CryptoPerf-CryptoKit.swift

import Cocoa
import CryptoKit

// ANSI X9.63 formatted, 0x04 used to indicate uncompressed.
let publicKeyData = Data([0x04, 0x77, 0xd2, 0x8f, 0x10, 0x3c, 0x37, 0xeb, 0x03, 0xd6, 0x2d, 0xec,
                          0xd4, 0xfd, 0xbd, 0xa0, 0x1d, 0xd6, 0x9f, 0xea, 0x87, 0x83, 0x25, 0xbc,
                          0x1b, 0xeb, 0xc5, 0x07, 0x4a, 0x87, 0x64, 0x55, 0xeb, 0x9d, 0x2f, 0x4e,
                          0x71, 0x9b, 0xa0, 0xa0, 0x83, 0x8d, 0xf3, 0xb0, 0x74, 0x79, 0xed, 0x21,
                          0x79, 0x35, 0x8f, 0x71, 0x1f, 0xe9, 0xd0, 0x04, 0xb6, 0x93, 0xc6, 0x29,
                          0x22, 0xe9, 0x57, 0x72, 0xd0])

let signatureData = Data([0x30, 0x44, 0x02, 0x20, 0x61, 0x51, 0x6A, 0x23, 0xF9, 0x99, 0x62, 0xB4,
                          0x41, 0x7C, 0x87, 0xD2, 0x65, 0x92, 0xB5, 0x20, 0x60, 0xB1, 0x9C, 0x5B,
                          0x74, 0x81, 0xA2, 0x31, 0x8C, 0x66, 0x5A, 0xF5, 0x40, 0xAE, 0x72, 0x1C,
                          0x02, 0x20, 0x69, 0x61, 0x1C, 0x07, 0x3C, 0x6E, 0x34, 0xA3, 0x58, 0x34,
                          0x3E, 0x9A, 0xD4, 0x3B, 0x49, 0x66, 0xCE, 0x0F, 0x9A, 0x89, 0x14, 0xC5,
                          0xE7, 0x7F, 0x2C, 0xB3, 0xFE, 0x28, 0xAE, 0x2B, 0xF4, 0xD0])

let messageData = Data([0x38, 0x90, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0xbd, 0x3b, 0xde, 0x89, 0x4f, 0x6d, 0xdb, 0x7e, 0x5a, 0xe8, 0x9e, 0x7d, 0x7c, 0x1e, 0xef, 0x5c, 0x27, 0x18, 0x75, 0xc5, 0xa2, 0xbd, 0x6b, 0x75, 0xfa, 0xba, 0x07, 0xc8, 0xc8, 0x42, 0x39, 0x02, 0xe8, 0xc4, 0xd7, 0xa4, 0xeb, 0xf3, 0x54, 0x2d, 0x7d, 0x8e, 0xee, 0x65, 0xa9, 0x96, 0xbb, 0x45, 0x21, 0x1e, 0x54, 0x6b, 0xd9, 0x95, 0xae, 0x5b, 0x1d, 0x09, 0x9a, 0x90, 0x46, 0x48, 0x86, 0x98, 0x1b, 0x9e, 0x47, 0x99, 0x71, 0x01, 0x00, 0x00, 0x21, 0x4e, 0x00, 0x00, 0xbf, 0x17, 0x40, 0xf6, 0xc1, 0xe1, 0xf9, 0x13, 0xd2, 0xf3, 0x07, 0xb2, 0x9b, 0x80, 0x82, 0x55, 0x1b, 0xa9, 0xa5, 0xc5])

let publicKey = try! P256.Signing.PublicKey(x963Representation: publicKeyData)
let signature = try! P256.Signing.ECDSASignature.init(derRepresentation: signatureData)

let start = DispatchTime.now()
let result = publicKey.isValidSignature(signature, for:messageData)
let end = DispatchTime.now()

let diff = Double((end.uptimeNanoseconds - start.uptimeNanoseconds)) as Double / 1000 / 1000

if (result) {
    print("Signature is valid.")
} else {
    print("Signature is not valid.")
}

print("Execution: \(diff) milliseconds.")

CryptoPerf-Transforms.swift

import Cocoa
import CryptoKit
import SecurityFoundation

// ANSI X9.63 formatted, 0x04 used to indicate uncompressed.
let publicKey = Data([0x04, 0x77, 0xd2, 0x8f, 0x10, 0x3c, 0x37, 0xeb, 0x03, 0xd6, 0x2d, 0xec,
                      0xd4, 0xfd, 0xbd, 0xa0, 0x1d, 0xd6, 0x9f, 0xea, 0x87, 0x83, 0x25, 0xbc,
                      0x1b, 0xeb, 0xc5, 0x07, 0x4a, 0x87, 0x64, 0x55, 0xeb, 0x9d, 0x2f, 0x4e,
                      0x71, 0x9b, 0xa0, 0xa0, 0x83, 0x8d, 0xf3, 0xb0, 0x74, 0x79, 0xed, 0x21,
                      0x79, 0x35, 0x8f, 0x71, 0x1f, 0xe9, 0xd0, 0x04, 0xb6, 0x93, 0xc6, 0x29,
                      0x22, 0xe9, 0x57, 0x72, 0xd0])

// Signature has been re-formatted as a SEQUENCE(R, S)
let signature = Data([0x30, 0x44, 0x02, 0x20, 0x61, 0x51, 0x6A, 0x23, 0xF9, 0x99, 0x62, 0xB4,
                      0x41, 0x7C, 0x87, 0xD2, 0x65, 0x92, 0xB5, 0x20, 0x60, 0xB1, 0x9C, 0x5B,
                      0x74, 0x81, 0xA2, 0x31, 0x8C, 0x66, 0x5A, 0xF5, 0x40, 0xAE, 0x72, 0x1C,
                      0x02, 0x20, 0x69, 0x61, 0x1C, 0x07, 0x3C, 0x6E, 0x34, 0xA3, 0x58, 0x34,
                      0x3E, 0x9A, 0xD4, 0x3B, 0x49, 0x66, 0xCE, 0x0F, 0x9A, 0x89, 0x14, 0xC5,
                      0xE7, 0x7F, 0x2C, 0xB3, 0xFE, 0x28, 0xAE, 0x2B, 0xF4, 0xD0])

// A SHA-2-256 hash of the message.
let digest = Data([0x4D, 0xD5, 0xFB, 0xD7, 0x96, 0xB4, 0x37, 0xCF, 0x43, 0x4A, 0xA5, 0x2D,
                   0x30, 0x56, 0x7F, 0x1F, 0xF9, 0x26, 0x43, 0xE7, 0x88, 0x59, 0xCF, 0x6C,
                   0xB6, 0x43, 0x50, 0xFC, 0x2C, 0x23, 0x18, 0x6C])


let attributes = [
    kSecAttrKeyType: kSecAttrKeyTypeEC,
    kSecAttrKeyClass: kSecAttrKeyClassPublic,
    kSecAttrKeySizeInBits: 256
    ] as [CFString : Any]

let key = SecKeyCreateWithData(publicKey as CFData, attributes as CFDictionary, nil)!

let transform = SecVerifyTransformCreate(key, signature as CFData, nil)!

// Set to SHA2 family, 256-bits
SecTransformSetAttribute(transform, kSecInputIsAttributeName, kSecInputIsDigest, nil)
SecTransformSetAttribute(transform, kSecTransformInputAttributeName, digest as CFData, nil)
SecTransformSetAttribute(transform, kSecDigestTypeAttribute, kSecDigestSHA2, nil)
SecTransformSetAttribute(transform, kSecDigestLengthAttribute, 256 as CFNumber, nil)

let start = DispatchTime.now()
let response = SecTransformExecute(transform, nil) as! Int32
let end = DispatchTime.now()

// Divide by 1000 once to go to microseconds, 1000 again to milliseconds
let milliSeconds = Double((end.uptimeNanoseconds - start.uptimeNanoseconds)) as Double / 1000.0 / 1000.0

print("Execution: \(milliSeconds) milliseconds.")

if (response == 1) {
    print("Signature is valid.")
} else {
    print("Signature is not valid.")
}