mirror of
https://github.com/OpenFusionProject/OpenFusion.git
synced 2024-11-14 02:10:06 +00:00
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
#ifndef BCRYPT_H_
|
|
#define BCRYPT_H_
|
|
/*
|
|
* bcrypt wrapper library
|
|
*
|
|
* Written in 2011, 2013, 2014, 2015 by Ricardo Garcia <r@rg3.name>
|
|
*
|
|
* To the extent possible under law, the author(s) have dedicated all copyright
|
|
* and related and neighboring rights to this software to the public domain
|
|
* worldwide. This software is distributed without any warranty.
|
|
*
|
|
* You should have received a copy of the CC0 Public Domain Dedication along
|
|
* with this software. If not, see
|
|
* <http://creativecommons.org/publicdomain/zero/1.0/>.
|
|
*/
|
|
|
|
#define BCRYPT_HASHSIZE (64)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* This function expects a work factor between 4 and 31 and a char array to
|
|
* store the resulting generated salt. The char array should typically have
|
|
* BCRYPT_HASHSIZE bytes at least. If the provided work factor is not in the
|
|
* previous range, it will default to 12.
|
|
*
|
|
* The return value is zero if the salt could be correctly generated and
|
|
* nonzero otherwise.
|
|
*
|
|
*/
|
|
int bcrypt_gensalt(int workfactor, char salt[BCRYPT_HASHSIZE]);
|
|
|
|
/*
|
|
* This function expects a password to be hashed, a salt to hash the password
|
|
* with and a char array to leave the result. Both the salt and the hash
|
|
* parameters should have room for BCRYPT_HASHSIZE characters at least.
|
|
*
|
|
* It can also be used to verify a hashed password. In that case, provide the
|
|
* expected hash in the salt parameter and verify the output hash is the same
|
|
* as the input hash. However, to avoid timing attacks, it's better to use
|
|
* bcrypt_checkpw when verifying a password.
|
|
*
|
|
* The return value is zero if the password could be hashed and nonzero
|
|
* otherwise.
|
|
*/
|
|
int bcrypt_hashpw(const char *passwd, const char salt[BCRYPT_HASHSIZE],
|
|
char hash[BCRYPT_HASHSIZE]);
|
|
|
|
/*
|
|
* This function expects a password and a hash to verify the password against.
|
|
* The internal implementation is tuned to avoid timing attacks.
|
|
*
|
|
* The return value will be -1 in case of errors, zero if the provided password
|
|
* matches the given hash and greater than zero if no errors are found and the
|
|
* passwords don't match.
|
|
*
|
|
*/
|
|
int bcrypt_checkpw(const char *passwd, const char hash[BCRYPT_HASHSIZE]);
|
|
|
|
/*
|
|
* Brief Example
|
|
* -------------
|
|
*
|
|
* Hashing a password:
|
|
*
|
|
* char salt[BCRYPT_HASHSIZE];
|
|
* char hash[BCRYPT_HASHSIZE];
|
|
* int ret;
|
|
*
|
|
* ret = bcrypt_gensalt(12, salt);
|
|
* assert(ret == 0);
|
|
* ret = bcrypt_hashpw("thepassword", salt, hash);
|
|
* assert(ret == 0);
|
|
*
|
|
*
|
|
* Verifying a password:
|
|
*
|
|
* int ret;
|
|
*
|
|
* ret = bcrypt_checkpw("thepassword", "expectedhash");
|
|
* assert(ret != -1);
|
|
*
|
|
* if (ret == 0) {
|
|
* printf("The password matches\n");
|
|
* } else {
|
|
* printf("The password does NOT match\n");
|
|
* }
|
|
*
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|