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authorRemko Tronçon <git@el-tramo.be>2009-11-21 00:59:21 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-11-21 01:01:05 (GMT)
commit2c8bfd7c49bd16bebbf0b89c01fce7817afab74f (patch)
tree1a7c73d4aaf81a1e243ee6f50de0385e9e6a081f /Swiften/SASL
parentfe007f1afdaf29c7ce0302da2984b5611503a822 (diff)
downloadswift-2c8bfd7c49bd16bebbf0b89c01fce7817afab74f.zip
swift-2c8bfd7c49bd16bebbf0b89c01fce7817afab74f.tar.bz2
Implemented SCRAM-SHA-1 for real now.
Still need to do some cleanup and polishing.
Diffstat (limited to 'Swiften/SASL')
-rw-r--r--Swiften/SASL/ClientAuthenticator.h2
-rw-r--r--Swiften/SASL/PLAINClientAuthenticator.cpp2
-rw-r--r--Swiften/SASL/PLAINClientAuthenticator.h2
-rw-r--r--Swiften/SASL/SCRAMSHA1ClientAuthenticator.cpp88
-rw-r--r--Swiften/SASL/SCRAMSHA1ClientAuthenticator.h20
5 files changed, 77 insertions, 37 deletions
diff --git a/Swiften/SASL/ClientAuthenticator.h b/Swiften/SASL/ClientAuthenticator.h
index f42a51e..f93f44e 100644
--- a/Swiften/SASL/ClientAuthenticator.h
+++ b/Swiften/SASL/ClientAuthenticator.h
@@ -19,7 +19,7 @@ namespace Swift {
this->authzid = authzid;
}
- virtual ByteArray getResponse() const = 0;
+ virtual ByteArray getResponse() = 0;
virtual bool setChallenge(const ByteArray&) = 0;
const String& getAuthenticationID() const {
diff --git a/Swiften/SASL/PLAINClientAuthenticator.cpp b/Swiften/SASL/PLAINClientAuthenticator.cpp
index 8f88c3c..f61f1a0 100644
--- a/Swiften/SASL/PLAINClientAuthenticator.cpp
+++ b/Swiften/SASL/PLAINClientAuthenticator.cpp
@@ -5,7 +5,7 @@ namespace Swift {
PLAINClientAuthenticator::PLAINClientAuthenticator() : ClientAuthenticator("PLAIN") {
}
-ByteArray PLAINClientAuthenticator::getResponse() const {
+ByteArray PLAINClientAuthenticator::getResponse() {
return ByteArray(getAuthorizationID()) + '\0' + ByteArray(getAuthenticationID()) + '\0' + ByteArray(getPassword());
}
diff --git a/Swiften/SASL/PLAINClientAuthenticator.h b/Swiften/SASL/PLAINClientAuthenticator.h
index 854eb30..bb24af7 100644
--- a/Swiften/SASL/PLAINClientAuthenticator.h
+++ b/Swiften/SASL/PLAINClientAuthenticator.h
@@ -7,7 +7,7 @@ namespace Swift {
public:
PLAINClientAuthenticator();
- virtual ByteArray getResponse() const;
+ virtual ByteArray getResponse();
virtual bool setChallenge(const ByteArray&);
};
}
diff --git a/Swiften/SASL/SCRAMSHA1ClientAuthenticator.cpp b/Swiften/SASL/SCRAMSHA1ClientAuthenticator.cpp
index f5c55c0..41e8f72 100644
--- a/Swiften/SASL/SCRAMSHA1ClientAuthenticator.cpp
+++ b/Swiften/SASL/SCRAMSHA1ClientAuthenticator.cpp
@@ -1,56 +1,94 @@
#include "Swiften/SASL/SCRAMSHA1ClientAuthenticator.h"
#include <cassert>
+#include <map>
+#include <boost/lexical_cast.hpp>
#include "Swiften/StringCodecs/SHA1.h"
+#include "Swiften/StringCodecs/Base64.h"
#include "Swiften/StringCodecs/HMACSHA1.h"
+#include "Swiften/StringCodecs/PBKDF2.h"
namespace Swift {
-SCRAMSHA1ClientAuthenticator::SCRAMSHA1ClientAuthenticator(const ByteArray& nonce) : ClientAuthenticator("SCRAM-SHA-1"), step(Initial), clientnonce(nonce) {
+SCRAMSHA1ClientAuthenticator::SCRAMSHA1ClientAuthenticator(const String& nonce) : ClientAuthenticator("SCRAM-SHA-1"), step(Initial), clientnonce(nonce) {
+ // TODO: Normalize authentication id
+ // TODO: Normalize getPassword()
}
-ByteArray SCRAMSHA1ClientAuthenticator::getResponse() const {
+ByteArray SCRAMSHA1ClientAuthenticator::getResponse() {
if (step == Initial) {
- return getInitialClientMessage();
+ return "n,," + getInitialBareClientMessage();
}
else {
- ByteArray mask = HMACSHA1::getResult(getClientVerifier(), initialServerMessage + getInitialClientMessage());
- ByteArray p = SHA1::getBinaryHash(getPassword());
- for (unsigned int i = 0; i < p.getSize(); ++i) {
- p[i] ^= mask[i];
+ ByteArray saltedPassword = PBKDF2::encode(getPassword(), salt, iterations);
+ ByteArray clientKey = HMACSHA1::getResult(saltedPassword, "Client Key");
+ ByteArray storedKey = SHA1::getBinaryHash(clientKey);
+ ByteArray serverKey = HMACSHA1::getResult(saltedPassword, "Server Key");
+
+ ByteArray authMessage = getInitialBareClientMessage() + "," + initialServerMessage + "," + "c=biwsCg==," + "r=" + clientnonce + serverNonce;
+ ByteArray clientSignature = HMACSHA1::getResult(storedKey, authMessage);
+ serverSignature = HMACSHA1::getResult(serverKey, authMessage);
+ ByteArray clientProof = clientKey;
+ for (unsigned int i = 0; i < clientProof.getSize(); ++i) {
+ clientProof[i] ^= clientSignature[i];
}
- return p;
+ ByteArray result = ByteArray("c=biwsCg==,r=") + clientnonce + serverNonce + ",p=" + Base64::encode(clientProof);
+ return result;
}
}
-bool SCRAMSHA1ClientAuthenticator::setChallenge(const ByteArray& response) {
+bool SCRAMSHA1ClientAuthenticator::setChallenge(const ByteArray& challenge) {
if (step == Initial) {
- initialServerMessage = response;
+ initialServerMessage = challenge;
+
+ // TODO: Check if these values are correct
+ std::map<char, String> keys = parseMap(String(initialServerMessage.getData(), initialServerMessage.getSize()));
+ salt = Base64::decode(keys['s']);
+ String clientServerNonce = keys['r'];
+ serverNonce = clientServerNonce.getSubstring(clientnonce.getUTF8Size(), clientServerNonce.npos());
+ iterations = boost::lexical_cast<int>(keys['i'].getUTF8String());
+
step = Proof;
- return getSalt().getSize() > 0;
+ return true;
}
else {
- return response == HMACSHA1::getResult(getClientVerifier(), getInitialClientMessage() + initialServerMessage);
+ return challenge == Base64::encode(ByteArray("v=") + Base64::encode(serverSignature));
}
}
-ByteArray SCRAMSHA1ClientAuthenticator::getSalt() const {
- if (initialServerMessage.getSize() < 8) {
- std::cerr << "ERROR: SCRAM-SHA1: Invalid server response" << std::endl;
- return ByteArray();
- }
- else {
- return ByteArray(initialServerMessage.getData(), 8);
+std::map<char, String> SCRAMSHA1ClientAuthenticator::parseMap(const String& s) {
+ // TODO: Do some proper checking here
+ std::map<char, String> result;
+ if (s.getUTF8Size() > 0) {
+ char key;
+ String value;
+ size_t i = 0;
+ bool expectKey = true;
+ while (i < s.getUTF8Size()) {
+ if (expectKey) {
+ key = s[i];
+ expectKey = false;
+ i++;
+ }
+ else if (s[i] == ',') {
+ result[key] = value;
+ value = "";
+ expectKey = true;
+ }
+ else {
+ value += s[i];
+ }
+ i++;
+ }
+ result[key] = value;
}
+ return result;
}
-ByteArray SCRAMSHA1ClientAuthenticator::getClientVerifier() const {
- return HMACSHA1::getResult(SHA1::getBinaryHash(getPassword()), getSalt());
-}
-
-ByteArray SCRAMSHA1ClientAuthenticator::getInitialClientMessage() const {
- return ByteArray(getAuthorizationID()) + '\0' + ByteArray(getAuthenticationID()) + '\0' + ByteArray(clientnonce);
+ByteArray SCRAMSHA1ClientAuthenticator::getInitialBareClientMessage() const {
+ // TODO: Replace , and =
+ return ByteArray(String("n=" + getAuthenticationID() + ",r=" + clientnonce));
}
}
diff --git a/Swiften/SASL/SCRAMSHA1ClientAuthenticator.h b/Swiften/SASL/SCRAMSHA1ClientAuthenticator.h
index 161afd1..ec800cc 100644
--- a/Swiften/SASL/SCRAMSHA1ClientAuthenticator.h
+++ b/Swiften/SASL/SCRAMSHA1ClientAuthenticator.h
@@ -1,5 +1,7 @@
#pragma once
+#include <map>
+
#include "Swiften/Base/String.h"
#include "Swiften/Base/ByteArray.h"
#include "Swiften/SASL/ClientAuthenticator.h"
@@ -7,25 +9,25 @@
namespace Swift {
class SCRAMSHA1ClientAuthenticator : public ClientAuthenticator {
public:
- SCRAMSHA1ClientAuthenticator(const ByteArray& nonce);
+ SCRAMSHA1ClientAuthenticator(const String& nonce);
- ByteArray getResponse() const;
+ ByteArray getResponse();
bool setChallenge(const ByteArray&);
private:
- ByteArray getInitialClientMessage() const;
- ByteArray getSalt() const;
- ByteArray getClientVerifier() const;
+ ByteArray getInitialBareClientMessage() const;
+ static std::map<char, String> parseMap(const String&);
private:
enum Step {
Initial,
Proof
} step;
- String authcid;
- String password;
- String authzid;
- ByteArray clientnonce;
+ String clientnonce;
ByteArray initialServerMessage;
+ int iterations;
+ ByteArray serverNonce;
+ ByteArray salt;
+ ByteArray serverSignature;
};
}