/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsDigestAuth_h__

#define nsDigestAuth_h__

#include "nsIHttpAuthenticator.h"

#include "nsStringFwd.h"

#include "nsCOMPtr.h"

#include "mozilla/Attributes.h"

class nsICryptoHash;

namespace mozilla { namespace net {

#define ALGO_SPECIFIED 0x01

#define ALGO_MD5 0x02

#define ALGO_MD5_SESS 0x04

#define QOP_AUTH 0x01

#define QOP_AUTH_INT 0x02

#define DIGEST_LENGTH 16

#define EXPANDED_DIGEST_LENGTH 32

#define NONCE_COUNT_LENGTH 8

//-----------------------------------------------------------------------------

// nsHttpDigestAuth

//-----------------------------------------------------------------------------

class nsHttpDigestAuth final : public nsIHttpAuthenticator

{

  public:

    NS_DECL_ISUPPORTS

    NS_DECL_NSIHTTPAUTHENTICATOR

    nsHttpDigestAuth() = default;

  protected:

    ~nsHttpDigestAuth() = default;

    MOZ_MUST_USE nsresult ExpandToHex(const char * digest, char * result);

    MOZ_MUST_USE nsresult CalculateResponse(const char * ha1_digest,

                                            const char * ha2_digest,

                                            const nsCString&  nonce,

                                            uint16_t qop,

                                            const char * nonce_count,

                                            const nsCString&  cnonce,

                                            char * result);

    MOZ_MUST_USE nsresult CalculateHA1(const nsCString& username,

                                       const nsCString& password,

                                       const nsCString& realm,

                                       uint16_t algorithm,

                                       const nsCString& nonce,

                                       const nsCString& cnonce,

                                       char * result);

    MOZ_MUST_USE nsresult CalculateHA2(const nsCString& http_method,

                                       const nsCString& http_uri_path,

                                       uint16_t qop,

                                       const char * body_digest,

                                       char * result);

    MOZ_MUST_USE nsresult ParseChallenge(const char * challenge,

                                         nsACString & realm,

                                         nsACString & domain,

                                         nsACString & nonce,

                                         nsACString & opaque,

                                         bool * stale,

                                         uint16_t * algorithm,

                                         uint16_t * qop);

    // result is in mHashBuf

    MOZ_MUST_USE nsresult MD5Hash(const char *buf, uint32_t len);

    MOZ_MUST_USE nsresult GetMethodAndPath(nsIHttpAuthenticableChannel *,

                                           bool, nsCString &, nsCString &);

    // append the quoted version of value to aHeaderLine

    MOZ_MUST_USE nsresult AppendQuotedString(const nsACString & value,

                                             nsACString & aHeaderLine);

  protected:

    nsCOMPtr<nsICryptoHash>        mVerifier;

    char                           mHashBuf[DIGEST_LENGTH];

};

} // namespace net

} // namespace mozilla

#endif // nsHttpDigestAuth_h__