/*
* Retrieves a 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 of bits. */
if (buffer_get_ret(buffer, (char *) buf, 2) == -1) {
error("buffer_get_bignum_ret: invalid length");
return (-1);
}
bits = get_u16(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);
if (BN_bin2bn(bin, bytes, value) == NULL) {
error("buffer_get_bignum_ret: BN_bin2bn failed");
return (-1);
}
if (buffer_consume_ret(buffer, bytes) == -1) {
error("buffer_get_bignum_ret: buffer_consume failed");
return (-1);
}
return (0);
}
void
buffer_consume(Buffer *buffer, u_int bytes)
{
if (buffer_consume_ret(buffer, bytes) == -1)
fatal("buffer_consume: buffer error");
}
void
buffer_consume(Buffer *buffer, u_int bytes)
{
if (buffer_consume_ret(buffer, bytes) == -1)
fatal("%s: buffer error", __func__);
}
void
buffer_consume(Buffer *buffer, uint32_t bytes)
{
if (buffer_consume_ret(buffer, bytes) == -1)
croak("buffer_consume: buffer error");
}