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/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
#include "tomcrypt_private.h"
/**
@file x25519_import_x509.c
Import a X25519 key from a X.509 certificate, Steffen Jaeckel
*/
#ifdef LTC_CURVE25519
static int s_x25519_decode(const unsigned char *in, unsigned long inlen, curve25519_key *key)
{
if (inlen != sizeof(key->pub)) return CRYPT_PK_INVALID_SIZE;
XMEMCPY(key->pub, in, sizeof(key->pub));
return CRYPT_OK;
}
/**
Import a X25519 public key from a X.509 certificate
@param in The DER encoded X.509 certificate
@param inlen The length of the certificate
@param key [out] Where to import the key to
@return CRYPT_OK if successful, on error all allocated memory is freed automatically
*/
int x25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key)
{
int err;
LTC_ARGCHK(in != NULL);
LTC_ARGCHK(key != NULL);
if ((err = x509_decode_public_key_from_certificate(in, inlen,
PKA_X25519,
LTC_ASN1_EOL, NULL, NULL,
(public_key_decode_cb)s_x25519_decode, key)) != CRYPT_OK) {
return err;
}
key->type = PK_PUBLIC;
key->algo = PKA_X25519;
return err;
}
#endif
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