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New function hash_password() and check_password().

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This commit is contained in:
default 2022-09-19 22:58:27 +02:00
parent c88d4f1e15
commit 8be433c9b6
3 changed files with 39 additions and 0 deletions
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3
main.c
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@ -16,5 +16,8 @@ int main(int argc, char *argv[])
snac_open(&snac, "mike");
snac_log(&snac, xs_str_new("ok"));
char *passwd = xs_dict_get(snac.config, "passwd");
printf("%d\n", check_password("mike", "1234", passwd));
return 0;
}

33
snac.c
View file

@ -90,3 +90,36 @@ void snac_debug(snac *snac, int level, d_char *str)
fprintf(stderr, "%s [%s] %s\n", tm, snac->uid, msg);
}
}
d_char *hash_password(char *uid, char *passwd, char *nonce)
/* hashes a password */
{
xs *d_nonce = NULL;
xs *combi;
xs *hash;
if (nonce == NULL)
nonce = d_nonce = xs_fmt("%08x", random());
combi = xs_fmt("%s:%s:%s", nonce, uid, passwd);
hash = xs_sha1_hex(combi, strlen(combi));
return xs_fmt("%s:%s", nonce, hash);
}
int check_password(char *uid, char *passwd, char *hash)
/* checks a password */
{
int ret = 0;
xs *spl = xs_splitn(hash, ":", 1);
if (xs_list_len(spl) == 2) {
xs *n_hash = hash_password(uid, passwd, xs_list_get(spl, 0));
ret = (strcmp(hash, n_hash) == 0);
}
return ret;
}

3
snac.h
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@ -33,3 +33,6 @@ void snac_debug(snac *snac, int level, d_char *str);
#define snac_log(snac, str) snac_debug(snac, 0, str)
int validate_uid(char *uid);
d_char *hash_password(char *uid, char *passwd, char *nonce);
int check_password(char *uid, char *passwd, char *hash);