Файловый менеджер

Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200-generic/scripts/mod/sumversion.c

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#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 "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, 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; } /* Check whether the file is a static library or not / static int is_static_library(const char objfile) { int len = strlen(objfile); if (objfile[len - 2] == '.' && objfile[len - 1] == 'a') return 1; else return 0; } /* 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; const char base; unsigned long flen, pos = 0; int dirlen, ret = 0, check_files = 0; cmd = NOFAIL(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); } dir = NOFAIL(malloc(dirlen + 1)); strncpy(dir, objfile, dirlen); dir[dirlen] = '\0'; file = grab_file(cmd, &flen); if (!file) { warn("could not find %s for %s\n", cmd, objfile); goto out; } / Sum all files in the same dir or subdirs. / while ((line = get_next_line(&pos, file, flen)) != NULL) { char p = line; if (strncmp(line, "source_", sizeof("source_")-1) == 0) { 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 (strncmp(line, "deps_", sizeof("deps_")-1) == 0) { 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: release_file(file, flen); out: free(dir); free(cmd); return ret; } / Calc and record src checksum. / void get_src_version(const char modname, char sum[], unsigned sumlen) { void file; unsigned long len; struct md4_ctx md; char sources, end, fname; char filelist[PATH_MAX + 1]; /* objects for a module are listed in the first line of .mod file. / snprintf(filelist, sizeof(filelist), "%.smod", (int)strlen(modname) - 1, modname); file = grab_file(filelist, &len); if (!file) / not a module or .mod file missing - ignore / return; sources = file; end = strchr(sources, '\n'); if (!end) { warn("bad ending versions file for %s\n", modname); goto release; } end = '\0'; md4_init(&md); while ((fname = strsep(&sources, " ")) != NULL) { if (!fname) continue; if (!(is_static_library(fname)) && !parse_source_files(fname, &md)) goto release; } md4_final_ascii(&md, sum, sumlen); release: release_file(file, len); } static void write_version(const char filename, const char sum, unsigned long offset) { int fd; fd = open(filename, O_RDWR); if (fd < 0) { warn("changing sum in %s failed: %s\n", filename, strerror(errno)); return; } if (lseek(fd, offset, SEEK_SET) == (off_t)-1) { warn("changing sum in %s:%lu failed: %s\n", filename, offset, strerror(errno)); goto out; } if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) { warn("writing sum in %s failed: %s\n", filename, strerror(errno)); goto out; } out: close(fd); } static int strip_rcs_crap(char version) { unsigned int len, full_len; if (strncmp(version, "$Revision", strlen("$Revision")) != 0) return 0; /* 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)); return 1; } / Clean up RCS-style version numbers. / void maybe_frob_rcs_version(const char modfilename, char version, void modinfo, unsigned long version_offset) { if (strip_rcs_crap(version)) write_version(modfilename, version, version_offset); }

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