mbedtls/tests/suites/test_suite_gcm.function

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/* BEGIN_HEADER */
#include <polarssl/gcm.h>
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:POLARSSL_GCM_C
* END_DEPENDENCIES
*/
/* 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,
char *hex_dst_string, int tag_len_bits,
char *hex_tag_string, int init_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];
gcm_context ctx;
unsigned int key_len;
size_t pt_len, iv_len, add_len, tag_len = tag_len_bits / 8;
memset(key_str, 0x00, 128);
memset(src_str, 0x00, 128);
memset(dst_str, 0x00, 257);
memset(iv_str, 0x00, 128);
memset(add_str, 0x00, 128);
memset(tag_str, 0x00, 128);
memset(output, 0x00, 128);
memset(tag_output, 0x00, 16);
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( gcm_init( &ctx, cipher_id, key_str, key_len * 8 ) == init_result );
if( init_result == 0 )
{
TEST_ASSERT( gcm_crypt_and_tag( &ctx, GCM_ENCRYPT, pt_len, iv_str, iv_len, add_str, add_len, src_str, output, tag_len, tag_output ) == 0 );
hexify( dst_str, output, pt_len );
hexify( tag_str, tag_output, tag_len );
TEST_ASSERT( strcmp( (char *) dst_str, hex_dst_string ) == 0 );
TEST_ASSERT( strcmp( (char *) tag_str, hex_tag_string ) == 0 );
}
exit:
gcm_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE */
void gcm_decrypt_and_verify( int cipher_id,
char *hex_key_string, char *hex_src_string,
char *hex_iv_string, char *hex_add_string,
int tag_len_bits, char *hex_tag_string,
char *pt_result, int init_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];
gcm_context ctx;
unsigned int key_len;
size_t pt_len, iv_len, add_len, tag_len = tag_len_bits / 8;
int ret;
memset(key_str, 0x00, 128);
memset(src_str, 0x00, 128);
memset(dst_str, 0x00, 257);
memset(iv_str, 0x00, 128);
memset(add_str, 0x00, 128);
memset(tag_str, 0x00, 128);
memset(output, 0x00, 128);
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 );
unhexify( tag_str, hex_tag_string );
TEST_ASSERT( gcm_init( &ctx, cipher_id, key_str, key_len * 8 ) == init_result );
if( init_result == 0 )
{
ret = gcm_auth_decrypt( &ctx, pt_len, iv_str, iv_len, add_str, add_len, tag_str, tag_len, src_str, output );
if( strcmp( "FAIL", pt_result ) == 0 )
{
TEST_ASSERT( ret == POLARSSL_ERR_GCM_AUTH_FAILED );
}
else
{
TEST_ASSERT( ret == 0 );
hexify( dst_str, output, pt_len );
TEST_ASSERT( strcmp( (char *) dst_str, pt_result ) == 0 );
}
}
exit:
gcm_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */
void gcm_selftest()
{
TEST_ASSERT( gcm_self_test( 0 ) == 0 );
}
/* END_CASE */