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/**
* XML Security Library (http://www.aleksey.com/xmlsec).
*
* Memory buffer transform
*
* This is free software; see Copyright file in the source
* distribution for preciese wording.
*
* Copyright (C) 2002-2003 Aleksey Sanin <aleksey@aleksey.com>
*/
#include "globals.h"
#include <stdlib.h>
#include <string.h>
#include <libxml/tree.h>
#include <xmlsec/xmlsec.h>
#include <xmlsec/buffer.h>
#include <xmlsec/keys.h>
#include <xmlsec/transforms.h>
#include <xmlsec/keys.h>
#include <xmlsec/base64.h>
#include <xmlsec/membuf.h>
#include <xmlsec/errors.h>
/*****************************************************************************
*
* Memory Buffer Transform
*
* xmlSecBuffer is located after xmlSecTransform
*
****************************************************************************/
#define xmlSecTransformMemBufSize \
(sizeof(xmlSecTransform) + sizeof(xmlSecBuffer))
#define xmlSecTransformMemBufGetBuf(transform) \
((xmlSecTransformCheckSize((transform), xmlSecTransformMemBufSize)) ? \
(xmlSecBufferPtr)(((xmlSecByte*)(transform)) + sizeof(xmlSecTransform)) : \
(xmlSecBufferPtr)NULL)
static int xmlSecTransformMemBufInitialize (xmlSecTransformPtr transform);
static void xmlSecTransformMemBufFinalize (xmlSecTransformPtr transform);
static int xmlSecTransformMemBufExecute (xmlSecTransformPtr transform,
int last,
xmlSecTransformCtxPtr transformCtx);
static xmlSecTransformKlass xmlSecTransformMemBufKlass = {
/* klass/object sizes */
sizeof(xmlSecTransformKlass), /* xmlSecSize klassSize */
xmlSecTransformMemBufSize, /* xmlSecSize objSize */
xmlSecNameMemBuf, /* const xmlChar* name; */
NULL, /* const xmlChar* href; */
0, /* xmlSecAlgorithmUsage usage; */
xmlSecTransformMemBufInitialize, /* xmlSecTransformInitializeMethod initialize; */
xmlSecTransformMemBufFinalize, /* xmlSecTransformFianlizeMethod finalize; */
NULL, /* xmlSecTransformNodeReadMethod readNode; */
NULL, /* xmlSecTransformNodeWriteMethod writeNode; */
NULL, /* xmlSecTransformSetKeyReqMethod setKeyReq; */
NULL, /* xmlSecTransformSetKeyMethod setKey; */
NULL, /* xmlSecTransformValidateMethod validate; */
xmlSecTransformDefaultGetDataType, /* xmlSecTransformGetDataTypeMethod getDataType; */
xmlSecTransformDefaultPushBin, /* xmlSecTransformPushBinMethod pushBin; */
xmlSecTransformDefaultPopBin, /* xmlSecTransformPopBinMethod popBin; */
NULL, /* xmlSecTransformPushXmlMethod pushXml; */
NULL, /* xmlSecTransformPopXmlMethod popXml; */
xmlSecTransformMemBufExecute, /* xmlSecTransformExecuteMethod execute; */
NULL, /* void* reserved0; */
NULL, /* void* reserved1; */
};
/**
* xmlSecTransformMemBufGetKlass:
*
* The memory buffer transorm (used to store the data that go through it).
*
* Returns: memory buffer transform klass.
*/
xmlSecTransformId
xmlSecTransformMemBufGetKlass(void) {
return(&xmlSecTransformMemBufKlass);
}
/**
* xmlSecTransformMemBufGetBuffer:
* @transform: the pointer to memory buffer transform.
*
* Gets the pointer to memory buffer transform buffer.
*
* Returns: pointer to the transform's #xmlSecBuffer.
*/
xmlSecBufferPtr
xmlSecTransformMemBufGetBuffer(xmlSecTransformPtr transform) {
xmlSecBufferPtr buffer;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecTransformMemBufId), NULL);
buffer = xmlSecTransformMemBufGetBuf(transform);
xmlSecAssert2(buffer != NULL, NULL);
return(buffer);
}
static int
xmlSecTransformMemBufInitialize(xmlSecTransformPtr transform) {
xmlSecBufferPtr buffer;
int ret;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecTransformMemBufId), -1);
buffer = xmlSecTransformMemBufGetBuf(transform);
xmlSecAssert2(buffer != NULL, -1);
ret = xmlSecBufferInitialize(buffer, 0);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferInitialize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return(-1);
}
return(0);
}
static void
xmlSecTransformMemBufFinalize(xmlSecTransformPtr transform) {
xmlSecBufferPtr buffer;
xmlSecAssert(xmlSecTransformCheckId(transform, xmlSecTransformMemBufId));
buffer = xmlSecTransformMemBufGetBuf(transform);
xmlSecAssert(buffer != NULL);
xmlSecBufferFinalize(xmlSecTransformMemBufGetBuf(transform));
}
static int
xmlSecTransformMemBufExecute(xmlSecTransformPtr transform, int last, xmlSecTransformCtxPtr transformCtx) {
xmlSecBufferPtr buffer;
xmlSecBufferPtr in, out;
xmlSecSize inSize;
int ret;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecTransformMemBufId), -1);
xmlSecAssert2(transformCtx != NULL, -1);
buffer = xmlSecTransformMemBufGetBuf(transform);
xmlSecAssert2(buffer != NULL, -1);
in = &(transform->inBuf);
out = &(transform->outBuf);
inSize = xmlSecBufferGetSize(in);
if(transform->status == xmlSecTransformStatusNone) {
transform->status = xmlSecTransformStatusWorking;
}
if(transform->status == xmlSecTransformStatusWorking) {
/* just copy everything from in to our buffer and out */
ret = xmlSecBufferAppend(buffer, xmlSecBufferGetData(in), inSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferAppend",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", inSize);
return(-1);
}
ret = xmlSecBufferAppend(out, xmlSecBufferGetData(in), inSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferAppend",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", inSize);
return(-1);
}
ret = xmlSecBufferRemoveHead(in, inSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferRemoveHead",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", inSize);
return(-1);
}
if(last != 0) {
transform->status = xmlSecTransformStatusFinished;
}
} else if(transform->status == xmlSecTransformStatusFinished) {
/* the only way we can get here is if there is no input */
xmlSecAssert2(inSize == 0, -1);
} else {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
NULL,
XMLSEC_ERRORS_R_INVALID_STATUS,
"status=%d", transform->status);
return(-1);
}
return(0);
}
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