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Swift MD5
extension String {
func md5() -> String! {
let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
let strLen = CUnsignedInt(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
let digestLen = Int(CC_MD5_DIGEST_LENGTH)
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen)
CC_MD5(str!, strLen, result)
var hash = NSMutableString()
for i in 0..<digestLen {
hash.appendFormat("%02x", result[i])
return String(format: hash)
#import <CommonCrypto/CommonCrypto.h> // required for MD5
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ciryon commented Jul 7, 2015

return String(format: hash as String)
on last call

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Hi, first i want to thank you for that snippet
and then i want to mention, that instruments and its leak check discovered a memory leak.
As described here i added
which resolved the problem in instruments for me
Just wanted to share my findings :)

best regards

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