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Diff for /src/usr.bin/ssh/Attic/bufaux.c between version 1.8 and 1.9

version 1.8, 2000/03/16 20:56:14 version 1.9, 2000/03/28 20:24:18
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  * Auxiliary functions for storing and retrieving various data types to/from   * Auxiliary functions for storing and retrieving various data types to/from
  * Buffers.   * Buffers.
  *   *
    * SSH2 packet format added by Markus Friedl
    *
  */   */
   
 #include "includes.h"  #include "includes.h"
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 }  }
   
 /*  /*
    * Stores an BIGNUM in the buffer in SSH2 format.
    */
   void
   buffer_put_bignum2(Buffer *buffer, BIGNUM *value)
   {
           int bytes = BN_num_bytes(value) + 1;
           unsigned char *buf = xmalloc(bytes);
           int oi;
           int hasnohigh = 0;
           buf[0] = '\0';
           /* Get the value of in binary */
           oi = BN_bn2bin(value, buf+1);
           if (oi != bytes-1)
                   fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d",
                         oi, bytes);
           hasnohigh = (buf[1] & 0x80) ? 0 : 1;
           if (value->neg) {
                   /**XXX should be two's-complement */
                   int i, carry;
                   unsigned char *uc = buf;
                   log("negativ!");
                   for(i = bytes-1, carry = 1; i>=0; i--) {
                           uc[i] ^= 0xff;
                           if(carry)
                                   carry = !++uc[i];
                   }
           }
           buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh);
           memset(buf, 0, bytes);
           xfree(buf);
   }
   
   int
   buffer_get_bignum2(Buffer *buffer, BIGNUM *value)
   {
           /**XXX should be two's-complement */
           int len;
           unsigned char *bin = (unsigned char *)buffer_get_string(buffer, (unsigned int *)&len);
           BN_bin2bn(bin, len, value);
           xfree(bin);
           return len;
   }
   
   /*
  * Returns an integer from the buffer (4 bytes, msb first).   * Returns an integer from the buffer (4 bytes, msb first).
  */   */
 unsigned int  unsigned int
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 {  {
         buffer_put_int(buffer, len);          buffer_put_int(buffer, len);
         buffer_append(buffer, buf, len);          buffer_append(buffer, buf, len);
   }
   void
   buffer_put_cstring(Buffer *buffer, const char *s)
   {
           buffer_put_string(buffer, s, strlen(s));
 }  }
   
 /*  /*
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Removed from v.1.8  
changed lines
  Added in v.1.9