1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis */
2 /* SPDX-License-Identifier: Unlicense */
3 #include "tomcrypt_private.h"
4
5 /**
6 @file ed25519_import_x509.c
7 Import an Ed25519 key from a X.509 certificate, Steffen Jaeckel
8 */
9
10 #ifdef LTC_CURVE25519
11
s_ed25519_decode(const unsigned char * in,unsigned long inlen,curve25519_key * key)12 static int s_ed25519_decode(const unsigned char *in, unsigned long inlen, curve25519_key *key)
13 {
14 if (inlen != sizeof(key->pub)) return CRYPT_PK_INVALID_SIZE;
15 XMEMCPY(key->pub, in, sizeof(key->pub));
16 return CRYPT_OK;
17 }
18
19 /**
20 Import an Ed25519 public key from a X.509 certificate
21 @param in The DER encoded X.509 certificate
22 @param inlen The length of the certificate
23 @param key [out] Where to import the key to
24 @return CRYPT_OK if successful, on error all allocated memory is freed automatically
25 */
ed25519_import_x509(const unsigned char * in,unsigned long inlen,curve25519_key * key)26 int ed25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key)
27 {
28 int err;
29
30 LTC_ARGCHK(in != NULL);
31 LTC_ARGCHK(key != NULL);
32
33 if ((err = x509_decode_public_key_from_certificate(in, inlen,
34 LTC_OID_ED25519,
35 LTC_ASN1_EOL, NULL, NULL,
36 (public_key_decode_cb)s_ed25519_decode, key)) != CRYPT_OK) {
37 return err;
38 }
39 key->type = PK_PUBLIC;
40 key->algo = LTC_OID_ED25519;
41
42 return err;
43 }
44
45 #endif
46