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Diffstat (limited to 'modules/pam_unix/md5_crypt.c')
| -rw-r--r-- | modules/pam_unix/md5_crypt.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/modules/pam_unix/md5_crypt.c b/modules/pam_unix/md5_crypt.c deleted file mode 100644 index 53972fcc..00000000 --- a/modules/pam_unix/md5_crypt.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * $Id$ - * - * ---------------------------------------------------------------------------- - * "THE BEER-WARE LICENSE" (Revision 42): - * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you - * can do whatever you want with this stuff. If we meet some day, and you think - * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp - * ---------------------------------------------------------------------------- - * - * Origin: Id: crypt.c,v 1.3 1995/05/30 05:42:22 rgrimes Exp - * - */ - -#include <string.h> -#include <stdlib.h> -#include "md5.h" - -static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */ -"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; - -static void to64(char *s, unsigned long v, int n) -{ - while (--n >= 0) { - *s++ = itoa64[v & 0x3f]; - v >>= 6; - } -} - -/* - * UNIX password - * - * Use MD5 for what it is best at... - */ - -char *MD5Name(crypt_md5)(const char *pw, const char *salt) -{ - const char *magic = "$1$"; - /* This string is magic for this algorithm. Having - * it this way, we can get get better later on */ - char *passwd, *p; - const char *sp, *ep; - unsigned char final[16]; - int sl, pl, i, j; - MD5_CTX ctx, ctx1; - unsigned long l; - - /* Refine the Salt first */ - sp = salt; - - /* TODO: now that we're using malloc'ed memory, get rid of the - strange constant buffer size. */ - passwd = malloc(120); - - /* If it starts with the magic string, then skip that */ - if (!strncmp(sp, magic, strlen(magic))) - sp += strlen(magic); - - /* It stops at the first '$', max 8 chars */ - for (ep = sp; *ep && *ep != '$' && ep < (sp + 8); ep++) - continue; - - /* get the length of the true salt */ - sl = ep - sp; - - MD5Name(MD5Init)(&ctx); - - /* The password first, since that is what is most unknown */ - MD5Name(MD5Update)(&ctx,(unsigned const char *)pw,strlen(pw)); - - /* Then our magic string */ - MD5Name(MD5Update)(&ctx,(unsigned const char *)magic,strlen(magic)); - - /* Then the raw salt */ - MD5Name(MD5Update)(&ctx,(unsigned const char *)sp,sl); - - /* Then just as many characters of the MD5(pw,salt,pw) */ - MD5Name(MD5Init)(&ctx1); - MD5Name(MD5Update)(&ctx1,(unsigned const char *)pw,strlen(pw)); - MD5Name(MD5Update)(&ctx1,(unsigned const char *)sp,sl); - MD5Name(MD5Update)(&ctx1,(unsigned const char *)pw,strlen(pw)); - MD5Name(MD5Final)(final,&ctx1); - for (pl = strlen(pw); pl > 0; pl -= 16) - MD5Name(MD5Update)(&ctx,(unsigned const char *)final,pl>16 ? 16 : pl); - - /* Don't leave anything around in vm they could use. */ - memset(final, 0, sizeof final); - - /* Then something really weird... */ - for (j = 0, i = strlen(pw); i; i >>= 1) - if (i & 1) - MD5Name(MD5Update)(&ctx, (unsigned const char *)final+j, 1); - else - MD5Name(MD5Update)(&ctx, (unsigned const char *)pw+j, 1); - - /* Now make the output string */ - strcpy(passwd, magic); - strncat(passwd, sp, sl); - strcat(passwd, "$"); - - MD5Name(MD5Final)(final,&ctx); - - /* - * and now, just to make sure things don't run too fast - * On a 60 Mhz Pentium this takes 34 msec, so you would - * need 30 seconds to build a 1000 entry dictionary... - */ - for (i = 0; i < 1000; i++) { - MD5Name(MD5Init)(&ctx1); - if (i & 1) - MD5Name(MD5Update)(&ctx1,(unsigned const char *)pw,strlen(pw)); - else - MD5Name(MD5Update)(&ctx1,(unsigned const char *)final,16); - - if (i % 3) - MD5Name(MD5Update)(&ctx1,(unsigned const char *)sp,sl); - - if (i % 7) - MD5Name(MD5Update)(&ctx1,(unsigned const char *)pw,strlen(pw)); - - if (i & 1) - MD5Name(MD5Update)(&ctx1,(unsigned const char *)final,16); - else - MD5Name(MD5Update)(&ctx1,(unsigned const char *)pw,strlen(pw)); - MD5Name(MD5Final)(final,&ctx1); - } - - p = passwd + strlen(passwd); - - l = (final[0] << 16) | (final[6] << 8) | final[12]; - to64(p, l, 4); - p += 4; - l = (final[1] << 16) | (final[7] << 8) | final[13]; - to64(p, l, 4); - p += 4; - l = (final[2] << 16) | (final[8] << 8) | final[14]; - to64(p, l, 4); - p += 4; - l = (final[3] << 16) | (final[9] << 8) | final[15]; - to64(p, l, 4); - p += 4; - l = (final[4] << 16) | (final[10] << 8) | final[5]; - to64(p, l, 4); - p += 4; - l = final[11]; - to64(p, l, 2); - p += 2; - *p = '\0'; - - /* Don't leave anything around in vm they could use. */ - memset(final, 0, sizeof final); - - return passwd; -} |