Use IV length of a crypter instead of block size for IV calculations

src/libstrongswan/crypto/crypto_tester.c

@@ -121,7 +121,7 @@ static bool test_crypter(private_crypto_tester_t *this,
 
 		key = chunk_create(vector->key, crypter->get_key_size(crypter));
 		crypter->set_key(crypter, key);
-		iv = chunk_create(vector->iv, crypter->get_block_size(crypter));
+		iv = chunk_create(vector->iv, crypter->get_iv_size(crypter));
 
 		/* allocated encryption */
 		plain = chunk_create(vector->plain, vector->len);

src/libstrongswan/crypto/pkcs7.c

@@ -559,7 +559,7 @@ static bool parse_envelopedData(private_pkcs7_t *this, chunk_t serialNumber,
 						DBG1(DBG_LIB, "IV could not be parsed");
 						goto end;
 					}
-					if (iv.len != crypter->get_block_size(crypter))
+					if (iv.len != crypter->get_iv_size(crypter))
 					{
 						DBG1(DBG_LIB, "IV has wrong length");
 						goto end;
@@ -752,7 +752,7 @@ bool build_envelopedData(private_pkcs7_t *this, x509_t *cert,
 		rng->destroy(rng);
 
 		rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
-		rng->allocate_bytes(rng, crypter->get_block_size(crypter), &iv);
+		rng->allocate_bytes(rng, crypter->get_iv_size(crypter), &iv);
 		DBG4(DBG_LIB, "  initialization vector: %B", &iv);
 		rng->destroy(rng);
 	}

src/libstrongswan/plugins/pem/pem_builder.c

@@ -127,8 +127,8 @@ static status_t pem_decrypt(chunk_t *blob, encryption_algorithm_t alg,
 	}
 	crypter->set_key(crypter, key);
 
-	if (iv.len != crypter->get_block_size(crypter) ||
-		blob->len % iv.len)
+	if (iv.len != crypter->get_iv_size(crypter) ||
+		blob->len % crypter->get_block_size(crypter))
 	{
 		crypter->destroy(crypter);
 		DBG1(DBG_LIB, "  data size is not multiple of block size");