tests/suites/test_suite_gcm.function

BEGIN_HEADER
#include <polarssl/gcm.h>
END_HEADER

BEGIN_DEPENDENCIES
depends_on:POLARSSL_GCM_C
END_DEPENDENCIES

BEGIN_CASE
gcm_encrypt_and_tag:hex_key_string:hex_src_string:hex_iv_string:hex_add_string:hex_dst_string:tag_len:hex_tag_string:init_result
{
    unsigned char key_str[128];
    unsigned char src_str[128];
    unsigned char dst_str[257];
    unsigned char iv_str[128];
    unsigned char add_str[128];
    unsigned char tag_str[128];
    unsigned char output[128];
    unsigned char tag_output[16];
    gcm_context ctx;
    unsigned int key_len;
    size_t pt_len, iv_len, add_len, tag_len = {tag_len} / 8;

    memset(key_str, 0x00, 128);
    memset(src_str, 0x00, 128);
    memset(dst_str, 0x00, 256);
    memset(iv_str, 0x00, 128);
    memset(add_str, 0x00, 128);
    memset(tag_str, 0x00, 128);
    memset(output, 0x00, 128);
    memset(tag_output, 0x00, 16);

    key_len = unhexify( key_str, {hex_key_string} );
    pt_len = unhexify( src_str, {hex_src_string} );
    iv_len = unhexify( iv_str, {hex_iv_string} );
    add_len = unhexify( add_str, {hex_add_string} );

    TEST_ASSERT( gcm_init( &ctx, key_str, key_len * 8 ) == {init_result} );
    if( {init_result} == 0 )
    {
        TEST_ASSERT( gcm_crypt_and_tag( &ctx, GCM_ENCRYPT, pt_len, iv_str, iv_len, add_str, add_len, src_str, output, tag_len, tag_output ) == 0 );
        hexify( dst_str, output, pt_len );
        hexify( tag_str, tag_output, tag_len );

        TEST_ASSERT( strcmp( (char *) dst_str, {hex_dst_string} ) == 0 );
        TEST_ASSERT( strcmp( (char *) tag_str, {hex_tag_string} ) == 0 );
    }
}
END_CASE

BEGIN_CASE
gcm_decrypt_and_verify:hex_key_string:hex_src_string:hex_iv_string:hex_add_string:tag_len:hex_tag_string:pt_result:init_result
{
    unsigned char key_str[128];
    unsigned char src_str[128];
    unsigned char dst_str[257];
    unsigned char iv_str[128];
    unsigned char add_str[128];
    unsigned char tag_str[128];
    unsigned char output[128];
    gcm_context ctx;
    unsigned int key_len;
    size_t pt_len, iv_len, add_len, tag_len = {tag_len} / 8;
    int ret;

    memset(key_str, 0x00, 128);
    memset(src_str, 0x00, 128);
    memset(dst_str, 0x00, 256);
    memset(iv_str, 0x00, 128);
    memset(add_str, 0x00, 128);
    memset(tag_str, 0x00, 128);
    memset(output, 0x00, 128);

    key_len = unhexify( key_str, {hex_key_string} );
    pt_len = unhexify( src_str, {hex_src_string} );
    iv_len = unhexify( iv_str, {hex_iv_string} );
    add_len = unhexify( add_str, {hex_add_string} );
    unhexify( tag_str, {hex_tag_string} );

    TEST_ASSERT( gcm_init( &ctx, key_str, key_len * 8 ) == {init_result} );
    if( {init_result} == 0 )
    {
        ret = gcm_auth_decrypt( &ctx, pt_len, iv_str, iv_len, add_str, add_len, tag_str, tag_len, src_str, output );

        if( strcmp( "FAIL", {pt_result} ) == 0 )
        {
            TEST_ASSERT( ret == POLARSSL_ERR_GCM_AUTH_FAILED );
        }
        else
        {
            hexify( dst_str, output, pt_len );

            TEST_ASSERT( strcmp( (char *) dst_str, {pt_result} ) == 0 );
        }
    }
}
END_CASE

BEGIN_CASE
gcm_selftest:
{
    TEST_ASSERT( gcm_self_test( 0 ) == 0 );
}
END_CASE