/** 
 * XMLSec library
 * 
 * MSCrypto keys store that uses Simple Keys Store under the hood. Uses the
 * MS Certificate store as a backing store for the finding keys, but the 
 * MS Certificate store not written to by the keys store.
 * So, if store->findkey is done and the key is not found in the simple
 * keys store, the MS Certificate store is looked up.
 * Thus, the MS Certificate store can be used to pre-load keys and becomes 
 * an alternate source of keys for xmlsec
 * 
 * This is free software; see Copyright file in the source
 * distribution for precise wording.
 * 
 * Copyrigth (C) 2003 Cordys R&D BV, All rights reserved.
 * Copyright (C) 2003 Aleksey Sanin <aleksey@aleksey.com>
 */
#include "globals.h"

#include <stdlib.h>
#include <string.h>

#include <windows.h>
#include <wincrypt.h>

#include <libxml/tree.h> 

#include <xmlsec/xmlsec.h>
#include <xmlsec/buffer.h>
#include <xmlsec/base64.h>
#include <xmlsec/errors.h>
#include <xmlsec/xmltree.h>

#include <xmlsec/keysmngr.h>

#include <xmlsec/mscrypto/app.h>
#include <xmlsec/mscrypto/crypto.h>
#include <xmlsec/mscrypto/keysstore.h>
#include <xmlsec/mscrypto/x509.h>
#include <xmlsec/mscrypto/certkeys.h>

#if defined(__MINGW32__)
#  include "xmlsec-mingw.h"
#endif

#define XMLSEC_MSCRYPTO_APP_DEFAULT_CERT_STORE_NAME	"MY"

/****************************************************************************
 *
 * MSCrypto Keys Store. Uses Simple Keys Store under the hood
 * 
 * Simple Keys Store ptr is located after xmlSecKeyStore
 *
 ***************************************************************************/
#define xmlSecMSCryptoKeysStoreSize \
	(sizeof(xmlSecKeyStore) + sizeof(xmlSecKeyStorePtr))

#define xmlSecMSCryptoKeysStoreGetSS(store) \
    ((xmlSecKeyStoreCheckSize((store), xmlSecMSCryptoKeysStoreSize)) ? \
     (xmlSecKeyStorePtr*)(((xmlSecByte*)(store)) + sizeof(xmlSecKeyStore)) : \
     (xmlSecKeyStorePtr*)NULL)

static int			xmlSecMSCryptoKeysStoreInitialize   (xmlSecKeyStorePtr store);
static void			xmlSecMSCryptoKeysStoreFinalize	    (xmlSecKeyStorePtr store);
static xmlSecKeyPtr 		xmlSecMSCryptoKeysStoreFindKey	    (xmlSecKeyStorePtr store, 
								     const xmlChar* name, 
								     xmlSecKeyInfoCtxPtr keyInfoCtx);

static xmlSecKeyStoreKlass xmlSecMSCryptoKeysStoreKlass = {
    sizeof(xmlSecKeyStoreKlass),
    xmlSecMSCryptoKeysStoreSize,

    /* data */
    BAD_CAST "MSCrypto-keys-store",		/* const xmlChar* name; */ 
        
    /* constructors/destructor */
    xmlSecMSCryptoKeysStoreInitialize,		/* xmlSecKeyStoreInitializeMethod initialize; */
    xmlSecMSCryptoKeysStoreFinalize,		/* xmlSecKeyStoreFinalizeMethod finalize; */
    xmlSecMSCryptoKeysStoreFindKey,		/* xmlSecKeyStoreFindKeyMethod findKey; */

    /* reserved for the future */
    NULL,					/* void* reserved0; */
    NULL,					/* void* reserved1; */
};

/**
 * xmlSecMSCryptoKeysStoreGetKlass:
 * 
 * The MSCrypto list based keys store klass.
 *
 * Returns: MSCrypto list based keys store klass.
 */
xmlSecKeyStoreId 
xmlSecMSCryptoKeysStoreGetKlass(void) {
    return(&xmlSecMSCryptoKeysStoreKlass);
}

/**
 * xmlSecMSCryptoKeysStoreAdoptKey:
 * @store:		the pointer to MSCrypto keys store.
 * @key:		the pointer to key.
 * 
 * Adds @key to the @store. 
 *
 * Returns: 0 on success or a negative value if an error occurs.
 */
int 
xmlSecMSCryptoKeysStoreAdoptKey(xmlSecKeyStorePtr store, xmlSecKeyPtr key) {
    xmlSecKeyStorePtr *ss;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), -1);
    xmlSecAssert2((key != NULL), -1);

    ss = xmlSecMSCryptoKeysStoreGetSS(store);
    xmlSecAssert2(((ss != NULL) && (*ss != NULL) && 
	(xmlSecKeyStoreCheckId(*ss, xmlSecSimpleKeysStoreId))), -1);

    return (xmlSecSimpleKeysStoreAdoptKey(*ss, key));
}

/** 
 * xmlSecMSCryptoKeysStoreLoad:
 * @store:		the pointer to MSCrypto keys store.
 * @uri:		the filename.
 * @keysMngr:		the pointer to associated keys manager. 
 * 
 * Reads keys from an XML file.
 *
 * Returns: 0 on success or a negative value if an error occurs.
 */
int
xmlSecMSCryptoKeysStoreLoad(xmlSecKeyStorePtr store, const char *uri, 
			    xmlSecKeysMngrPtr keysMngr) {
    xmlDocPtr doc;
    xmlNodePtr root;
    xmlNodePtr cur;
    xmlSecKeyPtr key;
    xmlSecKeyInfoCtx keyInfoCtx;
    int ret;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), -1);
    xmlSecAssert2((uri != NULL), -1);    

    doc = xmlParseFile(uri);
    if(doc == NULL) {
	xmlSecError(XMLSEC_ERRORS_HERE,
		    xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
		    "xmlParseFile",
		    XMLSEC_ERRORS_R_XML_FAILED,
		    "uri=%s", 
		    xmlSecErrorsSafeString(uri));
	return(-1);
    }
    
    root = xmlDocGetRootElement(doc);
    if(!xmlSecCheckNodeName(root, BAD_CAST "Keys", xmlSecNs)) {
	xmlSecError(XMLSEC_ERRORS_HERE,
		    xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
		    xmlSecErrorsSafeString(xmlSecNodeGetName(root)),
		    XMLSEC_ERRORS_R_INVALID_NODE,
		    "expected-node=<xmlsec:Keys>");
	xmlFreeDoc(doc);
	return(-1);
    }
        
    cur = xmlSecGetNextElementNode(root->children);
    while((cur != NULL) && xmlSecCheckNodeName(cur, xmlSecNodeKeyInfo, xmlSecDSigNs)) {  
	key = xmlSecKeyCreate();
	if(key == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			xmlSecErrorsSafeString(xmlSecNodeGetName(cur)),
			XMLSEC_ERRORS_R_INVALID_NODE,
			"expected-node=%s",
			xmlSecErrorsSafeString(xmlSecNodeKeyInfo));
	    xmlFreeDoc(doc);
	    return(-1);
	}

	ret = xmlSecKeyInfoCtxInitialize(&keyInfoCtx, NULL);
	if(ret < 0) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
		        xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			"xmlSecKeyInfoCtxInitialize",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			XMLSEC_ERRORS_NO_MESSAGE);
	    xmlSecKeyDestroy(key);
	    xmlFreeDoc(doc);
	    return(-1);
	}
	
	keyInfoCtx.mode 	  = xmlSecKeyInfoModeRead;
	keyInfoCtx.keysMngr	  = keysMngr;
	keyInfoCtx.flags 	  = XMLSEC_KEYINFO_FLAGS_DONT_STOP_ON_KEY_FOUND |
				    XMLSEC_KEYINFO_FLAGS_X509DATA_DONT_VERIFY_CERTS;
        keyInfoCtx.keyReq.keyId	  = xmlSecKeyDataIdUnknown;
	keyInfoCtx.keyReq.keyType = xmlSecKeyDataTypeAny;
	keyInfoCtx.keyReq.keyUsage= xmlSecKeyDataUsageAny;

	ret = xmlSecKeyInfoNodeRead(cur, key, &keyInfoCtx);
	if(ret < 0) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			"xmlSecKeyInfoNodeRead",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			XMLSEC_ERRORS_NO_MESSAGE);
	    xmlSecKeyInfoCtxFinalize(&keyInfoCtx);
	    xmlSecKeyDestroy(key);
	    xmlFreeDoc(doc);
	    return(-1);
	}
	xmlSecKeyInfoCtxFinalize(&keyInfoCtx);
	
	if(xmlSecKeyIsValid(key)) {
    	    ret = xmlSecMSCryptoKeysStoreAdoptKey(store, key);
	    if(ret < 0) {
		xmlSecError(XMLSEC_ERRORS_HERE,
			    xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			    "xmlSecMSCryptoKeysStoreAdoptKey",
			    XMLSEC_ERRORS_R_XMLSEC_FAILED,
			    XMLSEC_ERRORS_NO_MESSAGE);
		xmlSecKeyDestroy(key);
		xmlFreeDoc(doc);
		return(-1);
	    }
	} else {
	    /* we have an unknown key in our file, just ignore it */
	    xmlSecKeyDestroy(key);
	}
        cur = xmlSecGetNextElementNode(cur->next);
    }
    
    if(cur != NULL) {
	xmlSecError(XMLSEC_ERRORS_HERE,
		    xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
		    xmlSecErrorsSafeString(xmlSecNodeGetName(cur)),
		    XMLSEC_ERRORS_R_UNEXPECTED_NODE,
		    XMLSEC_ERRORS_NO_MESSAGE);
	xmlFreeDoc(doc);
	return(-1);	    
    }
    
    xmlFreeDoc(doc);
    return(0);
}

/** 
 * xmlSecMSCryptoKeysStoreSave:
 * @store:		the pointer to MSCrypto keys store.
 * @filename:		the filename.
 * @type:		the saved keys type (public, private, ...).
 * 
 * Writes keys from @store to an XML file.
 *
 * Returns: 0 on success or a negative value if an error occurs.
 */
int
xmlSecMSCryptoKeysStoreSave(xmlSecKeyStorePtr store, const char *filename, xmlSecKeyDataType type) {
    xmlSecKeyStorePtr *ss;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), -1);
    xmlSecAssert2((filename != NULL), -1);    
    
    ss = xmlSecMSCryptoKeysStoreGetSS(store);
    xmlSecAssert2(((ss != NULL) && (*ss != NULL) && 
		   (xmlSecKeyStoreCheckId(*ss, xmlSecSimpleKeysStoreId))), -1);

    return (xmlSecSimpleKeysStoreSave(*ss, filename, type));
}

static int
xmlSecMSCryptoKeysStoreInitialize(xmlSecKeyStorePtr store) {
    xmlSecKeyStorePtr *ss;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), -1);

    ss = xmlSecMSCryptoKeysStoreGetSS(store);
    xmlSecAssert2((*ss == NULL), -1);

    *ss = xmlSecKeyStoreCreate(xmlSecSimpleKeysStoreId);
    if(*ss == NULL) {
	xmlSecError(XMLSEC_ERRORS_HERE,
		    xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
		    "xmlSecKeyStoreCreate",
		    XMLSEC_ERRORS_R_XMLSEC_FAILED,
		    "xmlSecSimpleKeysStoreId");
	return(-1);
    }

    return(0);    
}

static void
xmlSecMSCryptoKeysStoreFinalize(xmlSecKeyStorePtr store) {
    xmlSecKeyStorePtr *ss;
    
    xmlSecAssert(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId));
    
    ss = xmlSecMSCryptoKeysStoreGetSS(store);
    xmlSecAssert((ss != NULL) && (*ss != NULL));
    
    xmlSecKeyStoreDestroy(*ss);
}

static PCCERT_CONTEXT
xmlSecMSCryptoKeysStoreFindCert(xmlSecKeyStorePtr store, const xmlChar* name, 
			       xmlSecKeyInfoCtxPtr keyInfoCtx) {
    const char* storeName;
    HCERTSTORE hStoreHandle = NULL;
    PCCERT_CONTEXT pCertContext = NULL;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), NULL);
    xmlSecAssert2(name != NULL, NULL);
    xmlSecAssert2(keyInfoCtx != NULL, NULL);

    storeName = xmlSecMSCryptoAppGetCertStoreName();
    if(storeName == NULL) {
	storeName = XMLSEC_MSCRYPTO_APP_DEFAULT_CERT_STORE_NAME;
    }

    hStoreHandle = CertOpenSystemStore(0, storeName);
    if (NULL == hStoreHandle) {
	xmlSecError(XMLSEC_ERRORS_HERE,
		    NULL,
		    "CertOpenSystemStore",
		    XMLSEC_ERRORS_R_CRYPTO_FAILED,
		    "storeName=%s",
		    xmlSecErrorsSafeString(storeName));
	return(NULL);
    }

    /* first attempt: search by cert id == name */
    if(pCertContext == NULL) {
	size_t len = xmlStrlen(name) + 1;     
	wchar_t * lpCertID;
	
	/* aleksey todo: shouldn't we call MultiByteToWideChar first to get the buffer size? */
	lpCertID = (wchar_t *)xmlMalloc(sizeof(wchar_t) * len);
	if(lpCertID == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			NULL,
			XMLSEC_ERRORS_R_MALLOC_FAILED,
		    	XMLSEC_ERRORS_NO_MESSAGE);
	    CertCloseStore(hStoreHandle, 0);
	    return(NULL);
	}
	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, lpCertID, len);
	
	pCertContext = CertFindCertificateInStore(
	    hStoreHandle,
	    X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
	    0,
	    CERT_FIND_SUBJECT_STR,
	    lpCertID,
	    NULL);
	xmlFree(lpCertID);
    }

    /* We don't give up easily, now try to fetch the cert with a full blown 
     * subject dn
     */
    if (NULL == pCertContext) {
	BYTE* bdata;
	DWORD len;
	
	bdata = xmlSecMSCryptoCertStrToName(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
					    name, 
					    CERT_OID_NAME_STR,
					    &len);
	if(bdata != NULL) {
	    CERT_NAME_BLOB cnb;
    
	    cnb.cbData = len;
    	    cnb.pbData = bdata;
	    
	    pCertContext = CertFindCertificateInStore(hStoreHandle,
				X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
				0,
				CERT_FIND_SUBJECT_NAME,
				&cnb,
				NULL);
	    xmlFree(bdata);
	}
    }
	    
    /* We don't give up easily, now try to fetch the cert with a full blown 
     * subject dn, and try with a reversed dn
     */
    if (NULL == pCertContext) {
	BYTE* bdata;
	DWORD len;
	
	bdata = xmlSecMSCryptoCertStrToName(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
					    name, 
					    CERT_OID_NAME_STR | CERT_NAME_STR_REVERSE_FLAG,
					    &len);
	if(bdata != NULL) {
	    CERT_NAME_BLOB cnb;
    
	    cnb.cbData = len;
    	    cnb.pbData = bdata;
	    
	    pCertContext = CertFindCertificateInStore(hStoreHandle,
				X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
				0,
				CERT_FIND_SUBJECT_NAME,
				&cnb,
				NULL);
	    xmlFree(bdata);
	}
    }

    /*
     * Try ro find certificate with name="Friendly Name"
     */
    if (NULL == pCertContext) {
      DWORD dwPropSize;
      PBYTE pbFriendlyName;
      PCCERT_CONTEXT pCertCtxIter = NULL;
      size_t len = xmlStrlen(name) + 1;     
      wchar_t * lpFName;
	
      lpFName = (wchar_t *)xmlMalloc(sizeof(wchar_t) * len);
      if(lpFName == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			NULL,
			XMLSEC_ERRORS_R_MALLOC_FAILED,
		    	XMLSEC_ERRORS_NO_MESSAGE);
	    CertCloseStore(hStoreHandle, 0);
	    return(NULL);
      }
      MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, lpFName, len);
      
      while (pCertCtxIter = CertEnumCertificatesInStore(hStoreHandle, pCertCtxIter)) {
	if (TRUE != CertGetCertificateContextProperty(pCertCtxIter,
						      CERT_FRIENDLY_NAME_PROP_ID,
						      NULL,
						      &dwPropSize)) {
	  continue;
	}

	pbFriendlyName = xmlMalloc(dwPropSize);
	if(pbFriendlyName == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			NULL,
			XMLSEC_ERRORS_R_MALLOC_FAILED,
		    	XMLSEC_ERRORS_NO_MESSAGE);
	    xmlFree(lpFName);
	    CertCloseStore(hStoreHandle, 0);
	    return(NULL);
	}
	if (TRUE != CertGetCertificateContextProperty(pCertCtxIter,
						      CERT_FRIENDLY_NAME_PROP_ID,
						      pbFriendlyName,
						      &dwPropSize)) {
	  xmlFree(pbFriendlyName);
	  continue;
	}

	/* Compare FriendlyName to name */
	if (!wcscmp(lpFName, (const wchar_t *)pbFriendlyName)) {
	  pCertContext = pCertCtxIter;
	  xmlFree(pbFriendlyName);
	  break;
	}
	xmlFree(pbFriendlyName);
      }

      xmlFree(lpFName);
    }

    /* We could do the following here: 
     * It would be nice if we could locate the cert with issuer name and
     * serial number, the given keyname can be something like this:
     * 'serial=1234567;issuer=CN=ikke, C=NL'
     * to be implemented by the first person who reads this, and thinks it's
     * a good idea :) WK
     */     

    /* OK, I give up, I'm gone :( */
    
    /* aleksey todo: is it a right idea to close store if we have a handle to 
     * a cert in this store? */
    CertCloseStore(hStoreHandle, 0);
    return(pCertContext);
}


static xmlSecKeyPtr 
xmlSecMSCryptoKeysStoreFindKey(xmlSecKeyStorePtr store, const xmlChar* name, 
			       xmlSecKeyInfoCtxPtr keyInfoCtx) {
    xmlSecKeyStorePtr* ss;
    xmlSecKeyPtr key = NULL;
    xmlSecKeyReqPtr keyReq = NULL;
    PCCERT_CONTEXT pCertContext = NULL;
    PCCERT_CONTEXT pCertContext2 = NULL;
    xmlSecKeyDataPtr data = NULL;
    xmlSecKeyDataPtr x509Data = NULL;
    xmlSecKeyPtr res = NULL;
    int ret;

    xmlSecAssert2(xmlSecKeyStoreCheckId(store, xmlSecMSCryptoKeysStoreId), NULL);
    xmlSecAssert2(keyInfoCtx != NULL, NULL);

    ss = xmlSecMSCryptoKeysStoreGetSS(store);
    xmlSecAssert2(((ss != NULL) && (*ss != NULL)), NULL);

    /* first try to find key in the simple keys store */
    key = xmlSecKeyStoreFindKey(*ss, name, keyInfoCtx);
    if (key != NULL) {
	return (key);
    }

    /* Next try to find the key in the MS Certificate store, and construct an xmlSecKey.
    *  we must have a name to lookup keys in the certificate store.
    */
    if (name == NULL) {
	goto done;
    }

    /* what type of key are we looking for? 
    * WK: For now, we'll look only for public/private keys using the
    * name as a cert nickname. Then the name is regarded as the subject 
    * dn of the certificate to be searched for.
    */
    keyReq = &(keyInfoCtx->keyReq);
    if (keyReq->keyType & (xmlSecKeyDataTypePublic | xmlSecKeyDataTypePrivate)) {
	pCertContext = xmlSecMSCryptoKeysStoreFindCert(store, name, keyInfoCtx);
	if(pCertContext == NULL) {
	    goto done;
	}

	/* set cert in x509 data */
	x509Data = xmlSecKeyDataCreate(xmlSecMSCryptoKeyDataX509Id);
	if(x509Data == NULL) {
 	    xmlSecError(XMLSEC_ERRORS_HERE,
 			NULL,
			"xmlSecKeyDataCreate",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
 	    goto done;
 	}

	pCertContext2 = CertDuplicateCertificateContext(pCertContext);
	if (NULL == pCertContext2) {
 	    xmlSecError(XMLSEC_ERRORS_HERE,
 			NULL,
			"CertDuplicateCertificateContext",
 			XMLSEC_ERRORS_R_CRYPTO_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
 	    goto done;
 	}

	ret = xmlSecMSCryptoKeyDataX509AdoptCert(x509Data, pCertContext2);
	if (ret < 0) {
 	    xmlSecError(XMLSEC_ERRORS_HERE,
 			NULL,
			"xmlSecMSCryptoKeyDataX509AdoptCert",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
	    goto done;
	}
	pCertContext2 = NULL;

	pCertContext2 = CertDuplicateCertificateContext(pCertContext);
	if (NULL == pCertContext2) {
 	    xmlSecError(XMLSEC_ERRORS_HERE,
 			NULL,
			"CertDuplicateCertificateContext",
 			XMLSEC_ERRORS_R_CRYPTO_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
 	    goto done;
 	}

	ret = xmlSecMSCryptoKeyDataX509AdoptKeyCert(x509Data, pCertContext2);
	if (ret < 0) {
 	    xmlSecError(XMLSEC_ERRORS_HERE,
 			NULL,
			"xmlSecMSCryptoKeyDataX509AdoptKeyCert",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
	    goto done;
	}
	pCertContext2 = NULL;

	/* set cert in key data */
	data = xmlSecMSCryptoCertAdopt(pCertContext, keyReq->keyType);
	if(data == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			NULL,
			"xmlSecMSCryptoCertAdopt",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			XMLSEC_ERRORS_NO_MESSAGE);
	    goto done;
	}
	pCertContext = NULL;

	/* create key and add key data and x509 data to it */
	key = xmlSecKeyCreate();
	if (key == NULL) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			NULL,
			"xmlSecKeyCreate",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			XMLSEC_ERRORS_NO_MESSAGE);
	    goto done;
	}

	ret = xmlSecKeySetValue(key, data);
	if (ret < 0) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			NULL,
			"xmlSecKeySetValue",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			"data=%s", 
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(data)));
	    goto done;
	}
	data = NULL;

	ret = xmlSecKeyAdoptData(key, x509Data);
	if (ret < 0) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			NULL,
			"xmlSecKeyAdoptData",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			"data=%s",
			xmlSecErrorsSafeString(xmlSecKeyDataGetName(x509Data)));
	    goto done;
	}
	x509Data = NULL;

    	/* Set the name of the key to the given name */
	ret = xmlSecKeySetName(key, name);
	if (ret < 0) {
	    xmlSecError(XMLSEC_ERRORS_HERE,
			xmlSecErrorsSafeString(xmlSecKeyStoreGetName(store)),
			"xmlSecKeySetName",
			XMLSEC_ERRORS_R_XMLSEC_FAILED,
			XMLSEC_ERRORS_NO_MESSAGE);
	    goto done;
	}

        /* now that we have a key, make sure it is valid and let the simple
	* store adopt it */
    	if (xmlSecKeyIsValid(key)) {
	    res = key;
	    key = NULL;
	}
    }

done:
    if (NULL != pCertContext) {
	CertFreeCertificateContext(pCertContext);
    }
    if (NULL != pCertContext2) {
	CertFreeCertificateContext(pCertContext2);
    }
    if (data != NULL) {
	xmlSecKeyDataDestroy(data);
    }
    if (x509Data != NULL) {
	xmlSecKeyDataDestroy(x509Data);
    }
    if (key != NULL) {
	xmlSecKeyDestroy(key);
    }

    return (res);
}