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/*
* Copyright 2001-2005 Internet2
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* SAMLArtifact.cpp - SAML artifact implementations
Scott Cantor
2/15/05
$History:$
*/
#include <xercesc/util/Base64.hpp>
#include <xsec/enc/XSECCryptoProvider.hpp>
#include "internal.h"
using namespace saml;
using namespace std;
SAMLArtifact::SAMLArtifactFactoryMap SAMLArtifact::m_map;
extern "C" SAMLArtifact* SAMLArtifactType0001Factory(const char* s)
{
return new SAMLArtifactType0001(s);
}
extern "C" SAMLArtifact* SAMLArtifactType0002Factory(const char* s)
{
return new SAMLArtifactType0002(s);
}
string SAMLArtifact::toHex(const string& s)
{
static char DIGITS[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
int len = s.length();
string ret;
// two characters form the hex value.
for (int i=0; i < len; i++) {
ret+=(DIGITS[((unsigned char)(0xF0 & s[i])) >> 4 ]);
ret+=(DIGITS[0x0F & s[i]]);
}
return ret;
}
SAMLArtifact* SAMLArtifact::parse(const XMLCh* s)
{
auto_ptr_char temp(s);
return parse(temp.get());
}
SAMLArtifact* SAMLArtifact::parse(const char* s)
{
// Decode and extract the type code first.
unsigned int len=0;
XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(s),&len);
if (!decoded)
throw MalformedException("SAMLArtifact::parse() unable to decode base64 artifact");
string type;
type+= decoded[0];
type+= decoded[1];
XMLString::release(&decoded);
SAMLArtifactFactoryMap::const_iterator i=m_map.find(type);
if (i==m_map.end())
throw UnsupportedExtensionException(
string("SAMLArtifact::parse() unable to parse unknown artifact typecode (0x") + toHex(type) + ")"
);
return i->second(s);
}
SAMLArtifact::SAMLArtifact(const char* s)
{
unsigned int len=0;
XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(s),&len);
if (!decoded)
throw MalformedException("SAMLArtifact() unable to decode base64 artifact");
XMLByte* ptr=decoded;
while (len--)
m_raw+= *ptr++;
XMLString::release(&decoded);
}
string SAMLArtifact::encode() const
{
unsigned int len=0;
XMLByte* out=Base64::encode(reinterpret_cast<const XMLByte*>(m_raw.data()),m_raw.size(),&len);
if (out) {
string ret(reinterpret_cast<char*>(out),len);
XMLString::release(&out);
return ret;
}
return string();
}
const int SAMLArtifactType0001::SOURCEID_LENGTH = 20;
const int SAMLArtifactType0001::HANDLE_LENGTH = 20;
string SAMLArtifactType0001::generateSourceId(const char* s)
{
auto_ptr<XSECCryptoHash> hasher(XSECPlatformUtils::g_cryptoProvider->hashSHA1());
if (hasher.get()) {
auto_ptr<char> dup(strdup(s));
unsigned char buf[SOURCEID_LENGTH+1];
hasher->hash(reinterpret_cast<unsigned char*>(dup.get()),strlen(dup.get()));
if (hasher->finish(buf,SOURCEID_LENGTH)==SOURCEID_LENGTH) {
string ret;
for (int i=0; i<SOURCEID_LENGTH; i++)
ret+=buf[i];
return ret;
}
}
throw InvalidCryptoException("SAMLArtifactType0001::generateSourceId() unable to generate SHA-1 hash");
}
SAMLArtifactType0001::SAMLArtifactType0001(const char* s) : SAMLArtifact(s)
{
// The base class does the work, we just do the checking.
if (m_raw.size() != 2 + SOURCEID_LENGTH + HANDLE_LENGTH)
throw MalformedException("SAMLArtifactType0001() given artifact of incorrect length");
else if (m_raw[0] != 0x0 || m_raw[1] != 0x1)
throw MalformedException(
string("SAMLArtifactType0001() given artifact of invalid type (") + toHex(getTypeCode()) + ")"
);
}
SAMLArtifactType0001::SAMLArtifactType0001(const std::string& sourceid)
{
if (sourceid.size()!=SOURCEID_LENGTH)
throw MalformedException("SAMLArtifactType0001() given sourceid of incorrect length");
m_raw+=(char)0x0;
m_raw+=(char)0x1;
m_raw.append(sourceid,0,20);
char buf[20];
SAMLIdentifier::generateRandomBytes(buf,20);
for (int i=0; i<20; i++)
m_raw+=buf[i];
}
SAMLArtifactType0001::SAMLArtifactType0001(const std::string& sourceid, const std::string& handle)
{
if (sourceid.size()!=SOURCEID_LENGTH)
throw MalformedException("SAMLArtifactType0001() given sourceid of incorrect length");
if (handle.size()!=HANDLE_LENGTH)
throw MalformedException("SAMLArtifactType0001() given handle of incorrect length");
m_raw+=(char)0x0;
m_raw+=(char)0x1;
m_raw.append(sourceid,0,20);
m_raw.append(handle,0,20);
}
SAMLArtifact* SAMLArtifactType0001::clone() const
{
return new SAMLArtifactType0001(*this);
}
const int SAMLArtifactType0002::HANDLE_LENGTH = 20;
SAMLArtifactType0002::SAMLArtifactType0002(const char* s) : SAMLArtifact(s)
{
// The base class does the work, we just do the checking.
if (m_raw.size() <= 2 + HANDLE_LENGTH)
throw MalformedException("SAMLArtifactType0001() given artifact of incorrect length");
else if (m_raw[0] != 0x0 || m_raw[1] != 0x2)
throw MalformedException(
string("SAMLArtifactType0002() given artifact of invalid type (") + toHex(getTypeCode()) + ")"
);
}
SAMLArtifactType0002::SAMLArtifactType0002(const std::string& sourceLocation)
{
if (sourceLocation.empty())
throw MalformedException("SAMLArtifactType0002() given empty source location");
m_raw+=(char)0x0;
m_raw+=(char)0x2;
char buf[20];
SAMLIdentifier::generateRandomBytes(buf,20);
for (int i=0; i<20; i++)
m_raw+=buf[i];
m_raw+=sourceLocation;
}
SAMLArtifactType0002::SAMLArtifactType0002(const std::string& sourceLocation, const std::string& handle)
{
if (sourceLocation.empty())
throw MalformedException("SAMLArtifactType0002() given empty source location");
if (handle.size()!=HANDLE_LENGTH)
throw MalformedException("SAMLArtifactType0002() given handle of incorrect length");
m_raw+=(char)0x0;
m_raw+=(char)0x2;
m_raw.append(handle,0,20);
m_raw+=sourceLocation;
}
SAMLArtifact* SAMLArtifactType0002::clone() const
{
return new SAMLArtifactType0002(*this);
}
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