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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414#include <netinet/in.h>#ifdef __sun__#include <inttypes.h>#else#include <stdint.h>#endif#include <ctype.h>#include <errno.h>#include <string.h>#include <limits.h>
#include <xalloc.h>#include "modpost.h"
/* * 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, ARRAY_SIZE(ctx->block)); 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, ARRAY_SIZE(mctx->hash));
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 = read_text_file(fname); len = strlen(file);
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); } free(file); return 1;}/* Check whether the file is a static library or not */static bool is_static_library(const char *objfile){ int len = strlen(objfile);
return objfile[len - 2] == '.' && objfile[len - 1] == 'a';}
/* We have dir/file.o. Open dir/.file.o.cmd, look for source_ and deps_ line * to figure out source files. */static int parse_source_files(const char *objfile, struct md4_ctx *md){ char *cmd, *file, *line, *dir, *pos; const char *base; int dirlen, ret = 0, check_files = 0;
cmd = xmalloc(strlen(objfile) + sizeof("..cmd"));
base = get_basename(objfile); dirlen = base - objfile; sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
dir = xmalloc(dirlen + 1); strncpy(dir, objfile, dirlen); dir[dirlen] = '\0';
file = read_text_file(cmd);
pos = file;
/* Sum all files in the same dir or subdirs. */ while ((line = get_line(&pos))) { char* p;
/* trim the leading spaces away */ while (isspace(*line)) line++; p = line;
if (strstarts(line, "source_")) { p = strrchr(line, ' '); if (!p) { warn("malformed line: %s\n", line); goto out_file; } p++; if (!parse_file(p, md)) { warn("could not open %s: %s\n", p, strerror(errno)); goto out_file; } continue; } if (strstarts(line, "deps_")) { check_files = 1; continue; } if (!check_files) continue;
/* Continue until line does not end with '\' */ if ( *(p + strlen(p)-1) != '\\') break; /* Terminate line at first space, to get rid of final ' \' */ while (*p) { if (isspace(*p)) { *p = '\0'; break; } p++; }
/* Check if this file is in same dir as objfile */ if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) { if (!parse_file(line, md)) { warn("could not open %s: %s\n", line, strerror(errno)); goto out_file; }
}
}
/* Everyone parsed OK */ ret = 1;out_file: free(file); free(dir); free(cmd); return ret;}
/* Calc and record src checksum. */void get_src_version(const char *modname, char sum[], unsigned sumlen){ char *buf, *pos; struct md4_ctx md; char *fname; char filelist[PATH_MAX + 1];
/* objects for a module are listed in the first line of *.mod file. */ snprintf(filelist, sizeof(filelist), "%s.mod", modname);
buf = read_text_file(filelist); pos = buf;
md4_init(&md); while ((fname = strsep(&pos, "\n"))) { if (!*fname) continue; if (!(is_static_library(fname)) && !parse_source_files(fname, &md)) goto free; }
md4_final_ascii(&md, sum, sumlen);free: free(buf);}