1/* BEGIN_HEADER */ 2#include "mbedtls/ecdsa.h" 3/* END_HEADER */ 4 5/* BEGIN_DEPENDENCIES 6 * depends_on:MBEDTLS_ECDSA_C 7 * END_DEPENDENCIES 8 */ 9 10/* BEGIN_CASE */ 11void ecdsa_prim_random( int id ) 12{ 13 mbedtls_ecp_group grp; 14 mbedtls_ecp_point Q; 15 mbedtls_mpi d, r, s; 16 rnd_pseudo_info rnd_info; 17 unsigned char buf[66]; 18 19 mbedtls_ecp_group_init( &grp ); 20 mbedtls_ecp_point_init( &Q ); 21 mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); 22 memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); 23 memset( buf, 0, sizeof( buf ) ); 24 25 /* prepare material for signature */ 26 TEST_ASSERT( rnd_pseudo_rand( &rnd_info, buf, sizeof( buf ) ) == 0 ); 27 TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); 28 TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q, &rnd_pseudo_rand, &rnd_info ) 29 == 0 ); 30 31 TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ), 32 &rnd_pseudo_rand, &rnd_info ) == 0 ); 33 TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 ); 34 35exit: 36 mbedtls_ecp_group_free( &grp ); 37 mbedtls_ecp_point_free( &Q ); 38 mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); 39} 40/* END_CASE */ 41 42/* BEGIN_CASE */ 43void ecdsa_prim_test_vectors( int id, char *d_str, char *xQ_str, char *yQ_str, 44 char *k_str, char *hash_str, char *r_str, 45 char *s_str ) 46{ 47 mbedtls_ecp_group grp; 48 mbedtls_ecp_point Q; 49 mbedtls_mpi d, r, s, r_check, s_check; 50 unsigned char hash[66], rnd_buf[66]; 51 size_t hlen; 52 rnd_buf_info rnd_info; 53 54 mbedtls_ecp_group_init( &grp ); 55 mbedtls_ecp_point_init( &Q ); 56 mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); 57 mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check ); 58 memset( hash, 0, sizeof( hash ) ); 59 memset( rnd_buf, 0, sizeof( rnd_buf ) ); 60 61 TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); 62 TEST_ASSERT( mbedtls_ecp_point_read_string( &Q, 16, xQ_str, yQ_str ) == 0 ); 63 TEST_ASSERT( mbedtls_mpi_read_string( &d, 16, d_str ) == 0 ); 64 TEST_ASSERT( mbedtls_mpi_read_string( &r_check, 16, r_str ) == 0 ); 65 TEST_ASSERT( mbedtls_mpi_read_string( &s_check, 16, s_str ) == 0 ); 66 hlen = unhexify(hash, hash_str); 67 rnd_info.buf = rnd_buf; 68 rnd_info.length = unhexify( rnd_buf, k_str ); 69 70 /* Fix rnd_buf by shifting it left if necessary */ 71 if( grp.nbits % 8 != 0 ) 72 { 73 unsigned char shift = 8 - ( grp.nbits % 8 ); 74 size_t i; 75 76 for( i = 0; i < rnd_info.length - 1; i++ ) 77 rnd_buf[i] = rnd_buf[i] << shift | rnd_buf[i+1] >> ( 8 - shift ); 78 79 rnd_buf[rnd_info.length-1] <<= shift; 80 } 81 82 TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, hash, hlen, 83 rnd_buffer_rand, &rnd_info ) == 0 ); 84 85 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 ); 86 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 ); 87 88 TEST_ASSERT( mbedtls_ecdsa_verify( &grp, hash, hlen, &Q, &r_check, &s_check ) == 0 ); 89 90exit: 91 mbedtls_ecp_group_free( &grp ); 92 mbedtls_ecp_point_free( &Q ); 93 mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); 94 mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check ); 95} 96/* END_CASE */ 97 98/* BEGIN_CASE depends_on:MBEDTLS_ECDSA_DETERMINISTIC */ 99void ecdsa_det_test_vectors( int id, char *d_str, int md_alg, 100 char *msg, char *r_str, char *s_str ) 101{ 102 mbedtls_ecp_group grp; 103 mbedtls_mpi d, r, s, r_check, s_check; 104 unsigned char hash[MBEDTLS_MD_MAX_SIZE]; 105 size_t hlen; 106 const mbedtls_md_info_t *md_info; 107 108 mbedtls_ecp_group_init( &grp ); 109 mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s ); 110 mbedtls_mpi_init( &r_check ); mbedtls_mpi_init( &s_check ); 111 memset( hash, 0, sizeof( hash ) ); 112 113 TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 ); 114 TEST_ASSERT( mbedtls_mpi_read_string( &d, 16, d_str ) == 0 ); 115 TEST_ASSERT( mbedtls_mpi_read_string( &r_check, 16, r_str ) == 0 ); 116 TEST_ASSERT( mbedtls_mpi_read_string( &s_check, 16, s_str ) == 0 ); 117 118 md_info = mbedtls_md_info_from_type( md_alg ); 119 TEST_ASSERT( md_info != NULL ); 120 hlen = mbedtls_md_get_size( md_info ); 121 mbedtls_md( md_info, (const unsigned char *) msg, strlen( msg ), hash ); 122 123 TEST_ASSERT( mbedtls_ecdsa_sign_det( &grp, &r, &s, &d, hash, hlen, md_alg ) == 0 ); 124 125 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &r, &r_check ) == 0 ); 126 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &s, &s_check ) == 0 ); 127 128exit: 129 mbedtls_ecp_group_free( &grp ); 130 mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s ); 131 mbedtls_mpi_free( &r_check ); mbedtls_mpi_free( &s_check ); 132} 133/* END_CASE */ 134 135/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */ 136void ecdsa_write_read_random( int id ) 137{ 138 mbedtls_ecdsa_context ctx; 139 rnd_pseudo_info rnd_info; 140 unsigned char hash[32]; 141 unsigned char sig[200]; 142 size_t sig_len, i; 143 144 mbedtls_ecdsa_init( &ctx ); 145 memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) ); 146 memset( hash, 0, sizeof( hash ) ); 147 memset( sig, 0x2a, sizeof( sig ) ); 148 149 /* prepare material for signature */ 150 TEST_ASSERT( rnd_pseudo_rand( &rnd_info, hash, sizeof( hash ) ) == 0 ); 151 152 /* generate signing key */ 153 TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id, &rnd_pseudo_rand, &rnd_info ) == 0 ); 154 155 /* generate and write signature, then read and verify it */ 156 TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256, 157 hash, sizeof( hash ), 158 sig, &sig_len, &rnd_pseudo_rand, &rnd_info ) == 0 ); 159 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 160 sig, sig_len ) == 0 ); 161 162 /* check we didn't write past the announced length */ 163 for( i = sig_len; i < sizeof( sig ); i++ ) 164 TEST_ASSERT( sig[i] == 0x2a ); 165 166 /* try verification with invalid length */ 167 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 168 sig, sig_len - 1 ) != 0 ); 169 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 170 sig, sig_len + 1 ) != 0 ); 171 172 /* try invalid sequence tag */ 173 sig[0]++; 174 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 175 sig, sig_len ) != 0 ); 176 sig[0]--; 177 178 /* try modifying r */ 179 sig[10]++; 180 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 181 sig, sig_len ) != 0 ); 182 sig[10]--; 183 184 /* try modifying s */ 185 sig[sig_len - 1]++; 186 TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ), 187 sig, sig_len ) != 0 ); 188 sig[sig_len - 1]--; 189 190exit: 191 mbedtls_ecdsa_free( &ctx ); 192} 193/* END_CASE */ 194 195