| 1 | /* ldbuildid.c - Build Id support routines |
| 2 | Copyright (C) 2013-2016 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of the GNU Binutils. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "md5.h" |
| 25 | #include "sha1.h" |
| 26 | #include "ldbuildid.h" |
| 27 | #ifdef __MINGW32__ |
| 28 | #include <windows.h> |
| 29 | #include <rpcdce.h> |
| 30 | #endif |
| 31 | |
| 32 | #define streq(a,b) strcmp ((a), (b)) == 0 |
| 33 | #define strneq(a,b,n) strncmp ((a), (b), (n)) == 0 |
| 34 | |
| 35 | bfd_boolean |
| 36 | validate_build_id_style (const char *style) |
| 37 | { |
| 38 | if ((streq (style, "md5")) || (streq (style, "sha1")) |
| 39 | || (streq (style, "uuid")) || (strneq (style, "0x", 2))) |
| 40 | return TRUE; |
| 41 | |
| 42 | return FALSE; |
| 43 | } |
| 44 | |
| 45 | bfd_size_type |
| 46 | compute_build_id_size (const char *style) |
| 47 | { |
| 48 | if (streq (style, "md5") || streq (style, "uuid")) |
| 49 | return 128 / 8; |
| 50 | |
| 51 | if (streq (style, "sha1")) |
| 52 | return 160 / 8; |
| 53 | |
| 54 | if (strneq (style, "0x", 2)) |
| 55 | { |
| 56 | bfd_size_type size = 0; |
| 57 | /* ID is in string form (hex). Count the bytes. */ |
| 58 | const char *id = style + 2; |
| 59 | |
| 60 | do |
| 61 | { |
| 62 | if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])) |
| 63 | { |
| 64 | ++size; |
| 65 | id += 2; |
| 66 | } |
| 67 | else if (*id == '-' || *id == ':') |
| 68 | ++id; |
| 69 | else |
| 70 | { |
| 71 | size = 0; |
| 72 | break; |
| 73 | } |
| 74 | } while (*id != '\0'); |
| 75 | return size; |
| 76 | } |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | static unsigned char |
| 82 | read_hex (const char xdigit) |
| 83 | { |
| 84 | if (ISDIGIT (xdigit)) |
| 85 | return xdigit - '0'; |
| 86 | |
| 87 | if (ISUPPER (xdigit)) |
| 88 | return xdigit - 'A' + 0xa; |
| 89 | |
| 90 | if (ISLOWER (xdigit)) |
| 91 | return xdigit - 'a' + 0xa; |
| 92 | |
| 93 | abort (); |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | bfd_boolean |
| 98 | generate_build_id (bfd *abfd, |
| 99 | const char *style, |
| 100 | checksum_fn checksum_contents, |
| 101 | unsigned char *id_bits, |
| 102 | int size ATTRIBUTE_UNUSED) |
| 103 | { |
| 104 | if (streq (style, "md5")) |
| 105 | { |
| 106 | struct md5_ctx ctx; |
| 107 | |
| 108 | md5_init_ctx (&ctx); |
| 109 | if (!(*checksum_contents) (abfd, (sum_fn) &md5_process_bytes, &ctx)) |
| 110 | return FALSE; |
| 111 | md5_finish_ctx (&ctx, id_bits); |
| 112 | } |
| 113 | else if (streq (style, "sha1")) |
| 114 | { |
| 115 | struct sha1_ctx ctx; |
| 116 | |
| 117 | sha1_init_ctx (&ctx); |
| 118 | if (!(*checksum_contents) (abfd, (sum_fn) &sha1_process_bytes, &ctx)) |
| 119 | return FALSE; |
| 120 | sha1_finish_ctx (&ctx, id_bits); |
| 121 | } |
| 122 | else if (streq (style, "uuid")) |
| 123 | { |
| 124 | #ifndef __MINGW32__ |
| 125 | int n; |
| 126 | int fd = open ("/dev/urandom", O_RDONLY); |
| 127 | |
| 128 | if (fd < 0) |
| 129 | return FALSE; |
| 130 | n = read (fd, id_bits, size); |
| 131 | close (fd); |
| 132 | if (n < size) |
| 133 | return FALSE; |
| 134 | #else /* __MINGW32__ */ |
| 135 | typedef RPC_STATUS (RPC_ENTRY * UuidCreateFn) (UUID *); |
| 136 | UUID uuid; |
| 137 | UuidCreateFn uuid_create = 0; |
| 138 | HMODULE rpc_library = LoadLibrary ("rpcrt4.dll"); |
| 139 | |
| 140 | if (!rpc_library) |
| 141 | return FALSE; |
| 142 | uuid_create = (UuidCreateFn) GetProcAddress (rpc_library, "UuidCreate"); |
| 143 | if (!uuid_create) |
| 144 | { |
| 145 | FreeLibrary (rpc_library); |
| 146 | return FALSE; |
| 147 | } |
| 148 | |
| 149 | if (uuid_create (&uuid) != RPC_S_OK) |
| 150 | { |
| 151 | FreeLibrary (rpc_library); |
| 152 | return FALSE; |
| 153 | } |
| 154 | FreeLibrary (rpc_library); |
| 155 | memcpy (id_bits, &uuid, |
| 156 | (size_t) size < sizeof (UUID) ? (size_t) size : sizeof (UUID)); |
| 157 | #endif /* __MINGW32__ */ |
| 158 | } |
| 159 | else if (strneq (style, "0x", 2)) |
| 160 | { |
| 161 | /* ID is in string form (hex). Convert to bits. */ |
| 162 | const char *id = style + 2; |
| 163 | size_t n = 0; |
| 164 | |
| 165 | do |
| 166 | { |
| 167 | if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])) |
| 168 | { |
| 169 | id_bits[n] = read_hex (*id++) << 4; |
| 170 | id_bits[n++] |= read_hex (*id++); |
| 171 | } |
| 172 | else if (*id == '-' || *id == ':') |
| 173 | ++id; |
| 174 | else |
| 175 | abort (); /* Should have been validated earlier. */ |
| 176 | } |
| 177 | while (*id != '\0'); |
| 178 | } |
| 179 | else |
| 180 | abort (); /* Should have been validated earlier. */ |
| 181 | |
| 182 | return TRUE; |
| 183 | } |