Function sha512_file

sha512.c:347–374

* output = SHA-512( file contents ) */

 * output = SHA-512( file contents )
 */
int sha512_file( const char *path, unsigned char output[64], int is384 )
{
    FILE *f;
    size_t n;
    sha512_context ctx;
    unsigned char buf[1024];

    if( ( f = fopen( path, "rb" ) ) == NULL )
        return( POLARSSL_ERR_SHA512_FILE_IO_ERROR );

    sha512_init( &ctx );
    sha512_starts( &ctx, is384 );

    while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
        sha512_update( &ctx, buf, n );

    sha512_finish( &ctx, output );
    sha512_free( &ctx );

    if( ferror( f ) != 0 )
    {
        fclose( f );
        return( POLARSSL_ERR_SHA512_FILE_IO_ERROR );
    }

    fclose( f );
    return( 0 );
}
#endif /* POLARSSL_FS_IO */

/*