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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6324 | serge | 1 | /* ldbuildid.c - Build Id support routines |
| 2 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
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| 3 | |||
| 4 | This file is part of the GNU Binutils. |
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| 5 | |||
| 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 3 of the License, or |
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| 9 | (at your option) any later version. |
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| 10 | |||
| 11 | This program is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |||
| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with this program; if not, write to the Free Software |
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| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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| 19 | MA 02110-1301, USA. */ |
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| 20 | |||
| 21 | #include "sysdep.h" |
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| 22 | #include "bfd.h" |
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| 23 | #include "safe-ctype.h" |
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| 24 | #include "md5.h" |
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| 25 | #include "sha1.h" |
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| 26 | #include "ldbuildid.h" |
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| 27 | |||
| 28 | #define streq(a,b) strcmp ((a), (b)) == 0 |
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| 29 | #define strneq(a,b,n) strncmp ((a), (b), (n)) == 0 |
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| 30 | |||
| 31 | bfd_boolean |
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| 32 | validate_build_id_style (const char *style) |
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| 33 | { |
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| 34 | if ((streq (style, "md5")) || (streq (style, "sha1")) |
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| 35 | #ifndef __MINGW32__ |
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| 36 | || (streq (style, "uuid")) |
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| 37 | #endif |
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| 38 | || (strneq (style, "0x", 2))) |
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| 39 | return TRUE; |
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| 40 | |||
| 41 | return FALSE; |
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| 42 | } |
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| 43 | |||
| 44 | bfd_size_type |
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| 45 | compute_build_id_size (const char *style) |
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| 46 | { |
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| 47 | if (streq (style, "md5") || streq (style, "uuid")) |
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| 48 | return 128 / 8; |
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| 49 | |||
| 50 | if (streq (style, "sha1")) |
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| 51 | return 160 / 8; |
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| 52 | |||
| 53 | if (strneq (style, "0x", 2)) |
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| 54 | { |
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| 55 | bfd_size_type size = 0; |
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| 56 | /* ID is in string form (hex). Count the bytes. */ |
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| 57 | const char *id = style + 2; |
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| 58 | |||
| 59 | do |
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| 60 | { |
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| 61 | if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])) |
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| 62 | { |
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| 63 | ++size; |
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| 64 | id += 2; |
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| 65 | } |
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| 66 | else if (*id == '-' || *id == ':') |
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| 67 | ++id; |
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| 68 | else |
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| 69 | { |
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| 70 | size = 0; |
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| 71 | break; |
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| 72 | } |
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| 73 | } while (*id != '\0'); |
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| 74 | return size; |
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| 75 | } |
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| 76 | |||
| 77 | return 0; |
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| 78 | } |
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| 79 | |||
| 80 | static unsigned char |
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| 81 | read_hex (const char xdigit) |
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| 82 | { |
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| 83 | if (ISDIGIT (xdigit)) |
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| 84 | return xdigit - '0'; |
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| 85 | |||
| 86 | if (ISUPPER (xdigit)) |
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| 87 | return xdigit - 'A' + 0xa; |
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| 88 | |||
| 89 | if (ISLOWER (xdigit)) |
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| 90 | return xdigit - 'a' + 0xa; |
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| 91 | |||
| 92 | abort (); |
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| 93 | return 0; |
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| 94 | } |
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| 95 | |||
| 96 | bfd_boolean |
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| 97 | generate_build_id (bfd *abfd, |
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| 98 | const char *style, |
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| 99 | checksum_fn checksum_contents, |
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| 100 | unsigned char *id_bits, |
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| 101 | int size ATTRIBUTE_UNUSED) |
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| 102 | { |
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| 103 | if (streq (style, "md5")) |
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| 104 | { |
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| 105 | struct md5_ctx ctx; |
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| 106 | |||
| 107 | md5_init_ctx (&ctx); |
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| 108 | if (!(*checksum_contents) (abfd, (sum_fn) &md5_process_bytes, &ctx)) |
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| 109 | return FALSE; |
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| 110 | md5_finish_ctx (&ctx, id_bits); |
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| 111 | } |
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| 112 | else if (streq (style, "sha1")) |
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| 113 | { |
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| 114 | struct sha1_ctx ctx; |
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| 115 | |||
| 116 | sha1_init_ctx (&ctx); |
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| 117 | if (!(*checksum_contents) (abfd, (sum_fn) &sha1_process_bytes, &ctx)) |
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| 118 | return FALSE; |
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| 119 | sha1_finish_ctx (&ctx, id_bits); |
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| 120 | } |
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| 121 | #ifndef __MINGW32__ |
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| 122 | else if (streq (style, "uuid")) |
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| 123 | { |
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| 124 | int n; |
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| 125 | int fd = open ("/dev/urandom", O_RDONLY); |
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| 126 | |||
| 127 | if (fd < 0) |
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| 128 | return FALSE; |
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| 129 | n = read (fd, id_bits, size); |
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| 130 | close (fd); |
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| 131 | if (n < size) |
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| 132 | return FALSE; |
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| 133 | } |
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| 134 | #endif |
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| 135 | else if (strneq (style, "0x", 2)) |
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| 136 | { |
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| 137 | /* ID is in string form (hex). Convert to bits. */ |
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| 138 | const char *id = style + 2; |
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| 139 | size_t n = 0; |
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| 140 | |||
| 141 | do |
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| 142 | { |
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| 143 | if (ISXDIGIT (id[0]) && ISXDIGIT (id[1])) |
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| 144 | { |
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| 145 | id_bits[n] = read_hex (*id++) << 4; |
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| 146 | id_bits[n++] |= read_hex (*id++); |
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| 147 | } |
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| 148 | else if (*id == '-' || *id == ':') |
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| 149 | ++id; |
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| 150 | else |
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| 151 | abort (); /* Should have been validated earlier. */ |
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| 152 | } while (*id != '\0'); |
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| 153 | } |
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| 154 | else |
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| 155 | abort (); /* Should have been validated earlier. */ |
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| 156 | |||
| 157 | return TRUE; |
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| 158 | } |