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- /* (C) Copyright 1993,1994 by Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without
- * fee, provided that the above copyright notice appear in all copies
- * and that both that copyright notice and this permission notice
- * appear in supporting documentation, and that the name of Carnegie
- * Mellon University not be used in advertising or publicity
- * pertaining to distribution of the software without specific,
- * written prior permission. Carnegie Mellon University makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied
- * warranty.
- *
- * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
- * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
- * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
- * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
- /*
- Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
-
- Permission to use, copy, modify, and distribute this material
- for any purpose and without fee is hereby granted, provided
- that the above copyright notice and this permission notice
- appear in all copies, and that the name of Bellcore not be
- used in advertising or publicity pertaining to this
- material without the specific, prior written permission
- of an authorized representative of Bellcore. BELLCORE
- MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY
- OF THIS MATERIAL FOR ANY PURPOSE. IT IS PROVIDED "AS IS",
- WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. */
- #include <stdio.h>
- #include <string.h>
- #include <ctype.h>
- #include "xmalloc.h"
- #include "md5.h"
-
- static char basis_64[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
- int to64(infile, outfile, limit)
- FILE *infile, *outfile;
- long limit;
- {
- int c1, c2, c3, ct=0, written=0;
-
- if (limit && limit < 73) return 1;
-
- while ((c1 = getc(infile)) != EOF) {
- c2 = getc(infile);
- if (c2 == EOF) {
- output64chunk(c1, 0, 0, 2, outfile);
- } else {
- c3 = getc(infile);
- if (c3 == EOF) {
- output64chunk(c1, c2, 0, 1, outfile);
- } else {
- output64chunk(c1, c2, c3, 0, outfile);
- }
- }
- ct += 4;
- if (ct > 71) {
- putc('\n', outfile);
- if (limit) {
- limit -= ct + 1;
- if (limit < 73) return 1;
- }
- written += 73;
- ct = 0;
- }
- }
- if (ct) {
- putc('\n', outfile);
- ct++;
- }
- return written + ct;
- }
-
- output64chunk(c1, c2, c3, pads, outfile)
- FILE *outfile;
- {
- putc(basis_64[c1>>2], outfile);
- putc(basis_64[((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4)], outfile);
- if (pads == 2) {
- putc('=', outfile);
- putc('=', outfile);
- } else if (pads) {
- putc(basis_64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)], outfile);
- putc('=', outfile);
- } else {
- putc(basis_64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)], outfile);
- putc(basis_64[c3 & 0x3F], outfile);
- }
- }
-
- char *md5contextTo64(context)
- MD5_CTX *context;
- {
- unsigned char digest[18];
- char encodedDigest[25];
- int i;
- char *p;
-
- MD5Final(digest, context);
- digest[sizeof(digest)-1] = digest[sizeof(digest)-2] = 0;
-
- p = encodedDigest;
- for (i=0; i < sizeof(digest); i+=3) {
- *p++ = basis_64[digest[i]>>2];
- *p++ = basis_64[((digest[i] & 0x3)<<4) | ((digest[i+1] & 0xF0)>>4)];
- *p++ = basis_64[((digest[i+1] & 0xF)<<2) | ((digest[i+2] & 0xC0)>>6)];
- *p++ = basis_64[digest[i+2] & 0x3F];
- }
- *p-- = '\0';
- *p-- = '=';
- *p-- = '=';
- return strsave(encodedDigest);
- }
-
- char *md5digest(infile, len)
- FILE *infile;
- long *len;
- {
- MD5_CTX context;
- char buf[1000];
- long length = 0;
- int nbytes;
-
- MD5Init(&context);
- while (nbytes = fread(buf, 1, sizeof(buf), infile)) {
- length += nbytes;
- MD5Update(&context, buf, nbytes);
- }
- rewind(infile);
- if (len) *len = length;
- return md5contextTo64(&context);
- }
-