From 37e8cd9fb160b1b8ecee7bb611598d1bb998da22 Mon Sep 17 00:00:00 2001
From: Sauw Ming <ming@teluu.com>
Date: Wed, 30 Apr 2014 08:21:28 +0000
Subject: [PATCH] Fixed #1763: Add pj_ssl_cipher_id() API

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@4829 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjlib/include/pj/ssl_sock.h       |  7 ++++++-
 pjlib/src/pj/ssl_sock_ossl.c      | 18 ++++++++++++++++++
 pjlib/src/pj/ssl_sock_symbian.cpp | 21 +++++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/pjlib/include/pj/ssl_sock.h b/pjlib/include/pj/ssl_sock.h
index bfad5af2d..0d24a4942 100644
--- a/pjlib/include/pj/ssl_sock.h
+++ b/pjlib/include/pj/ssl_sock.h
@@ -243,6 +243,9 @@ PJ_DECL(pj_status_t) pj_ssl_cert_get_verify_status_strings(
  */
 typedef enum pj_ssl_cipher {
 
+    /* Unsupported cipher */
+    PJ_TLS_UNKNOWN_CIPHER                       = -1,
+
     /* NULL */
     PJ_TLS_NULL_WITH_NULL_NULL               	= 0x00000000,
 
@@ -353,7 +356,9 @@ PJ_DECL(const char*) pj_ssl_cipher_name(pj_ssl_cipher cipher);
 
 
 /**
- * Get cipher ID from cipher name string.
+ * Get cipher ID from cipher name string. Note that on different backends
+ * (e.g. OpenSSL or Symbian implementation), cipher names may not be
+ * equivalent for the same cipher ID.
  *
  * @param cipher_name	The cipher name string.
  *
diff --git a/pjlib/src/pj/ssl_sock_ossl.c b/pjlib/src/pj/ssl_sock_ossl.c
index 7129f21fe..b05f2c03c 100644
--- a/pjlib/src/pj/ssl_sock_ossl.c
+++ b/pjlib/src/pj/ssl_sock_ossl.c
@@ -1888,6 +1888,24 @@ PJ_DEF(const char*) pj_ssl_cipher_name(pj_ssl_cipher cipher)
     return NULL;
 }
 
+/* Get cipher identifier */
+PJ_DEF(pj_ssl_cipher) pj_ssl_cipher_id(const char *cipher_name)
+{
+    unsigned i;
+
+    if (openssl_cipher_num == 0) {
+        init_openssl();
+        shutdown_openssl();
+    }
+
+    for (i = 0; i < openssl_cipher_num; ++i) {
+        if (!pj_ansi_stricmp(openssl_ciphers[i].name, cipher_name))
+            return openssl_ciphers[i].id;
+    }
+
+    return PJ_TLS_UNKNOWN_CIPHER;
+}
+
 /* Check if the specified cipher is supported by SSL/TLS backend. */
 PJ_DEF(pj_bool_t) pj_ssl_cipher_is_supported(pj_ssl_cipher cipher)
 {
diff --git a/pjlib/src/pj/ssl_sock_symbian.cpp b/pjlib/src/pj/ssl_sock_symbian.cpp
index 47288fae6..013318b2f 100644
--- a/pjlib/src/pj/ssl_sock_symbian.cpp
+++ b/pjlib/src/pj/ssl_sock_symbian.cpp
@@ -42,6 +42,7 @@ typedef struct cipher_name_t {
 /* Cipher name constants */
 static cipher_name_t cipher_names[] =
 {
+    {PJ_TLS_UNKNOWN_CIPHER,                    "UNKNOWN"},
     {PJ_TLS_NULL_WITH_NULL_NULL,               "NULL"},
 
     /* TLS/SSLv3 */
@@ -759,6 +760,26 @@ PJ_DEF(const char*) pj_ssl_cipher_name(pj_ssl_cipher cipher)
 }
 
 
+/* Get cipher identifier */
+PJ_DEF(pj_ssl_cipher) pj_ssl_cipher_id(const char *cipher_name)
+{
+    unsigned i;
+    
+    if (ciphers_num_ == 0) {
+	pj_ssl_cipher c[1];
+	i = 0;
+	pj_ssl_cipher_get_availables(c, &i);
+    }
+    
+    for (i = 0; i < ciphers_num_; ++i) {
+        if (!pj_ansi_stricmp(ciphers_[i].name, cipher_name))
+            return ciphers_[i].id;
+    }
+
+    return PJ_TLS_UNKNOWN_CIPHER;
+}
+
+
 /* Check if the specified cipher is supported by SSL/TLS backend. */
 PJ_DEF(pj_bool_t) pj_ssl_cipher_is_supported(pj_ssl_cipher cipher)
 {