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Diff for /src/usr.bin/ssh/Attic/bufaux.c between version 1.29.2.1 and 1.30

version 1.29.2.1, 2004/02/28 03:51:32 version 1.30, 2003/09/18 13:02:21
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  * by (bits+7)/8 bytes of binary data, msb first.   * by (bits+7)/8 bytes of binary data, msb first.
  */   */
 void  void
 buffer_put_bignum(Buffer *buffer, const BIGNUM *value)  buffer_put_bignum(Buffer *buffer, BIGNUM *value)
 {  {
         int bits = BN_num_bits(value);          int bits = BN_num_bits(value);
         int bin_size = (bits + 7) / 8;          int bin_size = (bits + 7) / 8;
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  * Stores an BIGNUM in the buffer in SSH2 format.   * Stores an BIGNUM in the buffer in SSH2 format.
  */   */
 void  void
 buffer_put_bignum2(Buffer *buffer, const BIGNUM *value)  buffer_put_bignum2(Buffer *buffer, BIGNUM *value)
 {  {
         u_int bytes;          u_int bytes = BN_num_bytes(value) + 1;
         u_char *buf;          u_char *buf = xmalloc(bytes);
         int oi;          int oi;
         u_int hasnohigh = 0;          u_int hasnohigh = 0;
   
         if (BN_is_zero(value)) {  
                 buffer_put_int(buffer, 0);  
                 return;  
         }  
         if (value->neg)  
                 fatal("buffer_put_bignum2: negative numbers not supported");  
         bytes = BN_num_bytes(value) + 1; /* extra padding byte */  
         if (bytes < 2)  
                 fatal("buffer_put_bignum2: BN too small");  
         buf = xmalloc(bytes);  
         buf[0] = '\0';          buf[0] = '\0';
         /* Get the value of in binary */          /* Get the value of in binary */
         oi = BN_bn2bin(value, buf+1);          oi = BN_bn2bin(value, buf+1);
         if (oi != bytes-1)          if (oi != bytes-1)
                 fatal("buffer_put_bignum2: BN_bn2bin() failed: "                  fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d",
                     "oi %d != bin_size %d", oi, bytes);                      oi, bytes);
         hasnohigh = (buf[1] & 0x80) ? 0 : 1;          hasnohigh = (buf[1] & 0x80) ? 0 : 1;
           if (value->neg) {
                   /**XXX should be two's-complement */
                   int i, carry;
                   u_char *uc = buf;
                   logit("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);          buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh);
         memset(buf, 0, bytes);          memset(buf, 0, bytes);
         xfree(buf);          xfree(buf);
 }  }
   
   /* XXX does not handle negative BNs */
 void  void
 buffer_get_bignum2(Buffer *buffer, BIGNUM *value)  buffer_get_bignum2(Buffer *buffer, BIGNUM *value)
 {  {
         u_int len;          u_int len;
         u_char *bin = buffer_get_string(buffer, &len);          u_char *bin = buffer_get_string(buffer, &len);
   
         if (len > 0 && (bin[0] & 0x80))  
                 fatal("buffer_get_bignum2: negative numbers not supported");  
         if (len > 8 * 1024)          if (len > 8 * 1024)
                 fatal("buffer_get_bignum2: cannot handle BN of size %d", len);                  fatal("buffer_get_bignum2: cannot handle BN of size %d", len);
         BN_bin2bn(bin, len, value);          BN_bin2bn(bin, len, value);
         xfree(bin);          xfree(bin);
 }  }
   
 /*  /*
  * Returns integers from the buffer (msb first).   * Returns integers from the buffer (msb first).
  */   */
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Removed from v.1.29.2.1  
changed lines
  Added in v.1.30