//
//  CryptoSwift
//
//  Copyright (C) 2014-2022 Marcin Krzyżanowski <marcin@krzyzanowskim.com>
//  This software is provided 'as-is', without any express or implied warranty.
//
//  In no event will the authors be held liable for any damages arising from the use of this software.
//
//  Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
//
//  - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required.
//  - Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
//  - This notice may not be removed or altered from any source or binary distribution.
//

// http://www.di-mgt.com.au/sha_testvectors.html (http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf)
//

import Foundation
import XCTest
@testable import CryptoSwift

final class DigestTests: XCTestCase {
  func testMD5() {
    XCTAssertEqual("123".md5(), "202cb962ac59075b964b07152d234b70", "MD5 calculation failed")
    XCTAssertEqual("".md5(), "d41d8cd98f00b204e9800998ecf8427e", "MD5 calculation failed")
    XCTAssertEqual("a".md5(), "0cc175b9c0f1b6a831c399e269772661", "MD5 calculation failed")
    XCTAssertEqual("abc".md5(), "900150983cd24fb0d6963f7d28e17f72", "MD5 calculation failed")
    XCTAssertEqual("message digest".md5(), "f96b697d7cb7938d525a2f31aaf161d0", "MD5 calculation failed")
    XCTAssertEqual("abcdefghijklmnopqrstuvwxyz".md5(), "c3fcd3d76192e4007dfb496cca67e13b", "MD5 calculation failed")
    XCTAssertEqual("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".md5(), "d174ab98d277d9f5a5611c2c9f419d9f", "MD5 calculation failed")
    XCTAssertEqual("12345678901234567890123456789012345678901234567890123456789012345678901234567890".md5(), "57edf4a22be3c955ac49da2e2107b67a", "MD5 calculation failed")
  }

  func testSHA1() {
    XCTAssertEqual(SHA1().calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "a9993e364706816aba3e25717850c26c9cd0d89d")
    XCTAssertEqual(SHA1().calculate(for: Array<UInt8>(hex: "")).toHexString(), "da39a3ee5e6b4b0d3255bfef95601890afd80709")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha1(), "84983e441c3bd26ebaae4aa1f95129e5e54670f1")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha1(), "a49b2446a02c645bf419f995b67091253a04a259")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha1(), Array<UInt8>(hex: "34aa973cd4c4daa4f61eeb2bdbad27316534016f"), "One million (1,000,000) repetitions of the character 'a' (0x61)")

    // https://github.com/krzyzanowskim/CryptoSwift/issues/363
    XCTAssertEqual("1477304791&1XpnGSRhOlZz2etXMeOdfNaHILTjW16U&8mpBBbzwsgs".sha1(), "0809bbf8489c594131c2030a84be364a0851a635", "Failed")
    XCTAssertEqual("1477304791&1XpnGSRhOlZz2etXMeOdfNaHILTjW16U&8mpBBbzwsgsa".sha1(), "d345b525ebada7becc8107c54e07fa88644471f5", "Failed")
    XCTAssertEqual("1477304791&1XpnGSRhOlZz2etXMeOdfNaHILTjW16U&8mpBBbzwsg".sha1(), "c106aa0a98606294ee35fd2d937e928ebb5339e0", "Failed")
  }

  func testSHA2() {
    XCTAssertEqual(SHA2(variant: .sha224).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7")
    XCTAssertEqual(SHA2(variant: .sha256).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
    XCTAssertEqual(SHA2(variant: .sha384).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7")
    XCTAssertEqual(SHA2(variant: .sha512).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")

    XCTAssertEqual(SHA2(variant: .sha224).calculate(for: Array<UInt8>(hex: "")).toHexString(), "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f")
    XCTAssertEqual(SHA2(variant: .sha256).calculate(for: Array<UInt8>(hex: "")).toHexString(), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
    XCTAssertEqual(SHA2(variant: .sha384).calculate(for: Array<UInt8>(hex: "")).toHexString(), "38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b")
    XCTAssertEqual(SHA2(variant: .sha512).calculate(for: Array<UInt8>(hex: "")).toHexString(), "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e")

    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha224(), "75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha256(), "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha384(), "3391fdddfc8dc7393707a65b1b4709397cf8b1d162af05abfe8f450de5f36bc6b0455a8520bc4e6f5fe95b1fe3c8452b")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha512(), "204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c33596fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445")

    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha224(), "c97ca9a559850ce97a04a96def6d99a9e0e0e2ab14e6b8df265fc0b3")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha256(), "cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha384(), "09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712fcc7c71a557e2db966c3e9fa91746039")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha512(), "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909")

    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha224(), Array<UInt8>(hex: "20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha256(), Array<UInt8>(hex: "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha384(), Array<UInt8>(hex: "9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b07b8b3dc38ecc4ebae97ddd87f3d8985"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha512(), Array<UInt8>(hex: "e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973ebde0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b"), "One million (1,000,000) repetitions of the character 'a' (0x61)")

    XCTAssertEqual("Rosetta code".sha256(), "764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf", "SHA256 calculation failed")
    XCTAssertEqual("The quick brown fox jumps over the lazy dog.".sha384(), "ed892481d8272ca6df370bf706e4d7bc1b5739fa2177aae6c50e946678718fc67a7af2819a021c2fc34e91bdb63409d7", "SHA384 calculation failed")
  }

  func testSHA3() {
    XCTAssertEqual(SHA3(variant: .sha224).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "e642824c3f8cf24ad09234ee7d3c766fc9a3a5168d0c94ad73b46fdf")
    XCTAssertEqual(SHA3(variant: .sha256).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532")
    XCTAssertEqual(SHA3(variant: .sha384).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "ec01498288516fc926459f58e2c6ad8df9b473cb0fc08c2596da7cf0e49be4b298d88cea927ac7f539f1edf228376d25")
    XCTAssertEqual(SHA3(variant: .sha512).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "b751850b1a57168a5693cd924b6b096e08f621827444f70d884f5d0240d2712e10e116e9192af3c91a7ec57647e3934057340b4cf408d5a56592f8274eec53f0")
    XCTAssertEqual(SHA3(variant: .keccak224).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "c30411768506ebe1c2871b1ee2e87d38df342317300a9b97a95ec6a8")
    XCTAssertEqual(SHA3(variant: .keccak256).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45")
    XCTAssertEqual(SHA3(variant: .keccak384).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "f7df1165f033337be098e7d288ad6a2f74409d7a60b49c36642218de161b1f99f8c681e4afaf31a34db29fb763e3c28e")
    XCTAssertEqual(SHA3(variant: .keccak512).calculate(for: Array<UInt8>(hex: "616263")).toHexString(), "18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96")

    XCTAssertEqual(SHA3(variant: .sha224).calculate(for: Array<UInt8>(hex: "")).toHexString(), "6b4e03423667dbb73b6e15454f0eb1abd4597f9a1b078e3f5b5a6bc7")
    XCTAssertEqual(SHA3(variant: .sha256).calculate(for: Array<UInt8>(hex: "")).toHexString(), "a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a")
    XCTAssertEqual(SHA3(variant: .sha384).calculate(for: Array<UInt8>(hex: "")).toHexString(), "0c63a75b845e4f7d01107d852e4c2485c51a50aaaa94fc61995e71bbee983a2ac3713831264adb47fb6bd1e058d5f004")
    XCTAssertEqual(SHA3(variant: .sha512).calculate(for: Array<UInt8>(hex: "")).toHexString(), "a69f73cca23a9ac5c8b567dc185a756e97c982164fe25859e0d1dcc1475c80a615b2123af1f5f94c11e3e9402c3ac558f500199d95b6d3e301758586281dcd26")
    XCTAssertEqual(SHA3(variant: .keccak224).calculate(for: Array<UInt8>(hex: "")).toHexString(), "f71837502ba8e10837bdd8d365adb85591895602fc552b48b7390abd")
    XCTAssertEqual(SHA3(variant: .keccak256).calculate(for: Array<UInt8>(hex: "")).toHexString(), "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470")
    XCTAssertEqual(SHA3(variant: .keccak384).calculate(for: Array<UInt8>(hex: "")).toHexString(), "2c23146a63a29acf99e73b88f8c24eaa7dc60aa771780ccc006afbfa8fe2479b2dd2b21362337441ac12b515911957ff")
    XCTAssertEqual(SHA3(variant: .keccak512).calculate(for: Array<UInt8>(hex: "")).toHexString(), "0eab42de4c3ceb9235fc91acffe746b29c29a8c366b7c60e4e67c466f36a4304c00fa9caf9d87976ba469bcbe06713b435f091ef2769fb160cdab33d3670680e")

    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.sha224), "8a24108b154ada21c9fd5574494479ba5c7e7ab76ef264ead0fcce33")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.sha256), "41c0dba2a9d6240849100376a8235e2c82e1b9998a999e21db32dd97496d3376")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.sha384), "991c665755eb3a4b6bbdfb75c78a492e8c56a22c5c4d7e429bfdbc32b9d4ad5aa04a1f076e62fea19eef51acd0657c22")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.sha512), "04a371e84ecfb5b8b77cb48610fca8182dd457ce6f326a0fd3d7ec2f1e91636dee691fbe0c985302ba1b0d8dc78c086346b533b49c030d99a27daf1139d6e75e")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.keccak224), "e51faa2b4655150b931ee8d700dc202f763ca5f962c529eae55012b6")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.keccak256), "45d3b367a6904e6e8d502ee04999a7c27647f91fa845d456525fd352ae3d7371")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.keccak384), "b41e8896428f1bcbb51e17abd6acc98052a3502e0d5bf7fa1af949b4d3c855e7c4dc2c390326b3f3e74c7b1e2b9a3657")
    XCTAssertEqual("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".sha3(.keccak512), "6aa6d3669597df6d5a007b00d09c20795b5c4218234e1698a944757a488ecdc09965435d97ca32c3cfed7201ff30e070cd947f1fc12b9d9214c467d342bcba5d")

    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.sha224), "543e6868e1666c1a643630df77367ae5a62a85070a51c14cbf665cbc")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.sha256), "916f6061fe879741ca6469b43971dfdb28b1a32dc36cb3254e812be27aad1d18")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.sha384), "79407d3b5916b59c3e30b09822974791c313fb9ecc849e406f23592d04f625dc8c709b98b43b3852b337216179aa7fc7")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.sha512), "afebb2ef542e6579c50cad06d2e578f9f8dd6881d7dc824d26360feebf18a4fa73e3261122948efcfd492e74e82e2189ed0fb440d187f382270cb455f21dd185")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.keccak224), "344298994b1b06873eae2ce739c425c47291a2e24189e01b524f88dc")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.keccak256), "f519747ed599024f3882238e5ab43960132572b7345fbeb9a90769dafd21ad67")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.keccak384), "cc063f34685135368b34f7449108f6d10fa727b09d696ec5331771da46a923b6c34dbd1d4f77e595689c1f3800681c28")
    XCTAssertEqual("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".sha3(.keccak512), "ac2fb35251825d3aa48468a9948c0a91b8256f6d97d8fa4160faff2dd9dfcc24f3f1db7a983dad13d53439ccac0b37e24037e7b95f80f59f37a2f683c4ba4682")

    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.sha224), Array<UInt8>(hex: "d69335b93325192e516a912e6d19a15cb51c6ed5c15243e7a7fd653c"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.sha256), Array<UInt8>(hex: "5c8875ae474a3634ba4fd55ec85bffd661f32aca75c6d699d0cdcb6c115891c1"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.sha384), Array<UInt8>(hex: "eee9e24d78c1855337983451df97c8ad9eedf256c6334f8e948d252d5e0e76847aa0774ddb90a842190d2c558b4b8340"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.sha512), Array<UInt8>(hex: "3c3a876da14034ab60627c077bb98f7e120a2a5370212dffb3385a18d4f38859ed311d0a9d5141ce9cc5c66ee689b266a8aa18ace8282a0e0db596c90b0a7b87"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.keccak224), Array<UInt8>(hex: "19f9167be2a04c43abd0ed554788101b9c339031acc8e1468531303f"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.keccak256), Array<UInt8>(hex: "fadae6b49f129bbb812be8407b7b2894f34aecf6dbd1f9b0f0c7e9853098fc96"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.keccak384), Array<UInt8>(hex: "0c8324e1ebc182822c5e2a086cac07c2fe00e3bce61d01ba8ad6b71780e2dec5fb89e5ae90cb593e57bc6258fdd94e17"), "One million (1,000,000) repetitions of the character 'a' (0x61)")
    XCTAssertEqual(Array<UInt8>(repeating: 0x61, count: 1_000_000).sha3(.keccak512), Array<UInt8>(hex: "5cf53f2e556be5a624425ede23d0e8b2c7814b4ba0e4e09cbbf3c2fac7056f61e048fc341262875ebc58a5183fea651447124370c1ebf4d6c89bc9a7731063bb"), "One million (1,000,000) repetitions of the character 'a' (0x61)")

    // *** Multiple of block size ***

    // keccak block size bytes
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 144).sha3(.keccak224), Array<UInt8>(hex: "a50976d8ed54c961a052bfd01a64cd79b11928a9d5b75146a0828888"), "Block size bytes for keccak224")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 136).sha3(.keccak256), Array<UInt8>(hex: "3a5912a7c5faa06ee4fe906253e339467a9ce87d533c65be3c15cb231cdb25f9"), "Block size bytes for keccak256")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 104).sha3(.keccak384), Array<UInt8>(hex: "768e10c2eb9903fba6bf290669bf98bd03ce42e7492da9abb88cbbe2212ed153c857e4e883fb1b03a498391935ec6112"), "Block size bytes for keccak384")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 72).sha3(.keccak512), Array<UInt8>(hex: "bcf38e5b375422155b4d8eb150682a14778b0695d709cec479d013a772497bc8d7050ef2a23d69609d609b15e5001f275c4619270ffbd6e8c06a7a5bf72334b3"), "Block size bytes for keccak512")

    // keccak two times block size bytes
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 288).sha3(.keccak224), Array<UInt8>(hex: "846f930bf21e7ec2175a635379adbdbce9ed9de6a34396c4a11aaf3c"), "Two times block size bytes for keccak224")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 272).sha3(.keccak256), Array<UInt8>(hex: "a8005c7a3125b6c3629b4181eca54d18721e41fef639718d205beb00b366ed7d"), "Two times block size bytes for keccak256")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 208).sha3(.keccak384), Array<UInt8>(hex: "db6451e6fb59ca16c9ba896de2967b07ca331e9558e21257cb6b26f126ed480c841d37788907f77ef71f8258218b0203"), "Two times block size bytes for keccak384")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 144).sha3(.keccak512), Array<UInt8>(hex: "04ddaacd88ce54a4acb468b792d5177ace573e9871dc10b33d02be637b674373601ba5f433b67cc6ba8dc3a1707052f1f6bffc55ef1580aca021ead8bc8e1f22"), "Two times block size bytes for keccak512")

    // nist sha3 block size bytes
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 144).sha3(.sha224), Array<UInt8>(hex: "f2b8486fceee2c6a11a604ce4efe217da854829c2c2dcc9a23758b4d"), "Block size bytes for sha3 sha224")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 136).sha3(.sha256), Array<UInt8>(hex: "e772c9cf9eb9c991cdfcf125001b454fdbc0a95f188d1b4c844aa032ad6e075e"), "Block size bytes for sha3 sha256")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 104).sha3(.sha384), Array<UInt8>(hex: "aaed6beb61b1f9a9b469d38a27a35edde7f676f4603e67f5424c7588043b869ebbfcfc3ecee2ae6f5ecfaf7f706c49e3"), "Block size bytes for sha3 sha384")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 72).sha3(.sha512), Array<UInt8>(hex: "f8d76fdd8a082a67eaab47b5518ac486cb9a90dcb9f3c9efcfd86d5c8b3f1831601d3c8435f84b9e56da91283d5b98040e6e7b2c8dd9aa5bd4ebdf1823a7cf29"), "Block size bytes for sha3 sha512")

    // nist sha3 two times block size bytes
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 288).sha3(.sha224), Array<UInt8>(hex: "920370d3fec17c0ecbc2b5b7cd64f551860fb93384e0dc4fcaf2e1ba"), "Two times block size bytes for sha3 sha224")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 272).sha3(.sha256), Array<UInt8>(hex: "5d86a8cc4aa8f0d98146a747281865a625a19f9580eef32e38905920bc532c5c"), "Two times block size bytes for sha3 sha256")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 208).sha3(.sha384), Array<UInt8>(hex: "e741867850b8753bf7fa714b11c1ca9904d0494adaf5e2db43cca42f39637bd67685279d9dfcc45d56e8c288273904af"), "Two times block size bytes for sha3 sha384")
    XCTAssertEqual(Array<UInt8>(repeating: 0x00, count: 144).sha3(.sha512), Array<UInt8>(hex: "07625da1770011d59b0a71a8dec551f0ddf1917e4117fc860bd7e0a0e42f3e012284f86d509e2f22a8682aea5930197fc1f3c353d0141665c9ac2643278c3821"), "Two times block size bytes for sha3 sha512")
    // *** End Multiple of block size ***
  }

  func testMD5Data() {
    let data = [0x31, 0x32, 0x33] as Array<UInt8> // "1", "2", "3"
    XCTAssertEqual(Digest.md5(data), [0x20, 0x2C, 0xB9, 0x62, 0xAC, 0x59, 0x07, 0x5B, 0x96, 0x4B, 0x07, 0x15, 0x2D, 0x23, 0x4B, 0x70], "MD5 calculation failed")
  }

  func testMD5Updates() {
    do {
      var hash = MD5()
      _ = try hash.update(withBytes: [0x31, 0x32])
      _ = try hash.update(withBytes: [0x33])
      let result = try hash.finish()
      XCTAssertEqual(result, [0x20, 0x2C, 0xB9, 0x62, 0xAC, 0x59, 0x07, 0x5B, 0x96, 0x4B, 0x07, 0x15, 0x2D, 0x23, 0x4B, 0x70])
    } catch {
      XCTFail()
    }
  }

  func testSHA1Updatable1() {
    do {
      var hash = SHA1()
      _ = try hash.update(withBytes: [0x31, 0x32])
      _ = try hash.update(withBytes: [0x33])
      XCTAssertEqual(try hash.finish().toHexString(), "40bd001563085fc35165329ea1ff5c5ecbdbbeef", "Failed")
    } catch {
      XCTFail()
    }
  }

  func testSHA1Updatable2() {
    do {
      var hash = SHA1()
      _ = try hash.update(withBytes: [0x31, 0x32])
      _ = try hash.update(withBytes: [0x33])
      _ = try hash.update(withBytes: Array<UInt8>(repeating: 0x33, count: 64))
      XCTAssertEqual(try hash.finish().toHexString(), "0e659367eff83a6b868a35b96ac305b270025e86", "Failed")
    } catch {
      XCTFail()
    }
  }

  func testCRC32() {
    let data: Data = Data(bytes: [49, 50, 51] as Array<UInt8>, count: 3)
    XCTAssertEqual(data.crc32(seed: nil).toHexString(), "884863d2", "CRC32 calculation failed")

    XCTAssertEqual("".crc32(seed: nil), "00000000", "CRC32 calculation failed")
  }

  func testCRC32C() {
    let data: Data = Data(bytes: [0x32, 0, 0, 0] as Array<UInt8>, count: 4)
    XCTAssertEqual(data.crc32c(seed: nil).toHexString(), "c941cdf0", "CRC32C calculation failed")
    XCTAssertEqual("".crc32c(seed: nil), "00000000", "CRC32 calculation failed")
  }

  func testCRC32NotReflected() {
    let bytes: Array<UInt8> = [0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39]
    let data: Data = Data(bytes: bytes, count: bytes.count)
    XCTAssertEqual(data.crc32(seed: nil, reflect: false).toHexString(), "fc891918", "CRC32 (with reflection) calculation failed")

    XCTAssertEqual("".crc32(seed: nil, reflect: false), "00000000", "CRC32 (with reflection) calculation failed")
  }

  func testCRC16() {
    let result = Checksum.crc16([49, 50, 51, 52, 53, 54, 55, 56, 57] as Array<UInt8>)
    XCTAssert(result == 0xBB3D, "CRC16 failed")
  }

  func testChecksum() {
    let data: Data = Data(bytes: [49, 50, 51] as Array<UInt8>, count: 3)
    XCTAssert(data.checksum() == 0x96, "Invalid checksum")
  }

  func testChecksumPerformance() {
    let len = 1_000_000
    let a = [UInt8](unsafeUninitializedCapacity: len) { buf, count in
      for i in 0..<len {
        buf[i] = UInt8.random(in: 0...UInt8.max)
      }
      count = len
    }
    let data: Data = Data(bytes: a, count: len)
    self.measure {
      _ = data.checksum()
    }
  }

  func testSHAPartialUpdates() {
    do {
      let testSize = 1024 * 1024 * 5
      let buf = malloc(testSize)!
      defer { free(buf) }
      let input = Data(bytes: buf, count: testSize)

      // SHA1
      let sha1Once = SHA1().calculate(for: input.bytes)

      var sha1Partial = SHA1()
      for batch in input.batched(by: 17) {
        _ = try sha1Partial.update(withBytes: batch.bytes)
      }
      let sha1Result = try sha1Partial.finish()
      XCTAssertEqual(sha1Once, sha1Result)

      // SHA2
      let sha2Once = SHA2(variant: .sha224).calculate(for: input.bytes)

      var sha2Partial = SHA2(variant: .sha224)
      for batch in input.batched(by: 17) {
        _ = try sha2Partial.update(withBytes: batch.bytes)
      }
      let sha2Result = try sha2Partial.finish()
      XCTAssertEqual(sha2Once, sha2Result)

      // SHA3
      let sha3Once = SHA3(variant: .sha224).calculate(for: input.bytes)

      var sha3Partial = SHA3(variant: .sha224)
      for batch in input.batched(by: 17) {
        _ = try sha3Partial.update(withBytes: batch.bytes)
      }
      let sha3Result = try sha3Partial.finish()
      XCTAssertEqual(sha3Once, sha3Result)
    } catch {
      XCTFail(error.localizedDescription)
    }
  }
}

extension DigestTests {
  static func allTests() -> [(String, (DigestTests) -> () -> Void)] {
    let tests = [
      ("testMD5", testMD5),
      ("testSHA1", testSHA1),
      ("testSHA2", testSHA2),
      ("testSHA3", testSHA3),
      ("testMD5Data", testMD5Data),
      ("testMD5Updates", testMD5Updates),
      ("testSHA1Updatable1", testSHA1Updatable1),
      ("testSHA1Updatable2", testSHA1Updatable2),
      ("testCRC32", testCRC32),
      ("testCRC32NotReflected", testCRC32NotReflected),
      ("testCRC16", testCRC16),
      ("testChecksum", testChecksum),
      ("testSHAPartialUpdates", testSHAPartialUpdates)
    ]

    return tests
  }
}