diff options
Diffstat (limited to 'tests/suites/test_suite_ecdsa.function')
| -rw-r--r-- | tests/suites/test_suite_ecdsa.function | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/tests/suites/test_suite_ecdsa.function b/tests/suites/test_suite_ecdsa.function new file mode 100644 index 000000000..0e2ac92c7 --- /dev/null +++ b/tests/suites/test_suite_ecdsa.function @@ -0,0 +1,505 @@ +/* BEGIN_HEADER */ +#include "mbedtls/ecdsa.h" +#include "hash_info.h" +#include "mbedtls/legacy_or_psa.h" +#if ( defined(MBEDTLS_ECDSA_DETERMINISTIC) && defined(MBEDTLS_SHA256_C) ) || \ + ( !defined(MBEDTLS_ECDSA_DETERMINISTIC) && defined(MBEDTLS_HAS_ALG_SHA_256_VIA_LOWLEVEL_OR_PSA) ) +#define MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC +#endif +/* END_HEADER */ + +/* BEGIN_DEPENDENCIES + * depends_on:MBEDTLS_ECDSA_C + * END_DEPENDENCIES + */ + +/* BEGIN_CASE */ +void ecdsa_prim_zero( int id ) +{ + mbedtls_ecp_group grp; + mbedtls_ecp_point Q; + mbedtls_mpi d, r, s; + mbedtls_test_rnd_pseudo_info rnd_info; + unsigned char buf[MBEDTLS_HASH_MAX_SIZE]; + + mbedtls_ecp_group_init( &grp ); + mbedtls_ecp_point_init( &Q ); + mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); + memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); + memset( buf, 0, sizeof( buf ) ); + + TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); + TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q, + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + + TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ), + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 ); + +exit: + mbedtls_ecp_group_free( &grp ); + mbedtls_ecp_point_free( &Q ); + mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); +} +/* END_CASE */ + +/* BEGIN_CASE */ +void ecdsa_prim_random( int id ) +{ + mbedtls_ecp_group grp; + mbedtls_ecp_point Q; + mbedtls_mpi d, r, s; + mbedtls_test_rnd_pseudo_info rnd_info; + unsigned char buf[MBEDTLS_HASH_MAX_SIZE]; + + mbedtls_ecp_group_init( &grp ); + mbedtls_ecp_point_init( &Q ); + mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); + memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); + memset( buf, 0, sizeof( buf ) ); + + /* prepare material for signature */ + TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info, + buf, sizeof( buf ) ) == 0 ); + TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); + TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q, + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + + TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ), + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 ); + +exit: + mbedtls_ecp_group_free( &grp ); + mbedtls_ecp_point_free( &Q ); + mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); +} +/* END_CASE */ + +/* BEGIN_CASE */ +void ecdsa_prim_test_vectors( int id, char * d_str, char * xQ_str, + char * yQ_str, data_t * rnd_buf, + data_t * hash, char * r_str, char * s_str, + int result ) +{ + mbedtls_ecp_group grp; + mbedtls_ecp_point Q; + mbedtls_mpi d, r, s, r_check, s_check, zero; + mbedtls_test_rnd_buf_info rnd_info; + + mbedtls_ecp_group_init( &grp ); + mbedtls_ecp_point_init( &Q ); + mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); + mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check ); + mbedtls_mpi_init( &zero ); + + TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); + TEST_ASSERT( mbedtls_ecp_point_read_string( &Q, 16, xQ_str, yQ_str ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &d, d_str ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &r_check, r_str ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &s_check, s_str ) == 0 ); + rnd_info.fallback_f_rng = mbedtls_test_rnd_std_rand; + rnd_info.fallback_p_rng = NULL; + rnd_info.buf = rnd_buf->x; + rnd_info.length = rnd_buf->len; + + /* Fix rnd_buf->x by shifting it left if necessary */ + if( grp.nbits % 8 != 0 ) + { + unsigned char shift = 8 - ( grp.nbits % 8 ); + size_t i; + + for( i = 0; i < rnd_info.length - 1; i++ ) + rnd_buf->x[i] = rnd_buf->x[i] << shift | rnd_buf->x[i+1] >> ( 8 - shift ); + + rnd_buf->x[rnd_info.length-1] <<= shift; + } + + TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, hash->x, hash->len, + mbedtls_test_rnd_buffer_rand, &rnd_info ) == result ); + + if ( result == 0) + { + /* Check we generated the expected values */ + TEST_EQUAL( mbedtls_mpi_cmp_mpi( &r, &r_check ), 0 ); + TEST_EQUAL( mbedtls_mpi_cmp_mpi( &s, &s_check ), 0 ); + + /* Valid signature */ + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, + &Q, &r_check, &s_check ), 0 ); + + /* Invalid signature: wrong public key (G instead of Q) */ + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, + &grp.G, &r_check, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + + /* Invalid signatures: r or s or both one off */ + TEST_EQUAL( mbedtls_mpi_sub_int( &r, &r_check, 1 ), 0 ); + TEST_EQUAL( mbedtls_mpi_add_int( &s, &s_check, 1 ), 0 ); + + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + + /* Invalid signatures: r, s or both (CVE-2022-21449) are zero */ + TEST_EQUAL( mbedtls_mpi_lset( &zero, 0 ), 0 ); + + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &zero, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r_check, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &zero, &zero ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + + /* Invalid signatures: r, s or both are == N */ + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &grp.N, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r_check, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &grp.N, &grp.N ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + + /* Invalid signatures: r, s or both are negative */ + TEST_EQUAL( mbedtls_mpi_sub_mpi( &r, &r_check, &grp.N ), 0 ); + TEST_EQUAL( mbedtls_mpi_sub_mpi( &s, &s_check, &grp.N ), 0 ); + + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + + /* Invalid signatures: r or s or both are > N */ + TEST_EQUAL( mbedtls_mpi_add_mpi( &r, &r_check, &grp.N ), 0 ); + TEST_EQUAL( mbedtls_mpi_add_mpi( &s, &s_check, &grp.N ), 0 ); + + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s_check ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r_check, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + TEST_EQUAL( mbedtls_ecdsa_verify( &grp, hash->x, hash->len, &Q, + &r, &s ), MBEDTLS_ERR_ECP_VERIFY_FAILED ); + } + +exit: + mbedtls_ecp_group_free( &grp ); + mbedtls_ecp_point_free( &Q ); + mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); + mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check ); + mbedtls_mpi_free( &zero ); +} +/* END_CASE */ + +/* BEGIN_CASE depends_on:MBEDTLS_ECDSA_DETERMINISTIC */ +void ecdsa_det_test_vectors( int id, char * d_str, int md_alg, data_t * hash, + char * r_str, char * s_str ) +{ + mbedtls_ecp_group grp; + mbedtls_mpi d, r, s, r_check, s_check; + + mbedtls_ecp_group_init( &grp ); + mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); + mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check ); + + TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &d, d_str ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &r_check, r_str ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &s_check, s_str ) == 0 ); + + TEST_ASSERT( + mbedtls_ecdsa_sign_det_ext( &grp, &r, &s, &d, + hash->x, hash->len, md_alg, + mbedtls_test_rnd_std_rand, + NULL ) + == 0 ); + + TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 ); + TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 ); + +exit: + mbedtls_ecp_group_free( &grp ); + mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); + mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check ); +} +/* END_CASE */ + +/* BEGIN_CASE depends_on:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC */ +void ecdsa_write_read_zero( int id ) +{ + mbedtls_ecdsa_context ctx; + mbedtls_test_rnd_pseudo_info rnd_info; + unsigned char hash[32]; + unsigned char sig[200]; + size_t sig_len, i; + + mbedtls_ecdsa_init( &ctx ); + memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); + memset( hash, 0, sizeof( hash ) ); + memset( sig, 0x2a, sizeof( sig ) ); + + /* generate signing key */ + TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id, + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + + /* generate and write signature, then read and verify it */ + TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256, + hash, sizeof( hash ), + sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == 0 ); + + /* check we didn't write past the announced length */ + for( i = sig_len; i < sizeof( sig ); i++ ) + TEST_ASSERT( sig[i] == 0x2a ); + + /* try verification with invalid length */ + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len - 1 ) != 0 ); + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len + 1 ) != 0 ); + + /* try invalid sequence tag */ + sig[0]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) != 0 ); + sig[0]--; + + /* try modifying r */ + sig[10]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig[10]--; + + /* try modifying s */ + sig[sig_len - 1]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig[sig_len - 1]--; + +exit: + mbedtls_ecdsa_free( &ctx ); +} +/* END_CASE */ + +/* BEGIN_CASE depends_on:MBEDTLS_HAS_ALG_SHA_256_VIA_MD_IF_DETERMINISTIC */ +void ecdsa_write_read_random( int id ) +{ + mbedtls_ecdsa_context ctx; + mbedtls_test_rnd_pseudo_info rnd_info; + unsigned char hash[32]; + unsigned char sig[200]; + size_t sig_len, i; + + mbedtls_ecdsa_init( &ctx ); + memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) ); + memset( hash, 0, sizeof( hash ) ); + memset( sig, 0x2a, sizeof( sig ) ); + + /* prepare material for signature */ + TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info, + hash, sizeof( hash ) ) == 0 ); + + /* generate signing key */ + TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id, + &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + + /* generate and write signature, then read and verify it */ + TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256, + hash, sizeof( hash ), + sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand, + &rnd_info ) == 0 ); + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == 0 ); + + /* check we didn't write past the announced length */ + for( i = sig_len; i < sizeof( sig ); i++ ) + TEST_ASSERT( sig[i] == 0x2a ); + + /* try verification with invalid length */ + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len - 1 ) != 0 ); + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len + 1 ) != 0 ); + + /* try invalid sequence tag */ + sig[0]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) != 0 ); + sig[0]--; + + /* try modifying r */ + sig[10]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig[10]--; + + /* try modifying s */ + sig[sig_len - 1]++; + TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), + sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig[sig_len - 1]--; + +exit: + mbedtls_ecdsa_free( &ctx ); +} +/* END_CASE */ + +/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE */ +void ecdsa_read_restart( int id, data_t *pk, data_t *hash, data_t *sig, + int max_ops, int min_restart, int max_restart ) +{ + mbedtls_ecdsa_context ctx; + mbedtls_ecdsa_restart_ctx rs_ctx; + int ret, cnt_restart; + + mbedtls_ecdsa_init( &ctx ); + mbedtls_ecdsa_restart_init( &rs_ctx ); + + TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 ); + TEST_ASSERT( mbedtls_ecp_point_read_binary( &ctx.grp, &ctx.Q, + pk->x, pk->len ) == 0 ); + + mbedtls_ecp_set_max_ops( max_ops ); + + cnt_restart = 0; + do { + ret = mbedtls_ecdsa_read_signature_restartable( &ctx, + hash->x, hash->len, sig->x, sig->len, &rs_ctx ); + } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart ); + + TEST_ASSERT( ret == 0 ); + TEST_ASSERT( cnt_restart >= min_restart ); + TEST_ASSERT( cnt_restart <= max_restart ); + + /* try modifying r */ + + TEST_ASSERT( sig->len > 10 ); + sig->x[10]++; + do { + ret = mbedtls_ecdsa_read_signature_restartable( &ctx, + hash->x, hash->len, sig->x, sig->len, &rs_ctx ); + } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ); + TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig->x[10]--; + + /* try modifying s */ + sig->x[sig->len - 1]++; + do { + ret = mbedtls_ecdsa_read_signature_restartable( &ctx, + hash->x, hash->len, sig->x, sig->len, &rs_ctx ); + } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ); + TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED ); + sig->x[sig->len - 1]--; + + /* Do we leak memory when aborting an operation? + * This test only makes sense when we actually restart */ + if( min_restart > 0 ) + { + ret = mbedtls_ecdsa_read_signature_restartable( &ctx, + hash->x, hash->len, sig->x, sig->len, &rs_ctx ); + TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ); + } + +exit: + mbedtls_ecdsa_free( &ctx ); + mbedtls_ecdsa_restart_free( &rs_ctx ); +} +/* END_CASE */ + +/* BEGIN_CASE depends_on:MBEDTLS_ECP_RESTARTABLE:MBEDTLS_ECDSA_DETERMINISTIC */ +void ecdsa_write_restart( int id, char *d_str, int md_alg, + data_t *hash, data_t *sig_check, + int max_ops, int min_restart, int max_restart ) +{ + int ret, cnt_restart; + mbedtls_ecdsa_restart_ctx rs_ctx; + mbedtls_ecdsa_context ctx; + unsigned char sig[MBEDTLS_ECDSA_MAX_LEN]; + size_t slen; + + mbedtls_ecdsa_restart_init( &rs_ctx ); + mbedtls_ecdsa_init( &ctx ); + memset( sig, 0, sizeof( sig ) ); + + TEST_ASSERT( mbedtls_ecp_group_load( &ctx.grp, id ) == 0 ); + TEST_ASSERT( mbedtls_test_read_mpi( &ctx.d, d_str ) == 0 ); + + mbedtls_ecp_set_max_ops( max_ops ); + + slen = sizeof( sig ); + cnt_restart = 0; + do { + ret = mbedtls_ecdsa_write_signature_restartable( &ctx, + md_alg, hash->x, hash->len, sig, sizeof( sig ), &slen, + mbedtls_test_rnd_std_rand, NULL, &rs_ctx ); + } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart ); + + TEST_ASSERT( ret == 0 ); + TEST_ASSERT( slen == sig_check->len ); + TEST_ASSERT( memcmp( sig, sig_check->x, slen ) == 0 ); + + TEST_ASSERT( cnt_restart >= min_restart ); + TEST_ASSERT( cnt_restart <= max_restart ); + + /* Do we leak memory when aborting an operation? + * This test only makes sense when we actually restart */ + if( min_restart > 0 ) + { + ret = mbedtls_ecdsa_write_signature_restartable( &ctx, + md_alg, hash->x, hash->len, sig, sizeof( sig ), &slen, + mbedtls_test_rnd_std_rand, NULL, &rs_ctx ); + TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ); + } + +exit: + mbedtls_ecdsa_restart_free( &rs_ctx ); + mbedtls_ecdsa_free( &ctx ); +} +/* END_CASE */ + +/* BEGIN_CASE */ +void ecdsa_verify( int grp_id, char * x, char * y, char * r, char * s, data_t * content, int expected ) +{ + mbedtls_ecdsa_context ctx; + mbedtls_mpi sig_r, sig_s; + + mbedtls_ecdsa_init( &ctx ); + mbedtls_mpi_init( &sig_r ); + mbedtls_mpi_init( &sig_s ); + + /* Prepare ECP group context */ + TEST_EQUAL( mbedtls_ecp_group_load( &ctx.grp, grp_id ), 0 ); + + /* Prepare public key */ + TEST_EQUAL( mbedtls_test_read_mpi( &ctx.Q.X, x ), 0 ); + TEST_EQUAL( mbedtls_test_read_mpi( &ctx.Q.Y, y ), 0 ); + TEST_EQUAL( mbedtls_mpi_lset( &ctx.Q.Z, 1 ), 0 ); + + /* Prepare signature R & S */ + TEST_EQUAL( mbedtls_test_read_mpi( &sig_r, r ), 0 ); + TEST_EQUAL( mbedtls_test_read_mpi( &sig_s, s ), 0 ); + + /* Test whether public key has expected validity */ + TEST_EQUAL( mbedtls_ecp_check_pubkey( &ctx.grp, &ctx.Q ), + expected == MBEDTLS_ERR_ECP_INVALID_KEY ? MBEDTLS_ERR_ECP_INVALID_KEY : 0 ); + + /* Verification */ + int result = mbedtls_ecdsa_verify( &ctx.grp, content->x, content->len, &ctx.Q, &sig_r, &sig_s ); + + TEST_EQUAL( result, expected ); +exit: + mbedtls_ecdsa_free( &ctx ); + mbedtls_mpi_free( &sig_r ); + mbedtls_mpi_free( &sig_s ); +} +/* END_CASE */ |