| // 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 ed25519_shared_secret.c |
| Create an Ed25519 signature, Steffen Jaeckel |
| */ |
| |
| #ifdef LTC_CURVE25519 |
| |
| /** |
| Create an Ed25519 signature. |
| @param private_key The private Ed25519 key in the pair |
| @param public_key The public Ed25519 key in the pair |
| @param out [out] The destination of the shared data |
| @param outlen [in/out] The max size and resulting size of the shared data. |
| @return CRYPT_OK if successful |
| */ |
| int ed25519_sign(const unsigned char *msg, unsigned long msglen, |
| unsigned char *sig, unsigned long *siglen, |
| const curve25519_key *private_key) |
| { |
| unsigned char *s; |
| unsigned long long smlen; |
| int err; |
| |
| LTC_ARGCHK(msg != NULL); |
| LTC_ARGCHK(sig != NULL); |
| LTC_ARGCHK(siglen != NULL); |
| LTC_ARGCHK(private_key != NULL); |
| |
| if (private_key->algo != PKA_ED25519) return CRYPT_PK_INVALID_TYPE; |
| if (private_key->type != PK_PRIVATE) return CRYPT_PK_INVALID_TYPE; |
| |
| if (*siglen < 64uL) { |
| *siglen = 64uL; |
| return CRYPT_BUFFER_OVERFLOW; |
| } |
| |
| smlen = msglen + 64; |
| s = XMALLOC(smlen); |
| if (s == NULL) return CRYPT_MEM; |
| |
| err = tweetnacl_crypto_sign(s, &smlen, |
| msg, msglen, |
| private_key->priv, private_key->pub); |
| |
| XMEMCPY(sig, s, 64uL); |
| *siglen = 64uL; |
| |
| #ifdef LTC_CLEAN_STACK |
| zeromem(s, smlen); |
| #endif |
| XFREE(s); |
| |
| return err; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |