466 lines
16 KiB
C
466 lines
16 KiB
C
/* BEGIN_HEADER */
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#include "mbedtls/ecdh.h"
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static int load_public_key(int grp_id, data_t *point,
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mbedtls_ecp_keypair *ecp)
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{
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int ok = 0;
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TEST_ASSERT(mbedtls_ecp_group_load(&ecp->grp, grp_id) == 0);
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TEST_ASSERT(mbedtls_ecp_point_read_binary(&ecp->grp,
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&ecp->Q,
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point->x,
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point->len) == 0);
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TEST_ASSERT(mbedtls_ecp_check_pubkey(&ecp->grp,
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&ecp->Q) == 0);
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ok = 1;
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exit:
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return ok;
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}
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static int load_private_key(int grp_id, data_t *private_key,
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mbedtls_ecp_keypair *ecp,
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mbedtls_test_rnd_pseudo_info *rnd_info)
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{
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int ok = 0;
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TEST_ASSERT(mbedtls_ecp_read_key(grp_id, ecp,
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private_key->x,
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private_key->len) == 0);
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TEST_ASSERT(mbedtls_ecp_check_privkey(&ecp->grp, &ecp->d) == 0);
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/* Calculate the public key from the private key. */
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TEST_ASSERT(mbedtls_ecp_mul(&ecp->grp, &ecp->Q, &ecp->d,
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&ecp->grp.G,
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&mbedtls_test_rnd_pseudo_rand,
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rnd_info) == 0);
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ok = 1;
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exit:
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return ok;
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}
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/* END_HEADER */
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/* BEGIN_DEPENDENCIES
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* depends_on:MBEDTLS_ECDH_C
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* END_DEPENDENCIES
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*/
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/* BEGIN_CASE */
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void ecdh_invalid_param()
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{
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mbedtls_ecdh_context ctx;
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mbedtls_ecp_keypair kp;
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int invalid_side = 42;
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mbedtls_ecdh_init(&ctx);
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mbedtls_ecp_keypair_init(&kp);
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TEST_EQUAL(MBEDTLS_ERR_ECP_BAD_INPUT_DATA,
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mbedtls_ecdh_get_params(&ctx, &kp,
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invalid_side));
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exit:
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return;
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdh_primitive_random(int id)
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{
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mbedtls_ecp_group grp;
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mbedtls_ecp_point qA, qB;
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mbedtls_mpi dA, dB, zA, zB;
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mbedtls_test_rnd_pseudo_info rnd_info;
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mbedtls_ecp_group_init(&grp);
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mbedtls_ecp_point_init(&qA); mbedtls_ecp_point_init(&qB);
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mbedtls_mpi_init(&dA); mbedtls_mpi_init(&dB);
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mbedtls_mpi_init(&zA); mbedtls_mpi_init(&zB);
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memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
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TEST_ASSERT(mbedtls_ecp_group_load(&grp, id) == 0);
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TEST_ASSERT(mbedtls_ecdh_gen_public(&grp, &dA, &qA,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_gen_public(&grp, &dB, &qB,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_compute_shared(&grp, &zA, &qB, &dA,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_compute_shared(&grp, &zB, &qA, &dB,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&zA, &zB) == 0);
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exit:
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mbedtls_ecp_group_free(&grp);
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mbedtls_ecp_point_free(&qA); mbedtls_ecp_point_free(&qB);
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mbedtls_mpi_free(&dA); mbedtls_mpi_free(&dB);
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mbedtls_mpi_free(&zA); mbedtls_mpi_free(&zB);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdh_primitive_testvec(int id, data_t *rnd_buf_A, char *xA_str,
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char *yA_str, data_t *rnd_buf_B,
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char *xB_str, char *yB_str, char *z_str)
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{
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mbedtls_ecp_group grp;
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mbedtls_ecp_point qA, qB;
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mbedtls_mpi dA, dB, zA, zB, check;
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mbedtls_test_rnd_buf_info rnd_info_A, rnd_info_B;
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mbedtls_test_rnd_pseudo_info rnd_info;
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mbedtls_ecp_group_init(&grp);
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mbedtls_ecp_point_init(&qA); mbedtls_ecp_point_init(&qB);
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mbedtls_mpi_init(&dA); mbedtls_mpi_init(&dB);
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mbedtls_mpi_init(&zA); mbedtls_mpi_init(&zB); mbedtls_mpi_init(&check);
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memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
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TEST_ASSERT(mbedtls_ecp_group_load(&grp, id) == 0);
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rnd_info_A.buf = rnd_buf_A->x;
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rnd_info_A.length = rnd_buf_A->len;
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rnd_info_A.fallback_f_rng = mbedtls_test_rnd_std_rand;
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rnd_info_A.fallback_p_rng = NULL;
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/* Fix rnd_buf_A->x by shifting it left if necessary */
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if (grp.nbits % 8 != 0) {
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unsigned char shift = 8 - (grp.nbits % 8);
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size_t i;
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for (i = 0; i < rnd_info_A.length - 1; i++) {
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rnd_buf_A->x[i] = rnd_buf_A->x[i] << shift
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| rnd_buf_A->x[i+1] >> (8 - shift);
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}
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rnd_buf_A->x[rnd_info_A.length-1] <<= shift;
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}
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rnd_info_B.buf = rnd_buf_B->x;
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rnd_info_B.length = rnd_buf_B->len;
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rnd_info_B.fallback_f_rng = mbedtls_test_rnd_std_rand;
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rnd_info_B.fallback_p_rng = NULL;
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/* Fix rnd_buf_B->x by shifting it left if necessary */
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if (grp.nbits % 8 != 0) {
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unsigned char shift = 8 - (grp.nbits % 8);
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size_t i;
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for (i = 0; i < rnd_info_B.length - 1; i++) {
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rnd_buf_B->x[i] = rnd_buf_B->x[i] << shift
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| rnd_buf_B->x[i+1] >> (8 - shift);
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}
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rnd_buf_B->x[rnd_info_B.length-1] <<= shift;
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}
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TEST_ASSERT(mbedtls_ecdh_gen_public(&grp, &dA, &qA,
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mbedtls_test_rnd_buffer_rand,
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&rnd_info_A) == 0);
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TEST_ASSERT(!mbedtls_ecp_is_zero(&qA));
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TEST_ASSERT(mbedtls_test_read_mpi(&check, xA_str) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&qA.X, &check) == 0);
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TEST_ASSERT(mbedtls_test_read_mpi(&check, yA_str) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&qA.Y, &check) == 0);
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TEST_ASSERT(mbedtls_ecdh_gen_public(&grp, &dB, &qB,
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mbedtls_test_rnd_buffer_rand,
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&rnd_info_B) == 0);
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TEST_ASSERT(!mbedtls_ecp_is_zero(&qB));
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TEST_ASSERT(mbedtls_test_read_mpi(&check, xB_str) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&qB.X, &check) == 0);
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TEST_ASSERT(mbedtls_test_read_mpi(&check, yB_str) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&qB.Y, &check) == 0);
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TEST_ASSERT(mbedtls_test_read_mpi(&check, z_str) == 0);
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TEST_ASSERT(mbedtls_ecdh_compute_shared(&grp, &zA, &qB, &dA,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&zA, &check) == 0);
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TEST_ASSERT(mbedtls_ecdh_compute_shared(&grp, &zB, &qA, &dB,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_mpi_cmp_mpi(&zB, &check) == 0);
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exit:
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mbedtls_ecp_group_free(&grp);
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mbedtls_ecp_point_free(&qA); mbedtls_ecp_point_free(&qB);
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mbedtls_mpi_free(&dA); mbedtls_mpi_free(&dB);
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mbedtls_mpi_free(&zA); mbedtls_mpi_free(&zB); mbedtls_mpi_free(&check);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdh_exchange(int id)
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{
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mbedtls_ecdh_context srv, cli;
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unsigned char buf[1000];
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const unsigned char *vbuf;
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size_t len;
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mbedtls_test_rnd_pseudo_info rnd_info;
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unsigned char res_buf[1000];
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size_t res_len;
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mbedtls_ecdh_init(&srv);
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mbedtls_ecdh_init(&cli);
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memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
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TEST_ASSERT(mbedtls_ecdh_setup(&srv, id) == 0);
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memset(buf, 0x00, sizeof(buf)); vbuf = buf;
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TEST_ASSERT(mbedtls_ecdh_make_params(&srv, &len, buf, 1000,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_read_params(&cli, &vbuf, buf + len) == 0);
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memset(buf, 0x00, sizeof(buf));
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TEST_ASSERT(mbedtls_ecdh_make_public(&cli, &len, buf, 1000,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_read_public(&srv, buf, len) == 0);
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TEST_ASSERT(mbedtls_ecdh_calc_secret(&srv, &len, buf, 1000,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(mbedtls_ecdh_calc_secret(&cli, &res_len, res_buf, 1000,
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info) == 0);
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TEST_ASSERT(len == res_len);
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TEST_ASSERT(memcmp(buf, res_buf, len) == 0);
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exit:
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mbedtls_ecdh_free(&srv);
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mbedtls_ecdh_free(&cli);
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */
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void ecdh_restart(int id, data_t *dA, data_t *dB, data_t *z,
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int enable, int max_ops, int min_restart, int max_restart)
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{
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int ret;
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mbedtls_ecdh_context srv, cli;
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unsigned char buf[1000];
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const unsigned char *vbuf;
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size_t len;
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mbedtls_test_rnd_buf_info rnd_info_A, rnd_info_B;
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mbedtls_test_rnd_pseudo_info rnd_info;
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int cnt_restart;
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mbedtls_ecp_group grp;
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mbedtls_ecp_group_init(&grp);
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mbedtls_ecdh_init(&srv);
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mbedtls_ecdh_init(&cli);
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memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
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rnd_info_A.fallback_f_rng = mbedtls_test_rnd_std_rand;
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rnd_info_A.fallback_p_rng = NULL;
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rnd_info_A.buf = dA->x;
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rnd_info_A.length = dA->len;
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rnd_info_B.fallback_f_rng = mbedtls_test_rnd_std_rand;
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rnd_info_B.fallback_p_rng = NULL;
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rnd_info_B.buf = dB->x;
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rnd_info_B.length = dB->len;
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/* The ECDH context is not guaranteed to have an mbedtls_ecp_group structure
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* in every configuration, therefore we load it separately. */
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TEST_ASSERT(mbedtls_ecp_group_load(&grp, id) == 0);
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/* Otherwise we would have to fix the random buffer,
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* as in ecdh_primitive_testvec. */
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TEST_ASSERT(grp.nbits % 8 == 0);
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TEST_ASSERT(mbedtls_ecdh_setup(&srv, id) == 0);
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/* set up restart parameters */
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mbedtls_ecp_set_max_ops(max_ops);
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if (enable) {
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mbedtls_ecdh_enable_restart(&srv);
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mbedtls_ecdh_enable_restart(&cli);
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}
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/* server writes its parameters */
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memset(buf, 0x00, sizeof(buf));
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len = 0;
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cnt_restart = 0;
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do {
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ret = mbedtls_ecdh_make_params(&srv, &len, buf, sizeof(buf),
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mbedtls_test_rnd_buffer_rand,
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&rnd_info_A);
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} while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);
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TEST_ASSERT(ret == 0);
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TEST_ASSERT(cnt_restart >= min_restart);
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TEST_ASSERT(cnt_restart <= max_restart);
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/* client read server params */
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vbuf = buf;
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TEST_ASSERT(mbedtls_ecdh_read_params(&cli, &vbuf, buf + len) == 0);
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/* client writes its key share */
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memset(buf, 0x00, sizeof(buf));
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len = 0;
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cnt_restart = 0;
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do {
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ret = mbedtls_ecdh_make_public(&cli, &len, buf, sizeof(buf),
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mbedtls_test_rnd_buffer_rand,
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&rnd_info_B);
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} while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);
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TEST_ASSERT(ret == 0);
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TEST_ASSERT(cnt_restart >= min_restart);
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TEST_ASSERT(cnt_restart <= max_restart);
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/* server reads client key share */
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TEST_ASSERT(mbedtls_ecdh_read_public(&srv, buf, len) == 0);
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/* server computes shared secret */
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memset(buf, 0, sizeof(buf));
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len = 0;
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cnt_restart = 0;
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do {
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ret = mbedtls_ecdh_calc_secret(&srv, &len, buf, sizeof(buf),
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info);
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} while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);
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TEST_ASSERT(ret == 0);
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TEST_ASSERT(cnt_restart >= min_restart);
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TEST_ASSERT(cnt_restart <= max_restart);
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TEST_ASSERT(len == z->len);
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TEST_ASSERT(memcmp(buf, z->x, len) == 0);
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/* client computes shared secret */
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memset(buf, 0, sizeof(buf));
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len = 0;
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cnt_restart = 0;
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do {
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ret = mbedtls_ecdh_calc_secret(&cli, &len, buf, sizeof(buf),
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&mbedtls_test_rnd_pseudo_rand,
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&rnd_info);
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} while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);
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TEST_ASSERT(ret == 0);
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TEST_ASSERT(cnt_restart >= min_restart);
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TEST_ASSERT(cnt_restart <= max_restart);
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TEST_ASSERT(len == z->len);
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TEST_ASSERT(memcmp(buf, z->x, len) == 0);
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exit:
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mbedtls_ecp_group_free(&grp);
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mbedtls_ecdh_free(&srv);
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mbedtls_ecdh_free(&cli);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdh_exchange_calc_secret(int grp_id,
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data_t *our_private_key,
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data_t *their_point,
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int ours_first,
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data_t *expected)
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{
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mbedtls_test_rnd_pseudo_info rnd_info;
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mbedtls_ecp_keypair our_key;
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mbedtls_ecp_keypair their_key;
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mbedtls_ecdh_context ecdh;
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unsigned char shared_secret[MBEDTLS_ECP_MAX_BYTES];
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size_t shared_secret_length = 0;
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memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
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mbedtls_ecdh_init(&ecdh);
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mbedtls_ecp_keypair_init(&our_key);
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mbedtls_ecp_keypair_init(&their_key);
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if (!load_private_key(grp_id, our_private_key, &our_key, &rnd_info)) {
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goto exit;
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}
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if (!load_public_key(grp_id, their_point, &their_key)) {
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goto exit;
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}
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/* Import the keys to the ECDH calculation. */
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if (ours_first) {
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TEST_ASSERT(mbedtls_ecdh_get_params(
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&ecdh, &our_key, MBEDTLS_ECDH_OURS) == 0);
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TEST_ASSERT(mbedtls_ecdh_get_params(
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&ecdh, &their_key, MBEDTLS_ECDH_THEIRS) == 0);
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} else {
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TEST_ASSERT(mbedtls_ecdh_get_params(
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&ecdh, &their_key, MBEDTLS_ECDH_THEIRS) == 0);
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TEST_ASSERT(mbedtls_ecdh_get_params(
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&ecdh, &our_key, MBEDTLS_ECDH_OURS) == 0);
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}
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/* Perform the ECDH calculation. */
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TEST_ASSERT(mbedtls_ecdh_calc_secret(
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&ecdh,
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&shared_secret_length,
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shared_secret, sizeof(shared_secret),
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&mbedtls_test_rnd_pseudo_rand, &rnd_info) == 0);
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TEST_ASSERT(shared_secret_length == expected->len);
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TEST_ASSERT(memcmp(expected->x, shared_secret,
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shared_secret_length) == 0);
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exit:
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mbedtls_ecdh_free(&ecdh);
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mbedtls_ecp_keypair_free(&our_key);
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mbedtls_ecp_keypair_free(&their_key);
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}
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/* END_CASE */
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/* BEGIN_CASE */
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void ecdh_exchange_get_params_fail(int our_grp_id,
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data_t *our_private_key,
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int their_grp_id,
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data_t *their_point,
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int ours_first,
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int expected_ret)
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{
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mbedtls_test_rnd_pseudo_info rnd_info;
|
|
mbedtls_ecp_keypair our_key;
|
|
mbedtls_ecp_keypair their_key;
|
|
mbedtls_ecdh_context ecdh;
|
|
|
|
memset(&rnd_info, 0x00, sizeof(mbedtls_test_rnd_pseudo_info));
|
|
mbedtls_ecdh_init(&ecdh);
|
|
mbedtls_ecp_keypair_init(&our_key);
|
|
mbedtls_ecp_keypair_init(&their_key);
|
|
|
|
if (!load_private_key(our_grp_id, our_private_key, &our_key, &rnd_info)) {
|
|
goto exit;
|
|
}
|
|
if (!load_public_key(their_grp_id, their_point, &their_key)) {
|
|
goto exit;
|
|
}
|
|
|
|
if (ours_first) {
|
|
TEST_ASSERT(mbedtls_ecdh_get_params(
|
|
&ecdh, &our_key, MBEDTLS_ECDH_OURS) == 0);
|
|
TEST_ASSERT(mbedtls_ecdh_get_params(
|
|
&ecdh, &their_key, MBEDTLS_ECDH_THEIRS) ==
|
|
expected_ret);
|
|
} else {
|
|
TEST_ASSERT(mbedtls_ecdh_get_params(
|
|
&ecdh, &their_key, MBEDTLS_ECDH_THEIRS) == 0);
|
|
TEST_ASSERT(mbedtls_ecdh_get_params(
|
|
&ecdh, &our_key, MBEDTLS_ECDH_OURS) ==
|
|
expected_ret);
|
|
}
|
|
|
|
exit:
|
|
mbedtls_ecdh_free(&ecdh);
|
|
mbedtls_ecp_keypair_free(&our_key);
|
|
mbedtls_ecp_keypair_free(&their_key);
|
|
}
|
|
/* END_CASE */
|