mbedtls/tests/suites/test_suite_dhm.function

BEGIN_HEADER
#include <polarssl/dhm.h>

static int myrand( void *r )
{
    if ( r != NULL )
        r = NULL;

    return( rand() );
}

END_HEADER

BEGIN_CASE
dhm_do_dhm:x_size:radix_P:input_P:radix_G:input_G
{
    dhm_context ctx_srv;
    dhm_context ctx_cli;
    unsigned char ske[1000];
    unsigned char *p = ske;
    unsigned char pub_cli[1000];
    unsigned char sec_srv[1000];
    unsigned char sec_cli[1000];
    int ske_len = 0;
    int pub_cli_len = 0;
    int sec_srv_len = 1000;
    int sec_cli_len = 1000;
    int x_size;

    memset( &ctx_srv, 0x00, sizeof( dhm_context ) );
    memset( &ctx_cli, 0x00, sizeof( dhm_context ) );
    memset( ske, 0x00, 1000 );
    memset( pub_cli, 0x00, 1000 );
    memset( sec_srv, 0x00, 1000 );
    memset( sec_cli, 0x00, 1000 );

    TEST_ASSERT( mpi_read_string( &ctx_srv.P, {radix_P}, {input_P} ) == 0 );
    TEST_ASSERT( mpi_read_string( &ctx_srv.G, {radix_G}, {input_G} ) == 0 );
    x_size = mpi_size( &ctx_srv.P );

    TEST_ASSERT( dhm_make_params( &ctx_srv, x_size, ske, &ske_len, &myrand, NULL ) == 0 );
    ske[ske_len++] = 0;
    ske[ske_len++] = 0;
    TEST_ASSERT( dhm_read_params( &ctx_cli, &p, ske + ske_len ) == 0 );

    pub_cli_len = x_size;
    TEST_ASSERT( dhm_make_public( &ctx_cli, x_size, pub_cli, pub_cli_len, &myrand, NULL ) == 0 );

    TEST_ASSERT( dhm_read_public( &ctx_srv, pub_cli, pub_cli_len ) == 0 );

    TEST_ASSERT( dhm_calc_secret( &ctx_srv, sec_srv, &sec_srv_len ) == 0 );
    TEST_ASSERT( dhm_calc_secret( &ctx_cli, sec_cli, &sec_cli_len ) == 0 );

    TEST_ASSERT( sec_srv_len == sec_cli_len );
    TEST_ASSERT( sec_srv_len != 0 );
    TEST_ASSERT( memcmp( sec_srv, sec_cli, sec_srv_len ) == 0 );
}
END_CASE