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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| package io.eqoty | ||
|
|
||
| import io.eqoty.kryptools.aessiv.AesSIV | ||
| import kotlinx.coroutines.test.runTest | ||
| import kotlin.test.Test | ||
| import kotlin.test.assertContentEquals | ||
|
|
||
| class Aes128SivTests { | ||
|
|
||
| private val testVectors = listOf( | ||
| TestVector( | ||
| name = "Deterministic Authenticated Encryption Example", | ||
| key = "fffefdfcfbfaf9f8f7f6f5f4f3f2f1f0f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff".hexToBytes(), | ||
| ad = listOf("101112131415161718191a1b1c1d1e1f2021222324252627".hexToBytes()), | ||
| plaintext = "112233445566778899aabbccddee".hexToBytes(), | ||
| ciphertext = "85632d07c6e8f37f950acd320a2ecc9340c02b9690c4dc04daef7f6afe5c".hexToBytes() | ||
| ), | ||
| TestVector( | ||
| name = "Nonce-Based Authenticated Encryption Example", | ||
| key = "7f7e7d7c7b7a79787776757473727170404142434445464748494a4b4c4d4e4f".hexToBytes(), | ||
| ad = listOf( | ||
| "00112233445566778899aabbccddeeffdeaddadadeaddadaffeeddccbbaa99887766554433221100".hexToBytes(), | ||
| "102030405060708090a0".hexToBytes(), | ||
| "09f911029d74e35bd84156c5635688c0".hexToBytes() | ||
| ), | ||
| plaintext = "7468697320697320736f6d6520706c61696e7465787420746f20656e6372797074207573696e67205349562d414553".hexToBytes(), | ||
| ciphertext = "7bdb6e3b432667eb06f4d14bff2fbd0fcb900f2fddbe404326601965c889bf17dba77ceb094fa663b7a3f748ba8af829ea64ad544a272e9c485b62a3fd5c0d".hexToBytes() | ||
| ), | ||
| TestVector( | ||
| name = "Empty Authenticated Data And Plaintext Example", | ||
| key = "fffefdfcfbfaf9f8f7f6f5f4f3f2f1f0f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff".hexToBytes(), | ||
| ad = listOf(), | ||
| plaintext = ubyteArrayOf(), | ||
| ciphertext = "f2007a5beb2b8900c588a7adf599f172".hexToBytes() | ||
| ), | ||
| TestVector( | ||
| name = "Empty Authenticated Data And Block-Size Plaintext Example", | ||
| key = "fffefdfcfbfaf9f8f7f6f5f4f3f2f1f0f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff".hexToBytes(), | ||
| ad = listOf(), | ||
| plaintext = "00112233445566778899aabbccddeeff".hexToBytes(), | ||
| ciphertext = "f304f912863e303d5b540e5057c7010c942ffaf45b0e5ca5fb9a56a5263bb065".hexToBytes() | ||
| ) | ||
| ) | ||
|
|
||
| @Test | ||
| fun runTestVectors() = runTest { | ||
| val aesSIV = AesSIV() | ||
| testVectors.forEachIndexed { index, vector -> | ||
| println("Testing Vector #${index + 1}: ${vector.name}") | ||
| val decrypted = aesSIV.decrypt(vector.key, vector.ciphertext, vector.ad) | ||
| assertContentEquals(vector.plaintext, decrypted, "Decryption failed for vector: ${vector.name}") | ||
| println("decrypted: ${decrypted.joinToString("") { it.toString(16).padStart(2, '0') }}") | ||
| val encrypted = aesSIV.encrypt(vector.key, vector.plaintext, vector.ad) | ||
| println("encrypted: ${encrypted.joinToString("") { it.toString(16).padStart(2, '0') }}") | ||
| assertContentEquals(vector.ciphertext, encrypted, "Encryption failed for vector: ${vector.name}") | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalStdlibApi::class) | ||
| private fun String.hexToBytes() = this.hexToUByteArray() | ||
| } | ||
|
|
||
| data class TestVector( | ||
| val name: String, | ||
| val key: UByteArray, | ||
| val ad: List<UByteArray>, | ||
| val plaintext: UByteArray, | ||
| val ciphertext: UByteArray | ||
| ) |
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aes-siv/src/jsMain/kotlin/io/eqoty/kryptools/aessiv/Aes.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| package io.eqoty.kryptools.aessiv | ||
|
|
||
| import jslibs.tsstdlib.AesCbcParams | ||
| import jslibs.tsstdlib.AesCtrParams | ||
| import jslibs.tsstdlib.Crypto | ||
| import jslibs.tsstdlib.CryptoKey | ||
| import kotlinx.coroutines.await | ||
| import org.khronos.webgl.ArrayBuffer | ||
| import org.khronos.webgl.Uint8Array | ||
| import org.khronos.webgl.get | ||
| import org.khronos.webgl.set | ||
| import kotlin.experimental.xor | ||
| import kotlin.math.ceil | ||
|
|
||
| const val NB_AES_BLOCK = 16 | ||
|
|
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| val ATU8_ZERO_BLOCK get() = Uint8Array(NB_AES_BLOCK) | ||
|
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| // https://github.com/whyoleg/cryptography-kotlin/blob/d524143a0719e6926b0ae190977a7341673fa718/cryptography-random/src/wasmJsMain/kotlin/CryptographyRandom.wasmJs.kt#L40-L54 | ||
| //language=JavaScript | ||
| private fun getCrypto(): Crypto { | ||
| return js( | ||
| code = """ | ||
| var isNodeJs = typeof process !== 'undefined' && process.versions != null && process.versions.node != null | ||
| if (isNodeJs) { | ||
| return (eval('require')('node:crypto').webcrypto); | ||
| } else { | ||
| return (window ? (window.crypto ? window.crypto : window.msCrypto) : self.crypto); | ||
| } | ||
| """ | ||
| ).unsafeCast<Crypto>() | ||
| } | ||
|
|
||
| // language=JavaScript | ||
| fun createAesCbcParams(iv: Uint8Array): dynamic = | ||
| js("({ name: 'AES-CBC', iv: iv})") | ||
|
|
||
| // language=JavaScript | ||
| fun createAesCtrParams(atu8_iv: Uint8Array, length: Int): dynamic = | ||
| js("({ name: 'AES-CTR', counter: atu8_iv, length: length})") | ||
|
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||
|
|
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| suspend fun aes_key(atu8_key: Uint8Array, si_algo: String): CryptoKey { | ||
| val crypto = getCrypto() | ||
| val keyUsages = arrayOf("encrypt") | ||
| return crypto.subtle.importKey("raw", atu8_key, si_algo, false, keyUsages).await() | ||
| } | ||
|
|
||
| // perform AES-CBC | ||
| suspend fun aesCbc(d_key_cbc: CryptoKey, atu8_data: Uint8Array): Uint8Array { | ||
| val crypto = getCrypto() | ||
| val d_cipher = Uint8Array( | ||
| crypto.subtle.encrypt( | ||
| createAesCbcParams(ATU8_ZERO_BLOCK).unsafeCast<AesCbcParams>(), d_key_cbc, atu8_data | ||
| ).await(), 0, NB_AES_BLOCK | ||
| ) | ||
| return d_cipher | ||
| } | ||
|
|
||
| // perform AES-CTR | ||
| suspend fun aesCtr(d_key_ctr: CryptoKey, atu8_iv: Uint8Array, atu8_data: Uint8Array): Uint8Array { | ||
| val crypto = getCrypto() | ||
| val d_cipher: ArrayBuffer = crypto.subtle.encrypt( | ||
| createAesCtrParams(atu8_iv, NB_AES_BLOCK).unsafeCast<AesCtrParams>(), d_key_ctr, atu8_data | ||
| ).await() | ||
| return Uint8Array(d_cipher) | ||
| } | ||
|
|
||
|
|
||
| // pseudo-constant-time select | ||
| fun select(xbValue: Int, xbRif1: Int, xbRif0: Int): Int = ((xbValue - 1).inv() and xbRif1) or ((xbValue - 1) and xbRif0) | ||
|
|
||
| // double block value in-place | ||
| fun doubleBlock(atu8Block: Uint8Array) { | ||
| var xbCarry = 0 | ||
|
|
||
| for (ibEach in NB_AES_BLOCK - 1 downTo 0) { | ||
| val xbTmp = ((atu8Block[ibEach].toInt() and 0xff) ushr 7) and 0xff | ||
| atu8Block[ibEach] = (((atu8Block[ibEach].toInt() and 0xff) shl 1) or xbCarry).toByte() | ||
| xbCarry = xbTmp | ||
| } | ||
|
|
||
| atu8Block[NB_AES_BLOCK - 1] = ((atu8Block[NB_AES_BLOCK - 1].toInt() and 0xff) xor select(xbCarry, 0x87, 0)).toByte() | ||
| @Suppress("UNUSED_VALUE") | ||
| xbCarry = 0 | ||
| } | ||
|
|
||
| fun xorBuffers(atu8A: Uint8Array, atu8B: Uint8Array) { | ||
| for (ibEach in 0 until atu8B.length) { | ||
| atu8A[ibEach] = (atu8A[ibEach].toInt() xor atu8B[ibEach].toInt()).toByte() | ||
| } | ||
| } | ||
|
|
||
| // Assuming aesCbc, doubleBlock, xorBuffers are defined similarly as suspend functions or adapted Kotlin/JS functions | ||
| suspend fun aesCmacInit(dKeyMac: CryptoKey): suspend (atu8_data: Uint8Array) -> Uint8Array { | ||
| // k1 subkey generation | ||
| val atu8K1 = aesCbc(dKeyMac, ATU8_ZERO_BLOCK) | ||
| doubleBlock(atu8K1) | ||
|
|
||
| // k2 subkey generation | ||
| val atu8K2 = Uint8Array(atu8K1.buffer.slice(0, atu8K1.length)) | ||
| doubleBlock(atu8K2) | ||
|
|
||
| // Return a suspend function for CMAC computation | ||
| return { atu8Data -> | ||
| // cache data byte count | ||
| val nbData = atu8Data.byteLength | ||
|
|
||
| // number of blocks needed | ||
| val nlBlocks = ceil(nbData.toDouble() / NB_AES_BLOCK.toDouble()).toInt() | ||
|
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| val atu8DataStart = if (nlBlocks == 0) 1 else nlBlocks | ||
|
|
||
| // last block | ||
| val atu8Last = Uint8Array(NB_AES_BLOCK) | ||
| atu8Last.set(atu8Data.subarray((atu8DataStart - 1) * NB_AES_BLOCK, atu8Data.length)) | ||
|
|
||
| // cache size of last block | ||
| val nbLast = nbData % NB_AES_BLOCK | ||
|
|
||
| // last block requires padding | ||
| if (nbLast > 0 || nlBlocks == 0) { | ||
| // M_last := {ANS} XOR K2 | ||
| xorBuffers(atu8Last, atu8K2) | ||
|
|
||
| // padding(M_n) | ||
| atu8Last[nbLast] = atu8Last[nbLast] xor 0x80.toByte() | ||
| } | ||
| // no padding needed; xor with k1 | ||
| else { | ||
| // M_last := M_n XOR K1 | ||
| xorBuffers(atu8Last, atu8K1) | ||
| } | ||
|
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| var atu8Block = ATU8_ZERO_BLOCK | ||
|
|
||
| // for i := 1 to n-1 | ||
| for (iBlock in 0 until nlBlocks - 1) { | ||
| // Y := X XOR M_i | ||
| xorBuffers(atu8Block, atu8Data.subarray(iBlock * NB_AES_BLOCK, atu8Data.length)) | ||
|
|
||
| // X := AES-128(K,Y) | ||
| atu8Block = aesCbc(dKeyMac, atu8Block) | ||
| } | ||
|
|
||
| // Y := M_last XOR X | ||
| xorBuffers(atu8Block, atu8Last) | ||
|
|
||
| // T := AES-128(K,Y) | ||
| aesCbc(dKeyMac, atu8Block) | ||
| } | ||
| } | ||
|
|
||
| // performs S2V operation | ||
| suspend fun s2v( | ||
| d_key_rkd: CryptoKey, atu8_plaintext: Uint8Array, a_ad: Array<Uint8Array> = arrayOf(Uint8Array(0)) | ||
| ): Uint8Array { | ||
| val f_cmac = aesCmacInit(d_key_rkd) | ||
|
|
||
| // D = AES-CMAC(K, <zero>) | ||
| var atu8_cmac = f_cmac(ATU8_ZERO_BLOCK) | ||
|
|
||
| // for i = 1 to n-1 | ||
| a_ad.forEach { atu8_ad -> | ||
| // dbl(D) | ||
| doubleBlock(atu8_cmac) | ||
|
|
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| // D = {ANS} xor AES-CMAC(K, Si) | ||
| xorBuffers(atu8_cmac, f_cmac(atu8_ad)) | ||
| } | ||
|
|
||
| // cache plaintext byte count | ||
| val nb_plaintext = atu8_plaintext.byteLength | ||
|
|
||
| // last block of plaintext | ||
| val atu8_sn = Uint8Array(NB_AES_BLOCK) | ||
|
|
||
| // if len(Sn) >= 128 | ||
| if (nb_plaintext >= NB_AES_BLOCK) { | ||
| // Sn_end xor D | ||
| atu8_sn.set(atu8_plaintext.subarray(nb_plaintext - NB_AES_BLOCK, atu8_plaintext.length)) | ||
| xorBuffers(atu8_sn, atu8_cmac) | ||
|
|
||
| // T = Sn xorend D | ||
| atu8_cmac = Uint8Array(atu8_plaintext.buffer.slice(0, atu8_plaintext.length)) | ||
| atu8_cmac.set(atu8_sn, nb_plaintext - NB_AES_BLOCK) | ||
| } else { | ||
| // dbl(D) | ||
| doubleBlock(atu8_cmac) | ||
|
|
||
| // pad(Sn) | ||
| atu8_sn.set(atu8_plaintext) | ||
| atu8_sn[nb_plaintext] = 0x80.toByte() | ||
|
|
||
| // T = dbl(D) xor pad(Sn) | ||
| xorBuffers(atu8_cmac, atu8_sn) | ||
| } | ||
|
|
||
| // V = AES-CMAC(K, T) | ||
| return f_cmac(atu8_cmac) | ||
| } |
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