466 lines
15 KiB
C
466 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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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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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,
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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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TEST_ASSERT(mbedtls_gcm_crypt_and_tag(&ctx, MBEDTLS_GCM_ENCRYPT, src_str->len, iv_str->x,
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iv_str->len, add_str->x, add_str->len, src_str->x,
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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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for (n1_add = 0; n1_add <= add_str->len; n1_add += 1) {
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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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}
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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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ret = mbedtls_gcm_auth_decrypt(&ctx,
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src_str->len,
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iv_str->x,
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iv_str->len,
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add_str->x,
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add_str->len,
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tag_str->x,
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tag_len,
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src_str->x,
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output);
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if (strcmp("FAIL", result) == 0) {
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TEST_ASSERT(ret == MBEDTLS_ERR_GCM_AUTH_FAILED);
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} else {
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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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for (n1_add = 0; n1_add <= add_str->len; n1_add += 1) {
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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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}
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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,
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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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