2 #include "mbedtls/ecdh.h"
6 * depends_on:MBEDTLS_ECDH_C
11 void ecdh_primitive_random( int id )
13 mbedtls_ecp_group grp;
14 mbedtls_ecp_point qA, qB;
15 mbedtls_mpi dA, dB, zA, zB;
16 rnd_pseudo_info rnd_info;
18 mbedtls_ecp_group_init( &grp );
19 mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB );
20 mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB );
21 mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB );
22 memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
24 TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
26 TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA, &rnd_pseudo_rand, &rnd_info )
28 TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB, &rnd_pseudo_rand, &rnd_info )
30 TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA,
31 &rnd_pseudo_rand, &rnd_info ) == 0 );
32 TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB,
35 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &zB ) == 0 );
38 mbedtls_ecp_group_free( &grp );
39 mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB );
40 mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB );
41 mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB );
46 void ecdh_primitive_testvec( int id, char *dA_str, char *xA_str, char *yA_str,
47 char *dB_str, char *xB_str, char *yB_str,
50 mbedtls_ecp_group grp;
51 mbedtls_ecp_point qA, qB;
52 mbedtls_mpi dA, dB, zA, zB, check;
53 unsigned char rnd_buf_A[MBEDTLS_ECP_MAX_BYTES];
54 unsigned char rnd_buf_B[MBEDTLS_ECP_MAX_BYTES];
55 rnd_buf_info rnd_info_A, rnd_info_B;
57 mbedtls_ecp_group_init( &grp );
58 mbedtls_ecp_point_init( &qA ); mbedtls_ecp_point_init( &qB );
59 mbedtls_mpi_init( &dA ); mbedtls_mpi_init( &dB );
60 mbedtls_mpi_init( &zA ); mbedtls_mpi_init( &zB ); mbedtls_mpi_init( &check );
62 TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
64 rnd_info_A.buf = rnd_buf_A;
65 rnd_info_A.length = unhexify( rnd_buf_A, dA_str );
67 /* Fix rnd_buf_A by shifting it left if necessary */
68 if( grp.nbits % 8 != 0 )
70 unsigned char shift = 8 - ( grp.nbits % 8 );
73 for( i = 0; i < rnd_info_A.length - 1; i++ )
74 rnd_buf_A[i] = rnd_buf_A[i] << shift
75 | rnd_buf_A[i+1] >> ( 8 - shift );
77 rnd_buf_A[rnd_info_A.length-1] <<= shift;
80 rnd_info_B.buf = rnd_buf_B;
81 rnd_info_B.length = unhexify( rnd_buf_B, dB_str );
83 /* Fix rnd_buf_B by shifting it left if necessary */
84 if( grp.nbits % 8 != 0 )
86 unsigned char shift = 8 - ( grp.nbits % 8 );
89 for( i = 0; i < rnd_info_B.length - 1; i++ )
90 rnd_buf_B[i] = rnd_buf_B[i] << shift
91 | rnd_buf_B[i+1] >> ( 8 - shift );
93 rnd_buf_B[rnd_info_B.length-1] <<= shift;
96 TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dA, &qA,
97 rnd_buffer_rand, &rnd_info_A ) == 0 );
98 TEST_ASSERT( ! mbedtls_ecp_is_zero( &qA ) );
99 TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xA_str ) == 0 );
100 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.X, &check ) == 0 );
101 TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yA_str ) == 0 );
102 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qA.Y, &check ) == 0 );
104 TEST_ASSERT( mbedtls_ecdh_gen_public( &grp, &dB, &qB,
105 rnd_buffer_rand, &rnd_info_B ) == 0 );
106 TEST_ASSERT( ! mbedtls_ecp_is_zero( &qB ) );
107 TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, xB_str ) == 0 );
108 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.X, &check ) == 0 );
109 TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, yB_str ) == 0 );
110 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &qB.Y, &check ) == 0 );
112 TEST_ASSERT( mbedtls_mpi_read_string( &check, 16, z_str ) == 0 );
113 TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zA, &qB, &dA, NULL, NULL ) == 0 );
114 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zA, &check ) == 0 );
115 TEST_ASSERT( mbedtls_ecdh_compute_shared( &grp, &zB, &qA, &dB, NULL, NULL ) == 0 );
116 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &zB, &check ) == 0 );
119 mbedtls_ecp_group_free( &grp );
120 mbedtls_ecp_point_free( &qA ); mbedtls_ecp_point_free( &qB );
121 mbedtls_mpi_free( &dA ); mbedtls_mpi_free( &dB );
122 mbedtls_mpi_free( &zA ); mbedtls_mpi_free( &zB ); mbedtls_mpi_free( &check );
127 void ecdh_exchange( int id )
129 mbedtls_ecdh_context srv, cli;
130 unsigned char buf[1000];
131 const unsigned char *vbuf;
133 rnd_pseudo_info rnd_info;
135 mbedtls_ecdh_init( &srv );
136 mbedtls_ecdh_init( &cli );
137 memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
139 TEST_ASSERT( mbedtls_ecp_group_load( &srv.grp, id ) == 0 );
141 memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
142 TEST_ASSERT( mbedtls_ecdh_make_params( &srv, &len, buf, 1000,
143 &rnd_pseudo_rand, &rnd_info ) == 0 );
144 TEST_ASSERT( mbedtls_ecdh_read_params( &cli, &vbuf, buf + len ) == 0 );
146 memset( buf, 0x00, sizeof( buf ) );
147 TEST_ASSERT( mbedtls_ecdh_make_public( &cli, &len, buf, 1000,
148 &rnd_pseudo_rand, &rnd_info ) == 0 );
149 TEST_ASSERT( mbedtls_ecdh_read_public( &srv, buf, len ) == 0 );
151 TEST_ASSERT( mbedtls_ecdh_calc_secret( &srv, &len, buf, 1000,
152 &rnd_pseudo_rand, &rnd_info ) == 0 );
153 TEST_ASSERT( mbedtls_ecdh_calc_secret( &cli, &len, buf, 1000, NULL, NULL ) == 0 );
154 TEST_ASSERT( mbedtls_mpi_cmp_mpi( &srv.z, &cli.z ) == 0 );
157 mbedtls_ecdh_free( &srv );
158 mbedtls_ecdh_free( &cli );