159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
/* ldbuildid.c - Build Id support routines
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Copyright 2013, 2014 Free Software Foundation, Inc.
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "safe-ctype.h"
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#include "md5.h"
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#include "sha1.h"
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#include "ldbuildid.h"
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#define streq(a,b) strcmp ((a), (b)) == 0
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#define strneq(a,b,n) strncmp ((a), (b), (n)) == 0
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bfd_boolean
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validate_build_id_style (const char *style)
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{
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if ((streq (style, "md5")) || (streq (style, "sha1"))
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#ifndef __MINGW32__
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|| (streq (style, "uuid"))
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#endif
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|| (strneq (style, "0x", 2)))
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return TRUE;
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return FALSE;
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}
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bfd_size_type
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compute_build_id_size (const char *style)
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{
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if (streq (style, "md5") || streq (style, "uuid"))
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return 128 / 8;
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if (streq (style, "sha1"))
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return 160 / 8;
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if (strneq (style, "0x", 2))
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{
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bfd_size_type size = 0;
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/* ID is in string form (hex). Count the bytes. */
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const char *id = style + 2;
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do
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{
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if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
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{
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++size;
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id += 2;
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}
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else if (*id == '-' || *id == ':')
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++id;
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else
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{
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size = 0;
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break;
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}
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} while (*id != '\0');
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return size;
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}
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return 0;
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}
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static unsigned char
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read_hex (const char xdigit)
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{
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if (ISDIGIT (xdigit))
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return xdigit - '0';
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if (ISUPPER (xdigit))
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return xdigit - 'A' + 0xa;
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if (ISLOWER (xdigit))
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return xdigit - 'a' + 0xa;
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abort ();
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return 0;
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}
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bfd_boolean
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generate_build_id (bfd *abfd,
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const char *style,
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checksum_fn checksum_contents,
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unsigned char *id_bits,
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int size ATTRIBUTE_UNUSED)
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{
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if (streq (style, "md5"))
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{
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struct md5_ctx ctx;
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md5_init_ctx (&ctx);
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if (!(*checksum_contents) (abfd, (sum_fn) &md5_process_bytes, &ctx))
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return FALSE;
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md5_finish_ctx (&ctx, id_bits);
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}
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else if (streq (style, "sha1"))
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{
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struct sha1_ctx ctx;
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sha1_init_ctx (&ctx);
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if (!(*checksum_contents) (abfd, (sum_fn) &sha1_process_bytes, &ctx))
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return FALSE;
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sha1_finish_ctx (&ctx, id_bits);
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}
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#ifndef __MINGW32__
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else if (streq (style, "uuid"))
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{
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int n;
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int fd = open ("/dev/urandom", O_RDONLY);
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if (fd < 0)
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return FALSE;
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n = read (fd, id_bits, size);
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close (fd);
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if (n < size)
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return FALSE;
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}
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#endif
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else if (strneq (style, "0x", 2))
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{
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/* ID is in string form (hex). Convert to bits. */
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const char *id = style + 2;
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size_t n = 0;
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do
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{
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if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))
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{
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id_bits[n] = read_hex (*id++) << 4;
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id_bits[n++] |= read_hex (*id++);
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}
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else if (*id == '-' || *id == ':')
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++id;
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else
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abort (); /* Should have been validated earlier. */
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} while (*id != '\0');
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}
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else
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abort (); /* Should have been validated earlier. */
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return TRUE;
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}
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