Cooca Base64 Encode & Decode

Base64.m

#include <CoreFoundation/CoreFoundation.h>
#include <Security/Security.h>

static NSData *base64helper(NSData *input, SecTransformRef transform)
{
    NSData *output = nil;

    if (!transform)
        return nil;

    if (SecTransformSetAttribute(transform, kSecTransformInputAttributeName, input, NULL))
        output = (NSData *)SecTransformExecute(transform, NULL);

    CFRelease(transform);

    return [output autorelease];
}

NSString *base64enc(NSData *input)
{
    SecTransformRef transform = SecEncodeTransformCreate(kSecBase64Encoding, NULL);

    return [[[NSString alloc] initWithData:base64helper(input, transform) encoding:NSASCIIStringEncoding] autorelease];
}

NSData *base64dec(NSString *input)
{
    SecTransformRef transform = SecDecodeTransformCreate(kSecBase64Encoding, NULL);

    return base64helper([input dataUsingEncoding:NSASCIIStringEncoding], transform);
}