| // SPDX-License-Identifier: BSD-2-Clause |
| /* 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_private.h" |
| |
| /** |
| @file x25519_make_key.c |
| Create a X25519 key, Steffen Jaeckel |
| */ |
| |
| #ifdef LTC_CURVE25519 |
| |
| /** |
| Create a X25519 key |
| @param prng An active PRNG state |
| @param wprng The index of the PRNG desired |
| @param key [out] Destination of a newly created private key pair |
| @return CRYPT_OK if successful |
| */ |
| int x25519_make_key(prng_state *prng, int wprng, curve25519_key *key) |
| { |
| int err; |
| |
| LTC_ARGCHK(prng != NULL); |
| LTC_ARGCHK(key != NULL); |
| |
| if ((err = prng_is_valid(wprng)) != CRYPT_OK) { |
| return err; |
| } |
| |
| if (prng_descriptor[wprng]->read(key->priv, sizeof(key->priv), prng) != sizeof(key->priv)) { |
| return CRYPT_ERROR_READPRNG; |
| } |
| |
| tweetnacl_crypto_scalarmult_base(key->pub, key->priv); |
| |
| key->type = PK_PRIVATE; |
| key->algo = PKA_X25519; |
| |
| return err; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |