mux/src/crypt/crypt-entry.cpp File Reference

#include <string.h>
#include "ufc-crypt.h"
#include "crypt.h"
#include "crypt-private.h"

Include dependency graph for crypt-entry.cpp:

Go to the source code of this file.

Defines
#define	STATIC   static
Functions
void	_ufc_setup_salt_r (const char *s, struct crypt_data *__data)
void	_ufc_mk_keytab_r (char *key, struct crypt_data *__data)
void	_ufc_dofinalperm_r (ufc_long *res, struct crypt_data *__data)
void	_ufc_output_conversion_r (ufc_long v1, ufc_long v2, const char *salt, struct crypt_data *__data)
char *	__md5_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
char *	__md5_crypt (const char *key, const char *salt)
char *	crypt_r (const char *key, const char *salt, struct crypt_data *data)
char *	crypt (const char *key, const char *salt)
char *	__fcrypt (const char *key, const char *salt)
Variables
static const char	md5_salt_prefix [] = "$1$"
crypt_data	_ufc_foobar

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Define Documentation

#define STATIC   static

Definition at line 33 of file crypt-entry.cpp.

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Function Documentation

char* __fcrypt	(	const char *	key,
		const char *	salt
	)

Definition at line 138 of file crypt-entry.cpp.

References crypt().

{
  return crypt (key, salt);
}

char* __md5_crypt	(	const char *	key,
		const char *	salt
	)

Referenced by crypt().

char* __md5_crypt_r	(	const char *	key,
		const char *	salt,
		char *	buffer,
		int	buflen
	)

Referenced by crypt_r().

void _ufc_dofinalperm_r	(	ufc_long *	res,
		struct crypt_data *	__data
	)

Definition at line 659 of file crypt_util.cpp.

Referenced by __encrypt_r(), and crypt_r().

{
  ufc_long v1, v2, x;
  ufc_long l1,l2,r1,r2;

  l1 = res[0]; l2 = res[1];
  r1 = res[2]; r2 = res[3];

  x = (l1 ^ l2) & __data->current_saltbits; l1 ^= x; l2 ^= x;
  x = (r1 ^ r2) & __data->current_saltbits; r1 ^= x; r2 ^= x;

  v1=v2=0; l1 >>= 3; l2 >>= 3; r1 >>= 3; r2 >>= 3;

  v1 |= efp[15][ r2         & 0x3f][0]; v2 |= efp[15][ r2 & 0x3f][1];
  v1 |= efp[14][(r2 >>= 6)  & 0x3f][0]; v2 |= efp[14][ r2 & 0x3f][1];
  v1 |= efp[13][(r2 >>= 10) & 0x3f][0]; v2 |= efp[13][ r2 & 0x3f][1];
  v1 |= efp[12][(r2 >>= 6)  & 0x3f][0]; v2 |= efp[12][ r2 & 0x3f][1];

  v1 |= efp[11][ r1         & 0x3f][0]; v2 |= efp[11][ r1 & 0x3f][1];
  v1 |= efp[10][(r1 >>= 6)  & 0x3f][0]; v2 |= efp[10][ r1 & 0x3f][1];
  v1 |= efp[ 9][(r1 >>= 10) & 0x3f][0]; v2 |= efp[ 9][ r1 & 0x3f][1];
  v1 |= efp[ 8][(r1 >>= 6)  & 0x3f][0]; v2 |= efp[ 8][ r1 & 0x3f][1];

  v1 |= efp[ 7][ l2         & 0x3f][0]; v2 |= efp[ 7][ l2 & 0x3f][1];
  v1 |= efp[ 6][(l2 >>= 6)  & 0x3f][0]; v2 |= efp[ 6][ l2 & 0x3f][1];
  v1 |= efp[ 5][(l2 >>= 10) & 0x3f][0]; v2 |= efp[ 5][ l2 & 0x3f][1];
  v1 |= efp[ 4][(l2 >>= 6)  & 0x3f][0]; v2 |= efp[ 4][ l2 & 0x3f][1];

  v1 |= efp[ 3][ l1         & 0x3f][0]; v2 |= efp[ 3][ l1 & 0x3f][1];
  v1 |= efp[ 2][(l1 >>= 6)  & 0x3f][0]; v2 |= efp[ 2][ l1 & 0x3f][1];
  v1 |= efp[ 1][(l1 >>= 10) & 0x3f][0]; v2 |= efp[ 1][ l1 & 0x3f][1];
  v1 |= efp[ 0][(l1 >>= 6)  & 0x3f][0]; v2 |= efp[ 0][ l1 & 0x3f][1];

  res[0] = v1; res[1] = v2;
}

void _ufc_mk_keytab_r	(	char *	key,
		struct crypt_data *	__data
	)

Definition at line 601 of file crypt_util.cpp.

Referenced by __setkey_r(), and crypt_r().

{
  ufc_long v1, v2, *k1;
  int i;
#ifdef _UFC_32_
  long32 v, *k2;
  k2 = (long32*)__data->keysched;
#endif
#ifdef _UFC_64_
  long64 v, *k2;
  k2 = (long64*)__data->keysched;
#endif

  v1 = v2 = 0; k1 = &do_pc1[0][0][0];
  for(i = 8; i--;) {
    v1 |= k1[*key   & 0x7f]; k1 += 128;
    v2 |= k1[*key++ & 0x7f]; k1 += 128;
  }

  for(i = 0; i < 16; i++) {
    k1 = &do_pc2[0][0];

    v1 = (v1 << rots[i]) | (v1 >> (28 - rots[i]));
    v  = k1[(v1 >> 21) & 0x7f]; k1 += 128;
    v |= k1[(v1 >> 14) & 0x7f]; k1 += 128;
    v |= k1[(v1 >>  7) & 0x7f]; k1 += 128;
    v |= k1[(v1      ) & 0x7f]; k1 += 128;

#ifdef _UFC_32_
    *k2++ = (v | 0x00008000);
    v = 0;
#endif
#ifdef _UFC_64_
    v = (v << 32);
#endif

    v2 = (v2 << rots[i]) | (v2 >> (28 - rots[i]));
    v |= k1[(v2 >> 21) & 0x7f]; k1 += 128;
    v |= k1[(v2 >> 14) & 0x7f]; k1 += 128;
    v |= k1[(v2 >>  7) & 0x7f]; k1 += 128;
    v |= k1[(v2      ) & 0x7f];

#ifdef _UFC_32_
    *k2++ = (v | 0x00008000);
#endif
#ifdef _UFC_64_
    *k2++ = v | 0x0000800000008000l;
#endif
  }

  __data->direction = 0;
}

void _ufc_output_conversion_r	(	ufc_long	v1,
		ufc_long	v2,
		const char *	salt,
		struct crypt_data *	__data
	)

Definition at line 701 of file crypt_util.cpp.

Referenced by crypt_r().

{
  int i, s, shf;

  __data->crypt_3_buf[0] = salt[0];
  __data->crypt_3_buf[1] = salt[1] ? salt[1] : salt[0];

  for(i = 0; i < 5; i++) {
    shf = (26 - 6 * i); /* to cope with MSC compiler bug */
    __data->crypt_3_buf[i + 2] = bin_to_ascii((v1 >> shf) & 0x3f);
  }

  s  = (v2 & 0xf) << 2;
  v2 = (v2 >> 2) | ((v1 & 0x3) << 30);

  for(i = 5; i < 10; i++) {
    shf = (56 - 6 * i);
    __data->crypt_3_buf[i + 2] = bin_to_ascii((v2 >> shf) & 0x3f);
  }

  __data->crypt_3_buf[12] = bin_to_ascii(s);
  __data->crypt_3_buf[13] = 0;
}

void _ufc_setup_salt_r	(	const char *	s,
		struct crypt_data *	__data
	)

Definition at line 555 of file crypt_util.cpp.

Referenced by __encrypt_r(), __setkey_r(), and crypt_r().

{
  ufc_long i, j, saltbits;

  if(__data->initialized == 0)
    __init_des_r(__data);

  if(s[0] == __data->current_salt[0] && s[1] == __data->current_salt[1])
    return;
  __data->current_salt[0] = s[0]; __data->current_salt[1] = s[1];

  /*
   * This is the only crypt change to DES:
   * entries are swapped in the expansion table
   * according to the bits set in the salt.
   */
  saltbits = 0;
  for(i = 0; i < 2; i++) {
    long c=ascii_to_bin(s[i]);
    for(j = 0; j < 6; j++) {
      if((c >> j) & 0x1)
    saltbits |= BITMASK[6 * i + j];
    }
  }

  /*
   * Permute the sb table values
   * to reflect the changed e
   * selection table
   */
#ifdef _UFC_32_
#define LONGG long32*
#endif
#ifdef _UFC_64_
#define LONGG long64*
#endif

  shuffle_sb((LONGG)__data->sb0, __data->current_saltbits ^ saltbits);
  shuffle_sb((LONGG)__data->sb1, __data->current_saltbits ^ saltbits);
  shuffle_sb((LONGG)__data->sb2, __data->current_saltbits ^ saltbits);
  shuffle_sb((LONGG)__data->sb3, __data->current_saltbits ^ saltbits);

  __data->current_saltbits = saltbits;
}

char* crypt	(	const char *	key,
		const char *	salt
	)

Definition at line 118 of file crypt-entry.cpp.

Referenced by __fcrypt(), and mux_crypt().

{
#ifdef _LIBC
  /* Try to find out whether we have to use MD5 encryption replacement.  */
  if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
    return __md5_crypt (key, salt);
#endif

  return crypt_r (key, salt, &_ufc_foobar);
}

char* crypt_r	(	const char *	key,
		const char *	salt,
		struct crypt_data *	data
	)

Definition at line 74 of file crypt-entry.cpp.

References __md5_crypt_r(), _ufc_dofinalperm_r(), _ufc_doit_r(), _ufc_mk_keytab_r(), _ufc_output_conversion_r(), _ufc_setup_salt_r(), and md5_salt_prefix.

Referenced by crypt().

{
  ufc_long res[4];
  char ktab[9];
  ufc_long xx = 25; /* to cope with GCC long long compiler bugs */

#ifdef _LIBC
  /* Try to find out whether we have to use MD5 encryption replacement.  */
  if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
    return __md5_crypt_r (key, salt, (char *) data,
              sizeof (struct crypt_data));
#endif

  /*
   * Hack DES tables according to salt
   */
  _ufc_setup_salt_r (salt, data);

  /*
   * Setup key schedule
   */
  memset(ktab, 0, sizeof(ktab));
  strncpy (ktab, key, 8);
  _ufc_mk_keytab_r (ktab, data);

  /*
   * Go for the 25 DES encryptions
   */
  memset(res, 0, sizeof (res));
  _ufc_doit_r (xx,  data, &res[0]);

  /*
   * Do final permutations
   */
  _ufc_dofinalperm_r (res, data);

  /*
   * And convert back to 6 bit ASCII
   */
  _ufc_output_conversion_r (res[0], res[1], salt, data);
  return data->crypt_3_buf;
}

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Variable Documentation

struct crypt_data _ufc_foobar

Definition at line 259 of file crypt_util.cpp.

Referenced by __init_des(), crypt(), encrypt(), and setkey().

const char md5_salt_prefix[] = "$1$" [static]

Definition at line 64 of file crypt-entry.cpp.

Referenced by crypt(), and crypt_r().

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