SwiftMD5 is a pure Swift implementation for the MD5 algorithm.

import SwiftMD5
"The quick brown fox jumps over the lazy dog".md5
// "9e107d9d372bb6826bd81d3542a419d6"

let bytes = [Byte]("The quick brown fox jumps over the lazy dog".utf8)
// md5 outputs a 16-byte digest
let encodedBytes: [Byte] = md5(bytes)
// [158, 16, 125, 157, 55, 43, 182, 130, 107, 216, 29, 53, 66, 164, 25, 214]
// Each byte would normally be encoded to a padded hexadecimal in a string
// 9e107d9d372bb6826bd81d3542a419d6

To add SwiftMD5 to your application:

Using Carthage

• Add SwiftMD5 to your Cartfile
• Run carthage update
• Drag the relevant copy of SwiftMD5 into your project.
• Expand the Link Binary With Libraries phase
• Click the + and add SwiftMD5
• Click the + at the top left corner to add a Copy Files build phase
• Set the directory to Frameworks
• Click the + and add SwiftMD5

Using Git Submodules

• Clone SwiftMD5 as a submodule into the directory of your choice
• Run git submodule init -i --recursive
• Drag SwiftMD5.xcodeproj into your project tree as a subproject
• Under your project's Build Phases, expand Target Dependencies
• Click the + and add SwiftMD5
• Expand the Link Binary With Libraries phase
• Click the + and add SwiftMD5
• Click the + at the top left corner to add a Copy Files build phase
• Set the directory to Frameworks
• Click the + and add SwiftMD5

SwiftMD5 is released under the BSD license.