multipaz-android-legacy/com.android.identity.android.legacy/Crypto

Crypto

object Crypto

Cryptographic support routines.

This object contains various cryptographic primitives and is a wrapper to a platform- specific crypto library.

For post-quantum cryptography algorithms (ML-DSA and ML-KEM) to work on the JVM or Android, the bcprov package (org.bouncycastle:bcprov-jdk18on) must be present on the classpath. It is consumed via reflection to avoid pulling in a large dependency into the core SDK.

Properties

val provider: String

supportedCurves

val supportedCurves: Set<EcCurve>

Functions

fun checkSignature(publicKey: EcPublicKey, message: ByteArray, algorithm: Algorithm, signature: EcSignature)

Checks signature validity.

createEcPrivateKey

fun createEcPrivateKey(curve: EcCurve): EcPrivateKey

Creates an EC private key.

fun decrypt(algorithm: Algorithm, key: ByteArray, nonce: ByteArray, messageCiphertext: ByteArray, aad: ByteArray? = null): ByteArray

Message decryption.

fun digest(algorithm: Algorithm, message: ByteArray): ByteArray

Message digest function.

fun encrypt(algorithm: Algorithm, key: ByteArray, nonce: ByteArray, messagePlaintext: ByteArray, aad: ByteArray? = null): ByteArray

Message encryption.

fun keyAgreement(key: EcPrivateKey, otherKey: EcPublicKey): ByteArray

Performs Key Agreement.

fun mac(algorithm: Algorithm, key: ByteArray, message: ByteArray): ByteArray

Message authentication code function.

fun sign(key: EcPrivateKey, signatureAlgorithm: Algorithm, message: ByteArray): EcSignature

Signs data with a key.