43 lines
956 B
C
43 lines
956 B
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt_private.h"
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/**
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@file x25519_make_key.c
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Create a X25519 key, Steffen Jaeckel
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*/
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#ifdef LTC_CURVE25519
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/**
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Create a X25519 key
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@param prng An active PRNG state
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@param wprng The index of the PRNG desired
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@param key [out] Destination of a newly created private key pair
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@return CRYPT_OK if successful
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*/
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int x25519_make_key(prng_state *prng, int wprng, curve25519_key *key)
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{
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int err;
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LTC_ARGCHK(prng != NULL);
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LTC_ARGCHK(key != NULL);
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if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
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return err;
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}
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if (prng_descriptor[wprng].read(key->priv, sizeof(key->priv), prng) != sizeof(key->priv)) {
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return CRYPT_ERROR_READPRNG;
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}
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tweetnacl_crypto_scalarmult_base(key->pub, key->priv);
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key->type = PK_PRIVATE;
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key->pka = LTC_PKA_X25519;
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return err;
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}
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#endif
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