/usr/include/sodium/utils.h is in libsodium-dev 1.0.11-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | #ifndef sodium_utils_H
#define sodium_utils_H
#include <stddef.h>
#include "export.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef SODIUM_C99
# if defined(__cplusplus) || !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
# define SODIUM_C99(X)
# else
# define SODIUM_C99(X) X
# endif
#endif
SODIUM_EXPORT
void sodium_memzero(void * const pnt, const size_t len);
/*
* WARNING: sodium_memcmp() must be used to verify if two secret keys
* are equal, in constant time.
* It returns 0 if the keys are equal, and -1 if they differ.
* This function is not designed for lexicographical comparisons.
*/
SODIUM_EXPORT
int sodium_memcmp(const void * const b1_, const void * const b2_, size_t len)
__attribute__ ((warn_unused_result));
/*
* sodium_compare() returns -1 if b1_ < b2_, 1 if b1_ > b2_ and 0 if b1_ == b2_
* It is suitable for lexicographical comparisons, or to compare nonces
* and counters stored in little-endian format.
* However, it is slower than sodium_memcmp().
*/
SODIUM_EXPORT
int sodium_compare(const unsigned char *b1_, const unsigned char *b2_,
size_t len)
__attribute__ ((warn_unused_result));
SODIUM_EXPORT
int sodium_is_zero(const unsigned char *n, const size_t nlen);
SODIUM_EXPORT
void sodium_increment(unsigned char *n, const size_t nlen);
SODIUM_EXPORT
void sodium_add(unsigned char *a, const unsigned char *b, const size_t len);
SODIUM_EXPORT
char *sodium_bin2hex(char * const hex, const size_t hex_maxlen,
const unsigned char * const bin, const size_t bin_len);
SODIUM_EXPORT
int sodium_hex2bin(unsigned char * const bin, const size_t bin_maxlen,
const char * const hex, const size_t hex_len,
const char * const ignore, size_t * const bin_len,
const char ** const hex_end);
SODIUM_EXPORT
int sodium_mlock(void * const addr, const size_t len);
SODIUM_EXPORT
int sodium_munlock(void * const addr, const size_t len);
/* WARNING: sodium_malloc() and sodium_allocarray() are not general-purpose
* allocation functions.
*
* They return a pointer to a region filled with 0xd0 bytes, immediately
* followed by a guard page.
* As a result, accessing a single byte after the requested allocation size
* will intentionally trigger a segmentation fault.
*
* A canary and an additional guard page placed before the beginning of the
* region may also kill the process if a buffer underflow is detected.
*
* The memory layout is:
* [unprotected region size (read only)][guard page (no access)][unprotected pages (read/write)][guard page (no access)]
* With the layout of the unprotected pages being:
* [optional padding][16-bytes canary][user region]
*
* However:
* - These functions are significantly slower than standard functions
* - Each allocation requires 3 or 4 additional pages
* - The returned address will not be aligned if the allocation size is not
* a multiple of the required alignment. For this reason, these functions
* are designed to store data, such as secret keys and messages.
*
* sodium_malloc() can be used to allocate any libsodium data structure,
* with the exception of crypto_generichash_state.
*
* The crypto_generichash_state structure is packed and its length is
* either 357 or 361 bytes. For this reason, when using sodium_malloc() to
* allocate a crypto_generichash_state structure, padding must be added in
* order to ensure proper alignment:
* state = sodium_malloc((crypto_generichash_statebytes() + (size_t) 63U)
* & ~(size_t) 63U);
*/
SODIUM_EXPORT
void *sodium_malloc(const size_t size)
__attribute__ ((malloc));
SODIUM_EXPORT
void *sodium_allocarray(size_t count, size_t size)
__attribute__ ((malloc));
SODIUM_EXPORT
void sodium_free(void *ptr);
SODIUM_EXPORT
int sodium_mprotect_noaccess(void *ptr);
SODIUM_EXPORT
int sodium_mprotect_readonly(void *ptr);
SODIUM_EXPORT
int sodium_mprotect_readwrite(void *ptr);
/* -------- */
int _sodium_alloc_init(void);
#ifdef __cplusplus
}
#endif
#endif
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