+++ /dev/null
-/*
- * ----------------------------------------------------------------------------
- * "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
- * ----------------------------------------------------------------------------
- */
-
-#include "includes.h"
-
-#if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT)
-#include <sys/types.h>
-
-#include <string.h>
-
-#include <openssl/md5.h>
-
-/* 0 ... 63 => ascii - 64 */
-static unsigned char itoa64[] =
- "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
-static char *magic = "$1$";
-
-static char *
-to64(unsigned long v, int n)
-{
- static char buf[5];
- char *s = buf;
-
- if (n > 4)
- return (NULL);
-
- memset(buf, '\0', sizeof(buf));
- while (--n >= 0) {
- *s++ = itoa64[v&0x3f];
- v >>= 6;
- }
-
- return (buf);
-}
-
-int
-is_md5_salt(const char *salt)
-{
- return (strncmp(salt, magic, strlen(magic)) == 0);
-}
-
-char *
-md5_crypt(const char *pw, const char *salt)
-{
- static char passwd[120], salt_copy[9];
- static 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;
-
- /* If it starts with the magic string, then skip that */
- if(strncmp(sp, magic, strlen(magic)) == 0)
- sp += strlen(magic);
-
- /* It stops at the first '$', max 8 chars */
- for (ep = sp; *ep != '$'; ep++) {
- if (*ep == '\0' || ep >= (sp + 8))
- return (NULL);
- }
-
- /* get the length of the true salt */
- sl = ep - sp;
-
- /* Stash the salt */
- memcpy(salt_copy, sp, sl);
- salt_copy[sl] = '\0';
-
- MD5_Init(&ctx);
-
- /* The password first, since that is what is most unknown */
- MD5_Update(&ctx, pw, strlen(pw));
-
- /* Then our magic string */
- MD5_Update(&ctx, magic, strlen(magic));
-
- /* Then the raw salt */
- MD5_Update(&ctx, sp, sl);
-
- /* Then just as many characters of the MD5(pw, salt, pw) */
- MD5_Init(&ctx1);
- MD5_Update(&ctx1, pw, strlen(pw));
- MD5_Update(&ctx1, sp, sl);
- MD5_Update(&ctx1, pw, strlen(pw));
- MD5_Final(final, &ctx1);
-
- for(pl = strlen(pw); pl > 0; pl -= 16)
- MD5_Update(&ctx, 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 != 0; i >>= 1)
- if (i & 1)
- MD5_Update(&ctx, final + j, 1);
- else
- MD5_Update(&ctx, pw + j, 1);
-
- /* Now make the output string */
- snprintf(passwd, sizeof(passwd), "%s%s$", magic, salt_copy);
-
- MD5_Final(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++) {
- MD5_Init(&ctx1);
- if (i & 1)
- MD5_Update(&ctx1, pw, strlen(pw));
- else
- MD5_Update(&ctx1, final, 16);
-
- if (i % 3)
- MD5_Update(&ctx1, sp, sl);
-
- if (i % 7)
- MD5_Update(&ctx1, pw, strlen(pw));
-
- if (i & 1)
- MD5_Update(&ctx1, final, 16);
- else
- MD5_Update(&ctx1, pw, strlen(pw));
-
- MD5_Final(final, &ctx1);
- }
-
- l = (final[ 0]<<16) | (final[ 6]<<8) | final[12];
- strlcat(passwd, to64(l, 4), sizeof(passwd));
- l = (final[ 1]<<16) | (final[ 7]<<8) | final[13];
- strlcat(passwd, to64(l, 4), sizeof(passwd));
- l = (final[ 2]<<16) | (final[ 8]<<8) | final[14];
- strlcat(passwd, to64(l, 4), sizeof(passwd));
- l = (final[ 3]<<16) | (final[ 9]<<8) | final[15];
- strlcat(passwd, to64(l, 4), sizeof(passwd));
- l = (final[ 4]<<16) | (final[10]<<8) | final[ 5];
- strlcat(passwd, to64(l, 4), sizeof(passwd));
- l = final[11] ;
- strlcat(passwd, to64(l, 2), sizeof(passwd));
-
- /* Don't leave anything around in vm they could use. */
- memset(final, 0, sizeof(final));
- memset(salt_copy, 0, sizeof(salt_copy));
- memset(&ctx, 0, sizeof(ctx));
- memset(&ctx1, 0, sizeof(ctx1));
- (void)to64(0, 4);
-
- return (passwd);
-}
-
-#endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */
projects / thirdparty / openssh-portable.git / commitdiff
