swift之md5

gistfile1.txt

// TargetName-Bridging-Header.h
#import <CommonCrypto/CommonCrypto.h>

// StringMD5.swift
extension String {
     var MD5: String {
        let cString = self.cStringUsingEncoding(NSUTF8StringEncoding)
        let length = CUnsignedInt(
                self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding)
            )
        let result = UnsafeMutablePointer<CUnsignedChar>.alloc(
                        Int(CC_MD5_DIGEST_LENGTH)
                     )
        CC_MD5(cString!, length, result)
        return String(format:"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02\ x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15])
} }