atob.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:4k
- /*
- * 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.
- */
- #include "plgetopt.h"
- #include "secutil.h"
- #include "nssb64.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 SECStatus
- decode_file(FILE *outFile, FILE *inFile)
- {
- NSSBase64Decoder *cx;
- int nb;
- SECStatus status = SECFailure;
- char ibuf[4096];
- cx = NSSBase64Decoder_Create(output_binary, outFile);
- if (!cx) {
- return -1;
- }
- for (;;) {
- if (feof(inFile)) break;
- nb = fread(ibuf, 1, sizeof(ibuf), inFile);
- if (nb != sizeof(ibuf)) {
- if (nb == 0) {
- if (ferror(inFile)) {
- PORT_SetError(SEC_ERROR_IO);
- goto loser;
- }
- /* eof */
- break;
- }
- }
- status = NSSBase64Decoder_Update(cx, ibuf, nb);
- 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");
- exit(-1);
- }
- int main(int argc, char **argv)
- {
- char *progName;
- SECStatus rv;
- FILE *inFile, *outFile;
- PLOptState *optstate;
- PLOptStatus status;
- inFile = 0;
- outFile = 0;
- progName = strrchr(argv[0], '/');
- progName = progName ? progName+1 : argv[0];
- /* Parse command line arguments */
- optstate = PL_CreateOptState(argc, argv, "i:o:");
- while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
- switch (optstate->option) {
- case '?':
- Usage(progName);
- break;
- case 'i':
- inFile = fopen(optstate->value, "r");
- if (!inFile) {
- fprintf(stderr, "%s: unable to open "%s" for readingn",
- progName, optstate->value);
- return -1;
- }
- break;
- case 'o':
- outFile = fopen(optstate->value, "wb");
- if (!outFile) {
- fprintf(stderr, "%s: unable to open "%s" for writingn",
- progName, optstate->value);
- return -1;
- }
- break;
- }
- }
- if (!inFile) inFile = stdin;
- 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);
- return smrv;
- }
- #endif
- outFile = stdout;
- }
- rv = decode_file(outFile, inFile);
- if (rv != SECSuccess) {
- fprintf(stderr, "%s: lossage: error=%d errno=%dn",
- progName, PORT_GetError(), errno);
- return -1;
- }
- return 0;
- }