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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*
* XSEC
*
* TXFMSHA1 := Class that performs a SHA1 transform
*
* $Id: TXFMSHA1.cpp 1125514 2011-05-20 19:08:33Z scantor $
*
*/
// XSEC
#include <xsec/transformers/TXFMSHA1.hpp>
#include <xsec/utils/XSECPlatformUtils.hpp>
#include <xsec/framework/XSECException.hpp>
XERCES_CPP_NAMESPACE_USE
TXFMSHA1::TXFMSHA1(DOMDocument *doc, hashMethod hm,
XSECCryptoKey * key) : TXFMBase (doc) {
toOutput = 0; // Nothing yet to output
int hashLen = 0;
switch (hm) {
case HASH_SHA224 :
hashLen = 224;
break;
case HASH_SHA256 :
hashLen = 256;
break;
case HASH_SHA384 :
hashLen = 384;
break;
case HASH_SHA512 :
hashLen = 512;
break;
default:
hashLen = 160;
}
if (key == NULL)
// Get a SHA1 worker
mp_h = XSECPlatformUtils::g_cryptoProvider->hashSHA(hashLen);
else {
// Get an HMAC Sha1
mp_h = XSECPlatformUtils::g_cryptoProvider->hashHMACSHA(hashLen);
if (!mp_h) {
throw XSECException(XSECException::CryptoProviderError,
"Error requesting SHA1 object from Crypto Provider");
}
mp_h->setKey(key);
}
if (!mp_h) {
throw XSECException(XSECException::CryptoProviderError,
"Error requesting SHA1 object from Crypto Provider");
}
};
TXFMSHA1::~TXFMSHA1() {
// Clean up
if (mp_h)
delete mp_h;
};
// Methods to set the inputs
//void TXFMSHA1::setInput(TXFMBase *input);
// Methods to get tranform output type and input requirement
TXFMBase::ioType TXFMSHA1::getInputType(void) {
return TXFMBase::BYTE_STREAM;
}
TXFMBase::ioType TXFMSHA1::getOutputType(void) {
return TXFMBase::BYTE_STREAM;
}
TXFMBase::nodeType TXFMSHA1::getNodeType(void) {
return TXFMBase::DOM_NODE_NONE;
}
// Methods to set input data
void TXFMSHA1::setInput(TXFMBase * inputT) {
input = inputT;
keepComments = input->getCommentsStatus();
// Now run through the data
unsigned char buffer[1024];
unsigned int size;
while ((size = input->readBytes((XMLByte *) buffer, 1024)) != 0) {
#if 0
// Some useful debbugging code
FILE * f = fopen("debug.out","a+b");
fwrite(buffer, size, 1, f);
fclose(f);
#endif
mp_h->hash(buffer, size);
}
// Finalise
md_len = mp_h->finish(md_value, CRYPTO_MAX_HASH_SIZE);
toOutput = md_len;
}
unsigned int TXFMSHA1::readBytes(XMLByte * const toFill, unsigned int maxToFill) {
unsigned int ret;
if (toOutput == 0)
return 0;
// Check if we can just output everything left
if (toOutput <= maxToFill) {
memcpy((char *) toFill, &md_value[md_len - toOutput], toOutput);
ret = toOutput;
toOutput = 0;
return ret;
}
// Output just some
memcpy((char *) toFill, &md_value[md_len - toOutput], maxToFill);
ret = maxToFill;
toOutput -= maxToFill;
return ret;
}
DOMDocument * TXFMSHA1::getDocument() {
return NULL;
}
DOMNode * TXFMSHA1::getFragmentNode() {
return NULL; // Return a null node
};
const XMLCh * TXFMSHA1::getFragmentId() {
return NULL; // Empty string
}
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