types.d.ts

/**
 * KeyLike are runtime-specific classes representing asymmetric keys or symmetric secrets. These are
 * instances of {@link https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey CryptoKey} and
 * additionally {@link https://nodejs.org/api/crypto.html#class-keyobject KeyObject} in Node.js
 * runtime.
 * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array Uint8Array}
 * instances are also accepted as symmetric secret representation only.
 *
 * [Key Import Functions](../modules/key_import.md) can be used to import PEM, or JWK formatted
 * asymmetric keys and certificates to these runtime-specific representations.
 *
 * In Node.js the {@link https://nodejs.org/api/buffer.html#buffer Buffer} class is a subclass of
 * Uint8Array and so Buffer can be provided for symmetric secrets as well.
 *
 * {@link https://nodejs.org/api/crypto.html#class-keyobject KeyObject} is a representation of a
 * key/secret available in the Node.js runtime. In addition to the import functions of this library
 * you may use the runtime APIs
 * {@link https://nodejs.org/api/crypto.html#cryptocreatepublickeykey crypto.createPublicKey},
 * {@link https://nodejs.org/api/crypto.html#cryptocreateprivatekeykey crypto.createPrivateKey}, and
 * {@link https://nodejs.org/api/crypto.html#cryptocreatesecretkeykey-encoding crypto.createSecretKey}
 * to obtain a `KeyObject` from your existing key material.
 *
 * {@link https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey CryptoKey} is a representation
 * of a key/secret available in the Browser and Web-interoperable runtimes. In addition to the
 * import functions of this library you may use the
 * {@link https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/importKey SubtleCrypto.importKey}
 * API to obtain a CryptoKey from your existing key material.
 *
 */
export type KeyLike = { type: string }

/**
 * JSON Web Key ({@link https://www.rfc-editor.org/rfc/rfc7517 JWK}). "RSA", "EC", "OKP", and "oct"
 * key types are supported.
 */
export interface JWK {
  /** JWK "alg" (Algorithm) Parameter. */
  alg?: string
  crv?: string
  d?: string
  dp?: string
  dq?: string
  e?: string
  /** JWK "ext" (Extractable) Parameter. */
  ext?: boolean
  k?: string
  /** JWK "key_ops" (Key Operations) Parameter. */
  key_ops?: string[]
  /** JWK "kid" (Key ID) Parameter. */
  kid?: string
  /** JWK "kty" (Key Type) Parameter. */
  kty?: string
  n?: string
  oth?: Array<{
    d?: string
    r?: string
    t?: string
  }>
  p?: string
  q?: string
  qi?: string
  /** JWK "use" (Public Key Use) Parameter. */
  use?: string
  x?: string
  y?: string
  /** JWK "x5c" (X.509 Certificate Chain) Parameter. */
  x5c?: string[]
  /** JWK "x5t" (X.509 Certificate SHA-1 Thumbprint) Parameter. */
  x5t?: string
  /** "x5t#S256" (X.509 Certificate SHA-256 Thumbprint) Parameter. */
  'x5t#S256'?: string
  /** JWK "x5u" (X.509 URL) Parameter. */
  x5u?: string

  [propName: string]: unknown
}

/**
 * Generic Interface for consuming operations dynamic key resolution.
 *
 * @param IProtectedHeader Type definition of the JWE or JWS Protected Header.
 * @param IToken Type definition of the consumed JWE or JWS token.
 */
export interface GetKeyFunction<IProtectedHeader, IToken> {
  /**
   * Dynamic key resolution function. No token components have been verified at the time of this
   * function call.
   *
   * If you cannot match a key suitable for the token, throw an error instead.
   *
   * @param protectedHeader JWE or JWS Protected Header.
   * @param token The consumed JWE or JWS token.
   */
  (
    protectedHeader: IProtectedHeader,
    token: IToken,
  ): Promise<KeyLike | Uint8Array> | KeyLike | Uint8Array
}

/**
 * Flattened JWS definition for verify function inputs, allows payload as Uint8Array for detached
 * signature validation.
 */
export interface FlattenedJWSInput {
  /**
   * The "header" member MUST be present and contain the value JWS Unprotected Header when the JWS
   * Unprotected Header value is non- empty; otherwise, it MUST be absent. This value is represented
   * as an unencoded JSON object, rather than as a string. These Header Parameter values are not
   * integrity protected.
   */
  header?: JWSHeaderParameters

  /**
   * The "payload" member MUST be present and contain the value BASE64URL(JWS Payload). When RFC7797
   * "b64": false is used the value passed may also be a Uint8Array.
   */
  payload: string | Uint8Array

  /**
   * The "protected" member MUST be present and contain the value BASE64URL(UTF8(JWS Protected
   * Header)) when the JWS Protected Header value is non-empty; otherwise, it MUST be absent. These
   * Header Parameter values are integrity protected.
   */
  protected?: string

  /** The "signature" member MUST be present and contain the value BASE64URL(JWS Signature). */
  signature: string
}

/**
 * General JWS definition for verify function inputs, allows payload as Uint8Array for detached
 * signature validation.
 */
export interface GeneralJWSInput {
  /**
   * The "payload" member MUST be present and contain the value BASE64URL(JWS Payload). When when
   * JWS Unencoded Payload ({@link https://www.rfc-editor.org/rfc/rfc7797 RFC7797}) "b64": false is
   * used the value passed may also be a Uint8Array.
   */
  payload: string | Uint8Array

  /**
   * The "signatures" member value MUST be an array of JSON objects. Each object represents a
   * signature or MAC over the JWS Payload and the JWS Protected Header.
   */
  signatures: Omit<FlattenedJWSInput, 'payload'>[]
}

/**
 * Flattened JWS definition. Payload is returned as an empty string when JWS Unencoded Payload
 * ({@link https://www.rfc-editor.org/rfc/rfc7797 RFC7797}) is used.
 */
export interface FlattenedJWS extends Partial<FlattenedJWSInput> {
  payload: string
  signature: string
}

/**
 * General JWS definition. Payload is returned as an empty string when JWS Unencoded Payload
 * ({@link https://www.rfc-editor.org/rfc/rfc7797 RFC7797}) is used.
 */
export interface GeneralJWS {
  payload: string
  signatures: Omit<FlattenedJWSInput, 'payload'>[]
}

export interface JoseHeaderParameters {
  /** "kid" (Key ID) Header Parameter. */
  kid?: string

  /** "x5t" (X.509 Certificate SHA-1 Thumbprint) Header Parameter. */
  x5t?: string

  /** "x5c" (X.509 Certificate Chain) Header Parameter. */
  x5c?: string[]

  /** "x5u" (X.509 URL) Header Parameter. */
  x5u?: string

  /** "jku" (JWK Set URL) Header Parameter. */
  jku?: string

  /** "jwk" (JSON Web Key) Header Parameter. */
  jwk?: Pick<JWK, 'kty' | 'crv' | 'x' | 'y' | 'e' | 'n'>

  /** "typ" (Type) Header Parameter. */
  typ?: string

  /** "cty" (Content Type) Header Parameter. */
  cty?: string
}

/** Recognized JWS Header Parameters, any other Header Members may also be present. */
export interface JWSHeaderParameters extends JoseHeaderParameters {
  /** JWS "alg" (Algorithm) Header Parameter. */
  alg?: string

  /**
   * This JWS Extension Header Parameter modifies the JWS Payload representation and the JWS Signing
   * Input computation as per {@link https://www.rfc-editor.org/rfc/rfc7797 RFC7797}.
   */
  b64?: boolean

  /** JWS "crit" (Critical) Header Parameter. */
  crit?: string[]

  /** Any other JWS Header member. */
  [propName: string]: unknown
}

/** Recognized JWE Key Management-related Header Parameters. */
export interface JWEKeyManagementHeaderParameters {
  apu?: Uint8Array
  apv?: Uint8Array
  /**
   * @deprecated You should not use this parameter. It is only really intended for test and vector
   *   validation purposes.
   */
  p2c?: number
  /**
   * @deprecated You should not use this parameter. It is only really intended for test and vector
   *   validation purposes.
   */
  p2s?: Uint8Array
  /**
   * @deprecated You should not use this parameter. It is only really intended for test and vector
   *   validation purposes.
   */
  iv?: Uint8Array
  /**
   * @deprecated You should not use this parameter. It is only really intended for test and vector
   *   validation purposes.
   */
  epk?: KeyLike
}

/** Flattened JWE definition. */
export interface FlattenedJWE {
  /**
   * The "aad" member MUST be present and contain the value BASE64URL(JWE AAD)) when the JWE AAD
   * value is non-empty; otherwise, it MUST be absent. A JWE AAD value can be included to supply a
   * base64url-encoded value to be integrity protected but not encrypted.
   */
  aad?: string

  /** The "ciphertext" member MUST be present and contain the value BASE64URL(JWE Ciphertext). */
  ciphertext: string

  /**
   * The "encrypted_key" member MUST be present and contain the value BASE64URL(JWE Encrypted Key)
   * when the JWE Encrypted Key value is non-empty; otherwise, it MUST be absent.
   */
  encrypted_key?: string

  /**
   * The "header" member MUST be present and contain the value JWE Per- Recipient Unprotected Header
   * when the JWE Per-Recipient Unprotected Header value is non-empty; otherwise, it MUST be absent.
   * This value is represented as an unencoded JSON object, rather than as a string. These Header
   * Parameter values are not integrity protected.
   */
  header?: JWEHeaderParameters

  /**
   * The "iv" member MUST be present and contain the value BASE64URL(JWE Initialization Vector) when
   * the JWE Initialization Vector value is non-empty; otherwise, it MUST be absent.
   */
  iv?: string

  /**
   * The "protected" member MUST be present and contain the value BASE64URL(UTF8(JWE Protected
   * Header)) when the JWE Protected Header value is non-empty; otherwise, it MUST be absent. These
   * Header Parameter values are integrity protected.
   */
  protected?: string

  /**
   * The "tag" member MUST be present and contain the value BASE64URL(JWE Authentication Tag) when
   * the JWE Authentication Tag value is non-empty; otherwise, it MUST be absent.
   */
  tag?: string

  /**
   * The "unprotected" member MUST be present and contain the value JWE Shared Unprotected Header
   * when the JWE Shared Unprotected Header value is non-empty; otherwise, it MUST be absent. This
   * value is represented as an unencoded JSON object, rather than as a string. These Header
   * Parameter values are not integrity protected.
   */
  unprotected?: JWEHeaderParameters
}

export interface GeneralJWE extends Omit<FlattenedJWE, 'encrypted_key' | 'header'> {
  recipients: Pick<FlattenedJWE, 'encrypted_key' | 'header'>[]
}

/** Recognized JWE Header Parameters, any other Header members may also be present. */
export interface JWEHeaderParameters extends JoseHeaderParameters {
  /** JWE "alg" (Algorithm) Header Parameter. */
  alg?: string

  /** JWE "enc" (Encryption Algorithm) Header Parameter. */
  enc?: string

  /** JWE "crit" (Critical) Header Parameter. */
  crit?: string[]

  /**
   * JWE "zip" (Compression Algorithm) Header Parameter. This parameter is not supported anymore.
   *
   * @deprecated Compression of data SHOULD NOT be done before encryption, because such compressed
   *   data often reveals information about the plaintext.
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc8725#name-avoid-compression-of-encryp Avoid Compression of Encryption Inputs}
   */
  zip?: string

  /** Any other JWE Header member. */
  [propName: string]: unknown
}

/** Shared Interface with a "crit" property for all sign, verify, encrypt and decrypt operations. */
export interface CritOption {
  /**
   * An object with keys representing recognized "crit" (Critical) Header Parameter names. The value
   * for those is either `true` or `false`. `true` when the Header Parameter MUST be integrity
   * protected, `false` when it's irrelevant.
   *
   * This makes the "Extension Header Parameter "..." is not recognized" error go away.
   *
   * Use this when a given JWS/JWT/JWE profile requires the use of proprietary non-registered "crit"
   * (Critical) Header Parameters. This will only make sure the Header Parameter is syntactically
   * correct when provided and that it is optionally integrity protected. It will not process the
   * Header Parameter in any way or reject the operation if it is missing. You MUST still verify the
   * Header Parameter was present and process it according to the profile's validation steps after
   * the operation succeeds.
   *
   * The JWS extension Header Parameter `b64` is always recognized and processed properly. No other
   * registered Header Parameters that need this kind of default built-in treatment are currently
   * available.
   */
  crit?: {
    [propName: string]: boolean
  }
}

/** JWE Decryption options. */
export interface DecryptOptions extends CritOption {
  /**
   * A list of accepted JWE "alg" (Algorithm) Header Parameter values. By default all "alg"
   * (Algorithm) Header Parameter values applicable for the used key/secret are allowed except for
   * all PBES2 Key Management Algorithms, these need to be explicitly allowed using this option.
   */
  keyManagementAlgorithms?: string[]

  /**
   * A list of accepted JWE "enc" (Encryption Algorithm) Header Parameter values. By default all
   * "enc" (Encryption Algorithm) values applicable for the used key/secret are allowed.
   */
  contentEncryptionAlgorithms?: string[]

  /**
   * (PBES2 Key Management Algorithms only) Maximum allowed "p2c" (PBES2 Count) Header Parameter
   * value. The PBKDF2 iteration count defines the algorithm's computational expense. By default
   * this value is set to 10000.
   */
  maxPBES2Count?: number
}

/** JWE Encryption options. */
export interface EncryptOptions extends CritOption {}

/** JWT Claims Set verification options. */
export interface JWTClaimVerificationOptions {
  /** Expected JWT "aud" (Audience) Claim value(s). */
  audience?: string | string[]

  /**
   * Expected clock tolerance
   *
   * - In seconds when number (e.g. 5)
   * - Parsed as seconds when a string (e.g. "5 seconds", "10 minutes", "2 hours").
   */
  clockTolerance?: string | number

  /** Expected JWT "iss" (Issuer) Claim value(s). */
  issuer?: string | string[]

  /**
   * Maximum time elapsed (in seconds) from the JWT "iat" (Issued At) Claim value.
   *
   * - In seconds when number (e.g. 5)
   * - Parsed as seconds when a string (e.g. "5 seconds", "10 minutes", "2 hours").
   */
  maxTokenAge?: string | number

  /** Expected JWT "sub" (Subject) Claim value. */
  subject?: string

  /** Expected JWT "typ" (Type) Header Parameter value. */
  typ?: string

  /** Date to use when comparing NumericDate claims, defaults to `new Date()`. */
  currentDate?: Date

  /**
   * Array of required Claim Names that must be present in the JWT Claims Set. Default is that: if
   * the {@link JWTClaimVerificationOptions.issuer issuer option} is set, then "iss" must be present;
   * if the {@link JWTClaimVerificationOptions.audience audience option} is set, then "aud" must be
   * present; if the {@link JWTClaimVerificationOptions.subject subject option} is set, then "sub"
   * must be present; if the {@link JWTClaimVerificationOptions.maxTokenAge maxTokenAge option} is
   * set, then "iat" must be present.
   */
  requiredClaims?: string[]
}

/** JWS Verification options. */
export interface VerifyOptions extends CritOption {
  /**
   * A list of accepted JWS "alg" (Algorithm) Header Parameter values. By default all "alg"
   * (Algorithm) values applicable for the used key/secret are allowed. Note: "none" is never
   * accepted.
   */
  algorithms?: string[]
}

/** JWS Signing options. */
export interface SignOptions extends CritOption {}

/** Recognized JWT Claims Set members, any other members may also be present. */
export interface JWTPayload {
  /**
   * JWT Issuer
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.1 RFC7519#section-4.1.1}
   */
  iss?: string

  /**
   * JWT Subject
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.2 RFC7519#section-4.1.2}
   */
  sub?: string

  /**
   * JWT Audience
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.3 RFC7519#section-4.1.3}
   */
  aud?: string | string[]

  /**
   * JWT ID
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.7 RFC7519#section-4.1.7}
   */
  jti?: string

  /**
   * JWT Not Before
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.5 RFC7519#section-4.1.5}
   */
  nbf?: number

  /**
   * JWT Expiration Time
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.4 RFC7519#section-4.1.4}
   */
  exp?: number

  /**
   * JWT Issued At
   *
   * @see {@link https://www.rfc-editor.org/rfc/rfc7519#section-4.1.6 RFC7519#section-4.1.6}
   */
  iat?: number

  /** Any other JWT Claim Set member. */
  [propName: string]: unknown
}

export interface FlattenedDecryptResult {
  /** JWE AAD. */
  additionalAuthenticatedData?: Uint8Array

  /** Plaintext. */
  plaintext: Uint8Array

  /** JWE Protected Header. */
  protectedHeader?: JWEHeaderParameters

  /** JWE Shared Unprotected Header. */
  sharedUnprotectedHeader?: JWEHeaderParameters

  /** JWE Per-Recipient Unprotected Header. */
  unprotectedHeader?: JWEHeaderParameters
}

export interface GeneralDecryptResult extends FlattenedDecryptResult {}

export interface CompactDecryptResult {
  /** Plaintext. */
  plaintext: Uint8Array

  /** JWE Protected Header. */
  protectedHeader: CompactJWEHeaderParameters
}

export interface FlattenedVerifyResult {
  /** JWS Payload. */
  payload: Uint8Array

  /** JWS Protected Header. */
  protectedHeader?: JWSHeaderParameters

  /** JWS Unprotected Header. */
  unprotectedHeader?: JWSHeaderParameters
}

export interface GeneralVerifyResult extends FlattenedVerifyResult {}

export interface CompactVerifyResult {
  /** JWS Payload. */
  payload: Uint8Array

  /** JWS Protected Header. */
  protectedHeader: CompactJWSHeaderParameters
}

export interface JWTVerifyResult<PayloadType = JWTPayload> {
  /** JWT Claims Set. */
  payload: PayloadType & JWTPayload

  /** JWS Protected Header. */
  protectedHeader: JWTHeaderParameters
}

export interface JWTDecryptResult<PayloadType = JWTPayload> {
  /** JWT Claims Set. */
  payload: PayloadType & JWTPayload

  /** JWE Protected Header. */
  protectedHeader: CompactJWEHeaderParameters
}

export interface ResolvedKey<KeyLikeType extends KeyLike = KeyLike> {
  /** Key resolved from the key resolver function. */
  key: KeyLikeType | Uint8Array
}

/** Recognized Compact JWS Header Parameters, any other Header Members may also be present. */
export interface CompactJWSHeaderParameters extends JWSHeaderParameters {
  alg: string
}

/** Recognized Signed JWT Header Parameters, any other Header Members may also be present. */
export interface JWTHeaderParameters extends CompactJWSHeaderParameters {
  b64?: true
}

/** Recognized Compact JWE Header Parameters, any other Header Members may also be present. */
export interface CompactJWEHeaderParameters extends JWEHeaderParameters {
  alg: string
  enc: string
}

/** JSON Web Key Set */
export interface JSONWebKeySet {
  keys: JWK[]
}

export type CryptoRuntime = 'WebCryptoAPI' | 'node:crypto'