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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* p7env -- A command to create a pkcs7 enveloped data.
*/
#include "nspr.h"
#include "secutil.h"
#include "plgetopt.h"
#include "secpkcs7.h"
#include "cert.h"
#include "certdb.h"
#include "nss.h"
#if defined(XP_UNIX)
#include <unistd.h>
#endif
#include <stdio.h>
#include <string.h>
#if (defined(XP_WIN) && !defined(WIN32)) || (defined(__sun) && !defined(SVR4))
extern int fread(char *, size_t, size_t, FILE *);
extern int fwrite(char *, size_t, size_t, FILE *);
extern int fprintf(FILE *, char *, ...);
#endif
static void
Usage(char *progName)
{
fprintf(stderr,
"Usage: %s -r recipient [-d dbdir] [-i input] [-o output]\n",
progName);
fprintf(stderr, "%-20s Nickname of cert to use for encryption\n",
"-r recipient");
fprintf(stderr, "%-20s Cert database directory (default is ~/.netscape)\n",
"-d dbdir");
fprintf(stderr, "%-20s Define an input file to use (default is stdin)\n",
"-i input");
fprintf(stderr, "%-20s Define an output file to use (default is stdout)\n",
"-o output");
exit(-1);
}
struct recipient {
struct recipient *next;
char *nickname;
CERTCertificate *cert;
};
static void
EncryptOut(void *arg, const char *buf, unsigned long len)
{
FILE *out;
out = arg;
fwrite(buf, len, 1, out);
}
static int
EncryptFile(FILE *outFile, FILE *inFile, struct recipient *recipients,
char *progName)
{
SEC_PKCS7ContentInfo *cinfo;
SEC_PKCS7EncoderContext *ecx;
struct recipient *rcpt;
SECStatus rv;
if (outFile == NULL || inFile == NULL || recipients == NULL)
return -1;
/* XXX Need a better way to handle that certUsage stuff! */
/* XXX keysize? */
cinfo = SEC_PKCS7CreateEnvelopedData(recipients->cert,
certUsageEmailRecipient,
NULL, SEC_OID_DES_EDE3_CBC, 0,
NULL, NULL);
if (cinfo == NULL)
return -1;
for (rcpt = recipients->next; rcpt != NULL; rcpt = rcpt->next) {
rv = SEC_PKCS7AddRecipient(cinfo, rcpt->cert, certUsageEmailRecipient,
NULL);
if (rv != SECSuccess) {
SECU_PrintError(progName, "error adding recipient \"%s\"",
rcpt->nickname);
return -1;
}
}
ecx = SEC_PKCS7EncoderStart(cinfo, EncryptOut, outFile, NULL);
if (ecx == NULL)
return -1;
for (;;) {
char ibuf[1024];
int nb;
if (feof(inFile))
break;
nb = fread(ibuf, 1, sizeof(ibuf), inFile);
if (nb == 0) {
if (ferror(inFile)) {
PORT_SetError(SEC_ERROR_IO);
rv = SECFailure;
}
break;
}
rv = SEC_PKCS7EncoderUpdate(ecx, ibuf, nb);
if (rv != SECSuccess)
break;
}
if (SEC_PKCS7EncoderFinish(ecx, NULL, NULL) != SECSuccess)
rv = SECFailure;
SEC_PKCS7DestroyContentInfo(cinfo);
if (rv != SECSuccess)
return -1;
return 0;
}
int
main(int argc, char **argv)
{
char *progName;
FILE *inFile, *outFile;
CERTCertDBHandle *certHandle;
struct recipient *recipients, *rcpt;
PLOptState *optstate;
PLOptStatus status;
SECStatus rv;
progName = strrchr(argv[0], '/');
progName = progName ? progName + 1 : argv[0];
inFile = NULL;
outFile = NULL;
recipients = NULL;
rcpt = NULL;
/*
* Parse command line arguments
* XXX This needs to be enhanced to allow selection of algorithms
* and key sizes (or to look up algorithms and key sizes for each
* recipient in the magic database).
*/
optstate = PL_CreateOptState(argc, argv, "d:i:o:r:");
while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
switch (optstate->option) {
case '?':
Usage(progName);
break;
case 'd':
SECU_ConfigDirectory(optstate->value);
break;
case 'i':
inFile = fopen(optstate->value, "r");
if (!inFile) {
fprintf(stderr, "%s: unable to open \"%s\" for reading\n",
progName, optstate->value);
return -1;
}
break;
case 'o':
outFile = fopen(optstate->value, "wb");
if (!outFile) {
fprintf(stderr, "%s: unable to open \"%s\" for writing\n",
progName, optstate->value);
return -1;
}
break;
case 'r':
if (rcpt == NULL) {
recipients = rcpt = PORT_Alloc(sizeof(struct recipient));
} else {
rcpt->next = PORT_Alloc(sizeof(struct recipient));
rcpt = rcpt->next;
}
if (rcpt == NULL) {
fprintf(stderr, "%s: unable to allocate recipient struct\n",
progName);
return -1;
}
rcpt->nickname = PORT_Strdup(optstate->value);
rcpt->cert = NULL;
rcpt->next = NULL;
break;
}
}
PL_DestroyOptState(optstate);
if (!recipients)
Usage(progName);
if (!inFile)
inFile = stdin;
if (!outFile)
outFile = stdout;
/* Call the NSS initialization routines */
PR_Init(PR_SYSTEM_THREAD, PR_PRIORITY_NORMAL, 1);
rv = NSS_Init(SECU_ConfigDirectory(NULL));
if (rv != SECSuccess) {
SECU_PrintPRandOSError(progName);
return -1;
}
/* open cert database */
certHandle = CERT_GetDefaultCertDB();
if (certHandle == NULL) {
return -1;
}
/* find certs */
for (rcpt = recipients; rcpt != NULL; rcpt = rcpt->next) {
rcpt->cert = CERT_FindCertByNickname(certHandle, rcpt->nickname);
if (rcpt->cert == NULL) {
SECU_PrintError(progName,
"the cert for name \"%s\" not found in database",
rcpt->nickname);
return -1;
}
}
if (EncryptFile(outFile, inFile, recipients, progName)) {
SECU_PrintError(progName, "problem encrypting data");
return -1;
}
/* free certs */
for (rcpt = recipients; rcpt != NULL;) {
struct recipient *next = rcpt->next;
CERT_DestroyCertificate(rcpt->cert);
PORT_Free(rcpt->nickname);
PORT_Free(rcpt);
rcpt = next;
}
if (inFile && inFile != stdin) {
fclose(inFile);
}
if (outFile && outFile != stdout) {
fclose(outFile);
}
if (NSS_Shutdown() != SECSuccess) {
SECU_PrintError(progName, "NSS shutdown:");
return -1;
}
return 0;
}
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