46 lines
1.3 KiB
C
46 lines
1.3 KiB
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_import_x509.c
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Import a X25519 key from a X.509 certificate, Steffen Jaeckel
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*/
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#ifdef LTC_CURVE25519
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static int s_x25519_decode(const unsigned char *in, unsigned long inlen, curve25519_key *key)
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{
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if (inlen != sizeof(key->pub)) return CRYPT_PK_INVALID_SIZE;
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XMEMCPY(key->pub, in, sizeof(key->pub));
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return CRYPT_OK;
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}
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/**
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Import a X25519 public key from a X.509 certificate
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@param in The DER encoded X.509 certificate
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@param inlen The length of the certificate
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@param key [out] Where to import the key to
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@return CRYPT_OK if successful, on error all allocated memory is freed automatically
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*/
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int x25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key)
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{
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int err;
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(key != NULL);
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if ((err = x509_decode_public_key_from_certificate(in, inlen,
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LTC_OID_X25519,
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LTC_ASN1_EOL, NULL, NULL,
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(public_key_decode_cb)s_x25519_decode, key)) != CRYPT_OK) {
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return err;
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}
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key->type = PK_PUBLIC;
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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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