Attachment #8714628 for bug #41489

Attachment #8714628: to do here as draft-ietf-httpauth-digest for bug #41489

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++ /c/mozilla-release-8168af494649/netwerk/protocol/http/nsHttpBasicAuth.cpp201

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// HttpLog.h should generally be included first
#include "HttpLog.h"
#include "nsHttpBasicAuth.h"
#include "plbase64.h"
#include "nsString.h"
#include "mozilla/Tokenizer.h"
namespace mozilla {
namespace net {
//-----------------------------------------------------------------------------
// nsHttpBasicAuth <public>
//-----------------------------------------------------------------------------

    NS_ENSURE_ARG_POINTER(creds);
    *aFlags = 0;
    // we only know how to deal with Basic auth for http.
    bool isBasicAuth = !PL_strncasecmp(challenge, "basic", 5);
    NS_ENSURE_TRUE(isBasicAuth, NS_ERROR_UNEXPECTED);
    // we work with ASCII around here
    nsAutoCString userpass;
         nsAutoCString charset;
         Tokenizer p(challenge);
         Tokenizer::Token t;
         while (p.Next(t)) {
           if (t.AsString() == "charset" && p.Next(t) && (t.AsChar() == '=')) {
             p.Record();
             while (p.Next(t) && !t.Equals(Tokenizer::Token::Char(',')));
             p.Claim(charset);
                   charset.StripChar('"', 0);
           }
         }
    if (charset.EqualsLiteral("UTF-8")) {
      CopyUTF16toUTF8(user, userpass);
      userpass.Append(':');
           if (password) {
                   AppendUTF16toUTF8(password, userpass);
           }
         } else {
      /**
            *Actually it is ISO-8859-1(not ASCII)
       */
           LossyCopyUTF16toASCII(user, userpass);
      userpass.Append(':');
           if (password) {
                   LossyAppendUTF16toASCII(password, userpass);
           }
         }
    // plbase64.h provides this worst-case output buffer size calculation.
    // use calloc, since PL_Base64Encode does not null terminate.
    *creds = (char *) calloc(6 + ((userpass.Length() + 2)/3)*4 + 1, 1);
    if (!*creds)
        return NS_ERROR_OUT_OF_MEMORY;
    memcpy(*creds, "Basic ", 6);
++ /c/mozilla-release-8168af494649/netwerk/protocol/http/nsHttpDigestAuth.cpp20

NS_IMPL_ISUPPORTS(nsHttpDigestAuth, nsIHttpAuthenticator)
//-----------------------------------------------------------------------------
// nsHttpDigestAuth <protected>
//-----------------------------------------------------------------------------
nsresult
nsHttpDigestAuth::DoHash(const char *buf, uint32_t len, uint16_t algorithm)
{
  nsresult rv;
  // Cache a reference to the nsICryptoHash instance since we'll be calling
  // this function frequently.
  if (!mVerifier) {
    mVerifier = do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
    if (NS_FAILED(rv)) {
      LOG(("nsHttpDigestAuth: no crypto hash!\n"));
      return rv;
    }
  }
  if (algorithm == ALGO_SHA256 || algorithm == ALGO_SHA256_SESS) {
         rv = mVerifier->Init(nsICryptoHash::SHA256);
  } else {
         rv = mVerifier->Init(nsICryptoHash::MD5);
  }
  if (NS_FAILED(rv)) return rv;
  rv = mVerifier->Update((unsigned char*)buf, len);
  if (NS_FAILED(rv)) return rv;
  nsAutoCString hashString;
  rv = mVerifier->Finish(false, hashString);
  if (NS_FAILED(rv)) return rv;
  NS_ENSURE_STATE(hashString.Length() == sizeof(mHashBuf));
  memcpy(mHashBuf, hashString.get(), hashString.Length());
  return rv;
}
nsresult
nsHttpDigestAuth::GetMethodAndPath(nsIHttpAuthenticableChannel *authChannel,
                                   bool                         isProxyAuth,

NS_IMETHODIMP
nsHttpDigestAuth::ChallengeReceived(nsIHttpAuthenticableChannel *authChannel,
                                    const char *challenge,
                                    bool isProxyAuth,
                                    nsISupports **sessionState,
                                    nsISupports **continuationState,
                                    bool *result)
{
  nsAutoCString realm, domain, nonce, opaque, charset;
  bool stale;
  uint16_t algorithm, qop, userhash;
  nsresult rv = ParseChallenge(challenge, realm, domain, nonce, opaque, charset
                               &stale, &algorithm, &qop, &userhash);
  if (NS_FAILED(rv)) return rv;
  // if the challenge has the "stale" flag set, then the user identity is not
  // necessarily invalid.  by returning FALSE here we can suppress username
  // and password prompting that usually accompanies a 401/407 challenge.
  *result = !stale;
  // clear any existing nonce_count since we have a new challenge.

  }
  nsresult rv;
  nsAutoCString httpMethod;
  nsAutoCString path;
  rv = GetMethodAndPath(authChannel, isProxyAuth, httpMethod, path);
  if (NS_FAILED(rv)) return rv;
  nsAutoCString realm, domain, nonce, opaque, charset;
  bool stale;
  uint16_t algorithm, qop, userhash;
  rv = ParseChallenge(challenge, realm, domain, nonce, opaque, charset,
                      &stale, &algorithm, &qop, &userhash);
  if (NS_FAILED(rv)) {
    LOG(("nsHttpDigestAuth::GenerateCredentials [ParseChallenge failed rv=%x]\n
    return rv;
  }

  char ha1_digest[EXPANDED_DIGEST_SHA256_LENGTH+1];
  char ha2_digest[EXPANDED_DIGEST_SHA256_LENGTH+1];
  char response_digest[EXPANDED_DIGEST_SHA256_LENGTH+1];
  char upload_data_digest[EXPANDED_DIGEST_SHA256_LENGTH+1];
  if (qop & QOP_AUTH_INT) {
    // we do not support auth-int "quality of protection" currently
    qop &= ~QOP_AUTH_INT;
    NS_WARNING("no support for Digest authentication with data integrity qualit
    /* TODO: to support auth-int, we need to get an MD5 digest of

      NS_ENSURE_TRUE(uc, NS_ERROR_UNEXPECTED);
      uc->GetUploadStream(&upload);
      if (upload) {
        char * upload_buffer;
        int upload_buffer_length = 0;
        //TODO: read input stream into buffer
        const char * digest = (const char*)
        nsNetwerkMD5Digest(upload_buffer, upload_buffer_length);
        ExpandToHex(digest, algorithm, upload_data_digest);
        NS_RELEASE(upload);
      }
    }
#endif
  }
  if (!(algorithm == ALGO_MD5 || algorithm == ALGO_MD5_SESS ||
    algorithm == ALGO_SHA256 || algorithm == ALGO_SHA256_SESS)) {
    // they asked only for algorithms that we do not support
    NS_WARNING("unsupported algorithm requested by Digest authentication");
    return NS_ERROR_NOT_IMPLEMENTED;
  }
  //
  // the following are for increasing security.  see RFC 2617 for more
  // information.

    cnonce.Append(hexChar[(int)(15.0 * rand()/(RAND_MAX + 1.0))]);
  }
  LOG(("   cnonce=%s\n", cnonce.get()));
  //
  // calculate credentials
  //
  nsAutoCString cUser;
  nsAutoCString cPass;
  if(charset.EqualsLiteral("ISO-8859-1")){
    /**
     *Actually it is ISO-8859-1
     */
    LossyCopyUTF16toASCII(username, cUser);
    LossyCopyUTF16toASCII(password, cPass);
  } else if (charset.EqualsLiteral("UTF-8")) {
    CopyUTF16toUTF8(username, cUser);
    CopyUTF16toUTF8(password, cPass);
  } else {
    /**
          *This true lossy convert UTF16 to ASCII
          *ASCII is an 7-bit encoding
     */
    const char16_t *p = username;
         cUser.Assign(*p % 128);
         p++;
         for (;*p != 0;p++) {
           cUser.Append(*p % 128);
         }
         p = password;
         cPass.Assign(*p % 128);
         p++;
         for (;*p != 0;p++) {
           cPass.Append(*p % 128);
         }
  }

  rv = CalculateHA1(cUser, cPass, realm, algorithm, nonce, cnonce, ha1_digest);
  if (NS_FAILED(rv)) return rv;
  rv = CalculateHA2(httpMethod, path, qop, algorithm, upload_data_digest,
                       ha2_digest);
  if (NS_FAILED(rv)) return rv;
  rv = CalculateResponse(ha1_digest, ha2_digest, nonce, qop, algorithm, nonce_c
                         cnonce, response_digest);
  if (NS_FAILED(rv)) return rv;
  //
  // Values that need to match the quoted-string production from RFC 2616:
  //
  //    username
  //    realm
  //    nonce
  //    opaque
  //    cnonce
  //
  nsAutoCString authString;
  if (userhash == 2) {
         char hashuser[EXPANDED_DIGEST_SHA256_LENGTH+1];
    cUser.Append(":");
    cUser.Append(realm);
         rv = DoHash(cUser.get(), cUser.Length(), algorithm);
    if (NS_FAILED(rv)) return rv;
         ExpandToHex(mHashBuf, algorithm, hashuser);
         authString.AssignLiteral("Digest username=\"");
         authString += hashuser;
         authString += '\"';
  } else if (charset.EqualsLiteral("ISO-8859-1") ||
    charset.EqualsLiteral("UTF-8")) {
    if (charset.EqualsLiteral("ISO-8859-1")) {
      authString.AssignLiteral("Digest username*=ISO-8859-1\'\'");
    } else {
      authString.AssignLiteral("Digest username*=UTF-8\'\'");
    }
    nsAutoCString escUser;
    NS_Escape(cUser, escUser,  url_XAlphas);
    authString.Append(escUser);
  } else {
    authString.AssignLiteral("Digest username=");
    rv = AppendQuotedString(cUser, authString);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  authString.AppendLiteral(", realm=");
  rv = AppendQuotedString(realm, authString);
  NS_ENSURE_SUCCESS(rv, rv);
  authString.AppendLiteral(", nonce=");
  rv = AppendQuotedString(nonce, authString);
  NS_ENSURE_SUCCESS(rv, rv);
  authString.AppendLiteral(", uri=\"");
  authString += path;
  authString.AppendLiteral("\", algorithm=");
  if (algorithm == ALGO_SHA256_SESS) {
       authString.AppendLiteral("SHA-256-sess");
  } else if (algorithm == ALGO_SHA256) {
         authString.AppendLiteral("SHA-256");
  } else if (algorithm == ALGO_MD5_SESS) {
         authString.AppendLiteral("MD5-sess");
  } else {
         authString.AppendLiteral("MD5");
  }
  authString.AppendLiteral(", response=\"");
  authString += response_digest;
  authString += '\"';
  if (!opaque.IsEmpty()) {
    authString.AppendLiteral(", opaque=");
    rv = AppendQuotedString(opaque, authString);

    authString.AppendLiteral(", nc=");
    authString += nonce_count;
    authString.AppendLiteral(", cnonce=");
    rv = AppendQuotedString(cnonce, authString);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  if (userhash) {
    authString.AppendLiteral(", userhash=");
    if(userhash == 2){
      authString.AppendLiteral("true");
    } else {
      authString.AppendLiteral("false");
    }
  }
  *creds = ToNewCString(authString);
  return NS_OK;
}
NS_IMETHODIMP
nsHttpDigestAuth::GetAuthFlags(uint32_t *flags)
{

  return NS_OK;
}
nsresult
nsHttpDigestAuth::CalculateResponse(const char * ha1_digest,
                                    const char * ha2_digest,
                                    const nsAFlatCString & nonce,
                                    uint16_t qop,
                                    uint16_t algorithm,
                                    const char * nonce_count,
                                    const nsAFlatCString & cnonce,
                                    char * result)
{
  uint32_t len = nonce.Length() + 2 + ExpadedDigestLength(algorithm) * 2;

  if (qop & QOP_AUTH || qop & QOP_AUTH_INT) {
    len += cnonce.Length() + NONCE_COUNT_LENGTH + 3;
    if (qop & QOP_AUTH_INT)
      len += 8; // length of "auth-int"
    else
      len += 4; // length of "auth"
  }
  nsAutoCString contents;
  contents.SetCapacity(len);
       contents.Assign(ha1_digest, ExpadedDigestLength(algorithm));
  contents.Append(':');
  contents.Append(nonce);
  contents.Append(':');
  if (qop & QOP_AUTH || qop & QOP_AUTH_INT) {
    contents.Append(nonce_count, NONCE_COUNT_LENGTH);
    contents.Append(':');
    contents.Append(cnonce);
    contents.Append(':');
    if (qop & QOP_AUTH_INT)
      contents.AppendLiteral("auth-int:");
    else
      contents.AppendLiteral("auth:");
  }
       contents.Append(ha2_digest, ExpadedDigestLength(algorithm));
  nsresult rv = DoHash(contents.get(), contents.Length(), algorithm);
  if (NS_SUCCEEDED(rv))
    rv = ExpandToHex(mHashBuf, algorithm, result);
  return rv;
}
nsresult
nsHttpDigestAuth::ExpandToHex(const char * digest, int16_t algorithm, char * re
{
  int16_t index, value, digestLen;
       digestLen = DigestLength(algorithm);
  for (index = 0; index < digestLen; index++) {
    value = (digest[index] >> 4) & 0xf;
    if (value < 10)
      result[index*2] = value + '0';
    else
      result[index*2] = value - 10 + 'a';
    value = digest[index] & 0xf;
    if (value < 10)
      result[(index*2)+1] = value + '0';
    else
      result[(index*2)+1] = value - 10 + 'a';
  }
  result[digestLen * 2] = 0;
  return NS_OK;
}
nsresult
nsHttpDigestAuth::CalculateHA1(const nsAFlatCString & username,
                               const nsAFlatCString & password,
                               const nsAFlatCString & realm,
                               uint16_t algorithm,
                               const nsAFlatCString & nonce,
                               const nsAFlatCString & cnonce,
                               char * result)
{
  int16_t len = username.Length() + password.Length() + realm.Length() + 2;
  if (algorithm & ALGO_MD5_SESS) {
    int16_t exlen = EXPANDED_DIGEST_LENGTH + nonce.Length() + cnonce.Length() +
2;
  if (algorithm == ALGO_MD5_SESS || algorithm == ALGO_SHA256_SESS) {
    int16_t exlen = ExpadedDigestLength(algorithm) + nonce.Length() +
      cnonce.Length() + 2;
    if (exlen > len)
      len = exlen;
  }
  nsAutoCString contents;
  contents.SetCapacity(len + 1);
  contents.Assign(username);
  contents.Append(':');
  contents.Append(realm);
  contents.Append(':');
  contents.Append(password);
  nsresult rv;
  rv = DoHash(contents.get(), contents.Length(), algorithm);
  if (NS_FAILED(rv))
    return rv;
  if (algorithm == ALGO_MD5_SESS || algorithm == ALGO_SHA256_SESS) {
         char part1[EXPANDED_DIGEST_SHA256_LENGTH + 1];
         ExpandToHex(mHashBuf, algorithm, part1);
       contents.Assign(part1, ExpadedDigestLength(algorithm));
    contents.Append(':');
    contents.Append(nonce);
    contents.Append(':');
    contents.Append(cnonce);
    rv = DoHash(contents.get(), contents.Length(), algorithm);
    if (NS_FAILED(rv))
      return rv;
  }
  return ExpandToHex(mHashBuf, algorithm, result);
}
nsresult
nsHttpDigestAuth::CalculateHA2(const nsAFlatCString & method,
                               const nsAFlatCString & path,
                               uint16_t qop,
                               uint16_t algorithm,
                               const char * bodyDigest,
                               char * result)
{
  uint16_t methodLen = method.Length();
  uint32_t pathLen = path.Length();
  uint32_t len = methodLen + pathLen + 1;
  if (qop & QOP_AUTH_INT) {
           len += ExpadedDigestLength(algorithm) + 1;
  }
  nsAutoCString contents;
  contents.SetCapacity(len);
  contents.Assign(method);
  contents.Append(':');
  contents.Append(path);
  if (qop & QOP_AUTH_INT) {
    contents.Append(':');
         contents.Append(bodyDigest, ExpadedDigestLength(algorithm));
  }
  nsresult rv = DoHash(contents.get(), contents.Length(), algorithm);
  if (NS_SUCCEEDED(rv))
    rv = ExpandToHex(mHashBuf, algorithm, result);
  return rv;
}
nsresult
nsHttpDigestAuth::ParseChallenge(const char * challenge,
                                 nsACString & realm,
                                 nsACString & domain,
                                 nsACString & nonce,
                                 nsACString & opaque,
                                 nsACString & charset,
                                 bool * stale,
                                 uint16_t * algorithm,
                                 uint16_t * qop,
                                 uint16_t * userhash)
{
  // put an absurd, but maximum, length cap on the challenge so
  // that calculations are 32 bit safe
  if (strlen(challenge) > 16000000) {
    return NS_ERROR_INVALID_ARG;
  }
  const char *p = challenge + 7; // first 7 characters are "Digest "
  *userhash = 0;
  *stale = false;
  *algorithm = ALGO_MD5; // default is MD5
  *qop = 0;
  for (;;) {
    while (*p && (*p == ',' || nsCRT::IsAsciiSpace(*p)))
      ++p;
    if (!*p)

    {
      nonce.Assign(challenge+valueStart, valueLength);
    }
    else if (nameLength == 6 &&
        nsCRT::strncasecmp(challenge+nameStart, "opaque", 6) == 0)
    {
      opaque.Assign(challenge+valueStart, valueLength);
    }
    else if (nameLength == 7 &&
             nsCRT::strncasecmp(challenge+nameStart, "charset", 7) == 0)
    {
      charset.Assign(challenge+valueStart, valueLength);
    }
    else if (nameLength == 8 &&
             nsCRT::strncasecmp(challenge+nameStart, "userhash", 8) == 0)
    {
      if (nsCRT::strncasecmp(challenge+valueStart, "true", 4) == 0){
        *userhash = 2;
      }
      else{
        *userhash = 1;
      }
    }
    else if (nameLength == 5 &&
        nsCRT::strncasecmp(challenge+nameStart, "stale", 5) == 0)
    {
      if (nsCRT::strncasecmp(challenge+valueStart, "true", 4) == 0)
        *stale = true;
      else
        *stale = false;
    }
    else if (nameLength == 9 &&
        nsCRT::strncasecmp(challenge+nameStart, "algorithm", 9) == 0)
    {
      // we want to clear the default, so we use = not |= here
      *algorithm = ALGO_SPECIFIED;
      if (valueLength == 3 &&
          nsCRT::strncasecmp(challenge+valueStart, "MD5", 3) == 0) {
        *algorithm = ALGO_MD5;
      }
      else if (valueLength == 8 &&
          nsCRT::strncasecmp(challenge+valueStart, "MD5-sess", 8) == 0) {
        *algorithm = ALGO_MD5_SESS;
      }
      else if (valueLength == 7 &&
               nsCRT::strncasecmp(challenge+valueStart, "SHA-256", 7) == 0) {
        *algorithm = ALGO_SHA256;
      }
      else if (valueLength == 12 &&
               nsCRT::strncasecmp(challenge+valueStart, "SHA-256-sess", 12) ==
        *algorithm = ALGO_SHA256_SESS;
      }
    }
    else if (nameLength == 3 &&
        nsCRT::strncasecmp(challenge+nameStart, "qop", 3) == 0)
    {
      int32_t ipos = valueStart;
      while (ipos < valueStart+valueLength) {
        while (ipos < valueStart+valueLength &&
               (nsCRT::IsAsciiSpace(challenge[ipos]) ||

    // Escape two syntactically significant characters
    if (*s == '"' || *s == '\\') {
      quoted.Append('\\');
    }
    quoted.Append(*s);
  }
  // FIXME: bug 41489
  // We should RFC2047-encode non-Latin-1 values according to spec
  quoted.Append('"');
  aHeaderLine.Append(quoted);
  return NS_OK;
}
int16_t
nsHttpDigestAuth::DigestLength(int16_t algorithm)
{
  MOZ_ASSERT(algorithm >= ALGO_SPECIFIED && algorithm <= ALGO_SHA256_SESS);
  int16_t len;
  if (algorithm == ALGO_SHA256 || algorithm == ALGO_SHA256_SESS) {
    len = DIGEST_SHA256_LENGTH;
  } else {
    len = DIGEST_LENGTH;
  }
  return len;
}

int16_t
nsHttpDigestAuth::ExpadedDigestLength(int16_t algorithm)
{
  return DigestLength(algorithm) * 2;
}

} // namespace net
} // namespace mozilla
// vim: ts=2 sw=2
++ /c/mozilla-release-8168af494649/netwerk/protocol/http/nsHttpDigestAuth.h2016
01-19 19:38:08 +0700
01-29 04:12:20 +0700

#include "mozilla/Attributes.h"
class nsICryptoHash;
namespace mozilla { namespace net {
#define ALGO_SPECIFIED 0x01
#define ALGO_MD5 0x02
#define ALGO_MD5_SESS 0x03
#define ALGO_SHA256 0x04
#define ALGO_SHA256_SESS 0x05
#define QOP_AUTH 0x01
#define QOP_AUTH_INT 0x02
#define DIGEST_LENGTH 16
#define DIGEST_SHA256_LENGTH 32
#define EXPANDED_DIGEST_SHA256_LENGTH 64
#define NONCE_COUNT_LENGTH 8
//-----------------------------------------------------------------------------
// nsHttpDigestAuth
//-----------------------------------------------------------------------------
class nsHttpDigestAuth final : public nsIHttpAuthenticator
{

    NS_DECL_ISUPPORTS
    NS_DECL_NSIHTTPAUTHENTICATOR
    nsHttpDigestAuth();
  protected:
    ~nsHttpDigestAuth();
    nsresult ExpandToHex(const char * digest, int16_t algorithm, char * result)
    nsresult CalculateResponse(const char * ha1_digest,
                               const char * ha2_digest,
                               const nsAFlatCString & nonce,
                               uint16_t qop,
                               uint16_t algorithm,
                               const char * nonce_count,
                               const nsAFlatCString & cnonce,
                               char * result);
    nsresult CalculateHA1(const nsAFlatCString & username,
                          const nsAFlatCString & password,
                          const nsAFlatCString & realm,
                          uint16_t algorithm,
                          const nsAFlatCString & nonce,
                          const nsAFlatCString & cnonce,
                          char * result);
    nsresult CalculateHA2(const nsAFlatCString & http_method,
                          const nsAFlatCString & http_uri_path,
                          uint16_t qop,
                          uint16_t algorithm,
                          const char * body_digest,
                          char * result);
    nsresult ParseChallenge(const char * challenge,
                            nsACString & realm,
                            nsACString & domain,
                            nsACString & nonce,
                            nsACString & opaque,
                            nsACString & charset,
                            bool * stale,
                            uint16_t * algorithm,
                            uint16_t * qop,
                            uint16_t * userhash);
    // result is in mHashBuf
    nsresult DoHash(const char *buf, uint32_t len, uint16_t algorithm);
    nsresult GetMethodAndPath(nsIHttpAuthenticableChannel *,
                              bool, nsCString &, nsCString &);
    // append the quoted version of value to aHeaderLine
    nsresult AppendQuotedString(const nsACString & value,
                                nsACString & aHeaderLine);
    int16_t DigestLength(int16_t algorithm);
    int16_t ExpadedDigestLength(int16_t algorithm);
  protected:
    nsCOMPtr<nsICryptoHash>        mVerifier;
    char                           mHashBuf[DIGEST_SHA256_LENGTH];
};
} // namespace net
} // namespace mozilla

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Attachment #8714628: to do here as draft-ietf-httpauth-digest for bug #41489