MT#56126 New function: crypto_params_sdes_cmp()

A new function dedicated to SDES crypto suites comparison.
It compares the crypto suites using a name in 'str' format.

Recommended to be used in combination with:
g_queue_find_custom() or g_list_find_custom()

Change-Id: I08ff6d3304f74d29154110caa472618478ca1837

daemon/crypto.c

@@ -336,7 +336,7 @@ const unsigned int num_crypto_suites = G_N_ELEMENTS(__crypto_suites);
 
 
 
-const struct crypto_suite *crypto_find_suite(const str *s) {
+const struct crypto_suite * crypto_find_suite(const str *s) {
 	int i, l;
 	const struct crypto_suite *cs;
 
@@ -358,8 +358,6 @@ const struct crypto_suite *crypto_find_suite(const str *s) {
 	return NULL;
 }
 
-
-
 /* rfc 3711 section 4.1 and 4.1.1
  * "in" and "out" MAY point to the same buffer */
 static void aes_ctr(unsigned char *out, str *in, EVP_CIPHER_CTX *ecc, const unsigned char *iv) {

include/crypto.h

@@ -9,7 +9,6 @@
 #include "str.h"
 #include "aux.h"
 
-
 #define SRTP_MAX_MASTER_KEY_LEN 32
 #define SRTP_MAX_MASTER_SALT_LEN 14
 #define SRTP_MAX_SESSION_KEY_LEN 32
@@ -107,11 +106,22 @@ extern __thread GString *crypto_debug_string;
 
 void crypto_init_main(void);
 
-const struct crypto_suite *crypto_find_suite(const str *);
+const struct crypto_suite * crypto_find_suite(const str *);
 int crypto_gen_session_key(struct crypto_context *, str *, unsigned char, int);
 void crypto_dump_keys(struct crypto_context *in, struct crypto_context *out);
 char *crypto_params_sdes_dump(const struct crypto_params_sdes *, char **);
 
+/**
+ * A function which compares two crypto suite names in str format.
+ * Recommended to be used in combination with:
+ * g_queue_find_custom() or g_list_find_custom()
+ */
+INLINE int crypto_params_sdes_cmp(gconstpointer a, gconstpointer b)
+{
+	const struct crypto_params_sdes * cs = a;
+
+	return str_cmp_str(&cs->params.crypto_suite->name_str, (str *) b);
+}
 
 
 INLINE int crypto_encrypt_rtp(struct crypto_context *c, struct rtp_header *rtp,