diff options
Diffstat (limited to 'src/mscrypto/kt_rsa.c')
-rw-r--r-- | src/mscrypto/kt_rsa.c | 631 |
1 files changed, 631 insertions, 0 deletions
diff --git a/src/mscrypto/kt_rsa.c b/src/mscrypto/kt_rsa.c new file mode 100644 index 00000000..9b4908fa --- /dev/null +++ b/src/mscrypto/kt_rsa.c @@ -0,0 +1,631 @@ +/** + * + * XMLSec library + * + * RSA Algorithms support + * + * This is free software; see Copyright file in the source + * distribution for preciese wording. + * + * Copyright (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> +#include "private.h" + +/************************************************************************** + * + * Internal MSCRYPTO RSA PKCS1 CTX + * + *************************************************************************/ +typedef struct _xmlSecMSCryptoRsaPkcs1OaepCtx xmlSecMSCryptoRsaPkcs1OaepCtx, + *xmlSecMSCryptoRsaPkcs1OaepCtxPtr; +struct _xmlSecMSCryptoRsaPkcs1OaepCtx { + DWORD dwFlags; + xmlSecKeyDataPtr data; + xmlSecBuffer oaepParams; +}; + +/********************************************************************* + * + * RSA PKCS1 key transport transform + * + * xmlSecMSCryptoRsaPkcs1OaepCtx is located after xmlSecTransform + * + ********************************************************************/ +#define xmlSecMSCryptoRsaPkcs1OaepCtx \ + (sizeof(xmlSecTransform) + sizeof(xmlSecMSCryptoRsaPkcs1OaepCtx)) +#define xmlSecMSCryptoRsaPkcs1OaepGetCtx(transform) \ + ((xmlSecMSCryptoRsaPkcs1OaepCtxPtr)(((xmlSecByte*)(transform)) + sizeof(xmlSecTransform))) + +static int xmlSecMSCryptoRsaPkcs1OaepCheckId (xmlSecTransformPtr transform); +static int xmlSecMSCryptoRsaPkcs1OaepInitialize (xmlSecTransformPtr transform); +static void xmlSecMSCryptoRsaPkcs1OaepFinalize (xmlSecTransformPtr transform); +static int xmlSecMSCryptoRsaPkcs1OaepSetKeyReq (xmlSecTransformPtr transform, + xmlSecKeyReqPtr keyReq); +static int xmlSecMSCryptoRsaPkcs1OaepSetKey (xmlSecTransformPtr transform, + xmlSecKeyPtr key); +static int xmlSecMSCryptoRsaPkcs1OaepExecute (xmlSecTransformPtr transform, + int last, + xmlSecTransformCtxPtr transformCtx); +static int xmlSecMSCryptoRsaPkcs1OaepProcess (xmlSecTransformPtr transform, + xmlSecTransformCtxPtr transformCtx); + + +static int +xmlSecMSCryptoRsaPkcs1OaepCheckId(xmlSecTransformPtr transform) { + + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id)) { + return(1); + } else + + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaOaepId)) { + return(1); + } else + + /* not found */ + { + return(0); + } + + /* just in case */ + return(0); +} + +static int +xmlSecMSCryptoRsaPkcs1OaepInitialize(xmlSecTransformPtr transform) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + int ret; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(transform); + xmlSecAssert2(ctx != NULL, -1); + + /* initialize */ + memset(ctx, 0, sizeof(xmlSecMSCryptoRsaPkcs1OaepCtx)); + + ret = xmlSecBufferInitialize(&(ctx->oaepParams), 0); + if(ret < 0) { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + "xmlSecBufferInitialize", + XMLSEC_ERRORS_R_XMLSEC_FAILED, + XMLSEC_ERRORS_NO_MESSAGE); + return(-1); + } + + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaPkcs1Id)) { + ctx->dwFlags = 0; + } else + + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaOaepId)) { + ctx->dwFlags = CRYPT_OAEP; + } else + + /* not found */ + { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + NULL, + XMLSEC_ERRORS_R_INVALID_TRANSFORM, + XMLSEC_ERRORS_NO_MESSAGE); + return(-1); + } + + /* done */ + return(0); +} + +static void +xmlSecMSCryptoRsaPkcs1OaepFinalize(xmlSecTransformPtr transform) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + + xmlSecAssert(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform)); + xmlSecAssert(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx)); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(transform); + xmlSecAssert(ctx != NULL); + + if (ctx->data != NULL) { + xmlSecKeyDataDestroy(ctx->data); + ctx->data = NULL; + } + + xmlSecBufferFinalize(&(ctx->oaepParams)); + memset(ctx, 0, sizeof(xmlSecMSCryptoRsaPkcs1OaepCtx)); +} + +static int +xmlSecMSCryptoRsaPkcs1OaepSetKeyReq(xmlSecTransformPtr transform, xmlSecKeyReqPtr keyReq) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + xmlSecAssert2(keyReq != NULL, -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(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 +xmlSecMSCryptoRsaPkcs1OaepSetKey(xmlSecTransformPtr transform, xmlSecKeyPtr key) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + xmlSecAssert2(key != NULL, -1); + xmlSecAssert2(xmlSecKeyDataCheckId(xmlSecKeyGetValue(key), xmlSecMSCryptoKeyDataRsaId), -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(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 +xmlSecMSCryptoRsaPkcs1OaepExecute(xmlSecTransformPtr transform, int last, xmlSecTransformCtxPtr transformCtx) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + int ret; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + xmlSecAssert2(transformCtx != NULL, -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(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 = xmlSecMSCryptoRsaPkcs1OaepProcess(transform, transformCtx); + if(ret < 0) { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + "xmlSecMSCryptoRsaPkcs1OaepProcess", + 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 +xmlSecMSCryptoRsaPkcs1OaepProcess(xmlSecTransformPtr transform, xmlSecTransformCtxPtr transformCtx) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + xmlSecBufferPtr in, out; + xmlSecSize inSize, outSize; + xmlSecSize keySize; + int ret; + HCRYPTKEY hKey = 0; + DWORD dwInLen; + DWORD dwBufLen; + DWORD dwOutLen; + xmlSecByte * outBuf; + xmlSecByte * inBuf; + int i; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2((transform->operation == xmlSecTransformOperationEncrypt) || (transform->operation == xmlSecTransformOperationDecrypt), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + xmlSecAssert2(transformCtx != NULL, -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(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) { + 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); + + /* set OAEP parameter for the key + * + * aleksey: I don't understand how this would work in multi-threaded + * environment or when key can be re-used multiple times + */ + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaOaepId) && xmlSecBufferGetSize(&(ctx->oaepParams)) > 0) { + CRYPT_DATA_BLOB oaepParams; + + memset(&oaepParams, 0, sizeof(oaepParams)); + oaepParams.pbData = xmlSecBufferGetData(&(ctx->oaepParams)); + oaepParams.cbData = xmlSecBufferGetSize(&(ctx->oaepParams)); + + if (!CryptSetKeyParam(hKey, KP_OAEP_PARAMS, (const BYTE*)&oaepParams, 0)) { + xmlSecError(XMLSEC_ERRORS_HERE, + NULL, + "CryptSetKeyParam", + XMLSEC_ERRORS_R_CRYPTO_FAILED, + XMLSEC_ERRORS_NO_MESSAGE); + return (-1); + } + } + + /* encrypt */ + if (!CryptEncrypt(hKey, 0, TRUE, ctx->dwFlags, 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. + */ + ConvertEndianInPlace(outBuf, outSize); + } 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); + ConvertEndian(inBuf, outBuf, inSize); + + if (0 == (hKey = xmlSecMSCryptoKeyDataGetDecryptKey(ctx->data))) { + xmlSecError(XMLSEC_ERRORS_HERE, + NULL, + "xmlSecMSCryptoKeyDataGetKey", + XMLSEC_ERRORS_R_CRYPTO_FAILED, + XMLSEC_ERRORS_NO_MESSAGE); + return (-1); + } + + /* set OAEP parameter for the key + * + * aleksey: I don't understand how this would work in multi-threaded + * environment or when key can be re-used multiple times + */ + if(xmlSecTransformCheckId(transform, xmlSecMSCryptoTransformRsaOaepId) && xmlSecBufferGetSize(&(ctx->oaepParams)) > 0) { + CRYPT_DATA_BLOB oaepParams; + + memset(&oaepParams, 0, sizeof(oaepParams)); + oaepParams.pbData = xmlSecBufferGetData(&(ctx->oaepParams)); + oaepParams.cbData = xmlSecBufferGetSize(&(ctx->oaepParams)); + + if (!CryptSetKeyParam(hKey, KP_OAEP_PARAMS, (const BYTE*)&oaepParams, 0)) { + xmlSecError(XMLSEC_ERRORS_HERE, + NULL, + "CryptSetKeyParam", + XMLSEC_ERRORS_R_CRYPTO_FAILED, + XMLSEC_ERRORS_NO_MESSAGE); + return (-1); + } + } + + /* decrypt */ + if (!CryptDecrypt(hKey, 0, TRUE, ctx->dwFlags, 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); +} + + +/********************************************************************** + * + * RSA/PKCS1 transform + * + **********************************************************************/ +static xmlSecTransformKlass xmlSecMSCryptoRsaPkcs1Klass = { + /* klass/object sizes */ + sizeof(xmlSecTransformKlass), /* xmlSecSize klassSize */ + xmlSecMSCryptoRsaPkcs1OaepCtx, /* xmlSecSize objSize */ + + xmlSecNameRsaPkcs1, /* const xmlChar* name; */ + xmlSecHrefRsaPkcs1, /* const xmlChar* href; */ + xmlSecTransformUsageEncryptionMethod, /* xmlSecAlgorithmUsage usage; */ + + xmlSecMSCryptoRsaPkcs1OaepInitialize, /* xmlSecTransformInitializeMethod initialize; */ + xmlSecMSCryptoRsaPkcs1OaepFinalize, /* xmlSecTransformFinalizeMethod finalize; */ + NULL, /* xmlSecTransformNodeReadMethod readNode; */ + NULL, /* xmlSecTransformNodeWriteMethod writeNode; */ + xmlSecMSCryptoRsaPkcs1OaepSetKeyReq, /* xmlSecTransformSetKeyMethod setKeyReq; */ + xmlSecMSCryptoRsaPkcs1OaepSetKey, /* xmlSecTransformSetKeyMethod setKey; */ + NULL, /* xmlSecTransformValidateMethod validate; */ + xmlSecTransformDefaultGetDataType, /* xmlSecTransformGetDataTypeMethod getDataType; */ + xmlSecTransformDefaultPushBin, /* xmlSecTransformPushBinMethod pushBin; */ + xmlSecTransformDefaultPopBin, /* xmlSecTransformPopBinMethod popBin; */ + NULL, /* xmlSecTransformPushXmlMethod pushXml; */ + NULL, /* xmlSecTransformPopXmlMethod popXml; */ + xmlSecMSCryptoRsaPkcs1OaepExecute, /* 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); +} + + + +/********************************************************************** + * + * RSA/OAEP transform + * + **********************************************************************/ +static int xmlSecMSCryptoRsaOaepNodeRead (xmlSecTransformPtr transform, + xmlNodePtr node, + xmlSecTransformCtxPtr transformCtx); + +static xmlSecTransformKlass xmlSecMSCryptoRsaOaepKlass = { + /* klass/object sizes */ + sizeof(xmlSecTransformKlass), /* xmlSecSize klassSize */ + xmlSecMSCryptoRsaPkcs1OaepCtx, /* xmlSecSize objSize */ + + xmlSecNameRsaOaep, /* const xmlChar* name; */ + xmlSecHrefRsaOaep, /* const xmlChar* href; */ + xmlSecTransformUsageEncryptionMethod, /* xmlSecAlgorithmUsage usage; */ + + xmlSecMSCryptoRsaPkcs1OaepInitialize, /* xmlSecTransformInitializeMethod initialize; */ + xmlSecMSCryptoRsaPkcs1OaepFinalize, /* xmlSecTransformFinalizeMethod finalize; */ + xmlSecMSCryptoRsaOaepNodeRead, /* xmlSecTransformNodeReadMethod readNode; */ + NULL, /* xmlSecTransformNodeWriteMethod writeNode; */ + xmlSecMSCryptoRsaPkcs1OaepSetKeyReq, /* xmlSecTransformSetKeyMethod setKeyReq; */ + xmlSecMSCryptoRsaPkcs1OaepSetKey, /* xmlSecTransformSetKeyMethod setKey; */ + NULL, /* xmlSecTransformValidateMethod validate; */ + xmlSecTransformDefaultGetDataType, /* xmlSecTransformGetDataTypeMethod getDataType; */ + xmlSecTransformDefaultPushBin, /* xmlSecTransformPushBinMethod pushBin; */ + xmlSecTransformDefaultPopBin, /* xmlSecTransformPopBinMethod popBin; */ + NULL, /* xmlSecTransformPushXmlMethod pushXml; */ + NULL, /* xmlSecTransformPopXmlMethod popXml; */ + xmlSecMSCryptoRsaPkcs1OaepExecute, /* xmlSecTransformExecuteMethod execute; */ + + NULL, /* void* reserved0; */ + NULL, /* void* reserved1; */ +}; + + +/** + * xmlSecMSCryptoTransformRsaOaepGetKlass: + * + * The RSA-OAEP key transport transform klass. + * + * Returns: RSA-OAEP key transport transform klass. + */ +xmlSecTransformId +xmlSecMSCryptoTransformRsaOaepGetKlass(void) { + return(&xmlSecMSCryptoRsaOaepKlass); +} + +static int +xmlSecMSCryptoRsaOaepNodeRead(xmlSecTransformPtr transform, xmlNodePtr node, xmlSecTransformCtxPtr transformCtx) { + xmlSecMSCryptoRsaPkcs1OaepCtxPtr ctx; + xmlNodePtr cur; + int ret; + + xmlSecAssert2(xmlSecMSCryptoRsaPkcs1OaepCheckId(transform), -1); + xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecMSCryptoRsaPkcs1OaepCtx), -1); + xmlSecAssert2(node != NULL, -1); + xmlSecAssert2(transformCtx != NULL, -1); + + ctx = xmlSecMSCryptoRsaPkcs1OaepGetCtx(transform); + xmlSecAssert2(ctx != NULL, -1); + xmlSecAssert2(xmlSecBufferGetSize(&(ctx->oaepParams)) == 0, -1); + + cur = xmlSecGetNextElementNode(node->children); + while(cur != NULL) { + if(xmlSecCheckNodeName(cur, xmlSecNodeRsaOAEPparams, xmlSecEncNs)) { + ret = xmlSecBufferBase64NodeContentRead(&(ctx->oaepParams), cur); + if(ret < 0) { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + "xmlSecBufferBase64NodeContentRead", + XMLSEC_ERRORS_R_XMLSEC_FAILED, + XMLSEC_ERRORS_NO_MESSAGE); + return(-1); + } + } else if(xmlSecCheckNodeName(cur, xmlSecNodeDigestMethod, xmlSecDSigNs)) { + xmlChar* algorithm; + + /* Algorithm attribute is required */ + algorithm = xmlGetProp(cur, xmlSecAttrAlgorithm); + if(algorithm == NULL) { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + xmlSecErrorsSafeString(xmlSecAttrAlgorithm), + XMLSEC_ERRORS_R_INVALID_NODE_ATTRIBUTE, + "node=%s", + xmlSecErrorsSafeString(xmlSecNodeGetName(cur))); + return(-1); + } + + /* for now we support only sha1 */ + if(xmlStrcmp(algorithm, xmlSecHrefSha1) != 0) { + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + xmlSecErrorsSafeString(algorithm), + XMLSEC_ERRORS_R_INVALID_TRANSFORM, + "digest algorithm is not supported for rsa/oaep"); + xmlFree(algorithm); + return(-1); + } + xmlFree(algorithm); + } else { + /* not found */ + xmlSecError(XMLSEC_ERRORS_HERE, + xmlSecErrorsSafeString(xmlSecTransformGetName(transform)), + xmlSecErrorsSafeString(xmlSecNodeGetName(cur)), + XMLSEC_ERRORS_R_UNEXPECTED_NODE, + XMLSEC_ERRORS_NO_MESSAGE); + return(-1); + } + + /* next node */ + cur = xmlSecGetNextElementNode(cur->next); + } + + return(0); +} + +#endif /* XMLSEC_NO_RSA */ + |