| // SPDX-License-Identifier: BSD-2-Clause |
| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| */ |
| #include "tomcrypt_private.h" |
| |
| /** |
| @file rsa_import.c |
| Import an RSA key from a X.509 certificate, Steffen Jaeckel |
| */ |
| |
| #ifdef LTC_MRSA |
| |
| static int _rsa_decode(const unsigned char *in, unsigned long inlen, rsa_key *key) |
| { |
| /* now it should be SEQUENCE { INTEGER, INTEGER } */ |
| return der_decode_sequence_multi(in, inlen, |
| LTC_ASN1_INTEGER, 1UL, key->N, |
| LTC_ASN1_INTEGER, 1UL, key->e, |
| LTC_ASN1_EOL, 0UL, NULL); |
| } |
| |
| /** |
| Import an RSA 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 rsa_import_x509(const unsigned char *in, unsigned long inlen, rsa_key *key) |
| { |
| int err; |
| |
| LTC_ARGCHK(in != NULL); |
| LTC_ARGCHK(key != NULL); |
| LTC_ARGCHK(ltc_mp.name != NULL); |
| |
| /* init key */ |
| if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, |
| &key->dP, &key->qP, &key->p, &key->q, NULL)) != CRYPT_OK) { |
| return err; |
| } |
| |
| if ((err = x509_decode_public_key_from_certificate(in, inlen, |
| PKA_RSA, LTC_ASN1_NULL, |
| NULL, NULL, |
| (public_key_decode_cb)_rsa_decode, key)) != CRYPT_OK) { |
| rsa_free(key); |
| } else { |
| key->type = PK_PUBLIC; |
| } |
| |
| return err; |
| } |
| |
| #endif /* LTC_MRSA */ |
| |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |