Add a return value to mac_t.set_key()

src/libstrongswan/crypto/mac.h

@@ -62,8 +62,10 @@ struct mac_t {
 	 * Any key length must be accepted.
 	 *
 	 * @param key		key to set
+	 * @return			TRUE if key set successfully
 	 */
-	void (*set_key) (mac_t *this, chunk_t key);
+	__attribute__((warn_unused_result))
+	bool (*set_key) (mac_t *this, chunk_t key);
 
 	/**
 	 * Destroys a mac_t object.

src/libstrongswan/crypto/prfs/mac_prf.c

@@ -68,8 +68,7 @@ METHOD(prf_t, get_key_size, size_t,
 METHOD(prf_t, set_key, bool,
 	private_prf_t *this, chunk_t key)
 {
-	this->mac->set_key(this->mac, key);
-	return TRUE;
+	return this->mac->set_key(this->mac, key);
 }
 
 METHOD(prf_t, destroy, void,

src/libstrongswan/crypto/signers/mac_signer.c

@@ -103,8 +103,7 @@ METHOD(signer_t, get_block_size, size_t,
 METHOD(signer_t, set_key, bool,
 	private_signer_t *this, chunk_t key)
 {
-	this->mac->set_key(this->mac, key);
-	return TRUE;
+	return this->mac->set_key(this->mac, key);
 }
 
 METHOD(signer_t, destroy, void,

src/libstrongswan/plugins/cmac/cmac.c

@@ -226,7 +226,7 @@ static void derive_key(chunk_t chunk)
 	}
 }
 
-METHOD(mac_t, set_key, void,
+METHOD(mac_t, set_key, bool,
 	private_mac_t *this, chunk_t key)
 {
 	chunk_t resized, iv, l;
@@ -240,8 +240,11 @@ METHOD(mac_t, set_key, void,
 	{	/* use cmac recursively to resize longer or shorter keys */
 		resized = chunk_alloca(this->b);
 		memset(resized.ptr, 0, resized.len);
-		set_key(this, resized);
-		get_mac(this, key, resized.ptr);
+		if (!set_key(this, resized) ||
+			!get_mac(this, key, resized.ptr))
+		{
+			return FALSE;
+		}
 	}
 
 	/*
@@ -267,6 +270,8 @@ METHOD(mac_t, set_key, void,
 	derive_key(l);
 	memcpy(this->k2, l.ptr, l.len);
 	memwipe(l.ptr, l.len);
+
+	return TRUE;
 }
 
 METHOD(mac_t, destroy, void,

src/libstrongswan/plugins/hmac/hmac.c

@@ -99,7 +99,7 @@ METHOD(mac_t, get_mac_size, size_t,
 	return this->h->get_hash_size(this->h);
 }
 
-METHOD(mac_t, set_key, void,
+METHOD(mac_t, set_key, bool,
 	private_mac_t *this, chunk_t key)
 {
 	int i;
@@ -128,6 +128,8 @@ METHOD(mac_t, set_key, void,
 	/* begin hashing of inner pad */
 	this->h->reset(this->h);
 	this->h->get_hash(this->h, this->ipaded_key, NULL);
+
+	return TRUE;
 }
 
 METHOD(mac_t, destroy, void,

src/libstrongswan/plugins/openssl/openssl_hmac.c

@@ -99,12 +99,12 @@ METHOD(mac_t, get_mac_size, size_t,
 	return EVP_MD_size(this->hasher);
 }
 
-METHOD(mac_t, set_key, void,
+METHOD(mac_t, set_key, bool,
 	private_mac_t *this, chunk_t key)
 {
 	chunk_clear(&this->key);
 	this->key = chunk_clone(key);
-	reset(this);
+	return reset(this);
 }
 
 METHOD(mac_t, destroy, void,

src/libstrongswan/plugins/xcbc/xcbc.c

@@ -198,7 +198,7 @@ METHOD(mac_t, get_mac_size, size_t,
 	return this->b;
 }
 
-METHOD(mac_t, set_key, void,
+METHOD(mac_t, set_key, bool,
 	private_mac_t *this, chunk_t key)
 {
 	chunk_t iv, k1, lengthened;
@@ -218,8 +218,11 @@ METHOD(mac_t, set_key, void,
 	{	/* shorten key using xcbc */
 		lengthened = chunk_alloca(this->b);
 		memset(lengthened.ptr, 0, lengthened.len);
-		set_key(this, lengthened);
-		get_mac(this, key, lengthened.ptr);
+		if (!set_key(this, lengthened) ||
+			!get_mac(this, key, lengthened.ptr))
+		{
+			return FALSE;
+		}
 	}
 
 	k1 = chunk_alloca(this->b);
@@ -243,6 +246,8 @@ METHOD(mac_t, set_key, void,
 	this->k1->set_key(this->k1, k1);
 
 	memwipe(k1.ptr, k1.len);
+
+	return TRUE;
 }
 
 METHOD(mac_t, destroy, void,