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- /* Copyright (c) 2017, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include <openssl/evp.h>
-
- #include <openssl/curve25519.h>
- #include <openssl/err.h>
-
- #include "internal.h"
-
-
- // Ed25519 has no parameters to copy.
- static int pkey_ed25519_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) { return 1; }
-
- static int pkey_ed25519_sign_message(EVP_PKEY_CTX *ctx, uint8_t *sig,
- size_t *siglen, const uint8_t *tbs,
- size_t tbslen) {
- ED25519_KEY *key = ctx->pkey->pkey.ptr;
- if (!key->has_private) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_NOT_A_PRIVATE_KEY);
- return 0;
- }
-
- *siglen = 64;
- if (sig == NULL) {
- return 1;
- }
-
- return ED25519_sign(sig, tbs, tbslen, key->key.priv);
- }
-
- static int pkey_ed25519_verify_message(EVP_PKEY_CTX *ctx, const uint8_t *sig,
- size_t siglen, const uint8_t *tbs,
- size_t tbslen) {
- ED25519_KEY *key = ctx->pkey->pkey.ptr;
- if (siglen != 64 ||
- !ED25519_verify(tbs, tbslen, sig, key->key.pub.value)) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_SIGNATURE);
- return 0;
- }
-
- return 1;
- }
-
- const EVP_PKEY_METHOD ed25519_pkey_meth = {
- EVP_PKEY_ED25519,
- NULL /* init */,
- pkey_ed25519_copy,
- NULL /* cleanup */,
- NULL /* keygen */,
- NULL /* sign */,
- pkey_ed25519_sign_message,
- NULL /* verify */,
- pkey_ed25519_verify_message,
- NULL /* verify_recover */,
- NULL /* encrypt */,
- NULL /* decrypt */,
- NULL /* derive */,
- NULL /* ctrl */,
- };
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