Package org.keycloak.util

Class DIDUtils

java.lang.Object

org.keycloak.util.DIDUtils

public final class DIDUtils
extends Object

Utility methods for DID encoding/decoding, specifically did:key for P-256 (ES256).

Provides: - EC → did:key:z... encoding (multibase + multicodec + base58btc) - did:key → EC public key decoding - multicodec varint encode/decode - EC point normalization

Author:

Thomas Diesler

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MULTICODEC_JWK_JCS_PUB
static final int	MULTICODEC_P256_PUB	Multicodec identifier for P-256 public keys.
static final int	MULTICODEC_P384_PUB
static final int	MULTICODEC_P521_PUB

Method Summary

Modifier and Type	Method	Description
static ECPublicKey	decodeDidKey(String did)	Decode a did:key (P-256) into an ECPublicKey.
static String	encodeDidKey(ECPublicKey pub)	Encode a ECPublicKey (P-256) into a did:key representation.
static int	getDidKeyCodec(String did)

Methods inherited from class java.lang.Object

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

Field Details

MULTICODEC_P256_PUB

public static final int MULTICODEC_P256_PUB

Multicodec identifier for P-256 public keys. See: https://github.com/multiformats/multicodec/

Codec name: "p256-pub" Code: 0x1200 (varint-encoded into bytes: 0x80 0x24)

See Also:

• Constant Field Values

MULTICODEC_P384_PUB

public static final int MULTICODEC_P384_PUB

See Also:

• Constant Field Values

MULTICODEC_P521_PUB

public static final int MULTICODEC_P521_PUB

See Also:

• Constant Field Values

MULTICODEC_JWK_JCS_PUB

public static final int MULTICODEC_JWK_JCS_PUB

See Also:

• Constant Field Values

Method Details

encodeDidKey

public static String encodeDidKey(ECPublicKey pub)

Encode a ECPublicKey (P-256) into a did:key representation.

decodeDidKey

public static ECPublicKey decodeDidKey(String did)

Decode a did:key (P-256) into an ECPublicKey.

getDidKeyCodec

public static int getDidKeyCodec(String did)