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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/
#include "tomcrypt.h"
#ifdef LTC_MDH
/**
Binary export a DH key to a buffer
@param out [out] The destination for the key
@param outlen [in/out] The max size and resulting size of the DH key
@param type Which type of key (PK_PRIVATE or PK_PUBLIC)
@param key The key you wish to export
@return CRYPT_OK if successful
*/
int dh_export_key(void *out, unsigned long *outlen, int type, dh_key *key)
{
unsigned long len;
void *k;
LTC_ARGCHK(out != NULL);
LTC_ARGCHK(outlen != NULL);
LTC_ARGCHK(key != NULL);
k = (type == PK_PRIVATE) ? key->x : key->y;
len = mp_unsigned_bin_size(k);
if (*outlen < len) {
*outlen = len;
return CRYPT_BUFFER_OVERFLOW;
}
*outlen = len;
return mp_to_unsigned_bin(k, out);
}
#endif /* LTC_MDH */
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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