55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
|
|
/* SPDX-License-Identifier: Unlicense */
|
|
#include "tomcrypt_private.h"
|
|
|
|
#if defined(LTC_MECC) && defined(LTC_DER)
|
|
|
|
static int s_ecc_import_x509_with_oid(const unsigned char *in, unsigned long inlen, ecc_key *key)
|
|
{
|
|
unsigned char bin_xy[2*ECC_MAXSIZE+2];
|
|
unsigned long curveoid[16];
|
|
unsigned long len_xy, len_oid;
|
|
int err;
|
|
|
|
len_xy = sizeof(bin_xy);
|
|
len_oid = 16;
|
|
err = x509_decode_subject_public_key_info(in, inlen, LTC_OID_EC, bin_xy, &len_xy,
|
|
LTC_ASN1_OBJECT_IDENTIFIER, (void *)curveoid, &len_oid);
|
|
if (err != CRYPT_OK) { goto error; }
|
|
err = ecc_import_with_oid(bin_xy, len_xy, curveoid, len_oid, PK_PUBLIC, key);
|
|
error:
|
|
return err;
|
|
}
|
|
|
|
int ecc_import_subject_public_key_info(const unsigned char *in, unsigned long inlen, ecc_key *key)
|
|
{
|
|
int err;
|
|
|
|
if ((err = s_ecc_import_x509_with_oid(in, inlen, key)) == CRYPT_OK) {
|
|
goto success;
|
|
}
|
|
|
|
err = ecc_import_with_curve(in, inlen, PK_PUBLIC, key);
|
|
|
|
success:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
Import an ECC key from a X.509 certificate
|
|
@param in The packet to import from
|
|
@param inlen It's length (octets)
|
|
@param key [out] Destination for newly imported key
|
|
@return CRYPT_OK if successful, upon error allocated memory is freed
|
|
*/
|
|
int ecc_import_x509(const unsigned char *in, unsigned long inlen, ecc_key *key)
|
|
{
|
|
return x509_decode_public_key_from_certificate(in, inlen,
|
|
LTC_OID_EC,
|
|
LTC_ASN1_EOL, NULL, NULL,
|
|
(public_key_decode_cb)ecc_import_subject_public_key_info, key);
|
|
}
|
|
|
|
#endif /* LTC_MECC */
|
|
|