fcrypt.c 4.1 KB

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