michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "plgetopt.h"
michael@0: #include "secutil.h"
michael@0: #include "nssb64.h"
michael@0: #include <errno.h>
michael@0: 
michael@0: #if defined(XP_WIN) || (defined(__sun) && !defined(SVR4))
michael@0: #if !defined(WIN32)
michael@0: extern int fread(char *, size_t, size_t, FILE*);
michael@0: extern int fwrite(char *, size_t, size_t, FILE*);
michael@0: extern int fprintf(FILE *, char *, ...);
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(WIN32)
michael@0: #include "fcntl.h"
michael@0: #include "io.h"
michael@0: #endif
michael@0: 
michael@0: static PRInt32 
michael@0: output_binary (void *arg, const unsigned char *obuf, PRInt32 size)
michael@0: {
michael@0:     FILE *outFile = arg;
michael@0:     int nb;
michael@0: 
michael@0:     nb = fwrite(obuf, 1, size, outFile);
michael@0:     if (nb != size) {
michael@0: 	PORT_SetError(SEC_ERROR_IO);
michael@0: 	return -1;
michael@0:     }
michael@0: 
michael@0:     return nb;
michael@0: }
michael@0: 
michael@0: static PRBool
michael@0: isBase64Char(char c)
michael@0: {
michael@0:     return ((c >= 'A' && c <= 'Z')
michael@0: 	    || (c >= 'a' && c <= 'z')
michael@0: 	    || (c >= '0' && c <= '9')
michael@0: 	    || c == '+'
michael@0: 	    || c == '/'
michael@0: 	    || c == '=');
michael@0: }
michael@0: 
michael@0: static SECStatus
michael@0: decode_file(FILE *outFile, FILE *inFile)
michael@0: {
michael@0:     NSSBase64Decoder *cx;
michael@0:     SECStatus status = SECFailure;
michael@0:     char ibuf[4096];
michael@0:     const char *ptr;
michael@0: 
michael@0:     cx = NSSBase64Decoder_Create(output_binary, outFile);
michael@0:     if (!cx) {
michael@0: 	return -1;
michael@0:     }
michael@0: 
michael@0:     for (;;) {
michael@0: 	if (feof(inFile)) break;
michael@0: 	if (!fgets(ibuf, sizeof(ibuf), inFile)) {
michael@0: 	    if (ferror(inFile)) {
michael@0: 		PORT_SetError(SEC_ERROR_IO);
michael@0: 		goto loser;
michael@0: 	    }
michael@0: 	    /* eof */
michael@0: 	    break;
michael@0: 	}
michael@0: 	for (ptr = ibuf; *ptr; ++ptr) {
michael@0: 	    char c = *ptr;
michael@0: 	    if (c == '\n' || c == '\r') {
michael@0: 		break; /* found end of line */
michael@0: 	    }
michael@0: 	    if (!isBase64Char(c)) {
michael@0: 	      ptr = ibuf; /* ignore line */
michael@0: 	      break;
michael@0: 	    }
michael@0: 	}
michael@0: 	if (ibuf == ptr) {
michael@0: 	    continue; /* skip empty or non-base64 line */
michael@0: 	}
michael@0: 
michael@0: 	status = NSSBase64Decoder_Update(cx, ibuf, ptr-ibuf);
michael@0: 	if (status != SECSuccess) goto loser;
michael@0:     }
michael@0: 
michael@0:     return NSSBase64Decoder_Destroy(cx, PR_FALSE);
michael@0: 
michael@0:   loser:
michael@0:     (void) NSSBase64Decoder_Destroy(cx, PR_TRUE);
michael@0:     return status;
michael@0: }
michael@0: 
michael@0: static void Usage(char *progName)
michael@0: {
michael@0:     fprintf(stderr,
michael@0: 	    "Usage: %s [-i input] [-o output]\n",
michael@0: 	    progName);
michael@0:     fprintf(stderr, "%-20s Define an input file to use (default is stdin)\n",
michael@0: 	    "-i input");
michael@0:     fprintf(stderr, "%-20s Define an output file to use (default is stdout)\n",
michael@0: 	    "-o output");
michael@0:     exit(-1);
michael@0: }
michael@0: 
michael@0: int main(int argc, char **argv)
michael@0: {
michael@0:     char *progName;
michael@0:     SECStatus rv;
michael@0:     FILE *inFile, *outFile;
michael@0:     PLOptState *optstate;
michael@0:     PLOptStatus status;
michael@0: 
michael@0:     inFile = 0;
michael@0:     outFile = 0;
michael@0:     progName = strrchr(argv[0], '/');
michael@0:     progName = progName ? progName+1 : argv[0];
michael@0: 
michael@0:     /* Parse command line arguments */
michael@0:     optstate = PL_CreateOptState(argc, argv, "?hi:o:");
michael@0:     while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
michael@0: 	switch (optstate->option) {
michael@0: 	  case '?':
michael@0: 	  case 'h':
michael@0: 	    Usage(progName);
michael@0: 	    break;
michael@0: 
michael@0: 	  case 'i':
michael@0: 	    inFile = fopen(optstate->value, "r");
michael@0: 	    if (!inFile) {
michael@0: 		fprintf(stderr, "%s: unable to open \"%s\" for reading\n",
michael@0: 			progName, optstate->value);
michael@0: 		return -1;
michael@0: 	    }
michael@0: 	    break;
michael@0: 
michael@0: 	  case 'o':
michael@0: 	    outFile = fopen(optstate->value, "wb");
michael@0: 	    if (!outFile) {
michael@0: 		fprintf(stderr, "%s: unable to open \"%s\" for writing\n",
michael@0: 			progName, optstate->value);
michael@0: 		return -1;
michael@0: 	    }
michael@0: 	    break;
michael@0: 	}
michael@0:     }
michael@0:     if (!inFile) inFile = stdin;
michael@0:     if (!outFile) {
michael@0: #if defined(WIN32)
michael@0: 	int smrv = _setmode(_fileno(stdout), _O_BINARY);
michael@0: 	if (smrv == -1) {
michael@0: 	    fprintf(stderr,
michael@0: 	    "%s: Cannot change stdout to binary mode. Use -o option instead.\n",
michael@0: 	            progName);
michael@0: 	    return smrv;
michael@0: 	}
michael@0: #endif
michael@0:     	outFile = stdout;
michael@0:     }
michael@0:     rv = decode_file(outFile, inFile);
michael@0:     if (rv != SECSuccess) {
michael@0: 	fprintf(stderr, "%s: lossage: error=%d errno=%d\n",
michael@0: 		progName, PORT_GetError(), errno);
michael@0: 	return -1;
michael@0:     }
michael@0:     return 0;
michael@0: }