diff options
Diffstat (limited to 'src/lib/tests/crypt_test.c')
| -rw-r--r-- | src/lib/tests/crypt_test.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/lib/tests/crypt_test.c b/src/lib/tests/crypt_test.c index 906059be..a24cde66 100644 --- a/src/lib/tests/crypt_test.c +++ b/src/lib/tests/crypt_test.c @@ -254,6 +254,182 @@ static int test_md_nid_values(void) } #endif +static int test_key_rotation(void) +{ + uint8_t pkt[TEST_PACKET_SIZE]; + struct crypt_ctx * tx_ctx; + struct crypt_ctx * rx_ctx; + uint8_t key[SYMMKEYSZ]; + struct crypt_sk sk = { + .nid = NID_aes_256_gcm, + .key = key + }; + buffer_t in; + buffer_t enc; + buffer_t dec; + uint32_t i; + uint32_t threshold; + + TEST_START(); + + if (random_buffer(key, sizeof(key)) < 0) { + printf("Failed to generate random key.\n"); + goto fail; + } + + if (random_buffer(pkt, sizeof(pkt)) < 0) { + printf("Failed to generate random data.\n"); + goto fail; + } + + tx_ctx = crypt_create_ctx(&sk); + if (tx_ctx == NULL) { + printf("Failed to create TX context.\n"); + goto fail; + } + + rx_ctx = crypt_create_ctx(&sk); + if (rx_ctx == NULL) { + printf("Failed to create RX context.\n"); + goto fail_tx; + } + + in.len = sizeof(pkt); + in.data = pkt; + + threshold = (1U << TEST_KEY_ROTATION_BIT); + + /* Encrypt and decrypt across multiple rotations */ + for (i = 0; i < threshold * 3; i++) { + if (crypt_encrypt(tx_ctx, in, &enc) < 0) { + printf("Encryption failed at packet %u.\n", i); + goto fail_rx; + } + + if (crypt_decrypt(rx_ctx, enc, &dec) < 0) { + printf("Decryption failed at packet %u.\n", i); + freebuf(enc); + goto fail_rx; + } + + if (dec.len != in.len || + memcmp(in.data, dec.data, in.len) != 0) { + printf("Data mismatch at packet %u.\n", i); + freebuf(dec); + freebuf(enc); + goto fail_rx; + } + + freebuf(dec); + freebuf(enc); + } + + crypt_destroy_ctx(rx_ctx); + crypt_destroy_ctx(tx_ctx); + + TEST_SUCCESS(); + + return TEST_RC_SUCCESS; + fail_rx: + crypt_destroy_ctx(rx_ctx); + fail_tx: + crypt_destroy_ctx(tx_ctx); + fail: + TEST_FAIL(); + return TEST_RC_FAIL; +} + +static int test_key_phase_bit(void) +{ + uint8_t pkt[TEST_PACKET_SIZE]; + struct crypt_ctx * ctx; + uint8_t key[SYMMKEYSZ]; + struct crypt_sk sk = { + .nid = NID_aes_256_gcm, + .key = key + }; + buffer_t in; + buffer_t out; + uint32_t count; + uint32_t threshold; + uint8_t phase_before; + uint8_t phase_after; + int ivsz; + + TEST_START(); + + if (random_buffer(key, sizeof(key)) < 0) { + printf("Failed to generate random key.\n"); + goto fail; + } + + if (random_buffer(pkt, sizeof(pkt)) < 0) { + printf("Failed to generate random data.\n"); + goto fail; + } + + ctx = crypt_create_ctx(&sk); + if (ctx == NULL) { + printf("Failed to initialize cryptography.\n"); + goto fail; + } + + ivsz = crypt_get_ivsz(ctx); + if (ivsz <= 0) { + printf("Invalid IV size.\n"); + goto fail_ctx; + } + + in.len = sizeof(pkt); + in.data = pkt; + + /* Encrypt packets up to just before rotation threshold */ + threshold = (1U << KEY_ROTATION_BIT); + + /* Encrypt threshold - 1 packets (indices 0 to threshold-2) */ + for (count = 0; count < threshold - 1; count++) { + if (crypt_encrypt(ctx, in, &out) < 0) { + printf("Encryption failed at count %u.\n", count); + goto fail_ctx; + } + freebuf(out); + } + + /* Packet at index threshold-1: phase should still be initial */ + if (crypt_encrypt(ctx, in, &out) < 0) { + printf("Encryption failed before rotation.\n"); + goto fail_ctx; + } + phase_before = (out.data[0] & 0x80) ? 1 : 0; + freebuf(out); + + /* Packet at index threshold: phase should have toggled */ + if (crypt_encrypt(ctx, in, &out) < 0) { + printf("Encryption failed at rotation threshold.\n"); + goto fail_ctx; + } + phase_after = (out.data[0] & 0x80) ? 1 : 0; + freebuf(out); + + /* Phase bit should have toggled */ + if (phase_before == phase_after) { + printf("Phase bit did not toggle: before=%u, after=%u.\n", + phase_before, phase_after); + goto fail_ctx; + } + + crypt_destroy_ctx(ctx); + + TEST_SUCCESS(); + + return TEST_RC_SUCCESS; + fail_ctx: + crypt_destroy_ctx(ctx); + fail: + TEST_FAIL(); + return TEST_RC_FAIL; +} + int crypt_test(int argc, char ** argv) { @@ -264,6 +440,8 @@ int crypt_test(int argc, ret |= test_crypt_create_destroy(); ret |= test_encrypt_decrypt_all(); + ret |= test_key_rotation(); + ret |= test_key_phase_bit(); #ifdef HAVE_OPENSSL ret |= test_cipher_nid_values(); ret |= test_md_nid_values(); |