GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/crypt/cryptutil.c Lines: 0 35 0.0 %
Date: 2017-11-13 Branches: 0 32 0.0 %

Line Branch Exec Source
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/* $OpenBSD: cryptutil.c,v 1.12 2015/09/13 15:33:48 guenther Exp $ */
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/*
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 * Copyright (c) 2014 Ted Unangst <tedu@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <pwd.h>
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#include <login_cap.h>
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#include <errno.h>
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int
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crypt_checkpass(const char *pass, const char *goodhash)
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{
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	char dummy[_PASSWORD_LEN];
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	if (goodhash == NULL) {
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		/* fake it */
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		goto fake;
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	}
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	/* empty password */
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	if (strlen(goodhash) == 0 && strlen(pass) == 0)
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		return 0;
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	if (goodhash[0] == '$' && goodhash[1] == '2') {
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		if (bcrypt_checkpass(pass, goodhash))
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			goto fail;
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		return 0;
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	}
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	/* unsupported. fake it. */
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fake:
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	bcrypt_newhash(pass, 8, dummy, sizeof(dummy));
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fail:
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	errno = EACCES;
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	return -1;
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}
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DEF_WEAK(crypt_checkpass);
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int
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crypt_newhash(const char *pass, const char *pref, char *hash, size_t hashlen)
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{
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	int rv = -1;
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	const char *defaultpref = "blowfish,8";
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	const char *errstr;
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	const char *choices[] = { "blowfish", "bcrypt" };
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	size_t maxchoice = sizeof(choices) / sizeof(choices[0]);
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	int i;
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	int rounds;
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	if (pref == NULL)
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		pref = defaultpref;
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	for (i = 0; i < maxchoice; i++) {
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		const char *choice = choices[i];
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		size_t len = strlen(choice);
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		if (strcmp(pref, choice) == 0) {
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			rounds = _bcrypt_autorounds();
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			break;
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		} else if (strncmp(pref, choice, len) == 0 &&
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		    pref[len] == ',') {
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			if (strcmp(pref + len + 1, "a") == 0) {
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				rounds = _bcrypt_autorounds();
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			} else {
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				rounds = strtonum(pref + len + 1, 4, 31, &errstr);
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				if (errstr) {
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					errno = EINVAL;
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					goto err;
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				}
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			}
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			break;
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		}
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	}
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	if (i == maxchoice) {
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		errno = EINVAL;
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		goto err;
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	}
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	rv = bcrypt_newhash(pass, rounds, hash, hashlen);
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err:
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	return rv;
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}
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DEF_WEAK(crypt_newhash);