462 lines
15 KiB
C
462 lines
15 KiB
C
/* BEGIN_HEADER */
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#include "mbedtls/gcm.h"
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/* Use the multipart interface to process the encrypted data in two parts
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* and check that the output matches the expected output.
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* The context must have been set up with the key. */
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static int check_multipart( mbedtls_gcm_context *ctx,
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int mode,
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const data_t *iv,
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const data_t *add,
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const data_t *input,
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const data_t *expected_output,
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const data_t *tag,
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size_t n1,
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size_t n1_add)
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{
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int ok = 0;
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uint8_t *output = NULL;
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size_t n2 = input->len - n1;
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size_t n2_add = add->len - n1_add;
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size_t olen;
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/* Sanity checks on the test data */
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TEST_ASSERT( n1 <= input->len );
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TEST_ASSERT( n1_add <= add->len );
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TEST_EQUAL( input->len, expected_output->len );
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TEST_EQUAL( 0, mbedtls_gcm_starts( ctx, mode,
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iv->x, iv->len ) );
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TEST_EQUAL( 0, mbedtls_gcm_update_ad( ctx, add->x, n1_add ) );
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TEST_EQUAL( 0, mbedtls_gcm_update_ad( ctx, add->x + n1_add, n2_add ) );
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/* Allocate a tight buffer for each update call. This way, if the function
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* tries to write beyond the advertised required buffer size, this will
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* count as an overflow for memory sanitizers and static checkers. */
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ASSERT_ALLOC( output, n1 );
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olen = 0xdeadbeef;
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TEST_EQUAL( 0, mbedtls_gcm_update( ctx, input->x, n1, output, n1, &olen ) );
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TEST_EQUAL( n1, olen );
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ASSERT_COMPARE( output, olen, expected_output->x, n1 );
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mbedtls_free( output );
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output = NULL;
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ASSERT_ALLOC( output, n2 );
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olen = 0xdeadbeef;
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TEST_EQUAL( 0, mbedtls_gcm_update( ctx, input->x + n1, n2, output, n2, &olen ) );
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TEST_EQUAL( n2, olen );
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ASSERT_COMPARE( output, olen, expected_output->x + n1, n2 );
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mbedtls_free( output );
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output = NULL;
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ASSERT_ALLOC( output, tag->len );
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TEST_EQUAL( 0, mbedtls_gcm_finish( ctx, NULL, 0, &olen, output, tag->len ) );
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TEST_EQUAL( 0, olen );
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ASSERT_COMPARE( output, tag->len, tag->x, tag->len );
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mbedtls_free( output );
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output = NULL;
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ok = 1;
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exit:
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mbedtls_free( output );
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return( ok );
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}
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static void check_cipher_with_empty_ad( mbedtls_gcm_context *ctx,
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int mode,
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const data_t *iv,
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const data_t *input,
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const data_t *expected_output,
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const data_t *tag,
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size_t ad_update_count)
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{
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size_t n;
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uint8_t *output = NULL;
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size_t olen;
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/* Sanity checks on the test data */
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TEST_EQUAL( input->len, expected_output->len );
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TEST_EQUAL( 0, mbedtls_gcm_starts( ctx, mode,
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iv->x, iv->len ) );
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for( n = 0; n < ad_update_count; n++ )
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{
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TEST_EQUAL( 0, mbedtls_gcm_update_ad( ctx, NULL, 0 ) );
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}
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/* Allocate a tight buffer for each update call. This way, if the function
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* tries to write beyond the advertised required buffer size, this will
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* count as an overflow for memory sanitizers and static checkers. */
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ASSERT_ALLOC( output, input->len );
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olen = 0xdeadbeef;
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TEST_EQUAL( 0, mbedtls_gcm_update( ctx, input->x, input->len, output, input->len, &olen ) );
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TEST_EQUAL( input->len, olen );
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ASSERT_COMPARE( output, olen, expected_output->x, input->len );
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mbedtls_free( output );
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output = NULL;
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ASSERT_ALLOC( output, tag->len );
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TEST_EQUAL( 0, mbedtls_gcm_finish( ctx, NULL, 0, &olen, output, tag->len ) );
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TEST_EQUAL( 0, olen );
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ASSERT_COMPARE( output, tag->len, tag->x, tag->len );
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exit:
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mbedtls_free( output );
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}
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static void check_empty_cipher_with_ad( mbedtls_gcm_context *ctx,
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int mode,
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const data_t *iv,
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const data_t *add,
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const data_t *tag,
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size_t cipher_update_count)
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{
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size_t olen;
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size_t n;
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uint8_t* output_tag = NULL;
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TEST_EQUAL( 0, mbedtls_gcm_starts( ctx, mode, iv->x, iv->len ) );
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TEST_EQUAL( 0, mbedtls_gcm_update_ad( ctx, add->x, add->len ) );
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for( n = 0; n < cipher_update_count; n++ )
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{
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olen = 0xdeadbeef;
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TEST_EQUAL( 0, mbedtls_gcm_update( ctx, NULL, 0, NULL, 0, &olen ) );
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TEST_EQUAL( 0, olen );
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}
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ASSERT_ALLOC( output_tag, tag->len );
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TEST_EQUAL( 0, mbedtls_gcm_finish( ctx, NULL, 0, &olen,
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output_tag, tag->len ) );
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TEST_EQUAL( 0, olen );
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ASSERT_COMPARE( output_tag, tag->len, tag->x, tag->len );
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exit:
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mbedtls_free( output_tag );
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}
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static void check_no_cipher_no_ad( mbedtls_gcm_context *ctx,
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int mode,
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const data_t *iv,
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const data_t *tag )
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{
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uint8_t *output = NULL;
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size_t olen = 0;
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TEST_EQUAL( 0, mbedtls_gcm_starts( ctx, mode,
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iv->x, iv->len ) );
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ASSERT_ALLOC( output, tag->len );
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TEST_EQUAL( 0, mbedtls_gcm_finish( ctx, NULL, 0, &olen, output, tag->len ) );
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TEST_EQUAL( 0, olen );
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ASSERT_COMPARE( output, tag->len, tag->x, tag->len );
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exit:
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mbedtls_free( output );
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}
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_GCM_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE */
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void gcm_bad_parameters( int cipher_id, int direction,
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data_t *key_str, data_t *src_str,
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data_t *iv_str, data_t *add_str,
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int tag_len_bits, int gcm_result )
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{
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unsigned char output[128];
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unsigned char tag_output[16];
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mbedtls_gcm_context ctx;
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size_t tag_len = tag_len_bits / 8;
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mbedtls_gcm_init( &ctx );
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memset( output, 0x00, sizeof( output ) );
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memset( tag_output, 0x00, sizeof( tag_output ) );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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TEST_ASSERT( mbedtls_gcm_crypt_and_tag( &ctx, direction, src_str->len, iv_str->x, iv_str->len,
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add_str->x, add_str->len, src_str->x, output, tag_len, tag_output ) == gcm_result );
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_encrypt_and_tag( int cipher_id, data_t * key_str,
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data_t * src_str, data_t * iv_str,
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data_t * add_str, data_t * dst,
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int tag_len_bits, data_t * tag,
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int init_result )
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{
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unsigned char output[128];
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unsigned char tag_output[16];
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mbedtls_gcm_context ctx;
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size_t tag_len = tag_len_bits / 8;
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size_t n1;
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size_t n1_add;
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mbedtls_gcm_init( &ctx );
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memset(output, 0x00, 128);
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memset(tag_output, 0x00, 16);
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == init_result );
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if( init_result == 0 )
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{
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TEST_ASSERT( mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT, src_str->len, iv_str->x, iv_str->len, add_str->x, add_str->len, src_str->x, output, tag_len, tag_output ) == 0 );
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ASSERT_COMPARE( output, src_str->len, dst->x, dst->len );
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ASSERT_COMPARE( tag_output, tag_len, tag->x, tag->len );
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for( n1 = 0; n1 <= src_str->len; n1 += 1 )
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{
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for( n1_add = 0; n1_add <= add_str->len; n1_add += 1 )
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{
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mbedtls_test_set_step( n1 * 10000 + n1_add );
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if( !check_multipart( &ctx, MBEDTLS_GCM_ENCRYPT,
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iv_str, add_str, src_str,
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dst, tag,
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n1, n1_add ) )
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goto exit;
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}
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}
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}
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_decrypt_and_verify( int cipher_id, data_t * key_str,
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data_t * src_str, data_t * iv_str,
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data_t * add_str, int tag_len_bits,
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data_t * tag_str, char * result,
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data_t * pt_result, int init_result )
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{
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unsigned char output[128];
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mbedtls_gcm_context ctx;
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int ret;
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size_t tag_len = tag_len_bits / 8;
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size_t n1;
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size_t n1_add;
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mbedtls_gcm_init( &ctx );
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memset(output, 0x00, 128);
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == init_result );
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if( init_result == 0 )
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{
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ret = mbedtls_gcm_auth_decrypt( &ctx, src_str->len, iv_str->x, iv_str->len, add_str->x, add_str->len, tag_str->x, tag_len, src_str->x, output );
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if( strcmp( "FAIL", result ) == 0 )
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{
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TEST_ASSERT( ret == MBEDTLS_ERR_GCM_AUTH_FAILED );
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}
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else
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{
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TEST_ASSERT( ret == 0 );
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ASSERT_COMPARE( output, src_str->len, pt_result->x, pt_result->len );
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for( n1 = 0; n1 <= src_str->len; n1 += 1 )
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{
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for( n1_add = 0; n1_add <= add_str->len; n1_add += 1 )
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{
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mbedtls_test_set_step( n1 * 10000 + n1_add );
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if( !check_multipart( &ctx, MBEDTLS_GCM_DECRYPT,
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iv_str, add_str, src_str,
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pt_result, tag_str,
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n1, n1_add ) )
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goto exit;
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}
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}
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}
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}
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_decrypt_and_verify_empty_cipher( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * add_str,
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data_t * tag_str,
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int cipher_update_calls )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_empty_cipher_with_ad( &ctx, MBEDTLS_GCM_DECRYPT,
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iv_str, add_str, tag_str,
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cipher_update_calls );
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_decrypt_and_verify_empty_ad( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * src_str,
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data_t * tag_str,
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data_t * pt_result,
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int ad_update_calls )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_cipher_with_empty_ad( &ctx, MBEDTLS_GCM_DECRYPT,
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iv_str, src_str, pt_result, tag_str,
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ad_update_calls );
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_decrypt_and_verify_no_ad_no_cipher( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * tag_str )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_no_cipher_no_ad( &ctx, MBEDTLS_GCM_DECRYPT,
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iv_str, tag_str );
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_encrypt_and_tag_empty_cipher( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * add_str,
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data_t * tag_str,
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int cipher_update_calls )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_empty_cipher_with_ad( &ctx, MBEDTLS_GCM_ENCRYPT,
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iv_str, add_str, tag_str,
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cipher_update_calls );
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_encrypt_and_tag_empty_ad( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * src_str,
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data_t * dst,
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data_t * tag_str,
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int ad_update_calls )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_cipher_with_empty_ad( &ctx, MBEDTLS_GCM_ENCRYPT,
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iv_str, src_str, dst, tag_str,
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ad_update_calls );
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_encrypt_and_verify_no_ad_no_cipher( int cipher_id,
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data_t * key_str,
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data_t * iv_str,
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data_t * tag_str )
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{
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mbedtls_gcm_context ctx;
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mbedtls_gcm_init( &ctx );
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TEST_ASSERT( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ) == 0 );
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check_no_cipher_no_ad( &ctx, MBEDTLS_GCM_ENCRYPT,
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iv_str, tag_str );
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_invalid_param( )
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{
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mbedtls_gcm_context ctx;
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unsigned char valid_buffer[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
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mbedtls_cipher_id_t valid_cipher = MBEDTLS_CIPHER_ID_AES;
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int invalid_bitlen = 1;
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mbedtls_gcm_init( &ctx );
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/* mbedtls_gcm_setkey */
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TEST_EQUAL(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_setkey( &ctx, valid_cipher, valid_buffer, invalid_bitlen ) );
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exit:
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void gcm_update_output_buffer_too_small( int cipher_id, int mode,
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data_t * key_str, const data_t *input,
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const data_t *iv )
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{
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mbedtls_gcm_context ctx;
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uint8_t *output = NULL;
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size_t olen = 0;
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size_t output_len = input->len - 1;
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mbedtls_gcm_init( &ctx );
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TEST_EQUAL( mbedtls_gcm_setkey( &ctx, cipher_id, key_str->x, key_str->len * 8 ), 0 );
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TEST_EQUAL( 0, mbedtls_gcm_starts( &ctx, mode, iv->x, iv->len ) );
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ASSERT_ALLOC( output, output_len );
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TEST_EQUAL( MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL, mbedtls_gcm_update( &ctx, input->x, input->len, output, output_len, &olen ) );
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exit:
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mbedtls_free( output );
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mbedtls_gcm_free( &ctx );
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST:MBEDTLS_AES_C */
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void gcm_selftest( )
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{
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TEST_ASSERT( mbedtls_gcm_self_test( 1 ) == 0 );
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}
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/* END_CASE */
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