package/busybox/patches/913-libbb_hash.patch

   1 #
   2 # expose (again) an hash_fd function (used 911-ipkg.patch)
   3 #
   4 diff -ruN busybox-1.1.1-old/coreutils/md5_sha1_sum.c busybox-1.1.1-new/coreutils/md5_sha1_sum.c
   5 --- busybox-1.1.1-old/coreutils/md5_sha1_sum.c  2006-03-30 00:14:50.000000000 +0200
   6 +++ busybox-1.1.1-new/coreutils/md5_sha1_sum.c  2006-03-29 23:46:51.000000000 +0200
   7 @@ -15,80 +15,10 @@
   8
   9  #include "busybox.h"
  10
  11 -typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
  12 -
  13  #define FLAG_SILENT    1
  14  #define FLAG_CHECK     2
  15  #define FLAG_WARN      4
  16
  17 -/* This might be useful elsewhere */
  18 -static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
  19 -                                                                         unsigned char hash_length)
  20 -{
  21 -       int x, len, max;
  22 -       unsigned char *hex_value;
  23 -
  24 -       max = (hash_length * 2) + 2;
  25 -       hex_value = xmalloc(max);
  26 -       for (x = len = 0; x < hash_length; x++) {
  27 -               len += snprintf((char*)(hex_value + len), max - len, "%02x", hash_value[x]);
  28 -       }
  29 -       return (hex_value);
  30 -}
  31 -
  32 -static uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
  33 -{
  34 -       int src_fd, hash_len, count;
  35 -       union _ctx_ {
  36 -               sha1_ctx_t sha1;
  37 -               md5_ctx_t md5;
  38 -       } context;
  39 -       uint8_t *hash_value = NULL;
  40 -       RESERVE_CONFIG_UBUFFER(in_buf, 4096);
  41 -       void (*update)(const void*, size_t, void*);
  42 -       void (*final)(void*, void*);
  43 -
  44 -       if(strcmp(filename, "-") == 0) {
  45 -               src_fd = STDIN_FILENO;
  46 -       } else if(0 > (src_fd = open(filename, O_RDONLY))) {
  47 -               bb_perror_msg("%s", filename);
  48 -               return NULL;
  49 -       }
  50 -
  51 -       // figure specific hash algorithims
  52 -       if(ENABLE_MD5SUM && hash_algo==HASH_MD5) {
  53 -               md5_begin(&context.md5);
  54 -               update = (void (*)(const void*, size_t, void*))md5_hash;
  55 -               final = (void (*)(void*, void*))md5_end;
  56 -               hash_len = 16;
  57 -       } else if(ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
  58 -               sha1_begin(&context.sha1);
  59 -               update = (void (*)(const void*, size_t, void*))sha1_hash;
  60 -               final = (void (*)(void*, void*))sha1_end;
  61 -               hash_len = 20;
  62 -       } else {
  63 -               bb_error_msg_and_die("algotithm not supported");
  64 -       }
  65 -
  66 -
  67 -       while(0 < (count = read(src_fd, in_buf, sizeof in_buf))) {
  68 -               update(in_buf, count, &context);
  69 -       }
  70 -
  71 -       if(count == 0) {
  72 -               final(in_buf, &context);
  73 -               hash_value = hash_bin_to_hex(in_buf, hash_len);
  74 -       }
  75 -
  76 -       RELEASE_CONFIG_BUFFER(in_buf);
  77 -
  78 -       if(src_fd != STDIN_FILENO) {
  79 -               close(src_fd);
  80 -       }
  81 -
  82 -       return hash_value;
  83 -}
  84 -
  85  /* This could become a common function for md5 as well, by using md5_stream */
  86  static int hash_files(int argc, char **argv, hash_algo_t hash_algo)
  87  {
  88 diff -ruN busybox-1.1.1-old/include/libbb.h busybox-1.1.1-new/include/libbb.h
  89 --- busybox-1.1.1-old/include/libbb.h   2006-03-30 00:14:50.000000000 +0200
  90 +++ busybox-1.1.1-new/include/libbb.h   2006-03-30 00:31:48.000000000 +0200
  91 @@ -490,6 +490,12 @@
  92  void md5_hash(const void *data, size_t length, md5_ctx_t *ctx);
  93  void *md5_end(void *resbuf, md5_ctx_t *ctx);
  94
  95 +typedef enum { HASH_SHA1, HASH_MD5 } hash_algo_t;
  96 +
  97 +unsigned char *hash_bin_to_hex(unsigned char *hash_value, unsigned char hash_length);
  98 +int hash_fd(int fd, hash_algo_t hash_algo, uint8_t *hash_value);
  99 +uint8_t *hash_file(const char *filename, hash_algo_t hash_algo);
 100 +
 101  /* busybox.h will include dmalloc later for us, else include it here.  */
 102  #if !defined _BB_INTERNAL_H_ && defined DMALLOC
 103  #include <dmalloc.h>
 104 diff -ruN busybox-1.1.1-old/libbb/Makefile.in busybox-1.1.1-new/libbb/Makefile.in
 105 --- busybox-1.1.1-old/libbb/Makefile.in 2006-03-30 00:14:50.000000000 +0200
 106 +++ busybox-1.1.1-new/libbb/Makefile.in 2006-03-29 23:46:51.000000000 +0200
 107 @@ -11,6 +11,7 @@
 108
 109  LIBBB-n:=
 110  LIBBB-y:= \
 111 +       hash.c \
 112         bb_asprintf.c ask_confirmation.c change_identity.c chomp.c \
 113         compare_string_array.c concat_path_file.c copy_file.c copyfd.c \
 114         create_icmp_socket.c create_icmp6_socket.c \
 115 diff -ruN busybox-1.1.1-old/libbb/hash.c busybox-1.1.1-new/libbb/hash.c
 116 --- busybox-1.1.1-old/libbb/hash.c      1970-01-01 01:00:00.000000000 +0100
 117 +++ busybox-1.1.1-new/libbb/hash.c      2006-03-30 00:35:54.000000000 +0200
 118 @@ -0,0 +1,100 @@
 119 +/*
 120 + *  Copyright (C) 2003 Glenn L. McGrath
 121 + *  Copyright (C) 2003-2004 Erik Andersen
 122 + *
 123 + * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 124 + */
 125 +
 126 +#include <fcntl.h>
 127 +#include <limits.h>
 128 +#include <stdio.h>
 129 +#include <stdint.h>
 130 +#include <stdlib.h>
 131 +#include <string.h>
 132 +#include <unistd.h>
 133 +
 134 +#include "busybox.h"
 135 +
 136 +unsigned char *hash_bin_to_hex(unsigned char *hash_value, unsigned char hash_length)
 137 +{
 138 +       int x, len, max;
 139 +       unsigned char *hex_value;
 140 +
 141 +       max = (hash_length * 2) + 2;
 142 +       hex_value = xmalloc(max);
 143 +       for (x = len = 0; x < hash_length; x++) {
 144 +               len += snprintf((char*)(hex_value + len), max - len, "%02x", hash_value[x]);
 145 +       }
 146 +       return (hex_value);
 147 +}
 148 +
 149 +int hash_fd(int fd, hash_algo_t hash_algo, uint8_t *hash_value)
 150 +{
 151 +       int count, result = 0;
 152 +       union _ctx_ {
 153 +               sha1_ctx_t sha1;
 154 +               md5_ctx_t md5;
 155 +       } context;
 156 +       RESERVE_CONFIG_UBUFFER(in_buf, 4096);
 157 +       void (*update)(const void*, size_t, void*) = NULL;
 158 +       void (*final)(void*, void*) = NULL;
 159 +
 160 +       // figure specific hash algorithims
 161 +       if(hash_algo==HASH_MD5) {
 162 +               md5_begin(&context.md5);
 163 +               update = (void (*)(const void*, size_t, void*))md5_hash;
 164 +               final = (void (*)(void*, void*))md5_end;
 165 +       } else if(hash_algo==HASH_SHA1) {
 166 +               sha1_begin(&context.sha1);
 167 +               update = (void (*)(const void*, size_t, void*))sha1_hash;
 168 +               final = (void (*)(void*, void*))sha1_end;
 169 +       }
 170 +
 171 +
 172 +       while(0 < (count = read(fd, in_buf, sizeof in_buf))) {
 173 +               update(in_buf, count, &context);
 174 +               result += count;
 175 +       }
 176 +
 177 +       if(count == 0) {
 178 +               final(hash_value, &context);
 179 +       }
 180 +
 181 +       RELEASE_CONFIG_BUFFER(in_buf);
 182 +
 183 +       return result;
 184 +}
 185 +
 186 +uint8_t *hash_file(const char *filename, hash_algo_t hash_algo)
 187 +{
 188 +       int src_fd, hash_len;
 189 +       RESERVE_CONFIG_UBUFFER(hash_buf, 20);
 190 +       uint8_t *hash_value = NULL;
 191 +
 192 +       if(ENABLE_MD5SUM && hash_algo==HASH_MD5) {
 193 +               hash_len = 16;
 194 +       } else if(ENABLE_SHA1SUM && hash_algo==HASH_SHA1) {
 195 +               hash_len = 20;
 196 +       } else {
 197 +               bb_error_msg_and_die("algotithm not supported");
 198 +       }
 199 +
 200 +       if(strcmp(filename, "-") == 0) {
 201 +               src_fd = STDIN_FILENO;
 202 +       } else if(0 > (src_fd = open(filename, O_RDONLY))) {
 203 +               bb_perror_msg("%s", filename);
 204 +               return NULL;
 205 +       }
 206 +
 207 +       if(hash_fd(src_fd, hash_algo, hash_buf) > 0) {
 208 +               hash_value = hash_bin_to_hex(hash_buf, hash_len);
 209 +       }
 210 +
 211 +       if(src_fd != STDIN_FILENO) {
 212 +               close(src_fd);
 213 +       }
 214 +
 215 +       RELEASE_CONFIG_BUFFER(hash_buf);
 216 +
 217 +       return hash_value;
 218 +}