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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/. */
#include "plgetopt.h"
#include "secutil.h"
#include "nssb64.h"
#include <errno.h>
#if defined(XP_WIN) || (defined(__sun) && !defined(SVR4))
#if !defined(WIN32)
extern int fread(char *, size_t, size_t, FILE *);
extern int fwrite(char *, size_t, size_t, FILE *);
extern int fprintf(FILE *, char *, ...);
#endif
#endif
#if defined(WIN32)
#include "fcntl.h"
#include "io.h"
#endif
static PRInt32
output_binary(void *arg, const unsigned char *obuf, PRInt32 size)
{
FILE *outFile = arg;
int nb;
nb = fwrite(obuf, 1, size, outFile);
if (nb != size) {
PORT_SetError(SEC_ERROR_IO);
return -1;
}
return nb;
}
static PRBool
isBase64Char(char c)
{
return ((c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9') ||
c == '+' || c == '/' ||
c == '=');
}
static SECStatus
decode_file(FILE *outFile, FILE *inFile)
{
NSSBase64Decoder *cx;
SECStatus status = SECFailure;
char ibuf[4096];
const char *ptr;
cx = NSSBase64Decoder_Create(output_binary, outFile);
if (!cx) {
return -1;
}
for (;;) {
if (feof(inFile))
break;
if (!fgets(ibuf, sizeof(ibuf), inFile)) {
if (ferror(inFile)) {
PORT_SetError(SEC_ERROR_IO);
goto loser;
}
/* eof */
break;
}
for (ptr = ibuf; *ptr; ++ptr) {
char c = *ptr;
if (c == '\n' || c == '\r') {
break; /* found end of line */
}
if (!isBase64Char(c)) {
ptr = ibuf; /* ignore line */
break;
}
}
if (ibuf == ptr) {
continue; /* skip empty or non-base64 line */
}
status = NSSBase64Decoder_Update(cx, ibuf, ptr - ibuf);
if (status != SECSuccess)
goto loser;
}
return NSSBase64Decoder_Destroy(cx, PR_FALSE);
loser:
(void)NSSBase64Decoder_Destroy(cx, PR_TRUE);
return status;
}
static void
Usage(char *progName)
{
fprintf(stderr,
"Usage: %s [-i input] [-o output]\n",
progName);
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");
}
int
main(int argc, char **argv)
{
char *progName;
SECStatus rv;
FILE *inFile = NULL, *outFile = NULL;
PRBool closeIn = PR_TRUE, closeOut = PR_TRUE;
PLOptState *optstate = NULL;
PLOptStatus status;
int exitCode = -1;
progName = strrchr(argv[0], '/');
progName = progName ? progName + 1 : argv[0];
/* Parse command line arguments */
optstate = PL_CreateOptState(argc, argv, "?hi:o:");
while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
switch (optstate->option) {
case '?':
case 'h':
Usage(progName);
goto loser;
break;
case 'i':
inFile = fopen(optstate->value, "r");
if (!inFile) {
fprintf(stderr, "%s: unable to open \"%s\" for reading\n",
progName, optstate->value);
goto loser;
}
break;
case 'o':
outFile = fopen(optstate->value, "wb");
if (!outFile) {
fprintf(stderr, "%s: unable to open \"%s\" for writing\n",
progName, optstate->value);
goto loser;
}
break;
}
}
if (!inFile) {
inFile = stdin;
closeIn = PR_FALSE;
}
if (!outFile) {
#if defined(WIN32)
int smrv = _setmode(_fileno(stdout), _O_BINARY);
if (smrv == -1) {
fprintf(stderr,
"%s: Cannot change stdout to binary mode. Use -o option instead.\n",
progName);
goto loser;
}
#endif
outFile = stdout;
closeOut = PR_FALSE;
}
rv = decode_file(outFile, inFile);
if (rv != SECSuccess) {
fprintf(stderr, "%s: lossage: error=%d errno=%d\n",
progName, PORT_GetError(), errno);
goto loser;
}
exitCode = 0;
loser:
if (optstate) {
PL_DestroyOptState(optstate);
}
if (inFile && closeIn) {
fclose(inFile);
}
if (outFile && closeOut) {
fclose(outFile);
}
return exitCode;
}