Package com.nimbusds.jose.jwk

Class JWK

java.lang.Object
com.nimbusds.jose.jwk.JWK
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
ECKey, OctetKeyPair, OctetSequenceKey, RSAKey
public abstract class JWK extends Object implements Serializable
The base abstract class for JSON Web Keys (JWKs). It serialises to a JSON object.

The following JSON object members are common to all JWK types:

Example JWK (of the Elliptic Curve type): 

 {
   "kty" : "EC",
   "crv" : "P-256",
   "x"   : "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
   "y"   : "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
   "use" : "enc",
   "kid" : "1"
 }
Version:
2022-12-26
Author:
Vladimir Dzhuvinov, Justin Richer, Stefan Larsson
See Also:

  • Field Details

  • Constructor Details

    • JWK

      @Deprecated protected JWK(KeyType kty, KeyUse use, Set<KeyOperation> ops, Algorithm alg, String kid, URI x5u, Base64URL x5t, Base64URL x5t256, List<Base64> x5c, KeyStore ks)
      Deprecated.
      Creates a new JSON Web Key (JWK).
      Parameters:
      kty - The key type. Must not be null.
      use - The key use, null if not specified or if the key is intended for signing as well as encryption.
      ops - The key operations, null if not specified.
      alg - The intended JOSE algorithm for the key, null if not specified.
      kid - The key ID, null if not specified.
      x5u - The X.509 certificate URL, null if not specified.
      x5t - The X.509 certificate thumbprint, null if not specified.
      x5t256 - The X.509 certificate SHA-256 thumbprint, null if not specified.
      x5c - The X.509 certificate chain, null if not specified.
      ks - Reference to the underlying key store, null if none.

    • JWK

      protected JWK(KeyType kty, KeyUse use, Set<KeyOperation> ops, Algorithm alg, String kid, URI x5u, Base64URL x5t, Base64URL x5t256, List<Base64> x5c, Date exp, Date nbf, Date iat, KeyStore ks)
      Creates a new JSON Web Key (JWK).
      Parameters:
      kty - The key type. Must not be null.
      use - The key use, null if not specified or if the key is intended for signing as well as encryption.
      ops - The key operations, null if not specified.
      alg - The intended JOSE algorithm for the key, null if not specified.
      kid - The key ID, null if not specified.
      x5u - The X.509 certificate URL, null if not specified.
      x5t - The X.509 certificate thumbprint, null if not specified.
      x5t256 - The X.509 certificate SHA-256 thumbprint, null if not specified.
      x5c - The X.509 certificate chain, null if not specified.
      exp - The key expiration time, null if not specified.
      nbf - The key not-before time, null if not specified.
      iat - The key issued-at time, null if not specified.
      ks - Reference to the underlying key store, null if none.

  • Method Details

    • getKeyType

      public KeyType getKeyType()
      Gets the type (kty) of this JWK.
      Returns:
      The key type.

    • getKeyUse

      public KeyUse getKeyUse()
      Gets the use (use) of this JWK.
      Returns:
      The key use, null if not specified or if the key is intended for signing as well as encryption.

    • getKeyOperations

      public Set<KeyOperation> getKeyOperations()
      Gets the operations (key_ops) for this JWK.
      Returns:
      The key operations, null if not specified.

    • getAlgorithm

      public Algorithm getAlgorithm()
      Gets the intended JOSE algorithm (alg) for this JWK.
      Returns:
      The intended JOSE algorithm, null if not specified.

    • getKeyID

      public String getKeyID()
      Gets the ID (kid) of this JWK. The key ID can be used to match a specific key. This can be used, for instance, to choose a key within a JWKSet during key rollover. The key ID may also correspond to a JWS/JWE kid header parameter value.
      Returns:
      The key ID, null if not specified.

    • getX509CertURL

      public URI getX509CertURL()
      Gets the X.509 certificate URL (x5u) of this JWK.
      Returns:
      The X.509 certificate URL, null if not specified.

    • getX509CertThumbprint

      @Deprecated public Base64URL getX509CertThumbprint()
      Deprecated.
      Gets the X.509 certificate SHA-1 thumbprint (x5t) of this JWK.
      Returns:
      The X.509 certificate SHA-1 thumbprint, null if not specified.

    • getX509CertSHA256Thumbprint

      public Base64URL getX509CertSHA256Thumbprint()
      Gets the X.509 certificate SHA-256 thumbprint (x5t#S256) of this JWK.
      Returns:
      The X.509 certificate SHA-256 thumbprint, null if not specified.

    • getX509CertChain

      public List<Base64> getX509CertChain()
      Gets the X.509 certificate chain (x5c) of this JWK.
      Returns:
      The X.509 certificate chain as a unmodifiable list, null if not specified.

    • getParsedX509CertChain

      public List<X509Certificate> getParsedX509CertChain()
      Gets the parsed X.509 certificate chain (x5c) of this JWK.
      Returns:
      The X.509 certificate chain as a unmodifiable list, null if not specified.

    • getExpirationTime

      public Date getExpirationTime()
      Gets the expiration time (exp) if this JWK.
      Returns:
      The expiration time, null if not specified.

    • getNotBeforeTime

      public Date getNotBeforeTime()
      Gets the not-before (nbf) of this JWK.
      Returns:
      The not-before time, null if not specified.

    • getIssueTime

      public Date getIssueTime()
      Gets the issued-at (iat) time of this JWK.
      Returns:
      The issued-at time, null if not specified.

    • getKeyStore

      public KeyStore getKeyStore()
      Returns a reference to the underlying key store.
      Returns:
      The underlying key store, null if none.

    • getRequiredParams

      public abstract LinkedHashMap<String,?> getRequiredParams()
      Returns the required JWK parameters. Intended as input for JWK thumbprint computation. See RFC 7638 for more information.
      Returns:
      The required JWK parameters, sorted alphanumerically by key name and ready for JSON serialisation.

    • computeThumbprint

      public Base64URL computeThumbprint() throws JOSEException
      Computes the SHA-256 thumbprint of this JWK. See RFC 7638 for more information.
      Returns:
      The SHA-256 thumbprint.
      Throws:
      JOSEException - If the SHA-256 hash algorithm is not supported.

    • computeThumbprint

      public Base64URL computeThumbprint(String hashAlg) throws JOSEException
      Computes the thumbprint of this JWK using the specified hash algorithm. See RFC 7638 for more information.
      Parameters:
      hashAlg - The hash algorithm. Must not be null.
      Returns:
      The SHA-256 thumbprint.
      Throws:
      JOSEException - If the hash algorithm is not supported.

    • computeThumbprintURI

      public ThumbprintURI computeThumbprintURI() throws JOSEException
      Computes the SHA-256 thumbprint URI of this JWK. See RFC 7638 and draft-ietf-oauth-jwk-thumbprint-uri for more information.
      Returns:
      The SHA-256 thumbprint URI.
      Throws:
      JOSEException - If the SHA-256 hash algorithm is not supported.

    • isPrivate

      public abstract boolean isPrivate()
      Returns true if this JWK contains private or sensitive (non-public) parameters.
      Returns:
      true if this JWK contains private parameters, else false.

    • toPublicJWK

      public abstract JWK toPublicJWK()
      Creates a copy of this JWK with all private or sensitive parameters removed.
      Returns:
      The newly created public JWK, or null if none can be created.

    • size

      public abstract int size()
      Returns the size of this JWK.
      Returns:
      The JWK size, in bits.

    • toRSAKey

      public RSAKey toRSAKey()
      Casts this JWK to an RSA JWK.
      Returns:
      The RSA JWK.

    • toECKey

      public ECKey toECKey()
      Casts this JWK to an EC JWK.
      Returns:
      The EC JWK.

    • toOctetSequenceKey

      public OctetSequenceKey toOctetSequenceKey()
      Casts this JWK to an octet sequence JWK.
      Returns:
      The octet sequence JWK.

    • toOctetKeyPair

      public OctetKeyPair toOctetKeyPair()
      Casts this JWK to an octet key pair JWK.
      Returns:
      The octet key pair JWK.

    • toJSONObject

      public Map<String,Object> toJSONObject()
      Returns a JSON object representation of this JWK. This method is intended to be called from extending classes.

      Example: 

       {
   "kty" : "RSA",
   "use" : "sig",
   "kid" : "fd28e025-8d24-48bc-a51a-e2ffc8bc274b"
 }
      Returns:
      The JSON object representation.

    • toJSONString

      public String toJSONString()
      Returns the JSON object string representation of this JWK.
      Returns:
      The JSON object string representation.

    • toString

      public String toString()
      Overrides:
      toString in class Object
      See Also:

    • parse

      public static JWK parse(String s) throws ParseException
      Parses a JWK from the specified JSON object string representation. The JWK must be an ECKey, an RSAKey, or a OctetSequenceKey.
      Parameters:
      s - The JSON object string to parse. Must not be null.
      Returns:
      The JWK.
      Throws:
      ParseException - If the string couldn't be parsed to a supported JWK.

    • parse

      public static JWK parse(Map<String,Object> jsonObject) throws ParseException
      Parses a JWK from the specified JSON object representation. The JWK must be an ECKey, an RSAKey, or a OctetSequenceKey.
      Parameters:
      jsonObject - The JSON object to parse. Must not be null.
      Returns:
      The JWK.
      Throws:
      ParseException - If the JSON object couldn't be parsed to a supported JWK.

    • parse

      public static JWK parse(X509Certificate cert) throws JOSEException
      Parses a public RSA or EC JWK from the specified X.509 certificate. Requires BouncyCastle.

      Important: The X.509 certificate is not validated!

      Sets the following JWK parameters:

      • For an EC key the curve is obtained from the subject public key info algorithm parameters.
      • The JWK use inferred by KeyUse.from(java.security.cert.X509Certificate).
      • The JWK ID from the X.509 serial number (in base 10).
      • The JWK X.509 certificate chain (this certificate only).
      • The JWK X.509 certificate SHA-256 thumbprint.
      Parameters:
      cert - The X.509 certificate. Must not be null.
      Returns:
      The public RSA or EC JWK.
      Throws:
      JOSEException - If parsing failed.

    • parseFromPEMEncodedX509Cert

      public static JWK parseFromPEMEncodedX509Cert(String pemEncodedCert) throws JOSEException
      Parses a public RSA or EC JWK from the specified PEM-encoded X.509 certificate. Requires BouncyCastle.

      Important: The X.509 certificate is not validated!

      Sets the following JWK parameters:

      • For an EC key the curve is obtained from the subject public key info algorithm parameters.
      • The JWK use inferred by KeyUse.from(java.security.cert.X509Certificate).
      • The JWK ID from the X.509 serial number (in base 10).
      • The JWK X.509 certificate chain (this certificate only).
      • The JWK X.509 certificate SHA-256 thumbprint.
      Parameters:
      pemEncodedCert - The PEM-encoded X.509 certificate. Must not be null.
      Returns:
      The public RSA or EC JWK.
      Throws:
      JOSEException - If parsing failed.

    • load

      public static JWK load(KeyStore keyStore, String alias, char[] pin) throws KeyStoreException, JOSEException
      Loads a JWK from the specified JCE key store. The JWK can be a public / private RSA key, a public / private EC key, or a secret key. Requires BouncyCastle.

      Important: The X.509 certificate is not validated!

      Parameters:
      keyStore - The key store. Must not be null.
      alias - The alias. Must not be null.
      pin - The pin to unlock the private key if any, empty or null if not required.
      Returns:
      The public / private RSA or EC JWK, or secret JWK, or null if no key with the specified alias was found.
      Throws:
      KeyStoreException - On a key store exception.
      JOSEException - If RSA or EC key loading failed.

    • parseFromPEMEncodedObjects

      public static JWK parseFromPEMEncodedObjects(String pemEncodedObjects) throws JOSEException
      Parses an RSA or EC JWK from the specified string of one or more PEM-encoded object(s):
      • X.509 certificate (PEM header: BEGIN CERTIFICATE)
      • PKCS#1 RSAPublicKey (PEM header: BEGIN RSA PUBLIC KEY)
      • X.509 SubjectPublicKeyInfo (PEM header: BEGIN PUBLIC KEY)
      • PKCS#1 RSAPrivateKey (PEM header: BEGIN RSA PRIVATE KEY)
      • PKCS#8 PrivateKeyInfo (PEM header: BEGIN PRIVATE KEY)
      • matching pair of the above

      Requires BouncyCastle.

      Parameters:
      pemEncodedObjects - The string of PEM-encoded object(s).
      Returns:
      The public / (private) RSA or EC JWK.
      Throws:
      JOSEException - If RSA or EC key parsing failed.

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object