pike.git / lib / modules / Crypto.pmod / SCRAM.pike

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pike.git/lib/modules/Crypto.pmod/SCRAM.pike:12:   //! @note   //! This implementation does not pretend to support the full protocol.   //! Most notably optional extension arguments are not supported (yet).      #pike __REAL_VERSION__   #pragma strict_types   #require constant(Crypto.Hash)      private .Hash H; // hash object    - private string(8bit) first, cnonce; + private string(8bit) first, nonce;      constant ClientKey = "Client Key";   constant ServerKey = "Server Key";      private string(7bit) encode64(string(8bit) raw) {    return MIME.encode_base64(raw, 1);   }      //! Step 0 in the SCRAM handshake, prior to creating the object,   //! you need to have agreed with your peer on the hashfunction to be used.
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:57:   //! the username through an alternate channel (usually during   //! the hash-function selection handshake), in which case it   //! should be omitted here.   //!   //! @returns   //! The client-first request to send to the server.   //!   //! @seealso   //! @[client_2]   string(7bit) client_1(void|string username) { -  cnonce = encode64(random_string(18)); +  nonce = encode64(random_string(18));    return [string(7bit)](first = [string(8bit)]sprintf("n,,n=%s,r=%s",    username && username != "" ? Standards.IDNA.to_ascii(username, 1) : "", -  cnonce)); +  nonce));   }      //! Server-side step 1 in the SCRAM handshake.   //!   //! @param line   //! The received client-first request from the client.   //!   //! @returns   //! The username specified by the client. Returns null   //! if the response could not be parsed.
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:82:   //! @seealso   //! @[server_2]   string server_1(Stdio.Buffer|string(8bit) line) {    constant format = "n,,n=%s,r=%s";    string username, r;    catch {    first = line[3..];    [username, r] = stringp(line)    ? array_sscanf([string]line, format)    : [array(string)](line->sscanf(format)); -  cnonce = [string(8bit)]r; +  nonce = [string(8bit)]r;    r = Standards.IDNA.to_unicode(username);    };    return r;   }      //! Server-side step 2 in the SCRAM handshake.   //!   //! @param salt   //! The salt corresponding to the username that has been specified earlier.   //!
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:104:   //! The number of iterations the hashing algorithm should perform   //! to compute the authentication hash.   //!   //! @returns   //! The server-first challenge to send to the client.   //!   //! @seealso   //! @[server_3]   string(7bit) server_2(string(8bit) salt, int iters) {    string response = sprintf("r=%s,s=%s,i=%d", -  cnonce += encode64(random_string(18)), encode64(salt), iters); +  nonce += encode64(random_string(18)), encode64(salt), iters);    first += "," + response + ",";    return [string(7bit)]response;   }      //! Client-side step 2 in the SCRAM handshake.   //!   //! @param line   //! The received server-first challenge from the server.   //!   //! @param pass
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:131:   //! @seealso   //! @[client_3]   string(7bit) client_2(Stdio.Buffer|string(8bit) line, string pass) {    constant format = "r=%s,s=%s,i=%d";    string r, salt;    int iters;    if (!catch([r, salt, iters] = stringp(line)    ? array_sscanf([string]line, format)    : [array(string)](line->sscanf(format)))    && iters > 0 -  && has_prefix(r, cnonce)) { +  && has_prefix(r, nonce)) {    line = [string(8bit)]sprintf("c=biws,r=%s", r);    r = sprintf("%s,r=%s,s=%s,i=%d,%s", first[3..], r, salt, iters, line);    if (pass != "")    pass = Standards.IDNA.to_ascii(pass);    salt = MIME.decode_base64(salt); -  cnonce = sprintf("%s,%s,%d", pass, salt, iters); -  if (!(first = .SCRAM_get_salted_password(H, cnonce))) { +  nonce = sprintf("%s,%s,%d", pass, salt, iters); +  if (!(first = .SCRAM_get_salted_password(H, nonce))) {    first = [string(8bit)]H->pbkdf2(pass, salt, iters, H->digest_size()); -  .SCRAM_set_salted_password(first, H, cnonce); +  .SCRAM_set_salted_password(first, H, nonce);    }    Crypto.MAC.State hmacfirst = HMAC(first);    first = 0; // Free memory    salt = hmacfirst([string(8bit)]ClientKey);    salt = sprintf("%s,p=%s", line,    encode64(salt    ^ HMAC(H->hash([string(8bit)]salt))([string(8bit)]r))); -  cnonce = HMAC(hmacfirst([string(8bit)]ServerKey))([string(8bit)]r); +  nonce = HMAC(hmacfirst([string(8bit)]ServerKey))([string(8bit)]r);    } else    salt = 0;    return [string(7bit)]salt;   }      //! Final server-side step in the SCRAM handshake.   //!   //! @param line   //! The received client-final challenge and response from the client.   //!
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:174:   //! The server-final response to send to the client. If the response   //! is null, the client did not supply the correct credentials or   //! the response was unparseable.   string(7bit) server_3(Stdio.Buffer|string(8bit) line,    string(8bit) salted_password) {    constant format = "c=biws,r=%s,p=%s";    string r, p, response;    if (!catch([r, p] = stringp(line)    ? array_sscanf([string]line, format)    : [array(string)](line->sscanf(format))) -  && r == cnonce) { +  && r == nonce) {    first += sprintf("c=biws,r=%s", r);    Crypto.MAC.State hmacfirst = HMAC(salted_password);    r = hmacfirst([string(8bit)]ClientKey);    if (MIME.decode_base64(p)    == [string(8bit)](r ^ HMAC(H->hash([string(8bit)]r))(first)))    response = sprintf("v=%s", encode64(HMAC(    hmacfirst([string(8bit)]ServerKey))(first)));    }    return response;   }
pike.git/lib/modules/Crypto.pmod/SCRAM.pike:202:   //! The received server-final verification response.   //!   //! @returns   //! True if the server is valid, false if the server is invalid.   int(0..1) client_3(Stdio.Buffer|string(8bit) line) {    constant format = "v=%s";    string(8bit) v;    return !catch([v] = stringp(line)    ? array_sscanf(line, format)    : line->sscanf(format)) -  && MIME.decode_base64(v) == cnonce; +  && MIME.decode_base64(v) == nonce;   }