C++ (Cpp) mbedtls_hmac_drbg_write_seed_file примеры использования

Пример #1

Файл: hmac_drbg.c Проект: ARMmbed/mbedtls

int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )
{
    int ret = 0;
    FILE *f = NULL;
    size_t n;
    unsigned char buf[ MBEDTLS_HMAC_DRBG_MAX_INPUT ];
    unsigned char c;

    if( ( f = fopen( path, "rb" ) ) == NULL )
        return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );

    n = fread( buf, 1, sizeof( buf ), f );
    if( fread( &c, 1, 1, f ) != 0 )
    {
        ret = MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG;
        goto exit;
    }
    if( n == 0 || ferror( f ) )
    {
        ret = MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
        goto exit;
    }
    fclose( f );
    f = NULL;

    ret = mbedtls_hmac_drbg_update_ret( ctx, buf, n );

exit:
    mbedtls_platform_zeroize( buf, sizeof( buf ) );
    if( f != NULL )
        fclose( f );
    if( ret != 0 )
        return( ret );
    return( mbedtls_hmac_drbg_write_seed_file( ctx, path ) );
}

Пример #2

Файл: hmac_drbg.c Проект: 0buffer/polarssl

int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )
{
    FILE *f;
    size_t n;
    unsigned char buf[ MBEDTLS_HMAC_DRBG_MAX_INPUT ];

    if( ( f = fopen( path, "rb" ) ) == NULL )
        return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );

    fseek( f, 0, SEEK_END );
    n = (size_t) ftell( f );
    fseek( f, 0, SEEK_SET );

    if( n > MBEDTLS_HMAC_DRBG_MAX_INPUT )
    {
        fclose( f );
        return( MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG );
    }

    if( fread( buf, 1, n, f ) != n )
    {
        fclose( f );
        return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );
    }

    fclose( f );

    mbedtls_hmac_drbg_update( ctx, buf, n );

    return( mbedtls_hmac_drbg_write_seed_file( ctx, path ) );
}