pk11kea.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:8k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (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.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- * This file implements the Symkey wrapper and the PKCS context
- * Interfaces.
- */
- #include "seccomon.h"
- #include "secmod.h"
- #include "prlock.h"
- #include "secmodi.h"
- #include "pkcs11.h"
- #include "pk11func.h"
- #include "secitem.h"
- #include "key.h"
- #include "secasn1.h"
- #include "sechash.h"
- #include "cert.h"
- #include "secerr.h"
- /*
- * find an RSA public key on a card
- */
- static CK_OBJECT_HANDLE
- pk11_FindRSAPubKey(PK11SlotInfo *slot)
- {
- CK_KEY_TYPE key_type = CKK_RSA;
- CK_OBJECT_CLASS class_type = CKO_PUBLIC_KEY;
- CK_ATTRIBUTE theTemplate[2];
- int template_count = sizeof(theTemplate)/sizeof(theTemplate[0]);
- CK_ATTRIBUTE *attrs = theTemplate;
- PK11_SETATTRS(attrs,CKA_CLASS,&class_type,sizeof(class_type)); attrs++;
- PK11_SETATTRS(attrs,CKA_KEY_TYPE,&key_type,sizeof(key_type)); attrs++;
- template_count = attrs - theTemplate;
- PR_ASSERT(template_count <= sizeof(theTemplate)/sizeof(CK_ATTRIBUTE));
- return pk11_FindObjectByTemplate(slot,theTemplate,template_count);
- }
- SECKEYPublicKey *PK11_ExtractPublicKey(PK11SlotInfo *slot, KeyType keyType,
- CK_OBJECT_HANDLE id);
- PK11SymKey *
- pk11_KeyExchange(PK11SlotInfo *slot,CK_MECHANISM_TYPE type,
- CK_ATTRIBUTE_TYPE operation, PK11SymKey *symKey)
- {
- PK11SymKey *newSymKey = NULL;
- SECStatus rv;
- /* performance improvement can go here --- use a generated key to as a
- * per startup wrapping key. If it exists, use it, otherwise do a full
- * key exchange. */
- /* find a common Key Exchange algorithm */
- /* RSA */
- if (PK11_DoesMechanism(symKey->slot, CKM_RSA_PKCS) &&
- PK11_DoesMechanism(slot,CKM_RSA_PKCS)) {
- CK_OBJECT_HANDLE pubKeyHandle = CK_INVALID_KEY;
- CK_OBJECT_HANDLE privKeyHandle = CK_INVALID_KEY;
- SECKEYPublicKey *pubKey = NULL;
- SECKEYPrivateKey *privKey = NULL;
- SECItem wrapData;
- wrapData.data = NULL;
- /* find RSA Public Key on target */
- pubKeyHandle = pk11_FindRSAPubKey(slot);
- if (pubKeyHandle != CK_INVALID_KEY) {
- privKeyHandle = PK11_MatchItem(slot,pubKeyHandle,CKO_PRIVATE_KEY);
- }
- /* if no key exits, generate a key pair */
- if (privKeyHandle == CK_INVALID_KEY) {
- unsigned int keyLength = PK11_GetKeyLength(symKey);
- PK11RSAGenParams rsaParams;
- rsaParams.keySizeInBits =
- ((keyLength == 0) || (keyLength > 16)) ? 512 : 256;
- rsaParams.pe = 0x10001;
- privKey = PK11_GenerateKeyPair(slot,CKM_RSA_PKCS_KEY_PAIR_GEN,
- &rsaParams, &pubKey,PR_FALSE,PR_TRUE,symKey->cx);
- } else {
- /* if key's exist, build SECKEY data structures for them */
- privKey = PK11_MakePrivKey(slot,nullKey, PR_TRUE, privKeyHandle,
- symKey->cx);
- if (privKey != NULL) {
- pubKey = PK11_ExtractPublicKey(slot, rsaKey, pubKeyHandle);
- if (pubKey && pubKey->pkcs11Slot) {
- PK11_FreeSlot(pubKey->pkcs11Slot);
- pubKey->pkcs11Slot = NULL;
- pubKey->pkcs11ID = CK_INVALID_KEY;
- }
- }
- }
- if (privKey == NULL) goto rsa_failed;
- if (pubKey == NULL) goto rsa_failed;
- wrapData.len = SECKEY_PublicKeyStrength(pubKey);
- if (!wrapData.len) goto rsa_failed;
- wrapData.data = PORT_Alloc(wrapData.len);
- if (wrapData.data == NULL) goto rsa_failed;
- /* now wrap the keys in and out */
- rv = PK11_PubWrapSymKey(CKM_RSA_PKCS, pubKey, symKey, &wrapData);
- if (rv == SECSuccess) {
- newSymKey = PK11_PubUnwrapSymKey(privKey,&wrapData,type,operation,
- symKey->size);
- }
- rsa_failed:
- if (wrapData.data != NULL) PORT_Free(wrapData.data);
- if (privKey != NULL) SECKEY_DestroyPrivateKey(privKey);
- if (pubKey != NULL) SECKEY_DestroyPublicKey(pubKey);
- return newSymKey;
- }
- /* KEA */
- if (PK11_DoesMechanism(symKey->slot, CKM_KEA_KEY_DERIVE) &&
- PK11_DoesMechanism(slot,CKM_KEA_KEY_DERIVE)) {
- CERTCertificate *certSource = NULL;
- CERTCertificate *certTarget = NULL;
- SECKEYPublicKey *pubKeySource = NULL;
- SECKEYPublicKey *pubKeyTarget = NULL;
- SECKEYPrivateKey *privKeySource = NULL;
- SECKEYPrivateKey *privKeyTarget = NULL;
- PK11SymKey *tekSource = NULL;
- PK11SymKey *tekTarget = NULL;
- SECItem Ra,wrap;
- /* can only exchange skipjack keys */
- if (type != CKM_SKIPJACK_CBC64) {
- PORT_SetError( SEC_ERROR_NO_MODULE );
- goto kea_failed;
- }
- /* find a pair of certs we can use */
- rv = PK11_GetKEAMatchedCerts(symKey->slot,slot,&certSource,&certTarget);
- if (rv != SECSuccess) goto kea_failed;
- /* get all the key pairs */
- pubKeyTarget = CERT_ExtractPublicKey(certSource);
- pubKeySource = CERT_ExtractPublicKey(certTarget);
- privKeySource =
- PK11_FindKeyByDERCert(symKey->slot,certSource,symKey->cx);
- privKeyTarget =
- PK11_FindKeyByDERCert(slot,certTarget,symKey->cx);
- if ((pubKeySource == NULL) || (pubKeyTarget == NULL) ||
- (privKeySource == NULL) || (privKeyTarget == NULL)) goto kea_failed;
- /* generate the wrapping TEK's */
- Ra.data = (unsigned char*)PORT_Alloc(128 /* FORTEZZA RA MAGIC */);
- Ra.len = 128;
- if (Ra.data == NULL) goto kea_failed;
- tekSource = PK11_PubDerive(privKeySource,pubKeyTarget,PR_TRUE,&Ra,NULL,
- CKM_SKIPJACK_WRAP, CKM_KEA_KEY_DERIVE,CKA_WRAP,0,symKey->cx);
- tekTarget = PK11_PubDerive(privKeyTarget,pubKeySource,PR_FALSE,&Ra,NULL,
- CKM_SKIPJACK_WRAP, CKM_KEA_KEY_DERIVE,CKA_WRAP,0,symKey->cx);
- PORT_Free(Ra.data);
- if ((tekSource == NULL) || (tekTarget == NULL)) { goto kea_failed; }
- /* wrap the key out of Source into target */
- wrap.data = (unsigned char*)PORT_Alloc(12); /* MAGIC SKIPJACK LEN */
- wrap.len = 12;
- /* paranoia to prevent infinite recursion on bugs */
- PORT_Assert(tekSource->slot == symKey->slot);
- if (tekSource->slot != symKey->slot) {
- PORT_SetError( SEC_ERROR_NO_MODULE );
- goto kea_failed;
- }
- rv = PK11_WrapSymKey(CKM_SKIPJACK_WRAP,NULL,tekSource,symKey,&wrap);
- if (rv == SECSuccess) {
- newSymKey = PK11_UnwrapSymKey(tekTarget, CKM_SKIPJACK_WRAP, NULL,
- &wrap, type, operation, symKey->size);
- }
- PORT_Free(wrap.data);
- kea_failed:
- if (certSource == NULL) CERT_DestroyCertificate(certSource);
- if (certTarget == NULL) CERT_DestroyCertificate(certTarget);
- if (pubKeySource == NULL) SECKEY_DestroyPublicKey(pubKeySource);
- if (pubKeyTarget == NULL) SECKEY_DestroyPublicKey(pubKeyTarget);
- if (privKeySource == NULL) SECKEY_DestroyPrivateKey(privKeySource);
- if (privKeyTarget == NULL) SECKEY_DestroyPrivateKey(privKeyTarget);
- if (tekSource == NULL) PK11_FreeSymKey(tekSource);
- if (tekTarget == NULL) PK11_FreeSymKey(tekTarget);
- return newSymKey;
- }
- PORT_SetError( SEC_ERROR_NO_MODULE );
- return NULL;
- }