diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-11 00:51:23 -0500 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-11 00:51:23 -0500 |
commit | e7691a1ce341c80ed9504244a36b31c025217391 (patch) | |
tree | e9941bb350f64a726130e299c411821da6f41a53 /lib/mpi/mpi-cmp.c | |
parent | 5cd9599bba428762025db6027764f1c59d0b1e1b (diff) | |
parent | 8fcc99549522fc7a0bbaeb5755855ab0d9a59ce8 (diff) |
Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security
* 'for-linus' of git://selinuxproject.org/~jmorris/linux-security: (32 commits)
ima: fix invalid memory reference
ima: free duplicate measurement memory
security: update security_file_mmap() docs
selinux: Casting (void *) value returned by kmalloc is useless
apparmor: fix module parameter handling
Security: tomoyo: add .gitignore file
tomoyo: add missing rcu_dereference()
apparmor: add missing rcu_dereference()
evm: prevent racing during tfm allocation
evm: key must be set once during initialization
mpi/mpi-mpow: NULL dereference on allocation failure
digsig: build dependency fix
KEYS: Give key types their own lockdep class for key->sem
TPM: fix transmit_cmd error logic
TPM: NSC and TIS drivers X86 dependency fix
TPM: Export wait_for_stat for other vendor specific drivers
TPM: Use vendor specific function for status probe
tpm_tis: add delay after aborting command
tpm_tis: Check return code from getting timeouts/durations
tpm: Introduce function to poll for result of self test
...
Fix up trivial conflict in lib/Makefile due to addition of CONFIG_MPI
and SIGSIG next to CONFIG_DQL addition.
Diffstat (limited to 'lib/mpi/mpi-cmp.c')
-rw-r--r-- | lib/mpi/mpi-cmp.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/mpi/mpi-cmp.c b/lib/mpi/mpi-cmp.c new file mode 100644 index 000000000000..914bc42a8a80 --- /dev/null +++ b/lib/mpi/mpi-cmp.c | |||
@@ -0,0 +1,68 @@ | |||
1 | /* mpi-cmp.c - MPI functions | ||
2 | * Copyright (C) 1998, 1999 Free Software Foundation, Inc. | ||
3 | * | ||
4 | * This file is part of GnuPG. | ||
5 | * | ||
6 | * GnuPG 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 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | ||
19 | */ | ||
20 | |||
21 | #include "mpi-internal.h" | ||
22 | |||
23 | int mpi_cmp_ui(MPI u, unsigned long v) | ||
24 | { | ||
25 | mpi_limb_t limb = v; | ||
26 | |||
27 | mpi_normalize(u); | ||
28 | if (!u->nlimbs && !limb) | ||
29 | return 0; | ||
30 | if (u->sign) | ||
31 | return -1; | ||
32 | if (u->nlimbs > 1) | ||
33 | return 1; | ||
34 | |||
35 | if (u->d[0] == limb) | ||
36 | return 0; | ||
37 | else if (u->d[0] > limb) | ||
38 | return 1; | ||
39 | else | ||
40 | return -1; | ||
41 | } | ||
42 | |||
43 | int mpi_cmp(MPI u, MPI v) | ||
44 | { | ||
45 | mpi_size_t usize, vsize; | ||
46 | int cmp; | ||
47 | |||
48 | mpi_normalize(u); | ||
49 | mpi_normalize(v); | ||
50 | usize = u->nlimbs; | ||
51 | vsize = v->nlimbs; | ||
52 | if (!u->sign && v->sign) | ||
53 | return 1; | ||
54 | if (u->sign && !v->sign) | ||
55 | return -1; | ||
56 | if (usize != vsize && !u->sign && !v->sign) | ||
57 | return usize - vsize; | ||
58 | if (usize != vsize && u->sign && v->sign) | ||
59 | return vsize + usize; | ||
60 | if (!usize) | ||
61 | return 0; | ||
62 | cmp = mpihelp_cmp(u->d, v->d, usize); | ||
63 | if (!cmp) | ||
64 | return 0; | ||
65 | if ((cmp < 0 ? 1 : 0) == (u->sign ? 1 : 0)) | ||
66 | return 1; | ||
67 | return -1; | ||
68 | } | ||