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/**
*
* XMLSec library
*
* RSA Algorithms support
*
* This is free software; see Copyright file in the source
* distribution for preciese wording.
*
* Copyrigth (C) 2003 Cordys R&D BV, All rights reserved.
*/
#include "globals.h"
#ifndef XMLSEC_NO_RSA
#include <stdlib.h>
#include <string.h>
#include <libxml/tree.h>
#include <xmlsec/xmlsec.h>
#include <xmlsec/buffer.h>
#include <xmlsec/xmltree.h>
#include <xmlsec/keys.h>
#include <xmlsec/transforms.h>
#include <xmlsec/strings.h>
#include <xmlsec/errors.h>
#include <xmlsec/keyinfo.h>
#include <xmlsec/mscrypto/crypto.h>
#include <xmlsec/mscrypto/certkeys.h>
/**************************************************************************
*
* Internal MSCRYPTO RSA PKCS1 CTX
*
*************************************************************************/
typedef struct _xmlSecMSCryptoRsaPkcs1Ctx xmlSecMSCryptoRsaPkcs1Ctx,
*xmlSecMSCryptoRsaPkcs1CtxPtr;
struct _xmlSecMSCryptoRsaPkcs1Ctx {
xmlSecKeyDataPtr data;
DWORD typeFlags;
};
/*********************************************************************
*
* RSA PKCS1 key transport transform
*
* xmlSecMSCryptoRsaPkcs1Ctx is located after xmlSecTransform
*
********************************************************************/
#define xmlSecMSCryptoRsaPkcs1Size \
(sizeof(xmlSecTransform) + sizeof(xmlSecMSCryptoRsaPkcs1Ctx))
#define xmlSecMSCryptoRsaPkcs1GetCtx(transform) \
((xmlSecMSCryptoRsaPkcs1CtxPtr)(((xmlSecByte*)(transform)) + sizeof(xmlSecTransform)))
static int xmlSecMSCryptoRsaPkcs1Initialize (xmlSecTransformPtr transform);
static void xmlSecMSCryptoRsaPkcs1Finalize (xmlSecTransformPtr transform);
static int xmlSecMSCryptoRsaPkcs1SetKeyReq (xmlSecTransformPtr transform,
xmlSecKeyReqPtr keyReq);
static int xmlSecMSCryptoRsaPkcs1SetKey (xmlSecTransformPtr transform,
xmlSecKeyPtr key);
static int xmlSecMSCryptoRsaPkcs1Execute (xmlSecTransformPtr transform,
int last,
xmlSecTransformCtxPtr transformCtx);
static int xmlSecMSCryptoRsaPkcs1Process (xmlSecTransformPtr transform,
xmlSecTransformCtxPtr transformCtx);
static xmlSecTransformKlass xmlSecMSCryptoRsaPkcs1Klass = {
/* klass/object sizes */
sizeof(xmlSecTransformKlass), /* xmlSecSize klassSize */
xmlSecMSCryptoRsaPkcs1Size, /* xmlSecSize objSize */
xmlSecNameRsaPkcs1, /* const xmlChar* name; */
xmlSecHrefRsaPkcs1, /* const xmlChar* href; */
xmlSecTransformUsageEncryptionMethod, /* xmlSecAlgorithmUsage usage; */
xmlSecMSCryptoRsaPkcs1Initialize, /* xmlSecTransformInitializeMethod initialize; */
xmlSecMSCryptoRsaPkcs1Finalize, /* xmlSecTransformFinalizeMethod finalize; */
NULL, /* xmlSecTransformNodeReadMethod readNode; */
NULL, /* xmlSecTransformNodeWriteMethod writeNode; */
xmlSecMSCryptoRsaPkcs1SetKeyReq, /* xmlSecTransformSetKeyMethod setKeyReq; */
xmlSecMSCryptoRsaPkcs1SetKey, /* xmlSecTransformSetKeyMethod setKey; */
NULL, /* xmlSecTransformValidateMethod validate; */
xmlSecTransformDefaultGetDataType, /* xmlSecTransformGetDataTypeMethod getDataType; */
xmlSecTransformDefaultPushBin, /* xmlSecTransformPushBinMethod pushBin; */
xmlSecTransformDefaultPopBin, /* xmlSecTransformPopBinMethod popBin; */
NULL, /* xmlSecTransformPushXmlMethod pushXml; */
NULL, /* xmlSecTransformPopXmlMethod popXml; */
xmlSecMSCryptoRsaPkcs1Execute, /* xmlSecTransformExecuteMethod execute; */
NULL, /* void* reserved0; */
NULL, /* void* reserved1; */
};
/**
* xmlSecMSCryptoTransformRsaPkcs1GetKlass:
*
* The RSA-PKCS1 key transport transform klass.
*
* Returns: RSA-PKCS1 key transport transform klass.
*/
xmlSecTransformId
xmlSecMSCryptoTransformRsaPkcs1GetKlass(void) {
return(&xmlSecMSCryptoRsaPkcs1Klass);
}
static int
xmlSecMSCryptoRsaPkcs1Initialize(xmlSecTransformPtr transform) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id), -1);
xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size), -1);
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert2(ctx != NULL, -1);
memset(ctx, 0, sizeof(xmlSecMSCryptoRsaPkcs1Ctx));
return(0);
}
static void
xmlSecMSCryptoRsaPkcs1Finalize(xmlSecTransformPtr transform) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
xmlSecAssert(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id));
xmlSecAssert(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size));
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert(ctx != NULL);
if (ctx->data != NULL) {
xmlSecKeyDataDestroy(ctx->data);
ctx->data = NULL;
}
memset(ctx, 0, sizeof(xmlSecMSCryptoRsaPkcs1Ctx));
}
static int
xmlSecMSCryptoRsaPkcs1SetKeyReq(xmlSecTransformPtr transform, xmlSecKeyReqPtr keyReq) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id), -1);
xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1);
xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size), -1);
xmlSecAssert2(keyReq != NULL, -1);
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert2(ctx != NULL, -1);
keyReq->keyId = xmlSecMSCryptoKeyDataRsaId;
if(transform->operation == xmlSecTransformOperationEncrypt) {
keyReq->keyType = xmlSecKeyDataTypePublic;
keyReq->keyUsage = xmlSecKeyUsageEncrypt;
} else {
keyReq->keyType = xmlSecKeyDataTypePrivate;
keyReq->keyUsage = xmlSecKeyUsageDecrypt;
}
return(0);
}
static int
xmlSecMSCryptoRsaPkcs1SetKey(xmlSecTransformPtr transform, xmlSecKeyPtr key) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id), -1);
xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1);
xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size), -1);
xmlSecAssert2(key != NULL, -1);
xmlSecAssert2(xmlSecKeyDataCheckId(xmlSecKeyGetValue(key), xmlSecMSCryptoKeyDataRsaId), -1);
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert2(ctx != NULL, -1);
xmlSecAssert2(ctx->data == NULL, -1);
ctx->data = xmlSecKeyDataDuplicate(xmlSecKeyGetValue(key));
if(ctx->data == NULL) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecKeyDataDuplicate",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return(-1);
}
return(0);
}
static int
xmlSecMSCryptoRsaPkcs1Execute(xmlSecTransformPtr transform, int last, xmlSecTransformCtxPtr transformCtx) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
int ret;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id), -1);
xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1);
xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size), -1);
xmlSecAssert2(transformCtx != NULL, -1);
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert2(ctx != NULL, -1);
if(transform->status == xmlSecTransformStatusNone) {
transform->status = xmlSecTransformStatusWorking;
}
if((transform->status == xmlSecTransformStatusWorking) && (last == 0)) {
/* just do nothing */
} else if((transform->status == xmlSecTransformStatusWorking) && (last != 0)) {
ret = xmlSecMSCryptoRsaPkcs1Process(transform, transformCtx);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecMSCryptoRsaPkcs1Process",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return(-1);
}
transform->status = xmlSecTransformStatusFinished;
} else if(transform->status == xmlSecTransformStatusFinished) {
/* the only way we can get here is if there is no input */
xmlSecAssert2(xmlSecBufferGetSize(&(transform->inBuf)) == 0, -1);
} else {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
NULL,
XMLSEC_ERRORS_R_INVALID_STATUS,
"status=%d", transform->status);
return(-1);
}
return(0);
}
static int
xmlSecMSCryptoRsaPkcs1Process(xmlSecTransformPtr transform, xmlSecTransformCtxPtr transformCtx) {
xmlSecMSCryptoRsaPkcs1CtxPtr ctx;
xmlSecBufferPtr in, out;
xmlSecSize inSize, outSize;
xmlSecSize keySize;
int ret;
HCRYPTKEY hKey = 0;
DWORD dwInLen;
DWORD dwBufLen;
DWORD dwOutLen;
BYTE * outBuf;
BYTE * inBuf;
int i;
xmlSecAssert2(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id), -1);
xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1);
xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1Size), -1);
xmlSecAssert2(transformCtx != NULL, -1);
ctx = xmlSecMSCryptoRsaPkcs1GetCtx(transform);
xmlSecAssert2(ctx != NULL, -1);
xmlSecAssert2(ctx->data != NULL, -1);
keySize = xmlSecKeyDataGetSize(ctx->data) / 8;
xmlSecAssert2(keySize > 0, -1);
in = &(transform->inBuf);
out = &(transform->outBuf);
inSize = xmlSecBufferGetSize(in);
outSize = xmlSecBufferGetSize(out);
xmlSecAssert2(outSize == 0, -1);
/* the encoded size is equal to the keys size so we could not
* process more than that */
if((transform->operation == xmlSecTransformOperationEncrypt) && (inSize >= keySize)) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
NULL,
XMLSEC_ERRORS_R_INVALID_SIZE,
"%d when expected less than %d", inSize, keySize);
return(-1);
} else if((transform->operation == xmlSecTransformOperationDecrypt) && (inSize != keySize)) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
NULL,
XMLSEC_ERRORS_R_INVALID_SIZE,
"%d when expected %d", inSize, keySize);
return(-1);
}
outSize = keySize;
ret = xmlSecBufferSetMaxSize(out, outSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferSetMaxSize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", outSize);
return(-1);
}
if(transform->operation == xmlSecTransformOperationEncrypt) {
BYTE ch;
if(inSize > outSize) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
NULL,
XMLSEC_ERRORS_R_INVALID_SIZE,
"inSize=%d;outSize=%d",
inSize, outSize);
return(-1);
}
ret = xmlSecBufferSetData(out, xmlSecBufferGetData(in), inSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferSetData",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", inSize);
return(-1);
}
dwInLen = inSize;
dwBufLen = outSize;
if (0 == (hKey = xmlSecMSCryptoKeyDataGetKey(ctx->data, xmlSecKeyDataTypePublic))) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecMSCryptoKeyDataGetKey",
XMLSEC_ERRORS_R_CRYPTO_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return (-1);
}
outBuf = xmlSecBufferGetData(out);
xmlSecAssert2(outBuf != NULL, -1);
if (!CryptEncrypt(hKey, 0, TRUE, 0, outBuf, &dwInLen, dwBufLen)) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"CryptEncrypt",
XMLSEC_ERRORS_R_CRYPTO_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return (-1);
}
/* The output of CryptEncrypt is in little-endian format, so we have to convert to
* big-endian first.
*/
for(i = 0; i < outSize / 2; i++) {
ch = outBuf[i];
outBuf[i] = outBuf[outSize - (i + 1)];
outBuf[outSize - (i + 1)] = ch;
}
} else {
dwOutLen = inSize;
/* The input of CryptDecrypt is expected to be little-endian,
* so we have to convert from big-endian to little endian.
*/
inBuf = xmlSecBufferGetData(in);
outBuf = xmlSecBufferGetData(out);
xmlSecAssert2(inBuf != 0, -1);
xmlSecAssert2(outBuf != 0, -1);
for (i = 0; i < inSize; i++) {
outBuf[i] = inBuf[inSize - (i + 1)];
}
if (0 == (hKey = xmlSecMSCryptoKeyDataGetDecryptKey(ctx->data))) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecMSCryptoKeyDataGetKey",
XMLSEC_ERRORS_R_CRYPTO_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return (-1);
}
if (!CryptDecrypt(hKey, 0, TRUE, 0, outBuf, &dwOutLen)) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"CryptDecrypt",
XMLSEC_ERRORS_R_CRYPTO_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return(-1);
}
outSize = dwOutLen;
}
ret = xmlSecBufferSetSize(out, outSize);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),
"xmlSecBufferSetSize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", outSize);
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);
}
return(0);
}
#endif /* XMLSEC_NO_RSA */
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