1 /* ldbuildid.c - Build Id support routines
2 Copyright 2013, 2014 Free Software Foundation, Inc.
4 This file is part of the GNU Binutils.
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.
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.
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. */
23 #include "safe-ctype.h"
26 #include "ldbuildid.h"
28 #define streq(a,b) strcmp ((a), (b)) == 0
29 #define strneq(a,b,n) strncmp ((a), (b), (n)) == 0
32 validate_build_id_style (const char *style)
34 if ((streq (style, "md5")) || (streq (style, "sha1"))
36 || (streq (style, "uuid"))
38 || (strneq (style, "0x", 2)))
45 compute_build_id_size (const char *style)
47 if (streq (style, "md5") || streq (style, "uuid"))
50 if (streq (style, "sha1"))
53 if (strneq (style, "0x", 2))
55 bfd_size_type size = 0;
56 /* ID is in string form (hex). Count the bytes. */
57 const char *id = style + 2;
61 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
66 else if (*id == '-' || *id == ':')
73 } while (*id != '\0');
81 read_hex (const char xdigit)
87 return xdigit - 'A' + 0xa;
90 return xdigit - 'a' + 0xa;
97 generate_build_id (bfd *abfd,
99 checksum_fn checksum_contents,
100 unsigned char *id_bits,
101 int size ATTRIBUTE_UNUSED)
103 if (streq (style, "md5"))
108 if (!(*checksum_contents) (abfd, (sum_fn) &md5_process_bytes, &ctx))
110 md5_finish_ctx (&ctx, id_bits);
112 else if (streq (style, "sha1"))
116 sha1_init_ctx (&ctx);
117 if (!(*checksum_contents) (abfd, (sum_fn) &sha1_process_bytes, &ctx))
119 sha1_finish_ctx (&ctx, id_bits);
122 else if (streq (style, "uuid"))
125 int fd = open ("/dev/urandom", O_RDONLY);
129 n = read (fd, id_bits, size);
135 else if (strneq (style, "0x", 2))
137 /* ID is in string form (hex). Convert to bits. */
138 const char *id = style + 2;
143 if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
145 id_bits[n] = read_hex (*id++) << 4;
146 id_bits[n++] |= read_hex (*id++);
148 else if (*id == '-' || *id == ':')
151 abort (); /* Should have been validated earlier. */
152 } while (*id != '\0');
155 abort (); /* Should have been validated earlier. */