CommonCryptoTest

CommonCryptoTest-Bridging-Header.h

#import <CommonCrypto/CommonCrypto.h>

main.swift

protocol Digestible {
    func sha1Digest() -> [UInt8]
}

extension Array : Digestible {
    func sha1Digest() -> [UInt8] {
        return self.withUnsafeBufferPointer { (arrayBuffer) -> [UInt8] in
            var hash = Array<UInt8>(count: Int(CC_SHA1_DIGEST_LENGTH), repeatedValue: 0)
            CC_SHA1(unsafeBitCast(arrayBuffer, UnsafePointer<Void>.self), UInt32(self.count * sizeof(T)), &hash)
            return hash
        }
    }
}

let array : [Double] = [0, 1, 2, 3, 4, 5, 6]
println(array.sha1Digest())