1 /* $OpenBSD$ */ 2 3 #include <stdio.h> 4 5 /* This version of crypt has been developed from my MIT compatible 6 * DES library. 7 * Eric Young (eay@cryptsoft.com) 8 */ 9 10 /* Modification by Jens Kupferschmidt (Cu) 11 * I have included directive PARA for shared memory computers. 12 * I have included a directive LONGCRYPT to using this routine to cipher 13 * passwords with more then 8 bytes like HP-UX 10.x it used. The MAXPLEN 14 * definition is the maximum of length of password and can changed. I have 15 * defined 24. 16 */ 17 18 #include "des_locl.h" 19 20 /* Added more values to handle illegal salt values the way normal 21 * crypt() implementations do. The patch was sent by 22 * Bjorn Gronvall <bg@sics.se> 23 */ 24 static unsigned const char con_salt[128]={ 25 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9, 26 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1, 27 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9, 28 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1, 29 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9, 30 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01, 31 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09, 32 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A, 33 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12, 34 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A, 35 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22, 36 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24, 37 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C, 38 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34, 39 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C, 40 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44, 41 }; 42 43 static unsigned const char cov_2char[64]={ 44 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35, 45 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44, 46 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C, 47 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54, 48 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62, 49 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A, 50 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72, 51 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A 52 }; 53 54 char *DES_crypt(const char *buf, const char *salt) 55 { 56 static char buff[14]; 57 58 return(DES_fcrypt(buf,salt,buff)); 59 } 60 61 62 char *DES_fcrypt(const char *buf, const char *salt, char *ret) 63 { 64 unsigned int i,j,x,y; 65 DES_LONG Eswap0,Eswap1; 66 DES_LONG out[2],ll; 67 DES_cblock key; 68 DES_key_schedule ks; 69 unsigned char bb[9]; 70 unsigned char *b=bb; 71 unsigned char c,u; 72 73 /* eay 25/08/92 74 * If you call crypt("pwd","*") as often happens when you 75 * have * as the pwd field in /etc/passwd, the function 76 * returns *\0xxxxxxxxx 77 * The \0 makes the string look like * so the pwd "*" would 78 * crypt to "*". This was found when replacing the crypt in 79 * our shared libraries. People found that the disabled 80 * accounts effectively had no passwd :-(. */ 81 x=ret[0]=((salt[0] == '\0')?'A':salt[0]); 82 Eswap0=con_salt[x]<<2; 83 x=ret[1]=((salt[1] == '\0')?'A':salt[1]); 84 Eswap1=con_salt[x]<<6; 85 /* EAY 86 r=strlen(buf); 87 r=(r+7)/8; 88 */ 89 for (i=0; i<8; i++) 90 { 91 c= *(buf++); 92 if (!c) break; 93 key[i]=(c<<1); 94 } 95 for (; i<8; i++) 96 key[i]=0; 97 98 DES_set_key_unchecked(&key,&ks); 99 fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1); 100 101 ll=out[0]; l2c(ll,b); 102 ll=out[1]; l2c(ll,b); 103 y=0; 104 u=0x80; 105 bb[8]=0; 106 for (i=2; i<13; i++) 107 { 108 c=0; 109 for (j=0; j<6; j++) 110 { 111 c<<=1; 112 if (bb[y] & u) c|=1; 113 u>>=1; 114 if (!u) 115 { 116 y++; 117 u=0x80; 118 } 119 } 120 ret[i]=cov_2char[c]; 121 } 122 ret[13]='\0'; 123 return(ret); 124 } 125 126