SwiftBase32/SecEncodeTransformTests/TTTDataTransformer.m

// original: https://github.com/mattt/TransformerKit/blob/master/TransformerKit%2FTTTDataTransformer.m
// copied and modified for benchmarking

// TTTDataTransformer.m
//
// Copyright (c) 2014 Mattt Thompson (http://mattt.me)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#import <Security/Security.h>

#import "TTTDataTransformer.h"

NSString * TTTBase32EncodedStringFromData(NSData *data) {
    SecTransformRef transform = SecEncodeTransformCreate(kSecBase32Encoding, NULL);
    SecTransformSetAttribute(transform, kSecTransformInputAttributeName, (__bridge CFDataRef)data, NULL);
    NSData *encodedData = (__bridge_transfer NSData *)SecTransformExecute(transform, NULL);
    CFRelease(transform);

    return [[NSString alloc] initWithData:encodedData encoding:NSUTF8StringEncoding];
}

NSData * TTTDataFromBase32EncodedString(NSString *string) {
    SecTransformRef transform = SecDecodeTransformCreate(kSecBase32Encoding, NULL);
    SecTransformSetAttribute(transform, kSecTransformInputAttributeName, (__bridge CFDataRef)[string dataUsingEncoding:NSUTF8StringEncoding], NULL);
    NSData *decodedData = (__bridge_transfer NSData *)SecTransformExecute(transform, NULL);
    CFRelease(transform);

    return decodedData;
}