @@ typedef struct pj_ssl_sock_cb
      * Certification info can be obtained from #pj_ssl_sock_info. Currently
      * it's only implemented for OpenSSL backend.
      *
+     * If this is set, the callback will always be invoked, even when peer
+     * verification is disabled (pj_ssl_sock_param.verify_peer set to
+     * PJ_FALSE).
+     *
      * @param ssock     The secure socket.
      * @param is_server PJ_TRUE to indicate an incoming connection.
      *
@@ -809,6 +813,12 @@ typedef struct pj_ssl_sock_info
      */
     pj_grp_lock_t *grp_lock;
 
+    /**
+     * Native TLS/SSL instance of the backend. Currently only available for
+     * OpenSSL backend (this will contain the OpenSSL "SSL" instance).
+     */
+    void *native_ssl;
+
 } pj_ssl_sock_info;
 
 

pjlib/src/pj/ssl_sock_imp_common.c

@@ -1574,17 +1574,26 @@ PJ_DEF(pj_status_t) pj_ssl_sock_get_info (pj_ssl_sock_t *ssock,
 
     if (info->established) {
         info->cipher = ssl_get_cipher(ssock);
-
-        /* Verification status */
-        info->verify_status = ssock->verify_status;
     }
 
+    /* Verification status */
+    info->verify_status = ssock->verify_status;
+
     /* Last known SSL error code */
     info->last_native_err = ssock->last_err;
 
     /* Group lock */
     info->grp_lock = ssock->param.grp_lock;
 
+    /* Native SSL object */
+#if defined(PJ_HAS_SSL_SOCK) && PJ_HAS_SSL_SOCK != 0 && \
+    (PJ_SSL_SOCK_IMP == PJ_SSL_SOCK_IMP_OPENSSL)
+    {
+        ossl_sock_t *ossock = (ossl_sock_t *)ssock;
+        info->native_ssl = ossock->ossl_ssl;
+    }
+#endif
+
     return PJ_SUCCESS;
 }
 

pjlib/src/pj/ssl_sock_ossl.c

@@ -36,7 +36,7 @@
 #if defined(PJ_HAS_SSL_SOCK) && PJ_HAS_SSL_SOCK != 0 && \
     (PJ_SSL_SOCK_IMP == PJ_SSL_SOCK_IMP_OPENSSL)
 
-#include "ssl_sock_imp_common.c"
+#include "ssl_sock_imp_common.h"
 
 #define THIS_FILE               "ssl_sock_ossl.c"
 
@@ -230,6 +230,10 @@ typedef struct ossl_sock_t
     BIO                  *ossl_wbio;
 } ossl_sock_t;
 
+
+#include "ssl_sock_imp_common.c"
+
+
 /**
  * Mapping from OpenSSL error codes to pjlib error space.
  */
@@ -946,15 +950,6 @@ static int verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
         goto on_return;
     }
 
-    if (ssock->param.cb.on_verify_cb) {
-        update_certs_info(ssock, x509_ctx, &ssock->local_cert_info, 
-                          &ssock->remote_cert_info, PJ_TRUE);
-        preverify_ok = (*ssock->param.cb.on_verify_cb)(ssock, 
-                                                       ssock->is_server);
-
-        goto on_return;
-    }
-
     /* Store verification status */
     err = X509_STORE_CTX_get_error(x509_ctx);
     switch (err) {
@@ -1025,6 +1020,16 @@ static int verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
         break;
     }
 
+    /* Invoke app's verification callback */
+    if (ssock->param.cb.on_verify_cb) {
+        update_certs_info(ssock, x509_ctx, &ssock->local_cert_info,
+                          &ssock->remote_cert_info, PJ_TRUE);
+        preverify_ok = (*ssock->param.cb.on_verify_cb)(ssock,
+                                                       ssock->is_server);
+
+        goto on_return;
+    }
+
     /* When verification is not requested just return ok here, however
      * application can still get the verification status.
      */

pjsip/include/pjsip/sip_transport_tls.h

@@ -132,6 +132,11 @@ typedef struct pjsip_tls_on_verify_param {
      */
     pj_ssl_cert_info *remote_cert_info;
 
+    /**
+     * The SSL socket instance.
+     */
+    pj_ssl_sock_t *ssock;
+
 } pjsip_tls_on_verify_param;
 
 
@@ -379,6 +384,10 @@ typedef struct pjsip_tls_setting
      * Callback to be called to verify a new connection.  Currently it's only 
      * implemented for OpenSSL backend.
      *
+     * If this is set, the callback will always be invoked, even when peer
+     * verification is disabled (pjsip_tls_setting.verify_server/verify_client
+     * set to PJ_FALSE).
+     *
      * @param param         The parameter to the callback.
      * 
      * @return              Return PJ_TRUE if succesfully verified. 

pjsip/src/pjsip/sip_transport_tls.c

@@ -1621,6 +1621,7 @@ static pj_bool_t on_verify_cb(pj_ssl_sock_t* ssock, pj_bool_t is_server)
         param.local_cert_info = info.local_cert_info;
         param.remote_cert_info = info.remote_cert_info;
         param.tp_dir = is_server?PJSIP_TP_DIR_INCOMING:PJSIP_TP_DIR_OUTGOING;
+        param.ssock = ssock;
 
         return (*verify_cb)(&param);
     }