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Diffstat (limited to 'lib/encrypt.c')
| -rw-r--r-- | lib/encrypt.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/lib/encrypt.c b/lib/encrypt.c new file mode 100644 index 0000000..53c99c9 --- /dev/null +++ b/lib/encrypt.c @@ -0,0 +1,95 @@ +/* + * Copyright (c) 1990 - 1993, Julianne Frances Haugh + * Copyright (c) 1996 - 2000, Marek Michałkiewicz + * Copyright (c) 2005 , Tomasz Kłoczko + * Copyright (c) 2007 - 2010, Nicolas François + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <config.h> + +#ident "$Id$" + +#include <unistd.h> +#include <stdio.h> + +#include "prototypes.h" +#include "defines.h" + +/*@exposed@*//*@null@*/char *pw_encrypt (const char *clear, const char *salt) +{ + static char cipher[128]; + char *cp; + + cp = crypt (clear, salt); + if (NULL == cp) { + /* + * Single Unix Spec: crypt() may return a null pointer, + * and set errno to indicate an error. In this case return + * the NULL so the caller can handle appropriately. + */ + return NULL; + } + + /* Some crypt() do not return NULL if the algorithm is not + * supported, and return a DES encrypted password. */ + if ((NULL != salt) && (salt[0] == '$') && (strlen (cp) <= 13)) + { + /*@observer@*/const char *method; + switch (salt[1]) + { + case '1': + method = "MD5"; + break; + case '5': + method = "SHA256"; + break; + case '6': + method = "SHA512"; + break; + default: + { + static char nummethod[4] = "$x$"; + nummethod[1] = salt[1]; + method = &nummethod[0]; + } + } + (void) fprintf (stderr, + _("crypt method not supported by libcrypt? (%s)\n"), + method); + exit (EXIT_FAILURE); + } + + if (strlen (cp) != 13) { + return cp; /* nonstandard crypt() in libc, better bail out */ + } + + strcpy (cipher, cp); + + return cipher; +} + |