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-rw-r--r--genisoimage/md5.c401
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diff --git a/genisoimage/md5.c b/genisoimage/md5.c
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+++ b/genisoimage/md5.c
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+/*
+ * This file has been modified for the cdrkit suite.
+ *
+ * The behaviour and appearence of the program code below can differ to a major
+ * extent from the version distributed by the original author(s).
+ *
+ * For details, see Changelog file distributed with the cdrkit package. If you
+ * received this file from another source then ask the distributing person for
+ * a log of modifications.
+ *
+ */
+
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ */
+
+/* This code was modified in 1997 by Jim Kingdon of Cyclic Software to
+ not require an integer type which is exactly 32 bits. This work
+ draws on the changes for the same purpose by Tatu Ylonen
+ <ylo@cs.hut.fi> as part of SSH, but since I didn't actually use
+ that code, there is no copyright issue. I hereby disclaim
+ copyright in any changes I have made; this code remains in the
+ public domain. */
+
+/* Note regarding cvs_* namespace: this avoids potential conflicts
+ with libraries such as some versions of Kerberos. No particular
+ need to worry about whether the system supplies an MD5 library, as
+ this file is only about 3k of object code. */
+
+/* Steve McIntyre, 2004/05/31: borrowed this code from the CVS
+ library. s/cvs_/mk_/ across the source */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h> /* for memcpy() and memset() */
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include "md5.h"
+
+/* Little-endian byte-swapping routines. Note that these do not
+ depend on the size of datatypes such as mk_uint32, nor do they require
+ us to detect the endianness of the machine we are running on. It
+ is possible they should be macros for speed, but I would be
+ surprised if they were a performance bottleneck for MD5. */
+
+static mk_uint32
+getu32 (const unsigned char *addr)
+{
+ return (((((unsigned long)addr[3] << 8) | addr[2]) << 8)
+ | addr[1]) << 8 | addr[0];
+}
+
+static void
+putu32 (mk_uint32 data, unsigned char *addr)
+{
+ addr[0] = (unsigned char)data;
+ addr[1] = (unsigned char)(data >> 8);
+ addr[2] = (unsigned char)(data >> 16);
+ addr[3] = (unsigned char)(data >> 24);
+}
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void
+mk_MD5Init (struct mk_MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+void
+mk_MD5Update (struct mk_MD5Context *ctx, unsigned char const *buf, unsigned len)
+{
+ mk_uint32 t;
+
+ /* Update bitcount */
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = (t + ((mk_uint32)len << 3)) & 0xffffffff) < t)
+ ctx->bits[1]++; /* Carry from low to high */
+ ctx->bits[1] += len >> 29;
+
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
+
+ /* Handle any leading odd-sized chunks */
+
+ if ( t ) {
+ unsigned char *p = ctx->in + t;
+
+ t = 64-t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ mk_MD5Transform (ctx->buf, ctx->in);
+ buf += t;
+ len -= t;
+ }
+
+ /* Process data in 64-byte chunks */
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ mk_MD5Transform (ctx->buf, ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ /* Handle any remaining bytes of data. */
+
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void
+mk_MD5Final (unsigned char digest[16], struct mk_MD5Context *ctx)
+{
+ unsigned count;
+ unsigned char *p;
+
+ /* Compute number of bytes mod 64 */
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ /* Set the first char of padding to 0x80. This is safe since there is
+ always at least one byte free */
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 64 bytes */
+ count = 64 - 1 - count;
+
+ /* Pad out to 56 mod 64 */
+ if (count < 8) {
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ mk_MD5Transform (ctx->buf, ctx->in);
+
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
+ } else {
+ /* Pad block to 56 bytes */
+ memset(p, 0, count-8);
+ }
+
+ /* Append length in bits and transform */
+ putu32(ctx->bits[0], ctx->in + 56);
+ putu32(ctx->bits[1], ctx->in + 60);
+
+ mk_MD5Transform (ctx->buf, ctx->in);
+ putu32(ctx->buf[0], digest);
+ putu32(ctx->buf[1], digest + 4);
+ putu32(ctx->buf[2], digest + 8);
+ putu32(ctx->buf[3], digest + 12);
+ memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
+}
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w &= 0xffffffff, w = w<<s | w>>(32-s), w += x )
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data. MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+void
+mk_MD5Transform (mk_uint32 buf[4], const unsigned char inraw[64])
+{
+ register mk_uint32 a, b, c, d;
+ mk_uint32 in[16];
+ int i;
+
+ for (i = 0; i < 16; ++i)
+ in[i] = getu32 (inraw + 4 * i);
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478, 7);
+ MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12);
+ MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17);
+ MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22);
+ MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf, 7);
+ MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12);
+ MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17);
+ MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22);
+ MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8, 7);
+ MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12);
+ MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17);
+ MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22);
+ MD5STEP(F1, a, b, c, d, in[12]+0x6b901122, 7);
+ MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12);
+ MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17);
+ MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22);
+
+ MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562, 5);
+ MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340, 9);
+ MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);
+ MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);
+ MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d, 5);
+ MD5STEP(F2, d, a, b, c, in[10]+0x02441453, 9);
+ MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);
+ MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);
+ MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6, 5);
+ MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6, 9);
+ MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);
+ MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);
+ MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905, 5);
+ MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8, 9);
+ MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);
+ MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);
+
+ MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942, 4);
+ MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11);
+ MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16);
+ MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23);
+ MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44, 4);
+ MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11);
+ MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16);
+ MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23);
+ MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6, 4);
+ MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11);
+ MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16);
+ MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23);
+ MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039, 4);
+ MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11);
+ MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16);
+ MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23);
+
+ MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244, 6);
+ MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10);
+ MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15);
+ MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21);
+ MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3, 6);
+ MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10);
+ MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15);
+ MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21);
+ MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f, 6);
+ MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10);
+ MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15);
+ MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21);
+ MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82, 6);
+ MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10);
+ MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15);
+ MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+/* Read in a hex-dumped MD5 sum and parse it */
+int mk_MD5Parse(unsigned char in[33], unsigned char out[16])
+{
+ int i = 0;
+
+ for (i = 0; i < 16; i++)
+ {
+ if (in[2*i] >= '0' && in[2*i] <= '9')
+ in[2*i] -= '0';
+ else if (in[2*i] >= 'A' && in[2*i] <= 'F')
+ in[2*i] += 10 - 'A';
+ else if (in[2*i] >= 'a' && in[2*i] <= 'f')
+ in[2*i] += 10 - 'a';
+ else
+ return 1;
+ if (in[1+(2*i)] >= '0' && in[1+(2*i)] <= '9')
+ in[1+(2*i)] -= '0';
+ else if (in[1+(2*i)] >= 'A' && in[1+(2*i)] <= 'F')
+ in[1+(2*i)] += 10 - 'A';
+ else if (in[1+(2*i)] >= 'a' && in[1+(2*i)] <= 'f')
+ in[1+(2*i)] += 10 - 'a';
+ else
+ return 1;
+ out[i] = in[2*i] << 4 | in[1+(2*i)];
+ }
+ return 0;
+}
+
+/* Calculate the MD5sum of the specified file */
+int calculate_md5sum(char *filename, unsigned long long size, unsigned char out[16])
+{
+ char buffer[32768];
+ int i = 0;
+ FILE *infile = NULL;
+ unsigned long long remain = 0;
+ int use;
+ struct mk_MD5Context file_context;
+
+ /* Start MD5 work for the file */
+ mk_MD5Init(&file_context);
+
+ infile = fopen(filename, "rb");
+ if (!infile)
+ {
+#ifndef HAVE_STRERROR
+ fprintf(stderr, "cannot open '%s': (%d)\n",
+ filename, errno);
+#else
+ fprintf(stderr, "cannot open '%s': %s\n",
+ filename, strerror(errno));
+#endif
+ exit(1);
+ }
+
+ remain = size;
+ while (remain > 0)
+ {
+ use = (remain > sizeof(buffer) ? sizeof(buffer) : remain);
+ if (fread(buffer, 1, use, infile) == 0)
+ {
+ fprintf(stderr, "cannot read from '%s'\n", filename);
+ exit(1);
+ }
+ /* Update the checksum */
+ mk_MD5Update(&file_context, (unsigned char *)buffer, use);
+ remain -= use;
+ }
+ fclose(infile);
+ mk_MD5Final(&out[0], &file_context);
+
+ return 0;
+}
+
+
+#ifdef TEST
+/* Simple test program. Can use it to manually run the tests from
+ RFC1321 for example. */
+#include <stdio.h>
+
+int
+main (int argc, char *argv[])
+{
+ struct mk_MD5Context context;
+ unsigned char checksum[16];
+ int i;
+ int j;
+
+ if (argc < 2)
+ {
+ fprintf (stderr, "usage: %s string-to-hash\n", argv[0]);
+ exit (1);
+ }
+ for (j = 1; j < argc; ++j)
+ {
+ printf ("MD5 (\"%s\") = ", argv[j]);
+ mk_MD5Init (&context);
+ mk_MD5Update (&context, argv[j], strlen (argv[j]));
+ mk_MD5Final (checksum, &context);
+ for (i = 0; i < 16; i++)
+ {
+ printf ("%02x", (unsigned int) checksum[i]);
+ }
+ printf ("\n");
+ }
+ return 0;
+}
+#endif /* TEST */
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