| // 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" |
| |
| #ifdef LTC_MECC |
| |
| /** Export raw public or private key (public keys = ANS X9.63 compressed or uncompressed; private keys = raw bytes) |
| @param out [out] destination of export |
| @param outlen [in/out] Length of destination and final output size |
| @param type PK_PRIVATE, PK_PUBLIC or PK_PUBLIC|PK_COMPRESSED |
| @param key Key to export |
| Return CRYPT_OK on success |
| */ |
| |
| int ecc_get_key(unsigned char *out, unsigned long *outlen, int type, const ecc_key *key) |
| { |
| unsigned long size, ksize; |
| int err, compressed; |
| |
| LTC_ARGCHK(key != NULL); |
| LTC_ARGCHK(out != NULL); |
| LTC_ARGCHK(outlen != NULL); |
| |
| size = key->dp.size; |
| compressed = type & PK_COMPRESSED ? 1 : 0; |
| type &= ~PK_COMPRESSED; |
| |
| if (type == PK_PUBLIC) { |
| if ((err = ltc_ecc_export_point(out, outlen, key->pubkey.x, key->pubkey.y, size, compressed)) != CRYPT_OK) { |
| return err; |
| } |
| } |
| else if (type == PK_PRIVATE) { |
| if (key->type != PK_PRIVATE) return CRYPT_PK_TYPE_MISMATCH; |
| *outlen = size; |
| if (size > *outlen) return CRYPT_BUFFER_OVERFLOW; |
| if ((ksize = mp_unsigned_bin_size(key->k)) > size) return CRYPT_BUFFER_OVERFLOW; |
| /* pad and store k */ |
| if ((err = mp_to_unsigned_bin(key->k, out + (size - ksize))) != CRYPT_OK) return err; |
| zeromem(out, size - ksize); |
| } |
| else { |
| return CRYPT_INVALID_ARG; |
| } |
| |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |
