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