diff options
Diffstat (limited to 'src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt')
-rw-r--r-- | src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt b/src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt index 98ee656..e6995b1 100644 --- a/src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt +++ b/src/commonMain/kotlin/net/taler/wallet/kotlin/crypto/CryptoImpl.kt @@ -1,7 +1,28 @@ package net.taler.wallet.kotlin.crypto +import net.taler.wallet.kotlin.crypto.CryptoImpl.Companion.toByteArray + abstract class CryptoImpl : Crypto { + companion object { + fun Int.toByteArray(): ByteArray { + val bytes = ByteArray(4) + bytes[3] = (this and 0xFFFF).toByte() + bytes[2] = ((this ushr 8) and 0xFFFF).toByte() + bytes[1] = ((this ushr 16) and 0xFFFF).toByte() + bytes[0] = ((this ushr 24) and 0xFFFF).toByte() + return bytes + } + + fun Long.toByteArray() = ByteArray(8).apply { + var l = this@toByteArray + for (i in 7 downTo 0) { + this[i] = (l and 0xFF).toByte() + l = l shr 8 + } + } + } + override fun kdf(outputLength: Int, ikm: ByteArray, salt: ByteArray, info: ByteArray): ByteArray { return Kdf.kdf(outputLength, ikm, salt, info, { sha256(it) }, { sha512(it) }) } @@ -15,13 +36,4 @@ abstract class CryptoImpl : Crypto { return FreshCoin(eddsaGetPublic(coinPrivateKey), coinPrivateKey, bks) } - private fun Int.toByteArray(): ByteArray { - val bytes = ByteArray(4) - bytes[3] = (this and 0xFFFF).toByte() - bytes[2] = ((this ushr 8) and 0xFFFF).toByte() - bytes[1] = ((this ushr 16) and 0xFFFF).toByte() - bytes[0] = ((this ushr 24) and 0xFFFF).toByte() - return bytes - } - } |