--- /dev/null
+#include <netinet/in.h>
+#include <stdint.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include "modpost.h"
+
+/* Parse tag=value strings from .modinfo section */
+static char *next_string(char *string, unsigned long *secsize)
+{
+ /* Skip non-zero chars */
+ while (string[0]) {
+ string++;
+ if ((*secsize)-- <= 1)
+ return NULL;
+ }
+
+ /* Skip any zero padding. */
+ while (!string[0]) {
+ string++;
+ if ((*secsize)-- <= 1)
+ return NULL;
+ }
+ return string;
+}
+
+static char *get_modinfo(void *modinfo, unsigned long modinfo_len,
+ const char *tag)
+{
+ char *p;
+ unsigned int taglen = strlen(tag);
+ unsigned long size = modinfo_len;
+
+ for (p = modinfo; p; p = next_string(p, &size)) {
+ if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
+ return p + taglen + 1;
+ }
+ return NULL;
+}
+
+/*
+ * Stolen form Cryptographic API.
+ *
+ * MD4 Message Digest Algorithm (RFC1320).
+ *
+ * Implementation derived from Andrew Tridgell and Steve French's
+ * CIFS MD4 implementation, and the cryptoapi implementation
+ * originally based on the public domain implementation written
+ * by Colin Plumb in 1993.
+ *
+ * Copyright (c) Andrew Tridgell 1997-1998.
+ * Modified by Steve French (sfrench@us.ibm.com) 2002
+ * Copyright (c) Cryptoapi developers.
+ * Copyright (c) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+#define MD4_DIGEST_SIZE 16
+#define MD4_HMAC_BLOCK_SIZE 64
+#define MD4_BLOCK_WORDS 16
+#define MD4_HASH_WORDS 4
+
+struct md4_ctx {
+ uint32_t hash[MD4_HASH_WORDS];
+ uint32_t block[MD4_BLOCK_WORDS];
+ uint64_t byte_count;
+};
+
+static inline uint32_t lshift(uint32_t x, unsigned int s)
+{
+ x &= 0xFFFFFFFF;
+ return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
+}
+
+static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
+{
+ return (x & y) | ((~x) & z);
+}
+
+static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
+{
+ return (x & y) | (x & z) | (y & z);
+}
+
+static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
+{
+ return x ^ y ^ z;
+}
+
+#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
+#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
+#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))
+
+/* XXX: this stuff can be optimized */
+static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
+{
+ while (words--) {
+ *buf = ntohl(*buf);
+ buf++;
+ }
+}
+
+static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
+{
+ while (words--) {
+ *buf = htonl(*buf);
+ buf++;
+ }
+}
+
+static void md4_transform(uint32_t *hash, uint32_t const *in)
+{
+ uint32_t a, b, c, d;
+
+ a = hash[0];
+ b = hash[1];
+ c = hash[2];
+ d = hash[3];
+
+ ROUND1(a, b, c, d, in[0], 3);
+ ROUND1(d, a, b, c, in[1], 7);
+ ROUND1(c, d, a, b, in[2], 11);
+ ROUND1(b, c, d, a, in[3], 19);
+ ROUND1(a, b, c, d, in[4], 3);
+ ROUND1(d, a, b, c, in[5], 7);
+ ROUND1(c, d, a, b, in[6], 11);
+ ROUND1(b, c, d, a, in[7], 19);
+ ROUND1(a, b, c, d, in[8], 3);
+ ROUND1(d, a, b, c, in[9], 7);
+ ROUND1(c, d, a, b, in[10], 11);
+ ROUND1(b, c, d, a, in[11], 19);
+ ROUND1(a, b, c, d, in[12], 3);
+ ROUND1(d, a, b, c, in[13], 7);
+ ROUND1(c, d, a, b, in[14], 11);
+ ROUND1(b, c, d, a, in[15], 19);
+
+ ROUND2(a, b, c, d,in[ 0], 3);
+ ROUND2(d, a, b, c, in[4], 5);
+ ROUND2(c, d, a, b, in[8], 9);
+ ROUND2(b, c, d, a, in[12], 13);
+ ROUND2(a, b, c, d, in[1], 3);
+ ROUND2(d, a, b, c, in[5], 5);
+ ROUND2(c, d, a, b, in[9], 9);
+ ROUND2(b, c, d, a, in[13], 13);
+ ROUND2(a, b, c, d, in[2], 3);
+ ROUND2(d, a, b, c, in[6], 5);
+ ROUND2(c, d, a, b, in[10], 9);
+ ROUND2(b, c, d, a, in[14], 13);
+ ROUND2(a, b, c, d, in[3], 3);
+ ROUND2(d, a, b, c, in[7], 5);
+ ROUND2(c, d, a, b, in[11], 9);
+ ROUND2(b, c, d, a, in[15], 13);
+
+ ROUND3(a, b, c, d,in[ 0], 3);
+ ROUND3(d, a, b, c, in[8], 9);
+ ROUND3(c, d, a, b, in[4], 11);
+ ROUND3(b, c, d, a, in[12], 15);
+ ROUND3(a, b, c, d, in[2], 3);
+ ROUND3(d, a, b, c, in[10], 9);
+ ROUND3(c, d, a, b, in[6], 11);
+ ROUND3(b, c, d, a, in[14], 15);
+ ROUND3(a, b, c, d, in[1], 3);
+ ROUND3(d, a, b, c, in[9], 9);
+ ROUND3(c, d, a, b, in[5], 11);
+ ROUND3(b, c, d, a, in[13], 15);
+ ROUND3(a, b, c, d, in[3], 3);
+ ROUND3(d, a, b, c, in[11], 9);
+ ROUND3(c, d, a, b, in[7], 11);
+ ROUND3(b, c, d, a, in[15], 15);
+
+ hash[0] += a;
+ hash[1] += b;
+ hash[2] += c;
+ hash[3] += d;
+}
+
+static inline void md4_transform_helper(struct md4_ctx *ctx)
+{
+ le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t));
+ md4_transform(ctx->hash, ctx->block);
+}
+
+static void md4_init(struct md4_ctx *mctx)
+{
+ mctx->hash[0] = 0x67452301;
+ mctx->hash[1] = 0xefcdab89;
+ mctx->hash[2] = 0x98badcfe;
+ mctx->hash[3] = 0x10325476;
+ mctx->byte_count = 0;
+}
+
+static void md4_update(struct md4_ctx *mctx,
+ const unsigned char *data, unsigned int len)
+{
+ const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
+
+ mctx->byte_count += len;
+
+ if (avail > len) {
+ memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+ data, len);
+ return;
+ }
+
+ memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
+ data, avail);
+
+ md4_transform_helper(mctx);
+ data += avail;
+ len -= avail;
+
+ while (len >= sizeof(mctx->block)) {
+ memcpy(mctx->block, data, sizeof(mctx->block));
+ md4_transform_helper(mctx);
+ data += sizeof(mctx->block);
+ len -= sizeof(mctx->block);
+ }
+
+ memcpy(mctx->block, data, len);
+}
+
+static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len)
+{
+ const unsigned int offset = mctx->byte_count & 0x3f;
+ char *p = (char *)mctx->block + offset;
+ int padding = 56 - (offset + 1);
+
+ *p++ = 0x80;
+ if (padding < 0) {
+ memset(p, 0x00, padding + sizeof (uint64_t));
+ md4_transform_helper(mctx);
+ p = (char *)mctx->block;
+ padding = 56;
+ }
+
+ memset(p, 0, padding);
+ mctx->block[14] = mctx->byte_count << 3;
+ mctx->block[15] = mctx->byte_count >> 29;
+ le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
+ sizeof(uint64_t)) / sizeof(uint32_t));
+ md4_transform(mctx->hash, mctx->block);
+ cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t));
+
+ snprintf(out, len, "%08X%08X%08X%08X",
+ mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
+}
+
+static inline void add_char(unsigned char c, struct md4_ctx *md)
+{
+ md4_update(md, &c, 1);
+}
+
+static int parse_string(const char *file, unsigned long len,
+ struct md4_ctx *md)
+{
+ unsigned long i;
+
+ add_char(file[0], md);
+ for (i = 1; i < len; i++) {
+ add_char(file[i], md);
+ if (file[i] == '"' && file[i-1] != '\\')
+ break;
+ }
+ return i;
+}
+
+static int parse_comment(const char *file, unsigned long len)
+{
+ unsigned long i;
+
+ for (i = 2; i < len; i++) {
+ if (file[i-1] == '*' && file[i] == '/')
+ break;
+ }
+ return i;
+}
+
+/* FIXME: Handle .s files differently (eg. # starts comments) --RR */
+static int parse_file(const char *fname, struct md4_ctx *md)
+{
+ char *file;
+ unsigned long i, len;
+
+ file = grab_file(fname, &len);
+ if (!file)
+ return 0;
+
+ for (i = 0; i < len; i++) {
+ /* Collapse and ignore \ and CR. */
+ if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
+ i++;
+ continue;
+ }
+
+ /* Ignore whitespace */
+ if (isspace(file[i]))
+ continue;
+
+ /* Handle strings as whole units */
+ if (file[i] == '"') {
+ i += parse_string(file+i, len - i, md);
+ continue;
+ }
+
+ /* Comments: ignore */
+ if (file[i] == '/' && file[i+1] == '*') {
+ i += parse_comment(file+i, len - i);
+ continue;
+ }
+
+ add_char(file[i], md);
+ }
+ release_file(file, len);
+ return 1;
+}
+
+/* We have dir/file.o. Open dir/.file.o.cmd, look for deps_ line to
+ * figure out source file. */
+static int parse_source_files(const char *objfile, struct md4_ctx *md)
+{
+ char *cmd, *file, *p, *end;
+ const char *base;
+ unsigned long flen;
+ int dirlen, ret = 0;
+
+ cmd = malloc(strlen(objfile) + sizeof("..cmd"));
+
+ base = strrchr(objfile, '/');
+ if (base) {
+ base++;
+ dirlen = base - objfile;
+ sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
+ } else {
+ dirlen = 0;
+ sprintf(cmd, ".%s.cmd", objfile);
+ }
+
+ file = grab_file(cmd, &flen);
+ if (!file) {
+ fprintf(stderr, "Warning: could not find %s for %s\n",
+ cmd, objfile);
+ goto out;
+ }
+
+ /* There will be a line like so:
+ deps_drivers/net/dummy.o := \
+ drivers/net/dummy.c \
+ $(wildcard include/config/net/fastroute.h) \
+ include/linux/config.h \
+ $(wildcard include/config/h.h) \
+ include/linux/module.h \
+
+ Sum all files in the same dir or subdirs.
+ */
+ /* Strictly illegal: file is not nul terminated. */
+ p = strstr(file, "\ndeps_");
+ if (!p) {
+ fprintf(stderr, "Warning: could not find deps_ line in %s\n",
+ cmd);
+ goto out_file;
+ }
+ p = strstr(p, ":=");
+ if (!p) {
+ fprintf(stderr, "Warning: could not find := line in %s\n",
+ cmd);
+ goto out_file;
+ }
+ p += strlen(":=");
+ p += strspn(p, " \\\n");
+
+ end = strstr(p, "\n\n");
+ if (!end) {
+ fprintf(stderr, "Warning: could not find end line in %s\n",
+ cmd);
+ goto out_file;
+ }
+
+ while (p < end) {
+ unsigned int len;
+
+ len = strcspn(p, " \\\n");
+ if (memcmp(objfile, p, dirlen) == 0) {
+ char source[len + 1];
+
+ memcpy(source, p, len);
+ source[len] = '\0';
+ printf("parsing %s\n", source);
+ if (!parse_file(source, md)) {
+ fprintf(stderr,
+ "Warning: could not open %s: %s\n",
+ source, strerror(errno));
+ goto out_file;
+ }
+ }
+ p += len;
+ p += strspn(p, " \\\n");
+ }
+
+ /* Everyone parsed OK */
+ ret = 1;
+out_file:
+ release_file(file, flen);
+out:
+ free(cmd);
+ return ret;
+}
+
+static int get_version(const char *modname, char sum[])
+{
+ void *file;
+ unsigned long len;
+ int ret = 0;
+ struct md4_ctx md;
+ char *sources, *end, *fname;
+ const char *basename;
+ char filelist[sizeof(".tmp_versions/%s.mod") + strlen(modname)];
+
+ /* Source files for module are in .tmp_versions/modname.mod,
+ after the first line. */
+ if (strrchr(modname, '/'))
+ basename = strrchr(modname, '/') + 1;
+ else
+ basename = modname;
+ sprintf(filelist, ".tmp_versions/%s", basename);
+ /* Truncate .o, add .mod */
+ strcpy(filelist + strlen(filelist)-2, ".mod");
+
+ file = grab_file(filelist, &len);
+ if (!file) {
+ fprintf(stderr, "Warning: could not find versions for %s\n",
+ filelist);
+ return 0;
+ }
+
+ sources = strchr(file, '\n');
+ if (!sources) {
+ fprintf(stderr, "Warning: malformed versions file for %s\n",
+ modname);
+ goto release;
+ }
+
+ sources++;
+ end = strchr(sources, '\n');
+ if (!end) {
+ fprintf(stderr, "Warning: bad ending versions file for %s\n",
+ modname);
+ goto release;
+ }
+ *end = '\0';
+
+ md4_init(&md);
+ for (fname = strtok(sources, " "); fname; fname = strtok(NULL, " ")) {
+ if (!parse_source_files(fname, &md))
+ goto release;
+ }
+
+ /* sum is of form \0<padding>. */
+ md4_final_ascii(&md, sum, 1 + strlen(sum+1));
+ ret = 1;
+release:
+ release_file(file, len);
+ return ret;
+}
+
+static void write_version(const char *filename, const char *sum,
+ unsigned long offset)
+{
+ int fd;
+
+ fd = open(filename, O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "Warning: changing sum in %s failed: %s\n",
+ filename, strerror(errno));
+ return;
+ }
+
+ if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
+ fprintf(stderr, "Warning: changing sum in %s:%lu failed: %s\n",
+ filename, offset, strerror(errno));
+ goto out;
+ }
+
+ if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) {
+ fprintf(stderr, "Warning: writing sum in %s failed: %s\n",
+ filename, strerror(errno));
+ goto out;
+ }
+out:
+ close(fd);
+}
+
+void strip_rcs_crap(char *version)
+{
+ unsigned int len, full_len;
+
+ if (strncmp(version, "$Revision", strlen("$Revision")) != 0)
+ return;
+
+ /* Space for version string follows. */
+ full_len = strlen(version) + strlen(version + strlen(version) + 1) + 2;
+
+ /* Move string to start with version number: prefix will be
+ * $Revision$ or $Revision: */
+ len = strlen("$Revision");
+ if (version[len] == ':' || version[len] == '$')
+ len++;
+ while (isspace(version[len]))
+ len++;
+ memmove(version, version+len, full_len-len);
+ full_len -= len;
+
+ /* Preserve up to next whitespace. */
+ len = 0;
+ while (version[len] && !isspace(version[len]))
+ len++;
+ memmove(version + len, version + strlen(version),
+ full_len - strlen(version));
+}
+
+/* If the modinfo contains a "version" value, then set this. */
+void maybe_frob_version(const char *modfilename,
+ void *modinfo,
+ unsigned long modinfo_len,
+ unsigned long modinfo_offset)
+{
+ char *version, *csum;
+
+ version = get_modinfo(modinfo, modinfo_len, "version");
+ if (!version)
+ return;
+
+ /* RCS $Revision gets stripped out. */
+ strip_rcs_crap(version);
+
+ /* Check against double sumversion */
+ if (strchr(version, ' '))
+ return;
+
+ /* Version contains embedded NUL: second half has space for checksum */
+ csum = version + strlen(version);
+ *(csum++) = ' ';
+ if (get_version(modfilename, csum))
+ write_version(modfilename, version,
+ modinfo_offset + (version - (char *)modinfo));
+}
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