fix for issue 1118: check if iv is zero in gcm.
1) found by roberto in mbedtls forum
2) if iv_len is zero, return an error
3) add tests for invalid parameters
diff --git a/tests/suites/test_suite_gcm.function b/tests/suites/test_suite_gcm.function
index 56c7e18..308e14b 100644
--- a/tests/suites/test_suite_gcm.function
+++ b/tests/suites/test_suite_gcm.function
@@ -8,6 +8,49 @@
*/
/* BEGIN_CASE */
+void gcm_bad_parameters( int cipher_id, int direction,
+ char *hex_key_string, char *hex_src_string,
+ char *hex_iv_string, char *hex_add_string,
+ int tag_len_bits, int gcm_result )
+{
+ unsigned char key_str[128];
+ unsigned char src_str[128];
+ unsigned char dst_str[257];
+ unsigned char iv_str[128];
+ unsigned char add_str[128];
+ unsigned char tag_str[128];
+ unsigned char output[128];
+ unsigned char tag_output[16];
+ mbedtls_gcm_context ctx;
+ unsigned int key_len;
+ size_t pt_len, iv_len, add_len, tag_len = tag_len_bits / 8;
+
+ mbedtls_gcm_init( &ctx );
+
+ memset( key_str, 0x00, sizeof( key_str ) );
+ memset( src_str, 0x00, sizeof( src_str ) );
+ memset( dst_str, 0x00, sizeof( dst_str ) );
+ memset( iv_str, 0x00, sizeof( iv_str ) );
+ memset( add_str, 0x00, sizeof( add_str ) );
+ memset( tag_str, 0x00, sizeof( tag_str ) );
+ memset( output, 0x00, sizeof( output ) );
+ memset( tag_output, 0x00, sizeof( tag_output ) );
+
+ key_len = unhexify( key_str, hex_key_string );
+ pt_len = unhexify( src_str, hex_src_string );
+ iv_len = unhexify( iv_str, hex_iv_string );
+ add_len = unhexify( add_str, hex_add_string );
+
+ TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str, key_len * 8 ) == 0 );
+ TEST_ASSERT( mbedtls_gcm_crypt_and_tag( &ctx, direction, pt_len, iv_str, iv_len,
+ add_str, add_len, src_str, output, tag_len, tag_output ) == gcm_result );
+
+exit:
+ mbedtls_gcm_free( &ctx );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
void gcm_encrypt_and_tag( int cipher_id,
char *hex_key_string, char *hex_src_string,
char *hex_iv_string, char *hex_add_string,
