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Merge pull request #10 from a-sit-plus/feature/mdl-cbor-serializer-pu…
…blickeys Introduce generic structure for public keys
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21 changes: 0 additions & 21 deletions
21
vclib-openid/src/commonTest/kotlin/at/asitplus/wallet/lib/oidvci/OidvciProcessTest.kt
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122 changes: 122 additions & 0 deletions
122
vclib/src/commonMain/kotlin/at/asitplus/wallet/lib/CryptoPublicKey.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package at.asitplus.wallet.lib | ||
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| import at.asitplus.KmmResult | ||
| import at.asitplus.wallet.lib.cbor.CoseAlgorithm | ||
| import at.asitplus.wallet.lib.cbor.CoseEllipticCurve | ||
| import at.asitplus.wallet.lib.cbor.CoseKey | ||
| import at.asitplus.wallet.lib.cbor.CoseKeyType | ||
| import at.asitplus.wallet.lib.jws.EcCurve | ||
| import at.asitplus.wallet.lib.jws.JsonWebKey | ||
| import at.asitplus.wallet.lib.jws.JwkType | ||
| import at.asitplus.wallet.lib.jws.MultibaseHelper | ||
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| sealed class CryptoPublicKey { | ||
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| abstract fun toCoseKey(): CoseKey | ||
| abstract fun toJsonWebKey(): JsonWebKey | ||
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| data class Ec( | ||
| val curve: EcCurve, | ||
| val keyId: String, | ||
| val x: ByteArray, | ||
| val y: ByteArray, | ||
| ) : CryptoPublicKey() { | ||
| override fun equals(other: Any?): Boolean { | ||
| if (this === other) return true | ||
| if (other == null || this::class != other::class) return false | ||
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| other as Ec | ||
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| if (curve != other.curve) return false | ||
| if (keyId != other.keyId) return false | ||
| if (!x.contentEquals(other.x)) return false | ||
| if (!y.contentEquals(other.y)) return false | ||
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| return true | ||
| } | ||
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| override fun hashCode(): Int { | ||
| var result = curve.hashCode() | ||
| result = 31 * result + keyId.hashCode() | ||
| result = 31 * result + x.contentHashCode() | ||
| result = 31 * result + y.contentHashCode() | ||
| return result | ||
| } | ||
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| companion object { | ||
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| fun fromKeyId(it: String): CryptoPublicKey? { | ||
| val (xCoordinate, yCoordinate) = MultibaseHelper.calcPublicKey(it) | ||
| ?: return null | ||
| return CryptoPublicKey.Ec( | ||
| curve = EcCurve.SECP_256_R_1, | ||
| keyId = it, | ||
| x = xCoordinate, | ||
| y = yCoordinate | ||
| ) | ||
| } | ||
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| fun fromAnsiX963Bytes(curve: EcCurve, it: ByteArray): CryptoPublicKey? { | ||
| if (curve != EcCurve.SECP_256_R_1) { | ||
| return null | ||
| } | ||
| if (it.size != 1 + 32 + 32 || it[0] != 0x04.toByte()) { | ||
| return null | ||
| } | ||
| val xCoordinate = it.sliceArray(1 until 33) | ||
| val yCoordinate = it.sliceArray(33 until 65) | ||
| val keyId = MultibaseHelper.calcKeyId(curve, xCoordinate, yCoordinate) | ||
| ?: return null | ||
| return CryptoPublicKey.Ec( | ||
| curve = curve, | ||
| keyId = keyId, | ||
| x = xCoordinate, | ||
| y = yCoordinate | ||
| ) | ||
| } | ||
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| fun fromCoordinates(curve: EcCurve, x: ByteArray, y: ByteArray): CryptoPublicKey? { | ||
| if (curve != EcCurve.SECP_256_R_1) { | ||
| return null | ||
| } | ||
| val keyId = MultibaseHelper.calcKeyId(curve, x, y) | ||
| ?: return null | ||
| return CryptoPublicKey.Ec( | ||
| curve = curve, | ||
| keyId = keyId, | ||
| x = x, | ||
| y = y | ||
| ) | ||
| } | ||
| } | ||
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| fun toAnsiX963ByteArray(): KmmResult<ByteArray> { | ||
| return KmmResult.success(byteArrayOf(0x04.toByte()) + x + y); | ||
| } | ||
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| override fun toCoseKey() = CoseKey( | ||
| type = CoseKeyType.EC2, | ||
| curve = curve.toCoseCurve(), | ||
| keyId = keyId.encodeToByteArray(), | ||
| algorithm = CoseAlgorithm.ES256, | ||
| x = x, | ||
| y = y | ||
| ) | ||
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| override fun toJsonWebKey() = JsonWebKey( | ||
| curve = curve, | ||
| type = JwkType.EC, | ||
| keyId = keyId, | ||
| x = x, | ||
| y = y | ||
| ) | ||
| } | ||
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| } | ||
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| private fun EcCurve.toCoseCurve(): CoseEllipticCurve = when (this) { | ||
| EcCurve.SECP_256_R_1 -> CoseEllipticCurve.P256 | ||
| EcCurve.SECP_384_R_1 -> CoseEllipticCurve.P384 | ||
| EcCurve.SECP_521_R_1 -> CoseEllipticCurve.P521 | ||
| } |
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