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author | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
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committer | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
commit | e8bd88d1fcded01ccd066572eeaae1b507989cb3 (patch) | |
tree | c8e7be6c07c6f635f6e803e6a6ba9e7a95fee7c0 /gl/af_alg.h | |
parent | 2ad962c13473607ca0d974bfaa516a0ed53ec73d (diff) | |
download | monitoring-plugins-e8bd88d1fcded01ccd066572eeaae1b507989cb3.tar.gz |
Sync with the latest Gnulib code 668c0b8ffa
Diffstat (limited to 'gl/af_alg.h')
-rw-r--r-- | gl/af_alg.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/gl/af_alg.h b/gl/af_alg.h new file mode 100644 index 00000000..e8ffb3f7 --- /dev/null +++ b/gl/af_alg.h | |||
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1 | /* af_alg.h - Compute message digests from file streams and buffers. | ||
2 | Copyright (C) 2018-2023 Free Software Foundation, Inc. | ||
3 | |||
4 | This file is free software: you can redistribute it and/or modify | ||
5 | it under the terms of the GNU Lesser General Public License as | ||
6 | published by the Free Software Foundation; either version 2.1 of the | ||
7 | License, or (at your option) any later version. | ||
8 | |||
9 | This file is distributed in the hope that it will be useful, | ||
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | GNU Lesser General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU Lesser General Public License | ||
15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | ||
16 | |||
17 | /* Written by Matteo Croce <mcroce@redhat.com>, 2018. | ||
18 | Documentation by Bruno Haible <bruno@clisp.org>, 2018. */ | ||
19 | |||
20 | /* Declare specific functions for computing message digests | ||
21 | using the Linux kernel crypto API, if available. This kernel API gives | ||
22 | access to specialized crypto instructions (that would also be available | ||
23 | in user space) or to crypto devices (not directly available in user space). | ||
24 | |||
25 | For a more complete set of facilities that use the Linux kernel crypto API, | ||
26 | look at libkcapi. */ | ||
27 | |||
28 | #ifndef AF_ALG_H | ||
29 | # define AF_ALG_H 1 | ||
30 | |||
31 | # include <stdio.h> | ||
32 | # include <errno.h> | ||
33 | |||
34 | # ifdef __cplusplus | ||
35 | extern "C" { | ||
36 | # endif | ||
37 | |||
38 | # if USE_LINUX_CRYPTO_API | ||
39 | |||
40 | /* Compute a message digest of a memory region. | ||
41 | |||
42 | The memory region starts at BUFFER and is LEN bytes long. | ||
43 | |||
44 | ALG is the message digest algorithm; see the file /proc/crypto. | ||
45 | |||
46 | RESBLOCK points to a block of HASHLEN bytes, for the result. | ||
47 | HASHLEN must be the length of the message digest, in bytes, in particular: | ||
48 | |||
49 | alg | hashlen | ||
50 | -------+-------- | ||
51 | md5 | 16 | ||
52 | sha1 | 20 | ||
53 | sha224 | 28 | ||
54 | sha256 | 32 | ||
55 | sha384 | 48 | ||
56 | sha512 | 64 | ||
57 | |||
58 | If successful, fill RESBLOCK and return 0. | ||
59 | Upon failure, return a negated error number. */ | ||
60 | int | ||
61 | afalg_buffer (const char *buffer, size_t len, const char *alg, | ||
62 | void *resblock, ssize_t hashlen); | ||
63 | |||
64 | /* Compute a message digest of data read from STREAM. | ||
65 | |||
66 | STREAM is an open file stream. The last operation on STREAM should | ||
67 | not be 'ungetc', and if STREAM is also open for writing it should | ||
68 | have been fflushed since its last write. Read from the current | ||
69 | position to the end of STREAM. Handle regular files efficiently. | ||
70 | |||
71 | ALG is the message digest algorithm; see the file /proc/crypto. | ||
72 | |||
73 | RESBLOCK points to a block of HASHLEN bytes, for the result. | ||
74 | HASHLEN must be the length of the message digest, in bytes, in particular: | ||
75 | |||
76 | alg | hashlen | ||
77 | -------+-------- | ||
78 | md5 | 16 | ||
79 | sha1 | 20 | ||
80 | sha224 | 28 | ||
81 | sha256 | 32 | ||
82 | sha384 | 48 | ||
83 | sha512 | 64 | ||
84 | |||
85 | If successful, fill RESBLOCK and return 0. | ||
86 | Upon failure, return a negated error number. | ||
87 | Unless returning 0 or -EIO, restore STREAM's file position so that | ||
88 | the caller can fall back on some other method. */ | ||
89 | int | ||
90 | afalg_stream (FILE *stream, const char *alg, | ||
91 | void *resblock, ssize_t hashlen); | ||
92 | |||
93 | # else | ||
94 | |||
95 | static inline int | ||
96 | afalg_buffer (const char *buffer, size_t len, const char *alg, | ||
97 | void *resblock, ssize_t hashlen) | ||
98 | { | ||
99 | return -EAFNOSUPPORT; | ||
100 | } | ||
101 | |||
102 | static inline int | ||
103 | afalg_stream (FILE *stream, const char *alg, | ||
104 | void *resblock, ssize_t hashlen) | ||
105 | { | ||
106 | return -EAFNOSUPPORT; | ||
107 | } | ||
108 | |||
109 | # endif | ||
110 | |||
111 | # ifdef __cplusplus | ||
112 | } | ||
113 | # endif | ||
114 | |||
115 | #endif /* AF_ALG_H */ | ||