Swift - MD5 加密

import CommonCrypto

extension String
{
    var md5: String
    {
        let ccharArray = self.cString(using: String.Encoding.utf8)
    
        var uint8Array = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
        
        CC_MD5(ccharArray, CC_LONG(ccharArray!.count - 1), &uint8Array)
        
        return uint8Array.reduce("") { $0 + String(format: "%02X", $1)
        }
    }
}