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Add test cases for AES OFB block mode

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Adds test cases from NIST SP800-38A for OFB block mode to AES-128/192/256, for
the configuration of MBEDTLS_CIPHER_MODE_OFB.
This commit is contained in:
Simon Butcher 2018-04-22 22:57:58 +01:00
parent 76a5b22973
commit 0301884f00
3 changed files with 97 additions and 1 deletions
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52
tests/suites/test_suite_aes.function
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@ -289,6 +289,58 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_CIPHER_MODE_OFB */
void aes_encrypt_ofb( int fragment_size, char *hex_key_string,
char *hex_iv_string, char *hex_src_string,
char *hex_dst_string )
{
unsigned char key_str[100];
unsigned char iv_str[100];
unsigned char src_str[200];
unsigned char dst_str[200];
unsigned char output[200];
mbedtls_aes_context ctx;
size_t iv_offset = 0;
int in_buffer_len;
unsigned char* src_str_next;
int key_len, iv_len;
memset(key_str, 0x00, 100);
memset(iv_str, 0x00, 100);
memset(src_str, 0x00, 200);
memset(dst_str, 0x00, 200);
memset(output, 0x00, 200);
mbedtls_aes_init( &ctx );
key_len = unhexify( key_str, hex_key_string );
iv_len = unhexify( iv_str, hex_iv_string );
in_buffer_len = unhexify( src_str, hex_src_string );
mbedtls_aes_setkey_enc( &ctx, key_str, key_len * 8 );
src_str_next = src_str;
while( in_buffer_len > 0 )
{
TEST_ASSERT( mbedtls_aes_crypt_ofb( &ctx, fragment_size, &iv_offset,
iv_str, src_str_next, output ) == 0 );
hexify( dst_str, output, fragment_size );
TEST_ASSERT( strncmp( (char *) dst_str, hex_dst_string,
( 2 * fragment_size) ) == 0 );
in_buffer_len -= fragment_size;
hex_dst_string += ( fragment_size * 2 );
src_str_next += fragment_size;
if( in_buffer_len < fragment_size )
fragment_size = in_buffer_len;
}
exit:
mbedtls_aes_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void aes_selftest()
{