126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
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/* $OpenBSD: fcrypt.c,v 1.12 2016/12/26 21:30:10 jca Exp $ */
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#include <stdio.h>
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/* This version of crypt has been developed from my MIT compatible
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* DES library.
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* Eric Young (eay@cryptsoft.com)
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*/
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/* Modification by Jens Kupferschmidt (Cu)
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* I have included directive PARA for shared memory computers.
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* I have included a directive LONGCRYPT to using this routine to cipher
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* passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN
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* definition is the maximum of length of password and can changed. I have
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* defined 24.
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*/
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#include "des_locl.h"
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/* Added more values to handle illegal salt values the way normal
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* crypt() implementations do. The patch was sent by
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* Bjorn Gronvall <bg@sics.se>
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*/
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static unsigned const char con_salt[128]={
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0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
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0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
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0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
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0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
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0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
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0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
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0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
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0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
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0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
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0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
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0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
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0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
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0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
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0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
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0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
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0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
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};
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static unsigned const char cov_2char[64]={
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0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
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0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
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0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
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0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
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0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
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0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
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0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
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0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
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};
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char *DES_crypt(const char *buf, const char *salt)
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{
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static char buff[14];
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return(DES_fcrypt(buf,salt,buff));
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}
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char *DES_fcrypt(const char *buf, const char *salt, char *ret)
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{
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unsigned int i,j,x,y;
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DES_LONG Eswap0,Eswap1;
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DES_LONG out[2],ll;
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DES_cblock key;
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DES_key_schedule ks;
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unsigned char bb[9];
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unsigned char *b=bb;
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unsigned char c,u;
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/* eay 25/08/92
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* If you call crypt("pwd","*") as often happens when you
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* have * as the pwd field in /etc/passwd, the function
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* returns *\0xxxxxxxxx
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* The \0 makes the string look like * so the pwd "*" would
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* crypt to "*". This was found when replacing the crypt in
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* our shared libraries. People found that the disabled
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* accounts effectively had no passwd :-(. */
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x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
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Eswap0=con_salt[x]<<2;
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x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
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Eswap1=con_salt[x]<<6;
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/* EAY
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r=strlen(buf);
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r=(r+7)/8;
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*/
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for (i=0; i<8; i++)
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{
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c= *(buf++);
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if (!c) break;
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key[i]=(c<<1);
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}
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for (; i<8; i++)
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key[i]=0;
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DES_set_key_unchecked(&key,&ks);
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fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1);
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ll=out[0]; l2c(ll,b);
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ll=out[1]; l2c(ll,b);
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y=0;
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u=0x80;
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bb[8]=0;
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for (i=2; i<13; i++)
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{
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c=0;
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for (j=0; j<6; j++)
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{
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c<<=1;
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if (bb[y] & u) c|=1;
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u>>=1;
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if (!u)
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{
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y++;
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u=0x80;
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}
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}
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ret[i]=cov_2char[c];
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}
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ret[13]='\0';
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return(ret);
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}
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