Add a return value to tls_prf_t.set_key()

src/libtls/tls_crypto.c

@@ -1483,13 +1483,14 @@ static bool derive_master(private_tls_crypto_t *this, chunk_t premaster,
 
 	/* derive master secret */
 	seed = chunk_cata("cc", client_random, server_random);
-	this->prf->set_key(this->prf, premaster);
-	if (!this->prf->get_bytes(this->prf, "master secret", seed,
-						 sizeof(master), master))
+
+	if (!this->prf->set_key(this->prf, premaster) ||
+		!this->prf->get_bytes(this->prf, "master secret", seed,
+							  sizeof(master), master) ||
+		!this->prf->set_key(this->prf, chunk_from_thing(master)))
 	{
 		return FALSE;
 	}
-	this->prf->set_key(this->prf, chunk_from_thing(master));
 
 	if (this->cache && session.len)
 	{
@@ -1624,8 +1625,8 @@ METHOD(tls_crypto_t, resume_session, tls_cipher_suite_t,
 			this->suite = select_cipher_suite(this, &this->suite, 1, KEY_ANY);
 			if (this->suite)
 			{
-				this->prf->set_key(this->prf, master);
-				if (!expand_keys(this, client_random, server_random))
+				if (!this->prf->set_key(this->prf, master) ||
+					!expand_keys(this, client_random, server_random))
 				{
 					this->suite = 0;
 				}

src/libtls/tls_prf.c

@@ -33,10 +33,11 @@ struct private_tls_prf12_t {
 	prf_t *prf;
 };
 
-METHOD(tls_prf_t, set_key12, void,
+METHOD(tls_prf_t, set_key12, bool,
 	private_tls_prf12_t *this, chunk_t key)
 {
 	this->prf->set_key(this->prf, key);
+	return TRUE;
 }
 
 /**
@@ -136,13 +137,14 @@ struct private_tls_prf10_t {
 	prf_t *sha1;
 };
 
-METHOD(tls_prf_t, set_key10, void,
+METHOD(tls_prf_t, set_key10, bool,
 	private_tls_prf10_t *this, chunk_t key)
 {
 	size_t len = key.len / 2 + key.len % 2;
 
 	this->md5->set_key(this->md5, chunk_create(key.ptr, len));
 	this->sha1->set_key(this->sha1, chunk_create(key.ptr + key.len - len, len));
+	return TRUE;
 }
 
 METHOD(tls_prf_t, get_bytes10, bool,

src/libtls/tls_prf.h

@@ -34,8 +34,9 @@ struct tls_prf_t {
 	 * Set the key of the PRF function.
 	 *
 	 * @param key		key to set
+	 * @return			TRUE if key set successfully
 	 */
-	void (*set_key)(tls_prf_t *this, chunk_t key);
+	bool (*set_key)(tls_prf_t *this, chunk_t key);
 
 	/**
 	 * Generate a series of bytes using a label and a seed.