246 lines
9.1 KiB
C
246 lines
9.1 KiB
C
/* BEGIN_HEADER */
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#include "lmots.h"
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#include "mbedtls/lms.h"
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#if defined(MBEDTLS_TEST_HOOKS)
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int check_lmots_private_key_for_leak(unsigned char *sig)
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{
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size_t idx;
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for (idx = MBEDTLS_LMOTS_SIG_SIGNATURE_OFFSET(MBEDTLS_LMOTS_SHA256_N32_W8);
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idx < MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8);
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idx++) {
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TEST_EQUAL(sig[idx], 0x7E);
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}
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return 0;
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exit:
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return -1;
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}
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#endif /* defined(MBEDTLS_TEST_HOOKS) */
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_LMS_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
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void lmots_sign_verify_test(data_t *msg, data_t *key_id, int leaf_id,
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data_t *seed)
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{
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mbedtls_lmots_public_t pub_ctx;
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mbedtls_lmots_private_t priv_ctx;
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unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
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mbedtls_lmots_public_init(&pub_ctx);
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mbedtls_lmots_private_init(&priv_ctx);
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TEST_EQUAL(mbedtls_lmots_generate_private_key(&priv_ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
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key_id->x, leaf_id, seed->x, seed->len), 0);
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TEST_EQUAL(mbedtls_lmots_calculate_public_key(&pub_ctx, &priv_ctx), 0);
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TEST_EQUAL(mbedtls_lmots_sign(&priv_ctx, &mbedtls_test_rnd_std_rand, NULL,
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msg->x, msg->len, sig, sizeof(sig), NULL), 0);
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TEST_EQUAL(mbedtls_lmots_verify(&pub_ctx, msg->x, msg->len, sig, sizeof(sig)), 0);
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exit:
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mbedtls_lmots_public_free(&pub_ctx);
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mbedtls_lmots_private_free(&priv_ctx);
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
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void lmots_sign_verify_null_msg_test(data_t *key_id, int leaf_id, data_t *seed)
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{
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mbedtls_lmots_public_t pub_ctx;
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mbedtls_lmots_private_t priv_ctx;
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unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
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mbedtls_lmots_public_init(&pub_ctx);
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mbedtls_lmots_private_init(&priv_ctx);
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TEST_EQUAL(mbedtls_lmots_generate_private_key(&priv_ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
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key_id->x, leaf_id, seed->x, seed->len), 0);
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TEST_EQUAL(mbedtls_lmots_calculate_public_key(&pub_ctx, &priv_ctx), 0);
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TEST_EQUAL(mbedtls_lmots_sign(&priv_ctx, &mbedtls_test_rnd_std_rand, NULL,
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NULL, 0, sig, sizeof(sig), NULL), 0);
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TEST_EQUAL(mbedtls_lmots_verify(&pub_ctx, NULL, 0, sig, sizeof(sig)), 0);
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exit:
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mbedtls_lmots_public_free(&pub_ctx);
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mbedtls_lmots_private_free(&priv_ctx);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void lmots_verify_test(data_t *msg, data_t *sig, data_t *pub_key,
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int expected_rc)
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{
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mbedtls_lmots_public_t ctx;
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unsigned int size;
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unsigned char *tmp_sig = NULL;
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mbedtls_lmots_public_init(&ctx);
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TEST_EQUAL(mbedtls_lmots_import_public_key(&ctx, pub_key->x, pub_key->len), 0);
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len), expected_rc);
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/* Test negative cases if the input data is valid */
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if (expected_rc == 0) {
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if (msg->len >= 1) {
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/* Altering first message byte must cause verification failure */
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msg->x[0] ^= 1;
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
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MBEDTLS_ERR_LMS_VERIFY_FAILED);
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msg->x[0] ^= 1;
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/* Altering last message byte must cause verification failure */
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msg->x[msg->len - 1] ^= 1;
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
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MBEDTLS_ERR_LMS_VERIFY_FAILED);
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msg->x[msg->len - 1] ^= 1;
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}
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/* Altering first signature byte must cause verification failure */
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sig->x[0] ^= 1;
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
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MBEDTLS_ERR_LMS_VERIFY_FAILED);
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sig->x[0] ^= 1;
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/* Altering last signature byte must cause verification failure */
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sig->x[sig->len - 1] ^= 1;
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, sig->x, sig->len),
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MBEDTLS_ERR_LMS_VERIFY_FAILED);
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sig->x[sig->len - 1] ^= 1;
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/* Signatures of all sizes must not verify, whether shorter or longer */
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for (size = 0; size < sig->len; size++) {
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if (size == sig->len) {
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continue;
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}
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ASSERT_ALLOC(tmp_sig, size);
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if (tmp_sig != NULL) {
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memcpy(tmp_sig, sig->x, MIN(size, sig->len));
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}
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TEST_EQUAL(mbedtls_lmots_verify(&ctx, msg->x, msg->len, tmp_sig, size),
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MBEDTLS_ERR_LMS_VERIFY_FAILED);
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mbedtls_free(tmp_sig);
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tmp_sig = NULL;
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}
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}
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exit:
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mbedtls_free(tmp_sig);
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mbedtls_lmots_public_free(&ctx);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void lmots_import_export_test(data_t *pub_key, int expected_import_rc)
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{
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mbedtls_lmots_public_t ctx;
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unsigned char *exported_pub_key = NULL;
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size_t exported_pub_key_buf_size;
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size_t exported_pub_key_size;
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mbedtls_lmots_public_init(&ctx);
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TEST_EQUAL(mbedtls_lmots_import_public_key(&ctx, pub_key->x, pub_key->len),
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expected_import_rc);
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if (expected_import_rc == 0) {
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exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8);
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ASSERT_ALLOC(exported_pub_key, exported_pub_key_buf_size);
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TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
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exported_pub_key_buf_size,
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&exported_pub_key_size), 0);
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TEST_EQUAL(exported_pub_key_size,
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MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8));
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ASSERT_COMPARE(pub_key->x, pub_key->len,
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exported_pub_key, exported_pub_key_size);
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mbedtls_free(exported_pub_key);
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exported_pub_key = NULL;
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/* Export into too-small buffer should fail */
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exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8) - 1;
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ASSERT_ALLOC(exported_pub_key, exported_pub_key_buf_size);
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TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
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exported_pub_key_buf_size, NULL),
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MBEDTLS_ERR_LMS_BUFFER_TOO_SMALL);
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mbedtls_free(exported_pub_key);
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exported_pub_key = NULL;
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/* Export into too-large buffer should succeed */
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exported_pub_key_buf_size = MBEDTLS_LMOTS_PUBLIC_KEY_LEN(MBEDTLS_LMOTS_SHA256_N32_W8) + 1;
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ASSERT_ALLOC(exported_pub_key, exported_pub_key_buf_size);
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TEST_EQUAL(mbedtls_lmots_export_public_key(&ctx, exported_pub_key,
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exported_pub_key_buf_size,
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&exported_pub_key_size),
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0);
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ASSERT_COMPARE(pub_key->x, pub_key->len,
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exported_pub_key, exported_pub_key_size);
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mbedtls_free(exported_pub_key);
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exported_pub_key = NULL;
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}
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exit:
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mbedtls_lmots_public_free(&ctx);
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mbedtls_free(exported_pub_key);
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_LMS_PRIVATE */
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void lmots_reuse_test(data_t *msg, data_t *key_id, int leaf_id, data_t *seed)
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{
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mbedtls_lmots_private_t ctx;
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unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
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mbedtls_lmots_private_init(&ctx);
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TEST_EQUAL(mbedtls_lmots_generate_private_key(&ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
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key_id->x, leaf_id, seed->x,
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seed->len), 0);
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TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
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msg->x, msg->len, sig, sizeof(sig), NULL), 0);
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/* Running another sign operation should fail, since the key should now have
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* been erased.
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*/
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TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
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msg->x, msg->len, sig, sizeof(sig), NULL),
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MBEDTLS_ERR_LMS_BAD_INPUT_DATA);
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exit:
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mbedtls_lmots_private_free(&ctx);
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS:MBEDTLS_LMS_PRIVATE */
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void lmots_signature_leak_test(data_t *msg, data_t *key_id, int leaf_id,
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data_t *seed)
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{
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mbedtls_lmots_private_t ctx;
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unsigned char sig[MBEDTLS_LMOTS_SIG_LEN(MBEDTLS_LMOTS_SHA256_N32_W8)];
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mbedtls_lmots_sign_private_key_invalidated_hook = &check_lmots_private_key_for_leak;
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/* Fill with recognisable pattern */
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memset(sig, 0x7E, sizeof(sig));
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mbedtls_lmots_private_init(&ctx);
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TEST_EQUAL(mbedtls_lmots_generate_private_key(&ctx, MBEDTLS_LMOTS_SHA256_N32_W8,
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key_id->x, leaf_id, seed->x,
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seed->len), 0);
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TEST_EQUAL(mbedtls_lmots_sign(&ctx, mbedtls_test_rnd_std_rand, NULL,
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msg->x, msg->len, sig, sizeof(sig), NULL), 0);
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exit:
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mbedtls_lmots_private_free(&ctx);
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mbedtls_lmots_sign_private_key_invalidated_hook = NULL;
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}
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/* END_CASE */
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