// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.

/// <reference no-default-lib="true" />
/// <reference lib="esnext" />

declare var crypto: Crypto;

interface Algorithm {
  name: string;
}

interface KeyAlgorithm {
  name: string;
}

type AlgorithmIdentifier = string | Algorithm;
type HashAlgorithmIdentifier = AlgorithmIdentifier;
type KeyType = "private" | "public" | "secret";
type KeyUsage =
  | "decrypt"
  | "deriveBits"
  | "deriveKey"
  | "encrypt"
  | "sign"
  | "unwrapKey"
  | "verify"
  | "wrapKey";

type NamedCurve = string;

interface HmacKeyGenParams extends Algorithm {
  hash: HashAlgorithmIdentifier;
  length?: number;
}

interface EcKeyGenParams extends Algorithm {
  namedCurve: NamedCurve;
}

interface EcdsaParams extends Algorithm {
  hash: HashAlgorithmIdentifier;
}

interface RsaHashedKeyGenParams extends RsaKeyGenParams {
  hash: HashAlgorithmIdentifier;
}

interface RsaKeyGenParams extends Algorithm {
  modulusLength: number;
  publicExponent: Uint8Array;
}

interface RsaPssParams extends Algorithm {
  saltLength: number;
}

interface HmacImportParams extends Algorithm {
  hash: HashAlgorithmIdentifier;
  length?: number;
}

/** The CryptoKey dictionary of the Web Crypto API represents a cryptographic key. */
interface CryptoKey {
  readonly algorithm: KeyAlgorithm;
  readonly extractable: boolean;
  readonly type: KeyType;
  readonly usages: KeyUsage[];
}

declare var CryptoKey: {
  prototype: CryptoKey;
  new (): CryptoKey;
};

/** The CryptoKeyPair dictionary of the Web Crypto API represents a key pair for an asymmetric cryptography algorithm, also known as a public-key algorithm. */
interface CryptoKeyPair {
  privateKey: CryptoKey;
  publicKey: CryptoKey;
}

declare var CryptoKeyPair: {
  prototype: CryptoKeyPair;
  new (): CryptoKeyPair;
};

/** This Web Crypto API interface provides a number of low-level cryptographic functions. It is accessed via the Crypto.subtle properties available in a window context (via Window.crypto). */
interface SubtleCrypto {
  generateKey(
    algorithm: RsaHashedKeyGenParams | EcKeyGenParams,
    extractable: boolean,
    keyUsages: KeyUsage[],
  ): Promise<CryptoKeyPair>;
  generateKey(
    algorithm: HmacKeyGenParams,
    extractable: boolean,
    keyUsages: KeyUsage[],
  ): Promise<CryptoKey>;
  generateKey(
    algorithm: AlgorithmIdentifier,
    extractable: boolean,
    keyUsages: KeyUsage[],
  ): Promise<CryptoKeyPair | CryptoKey>;
  importKey(
    format: "raw",
    keyData: BufferSource,
    algorithm: AlgorithmIdentifier | HmacImportParams,
    extractable: boolean,
    keyUsages: KeyUsage[],
  ): Promise<CryptoKey>;
  sign(
    algorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParams,
    key: CryptoKey,
    data: BufferSource,
  ): Promise<ArrayBuffer>;
  verify(
    algorithm: AlgorithmIdentifier | RsaPssParams,
    key: CryptoKey,
    signature: BufferSource,
    data: BufferSource,
  ): Promise<boolean>;
  digest(
    algorithm: AlgorithmIdentifier,
    data: BufferSource,
  ): Promise<ArrayBuffer>;
}

declare interface Crypto {
  readonly subtle: SubtleCrypto;
  getRandomValues<
    T extends
      | Int8Array
      | Int16Array
      | Int32Array
      | Uint8Array
      | Uint16Array
      | Uint32Array
      | Uint8ClampedArray
      | Float32Array
      | Float64Array
      | DataView
      | null,
  >(
    array: T,
  ): T;
  randomUUID(): string;
}

interface Algorithm {
  name: string;
}

declare var SubtleCrypto: {
  prototype: SubtleCrypto;
  new (): SubtleCrypto;
};