| // 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 ecc_ansi_x963_import.c |
| ECC Crypto, Tom St Denis |
| */ |
| |
| #ifdef LTC_MECC |
| |
| /** Import an ANSI X9.63 format public key |
| @param in The input data to read |
| @param inlen The length of the input data |
| @param key [out] destination to store imported key \ |
| */ |
| int ecc_ansi_x963_import(const unsigned char *in, unsigned long inlen, ecc_key *key) |
| { |
| return ecc_ansi_x963_import_ex(in, inlen, key, NULL); |
| } |
| |
| int ecc_ansi_x963_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, const ltc_ecc_curve *cu) |
| { |
| int err; |
| |
| LTC_ARGCHK(in != NULL); |
| LTC_ARGCHK(key != NULL); |
| |
| /* must be odd */ |
| if ((inlen & 1) == 0) { |
| return CRYPT_INVALID_ARG; |
| } |
| |
| /* initialize key->dp */ |
| if (cu == NULL) { |
| /* this case works only for uncompressed public keys */ |
| if ((err = ecc_set_curve_by_size((inlen-1)>>1, key)) != CRYPT_OK) { return err; } |
| } |
| else { |
| /* this one works for both compressed / uncompressed pubkeys */ |
| if ((err = ecc_set_curve(cu, key)) != CRYPT_OK) { return err; } |
| } |
| |
| /* load public key */ |
| if ((err = ecc_set_key((unsigned char *)in, inlen, PK_PUBLIC, key)) != CRYPT_OK) { return err; } |
| |
| /* we're done */ |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |