1 /* NOCW */ 2 #include <stdio.h> 3 4 /* This version of crypt has been developed from my MIT compatible 5 * DES library. 6 * Eric Young (eay@cryptsoft.com) 7 */ 8 9 /* Modification by Jens Kupferschmidt (Cu) 10 * I have included directive PARA for shared memory computers. 11 * I have included a directive LONGCRYPT to using this routine to cipher 12 * passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN 13 * definition is the maximum of length of password and can changed. I have 14 * defined 24. 15 */ 16 17 #include "des_locl.h" 18 19 /* Added more values to handle illegal salt values the way normal 20 * crypt() implementations do. The patch was sent by 21 * Bjorn Gronvall <bg@sics.se> 22 */ 23 static unsigned const char con_salt[128]={ 24 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9, 25 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1, 26 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9, 27 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1, 28 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9, 29 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01, 30 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09, 31 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A, 32 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12, 33 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A, 34 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22, 35 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24, 36 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C, 37 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34, 38 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C, 39 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44, 40 }; 41 42 static unsigned const char cov_2char[64]={ 43 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35, 44 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44, 45 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C, 46 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54, 47 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62, 48 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A, 49 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72, 50 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A 51 }; 52 53 void fcrypt_body(DES_LONG *out,des_key_schedule ks, 54 DES_LONG Eswap0, DES_LONG Eswap1); 55 56 char *des_crypt(const char *buf, const char *salt) 57 { 58 static char buff[14]; 59 60 #ifndef CHARSET_EBCDIC 61 return(des_fcrypt(buf,salt,buff)); 62 #else 63 char e_salt[2+1]; 64 char e_buf[32+1]; /* replace 32 by 8 ? */ 65 char *ret; 66 67 /* Copy at most 2 chars of salt */ 68 if ((e_salt[0] = salt[0]) != '\0') 69 e_salt[1] = salt[1]; 70 71 /* Copy at most 32 chars of password */ 72 strncpy (e_buf, buf, sizeof(e_buf)); 73 74 /* Make sure we have a delimiter */ 75 e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0'; 76 77 /* Convert the e_salt to ASCII, as that's what des_fcrypt works on */ 78 ebcdic2ascii(e_salt, e_salt, sizeof e_salt); 79 80 /* Convert the cleartext password to ASCII */ 81 ebcdic2ascii(e_buf, e_buf, sizeof e_buf); 82 83 /* Encrypt it (from/to ASCII) */ 84 ret = des_fcrypt(e_buf,e_salt,buff); 85 86 /* Convert the result back to EBCDIC */ 87 ascii2ebcdic(ret, ret, strlen(ret)); 88 89 return ret; 90 #endif 91 } 92 93 94 char *des_fcrypt(const char *buf, const char *salt, char *ret) 95 { 96 unsigned int i,j,x,y; 97 DES_LONG Eswap0,Eswap1; 98 DES_LONG out[2],ll; 99 des_cblock key; 100 des_key_schedule ks; 101 unsigned char bb[9]; 102 unsigned char *b=bb; 103 unsigned char c,u; 104 105 /* eay 25/08/92 106 * If you call crypt("pwd","*") as often happens when you 107 * have * as the pwd field in /etc/passwd, the function 108 * returns *\0XXXXXXXXX 109 * The \0 makes the string look like * so the pwd "*" would 110 * crypt to "*". This was found when replacing the crypt in 111 * our shared libraries. People found that the disabled 112 * accounts effectively had no passwd :-(. */ 113 #ifndef CHARSET_EBCDIC 114 x=ret[0]=((salt[0] == '\0')?'A':salt[0]); 115 Eswap0=con_salt[x]<<2; 116 x=ret[1]=((salt[1] == '\0')?'A':salt[1]); 117 Eswap1=con_salt[x]<<6; 118 #else 119 x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]); 120 Eswap0=con_salt[x]<<2; 121 x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]); 122 Eswap1=con_salt[x]<<6; 123 #endif 124 125 /* EAY 126 r=strlen(buf); 127 r=(r+7)/8; 128 */ 129 for (i=0; i<8; i++) 130 { 131 c= *(buf++); 132 if (!c) break; 133 key[i]=(c<<1); 134 } 135 for (; i<8; i++) 136 key[i]=0; 137 138 des_set_key_unchecked(&key,ks); 139 fcrypt_body(&(out[0]),ks,Eswap0,Eswap1); 140 141 ll=out[0]; l2c(ll,b); 142 ll=out[1]; l2c(ll,b); 143 y=0; 144 u=0x80; 145 bb[8]=0; 146 for (i=2; i<13; i++) 147 { 148 c=0; 149 for (j=0; j<6; j++) 150 { 151 c<<=1; 152 if (bb[y] & u) c|=1; 153 u>>=1; 154 if (!u) 155 { 156 y++; 157 u=0x80; 158 } 159 } 160 ret[i]=cov_2char[c]; 161 } 162 ret[13]='\0'; 163 return(ret); 164 } 165 166