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Fixed some of the errors spotted in various aes implementation while doing cryptopals challenge, anyways they were unused. Added multipart generic hash (blake2b) native implementation

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Ugljesa Jovanovic 2020-08-26 19:58:57 +02:00 committed by Ugljesa Jovanovic
parent 231a84af67
commit 6f38a01195
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GPG Key ID: 178E6DFCECCB0E0F
6 changed files with 88 additions and 11 deletions
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2
multiplatform-crypto-delegated/src/jsMain/kotlin/com/ionspin/kotlin/crypto/JsSodiumInterface.kt
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@ -50,7 +50,7 @@ interface JsSodiumInterface {
//decrypt
fun crypto_secretstream_xchacha20poly1305_init_pull(header: Uint8Array, key: Uint8Array) : dynamic
fun crypto_secretstream_xchacha20poly1305_pull(state: dynamic, ciphertext: Uint8Array, additionalData: Uint8Array) : Uint8Array
fun crypto_secretstream_xchacha20poly1305_pull(state: dynamic, ciphertext: Uint8Array, additionalData: Uint8Array) : dynamic
//util
fun memzero(array: Uint8Array)

16
multiplatform-crypto-libsodium-bindings/src/commonMain/kotlin/com.ionspin.kotlin.crypto/generichash/GenericHashing.kt
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@ -5,6 +5,22 @@ package com.ionspin.kotlin.crypto.generichash
* ugljesa.jovanovic@ionspin.com
* on 21-Aug-2020
*/
data class GenericHashState(val hashLength: Int, val state: GenericHashStateInternal)
expect class GenericHashStateInternal
expect object GenericHashing {
fun genericHash(message : UByteArray, requestedHashLength: Int, key : UByteArray? = null) : UByteArray
fun genericHashInit(requestedHashLength: Int, key : UByteArray? = null) : GenericHashState
fun genericHashUpdate(state: GenericHashState, messagePart : UByteArray)
fun genericHashFinal(state : GenericHashState) : UByteArray
}

57
multiplatform-crypto-libsodium-bindings/src/nativeMain/kotlin/com/ionspin/kotlin/crypto/generichash/GenericHashing.kt
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@ -3,17 +3,30 @@ package com.ionspin.kotlin.crypto.generichash
import kotlinx.cinterop.addressOf
import kotlinx.cinterop.convert
import kotlinx.cinterop.pin
import kotlinx.cinterop.pointed
import kotlinx.cinterop.ptr
import kotlinx.cinterop.reinterpret
import libsodium.crypto_generichash
import libsodium.crypto_generichash_final
import libsodium.crypto_generichash_init
import libsodium.crypto_generichash_state
import libsodium.crypto_generichash_update
import platform.posix.malloc
/**
* Created by Ugljesa Jovanovic
* ugljesa.jovanovic@ionspin.com
* on 21-Aug-2020
*/
actual typealias GenericHashStateInternal = libsodium.crypto_generichash_blake2b_state
actual object GenericHashing {
val _emitByte: Byte = 0
val _emitByteArray: ByteArray = ByteArray(0)
actual fun genericHash(message: UByteArray, requestedHashLength: Int, key: UByteArray?) : UByteArray {
val hash = UByteArray(requestedHashLength)
val pinnedHash = hash.pin()
@ -32,4 +45,48 @@ actual object GenericHashing {
pinnedMessage.unpin()
return hash
}
actual fun genericHashInit(
requestedHashLength: Int,
key: UByteArray?
): GenericHashState {
val stateAllocated = malloc(GenericHashStateInternal.size.convert())
val statePointed = stateAllocated!!.reinterpret<GenericHashStateInternal>().pointed
val pinnedKey = key?.pin()
crypto_generichash_init(
statePointed.ptr,
pinnedKey?.addressOf(0),
(key?.size ?: 0).convert(),
requestedHashLength.convert()
)
pinnedKey?.unpin()
return GenericHashState(requestedHashLength, statePointed)
}
actual fun genericHashUpdate(
state: GenericHashState,
messagePart: UByteArray
) {
val pinnedMessage = messagePart.pin()
crypto_generichash_update(
state.state.ptr,
pinnedMessage.addressOf(0),
messagePart.size.convert()
)
pinnedMessage.unpin()
}
actual fun genericHashFinal(state: GenericHashState): UByteArray {
val hashResult = UByteArray(state.hashLength)
val hashResultPinned = hashResult.pin()
crypto_generichash_final(
state.state.ptr,
hashResultPinned.addressOf(0),
state.hashLength.convert()
)
hashResultPinned.unpin()
return hashResult
}
}

10
multiplatform-crypto/src/commonMain/kotlin/com/ionspin/kotlin/crypto/symmetric/AesCbcPure.kt
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@ -145,7 +145,8 @@ internal class AesCbcPure internal constructor(val aesKey: InternalAesKey, val m
}
/**
* Encrypt fed data and return it alongside the randomly chosen initialization vector
* Encrypt fed data and return it alongside the randomly chosen initialization vector.
* This also applies correct PKCS#7 padding
* @return Encrypted data and initialization vector
*/
fun encrypt(): EncryptedDataAndInitializationVector {
@ -158,6 +159,8 @@ internal class AesCbcPure internal constructor(val aesKey: InternalAesKey, val m
} else {
output += consumeBlock(lastBlockPadded)
}
} else {
output += consumeBlock(UByteArray(BLOCK_BYTES) { BLOCK_BYTES.toUByte()})
}
return EncryptedDataAndInitializationVector(
output.reversed().foldRight(UByteArray(0) { 0U }) { arrayOfUBytes, acc -> acc + arrayOfUBytes },
@ -172,11 +175,10 @@ internal class AesCbcPure internal constructor(val aesKey: InternalAesKey, val m
fun decrypt(): UByteArray {
val removePaddingCount = output.last().last()
val removedPadding = if (removePaddingCount > 0U && removePaddingCount < 16U) {
output.last().dropLast(removePaddingCount.toInt() and 0x7F)
} else {
output.last().toList()
ubyteArrayOf()
}.toUByteArray()
val preparedOutput = (output.dropLast(1) + listOf(removedPadding))
//JS compiler freaks out here if we don't supply exact type
@ -238,4 +240,4 @@ data class EncryptedDataAndInitializationVector(val encryptedData : UByteArray,
result = 31 * result + initializationVector.contentHashCode()
return result
}
}
}

8
multiplatform-crypto/src/commonMain/kotlin/com/ionspin/kotlin/crypto/symmetric/AesCtrPure.kt
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@ -54,8 +54,8 @@ internal class AesCtrPure internal constructor(val aesKey: InternalAesKey, val m
* Creates and returns AesCtr instance that can be fed data using [addData]. Once you have submitted all
* data call [decrypt]
*/
fun createDecryptor(aesKey : InternalAesKey) : AesCtrPure {
return AesCtrPure(aesKey, Mode.DECRYPT)
fun createDecryptor(aesKey : InternalAesKey, initialCounter: UByteArray) : AesCtrPure {
return AesCtrPure(aesKey, Mode.DECRYPT, initialCounter = initialCounter)
}
/**
* Bulk encryption, returns encrypted data and a random initial counter
@ -68,8 +68,8 @@ internal class AesCtrPure internal constructor(val aesKey: InternalAesKey, val m
/**
* Bulk decryption, returns decrypted data
*/
fun decrypt(aesKey: InternalAesKey, data: UByteArray, initialCounter: UByteArray? = null): UByteArray {
val aesCtr = AesCtrPure(aesKey, Mode.DECRYPT, initialCounter)
fun decrypt(aesKey: InternalAesKey, data: UByteArray, initialCounter: UByteArray): UByteArray {
val aesCtr = AesCtrPure(aesKey, Mode.DECRYPT, initialCounter = initialCounter)
aesCtr.addData(data)
return aesCtr.decrypt()
}

6
multiplatform-crypto/src/commonTest/kotlin/com/ionspin/kotlin/crypto/symmetric/AesCbcTest.kt
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@ -35,7 +35,9 @@ class AesCbcTest {
val key = "4278b840fb44aaa757c1bf04acbe1a3e"
val iv = "57f02a5c5339daeb0a2908a06ac6393f"
val plaintext = "3c888bbbb1a8eb9f3e9b87acaad986c466e2f7071c83083b8a557971918850e5"
val expectedCipherText = "479c89ec14bc98994e62b2c705b5014e175bd7832e7e60a1e92aac568a861eb7"
val expectedCipherText = "479c89ec14bc98994e62b2c705b5014e" +
"175bd7832e7e60a1e92aac568a861eb7" +
"fc2dc2f4a527ce39f79c56b31432c779"
val aesCbc =
AesCbcPure(InternalAesKey.Aes128Key(key), mode = Mode.ENCRYPT, initializationVector = iv.hexStringToUByteArray())
aesCbc.addData(plaintext.hexStringToUByteArray())
@ -104,4 +106,4 @@ class AesCbcTest {
}
}