-#include <openssl/bn.h>
-#include "bufaux.h"
-#include "xmalloc.h"
-#include "getput.h"
-#include "log.h"
-
-/*
- * Stores an BIGNUM in the buffer with a 2-byte msb first bit count, followed
- * by (bits+7)/8 bytes of binary data, msb first.
- */
-int
-buffer_put_bignum_ret(Buffer *buffer, const BIGNUM *value)
-{
- int bits = BN_num_bits(value);
- int bin_size = (bits + 7) / 8;
- u_char *buf = xmalloc(bin_size);
- int oi;
- char msg[2];
-
- /* Get the value of in binary */
- oi = BN_bn2bin(value, buf);
- if (oi != bin_size) {
- error("buffer_put_bignum_ret: BN_bn2bin() failed: oi %d != bin_size %d",
- oi, bin_size);
- return (-1);
- }
-
- /* Store the number of bits in the buffer in two bytes, msb first. */
- PUT_16BIT(msg, bits);
- buffer_append(buffer, msg, 2);
- /* Store the binary data. */
- buffer_append(buffer, (char *)buf, oi);
-
- memset(buf, 0, bin_size);
- xfree(buf);
-
- return (0);
-}
-
-void
-buffer_put_bignum(Buffer *buffer, const BIGNUM *value)
-{
- if (buffer_put_bignum_ret(buffer, value) == -1)
- fatal("buffer_put_bignum: buffer error");
-}
-
-/*
- * Retrieves an BIGNUM from the buffer.
- */
-int
-buffer_get_bignum_ret(Buffer *buffer, BIGNUM *value)
-{
- u_int bits, bytes;
- u_char buf[2], *bin;
-
- /* Get the number for bits. */
- if (buffer_get_ret(buffer, (char *) buf, 2) == -1) {
- error("buffer_get_bignum_ret: invalid length");
- return (-1);
- }
- bits = GET_16BIT(buf);
- /* Compute the number of binary bytes that follow. */
- bytes = (bits + 7) / 8;
- if (bytes > 8 * 1024) {
- error("buffer_get_bignum_ret: cannot handle BN of size %d", bytes);
- return (-1);
- }
- if (buffer_len(buffer) < bytes) {
- error("buffer_get_bignum_ret: input buffer too small");
- return (-1);
- }
- bin = buffer_ptr(buffer);
- BN_bin2bn(bin, bytes, value);
- if (buffer_consume_ret(buffer, bytes) == -1) {
- error("buffer_get_bignum_ret: buffer_consume failed");
- return (-1);
- }
- return (0);
-}
-
-void
-buffer_get_bignum(Buffer *buffer, BIGNUM *value)
-{
- if (buffer_get_bignum_ret(buffer, value) == -1)
- fatal("buffer_get_bignum: buffer error");
-}