cmtsdr.c
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上传日期:2007-01-12
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- /*
- * 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.
- */
- /*
- cmtsdr.c -- Support for the Secret Decoder Ring, which provides
- encryption and decryption using stored keys.
- Created by thayes 18 April 2000
- */
- #include "stddef.h"
- #include "cmtcmn.h"
- #include "cmtutils.h"
- #include "messages.h"
- #include "protocolshr.h"
- #include "rsrcids.h"
- #include <string.h>
- #undef PROCESS_LOCALLY
- /* Encryption result - contains the key id and the resulting data */
- /* An empty key id indicates that NO encryption was performed */
- typedef struct EncryptionResult
- {
- CMTItem keyid;
- CMTItem data;
- } EncryptionResult;
- /* Constants for testing */
- static const char *kPrefix = "Encrypted:";
- static CMTItem
- CMT_CopyDataToItem(const unsigned char *data, CMUint32 len)
- {
- CMTItem item;
- item.data = (unsigned char*) calloc(len, 1);
- item.len = len;
- memcpy(item.data, data, len);
- return item;
- }
- static CMTStatus
- tmp_SendMessage(PCMT_CONTROL control, CMTItem *message)
- {
- #ifndef PROCESS_LOCALLY
- return CMT_SendMessage(control, message);
- #else
- if (message->type == SSM_SDR_ENCRYPT_REQUEST)
- return CMT_DoEncryptionRequest(message);
- else if (message->type == SSM_SDR_DECRYPT_REQUEST)
- return CMT_DoDecryptionRequest(message);
- return CMTFailure;
- #endif
- }
- /* End test code */
- CMTStatus
- CMT_SDREncrypt(PCMT_CONTROL control, void *ctx,
- const unsigned char *key, CMUint32 keyLen,
- const unsigned char *data, CMUint32 dataLen,
- unsigned char **result, CMUint32 *resultLen)
- {
- CMTStatus rv = CMTSuccess;
- CMTItem message;
- EncryptRequestMessage request;
- SingleItemMessage reply;
- /* Fill in the request */
- request.keyid = CMT_CopyDataToItem(key, keyLen);
- request.data = CMT_CopyDataToItem(data, dataLen);
- request.ctx = CMT_CopyPtrToItem(ctx);
- reply.item.data = 0;
- reply.item.len = 0;
- message.data = 0;
- message.len = 0;
- /* Encode */
- rv = CMT_EncodeMessage(EncryptRequestTemplate, &message, &request);
- if (rv != CMTSuccess) {
- goto loser;
- }
- message.type = SSM_SDR_ENCRYPT_REQUEST;
- /* Send */
- /* if (CMT_SendMessage(control, &message) != CMTSuccess) goto loser; */
- rv = tmp_SendMessage(control, &message);
- if (rv != CMTSuccess) goto loser;
- if (message.type != SSM_SDR_ENCRYPT_REPLY) { rv = CMTFailure; goto loser; }
- rv = CMT_DecodeMessage(SingleItemMessageTemplate, &reply, &message);
- if (rv != CMTSuccess)
- goto loser;
- *result = reply.item.data;
- *resultLen = reply.item.len;
- reply.item.data = 0;
- loser:
- if (message.data) free(message.data);
- if (request.keyid.data) free(request.keyid.data);
- if (request.data.data) free(request.data.data);
- if (request.ctx.data) free(request.ctx.data);
- if (reply.item.data) free(reply.item.data);
- return rv; /* need return value */
- }
- CMTStatus
- CMT_SDRDecrypt(PCMT_CONTROL control, void *ctx,
- const unsigned char *data, CMUint32 dataLen,
- unsigned char **result, CMUint32 *resultLen)
- {
- CMTStatus rv;
- CMTItem message;
- DecryptRequestMessage request;
- SingleItemMessage reply;
- /* Fill in the request */
- request.data = CMT_CopyDataToItem(data, dataLen);
- request.ctx = CMT_CopyPtrToItem(ctx);
- reply.item.data = 0;
- reply.item.len = 0;
- message.data = 0;
- message.len = 0;
- /* Encode */
- rv = CMT_EncodeMessage(DecryptRequestTemplate, &message, &request);
- if (rv != CMTSuccess) {
- goto loser;
- }
- message.type = SSM_SDR_DECRYPT_REQUEST;
- /* Send */
- /* if (CMT_SendMessage(control, &message) != CMTSuccess) goto loser; */
- rv = tmp_SendMessage(control, &message);
- if (rv != CMTSuccess) goto loser;
- if (message.type != SSM_SDR_DECRYPT_REPLY) { rv = CMTFailure; goto loser; }
- rv = CMT_DecodeMessage(SingleItemMessageTemplate, &reply, &message);
- if (rv != CMTSuccess)
- goto loser;
- *result = reply.item.data;
- *resultLen = reply.item.len;
- reply.item.data = 0;
- loser:
- if (message.data) free(message.data);
- if (request.data.data) free(request.data.data);
- if (request.ctx.data) free(request.ctx.data);
- if (reply.item.data) free(reply.item.data);
- return rv; /* need return value */
- }
- CMTStatus
- CMT_SDRChangePassword(PCMT_CONTROL control, void *ctx)
- {
- CMTStatus rv = CMTSuccess;
- CMTItem message;
- SingleItemMessage request;
- SingleNumMessage reply;
- /* Fill in the request */
- request.item = CMT_CopyPtrToItem(ctx);
- message.data = 0;
- message.len = 0;
- /* Encode */
- rv = CMT_EncodeMessage(SingleItemMessageTemplate, &message, &request);
- if (rv != CMTSuccess) {
- goto loser;
- }
- message.type = (SSM_REQUEST_MESSAGE|SSM_MISC_ACTION|SSM_MISC_UI|SSM_UI_CHANGE_PASSWORD);
- /* Send */
- rv = CMT_SendMessage(control, &message);
- if (rv != CMTSuccess) goto loser;
- if (message.type !=
- (SSM_REPLY_OK_MESSAGE|SSM_MISC_ACTION|SSM_MISC_UI|SSM_UI_CHANGE_PASSWORD)) {
- rv = CMTFailure;
- goto loser;
- }
- rv = CMT_DecodeMessage(SingleNumMessageTemplate, &reply, &message);
- if (rv != CMTSuccess)
- goto loser;
- loser:
- if (request.item.data) free(request.item.data);
- if (message.data) free(message.data);
- return rv; /* need return value */
- }