Package org.symbol.sdk.nem

Class SharedKey

java.lang.Object

org.symbol.sdk.nem.SharedKey

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public final class SharedKey extends Object

SharedKey

NEM shared-key derivation entry point. Uses HKDF-SHA-256 with the "nem-nis1" info tag and the NEM (Keccak-512) hash mode; private key bytes are reversed before being passed to the derivation.

• Method Summary

  All MethodsStatic MethodsConcrete Methods

  Modifier and Type

  Method

  Description

  static CryptoTypes.SharedKey256

  deriveSharedKey(KeyPair keyPair, CryptoTypes.PublicKey otherPublicKey)

  Derives a shared key from a key pair and the other party's public key.

  static CryptoTypes.SharedKey256

  deriveSharedKeyDeprecated(KeyPair keyPair, CryptoTypes.PublicKey otherPublicKey, byte[] salt)

  Derives a shared key using the legacy NEM scheme; provided only for compatibility with messages encrypted by original NEM wallets — new code should use deriveSharedKey(KeyPair, CryptoTypes.PublicKey).

  Methods inherited from class java.lang.Object

  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Method Details

  • deriveSharedKey

    public static CryptoTypes.SharedKey256 deriveSharedKey(KeyPair keyPair, CryptoTypes.PublicKey otherPublicKey)

    SharedKey.deriveSharedKey

    Derives a shared key from a key pair and the other party's public key.

    Parameters:

    keyPair - Key pair.

    otherPublicKey - Other party's public key.

    Returns:

    Shared encryption key.

  • deriveSharedKeyDeprecated

    public static CryptoTypes.SharedKey256 deriveSharedKeyDeprecated(KeyPair keyPair, CryptoTypes.PublicKey otherPublicKey, byte[] salt)

    SharedKey.deriveSharedKeyDeprecated

    Derives a shared key using the legacy NEM scheme; provided only for compatibility with messages encrypted by original NEM wallets — new code should use deriveSharedKey(KeyPair, CryptoTypes.PublicKey).

    Parameters:

    keyPair - Key pair.

    otherPublicKey - Other party's public key.

    salt - Random salt; should be unique per use. Must be 32 bytes long.

    Returns:

    Shared encryption key.