/src/boringssl/crypto/evp/p_ed25519.c

Source (jump to first uncovered line)
/* 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 <openssl/mem.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_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) {
  ED25519_KEY *key = OPENSSL_malloc(sizeof(ED25519_KEY));
  if (key == NULL) {
    return 0;
  }

  evp_pkey_set_method(pkey, &ed25519_asn1_meth);

  uint8_t pubkey_unused[32];
  ED25519_keypair(pubkey_unused, key->key);
  key->has_private = 1;

  OPENSSL_free(pkey->pkey);
  pkey->pkey = key;
  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) {
  const ED25519_KEY *key = ctx->pkey->pkey;
  if (!key->has_private) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_NOT_A_PRIVATE_KEY);
    return 0;
  }

  if (sig == NULL) {
    *siglen = 64;
    return 1;
  }

  if (*siglen < 64) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
    return 0;
  }

  if (!ED25519_sign(sig, tbs, tbslen, key->key)) {
    return 0;
  }

  *siglen = 64;
  return 1;
}

static int pkey_ed25519_verify_message(EVP_PKEY_CTX *ctx, const uint8_t *sig,
                                       size_t siglen, const uint8_t *tbs,
                                       size_t tbslen) {
  const ED25519_KEY *key = ctx->pkey->pkey;
  if (siglen != 64 ||
      !ED25519_verify(tbs, tbslen, sig, key->key + ED25519_PUBLIC_KEY_OFFSET)) {
    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 */,
    pkey_ed25519_keygen,
    NULL /* sign */,
    pkey_ed25519_sign_message,
    NULL /* verify */,
    pkey_ed25519_verify_message,
    NULL /* verify_recover */,
    NULL /* encrypt */,
    NULL /* decrypt */,
    NULL /* derive */,
    NULL /* paramgen */,
    NULL /* ctrl */,
};

Line	Count	Source (jump to first uncovered line)
1		/* Copyright (c) 2017, Google Inc.
2		*
3		* Permission to use, copy, modify, and/or distribute this software for any
4		* purpose with or without fee is hereby granted, provided that the above
5		* copyright notice and this permission notice appear in all copies.
6		*
7		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10		* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12		* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13		* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15		#include <openssl/evp.h>
16
17		#include <openssl/curve25519.h>
18		#include <openssl/err.h>
19		#include <openssl/mem.h>
20
21		#include "internal.h"
22
23
24		// Ed25519 has no parameters to copy.
25	0	static int pkey_ed25519_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src) { return 1; }
26
27	0	static int pkey_ed25519_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey) {
28	0	ED25519_KEY *key = OPENSSL_malloc(sizeof(ED25519_KEY));
29	0	if (key == NULL) {
30	0	return 0;
31	0	}
32
33	0	evp_pkey_set_method(pkey, &ed25519_asn1_meth);
34
35	0	uint8_t pubkey_unused[32];
36	0	ED25519_keypair(pubkey_unused, key->key);
37	0	key->has_private = 1;
38
39	0	OPENSSL_free(pkey->pkey);
40	0	pkey->pkey = key;
41	0	return 1;
42	0	}
43
44		static int pkey_ed25519_sign_message(EVP_PKEY_CTX ctx, uint8_t sig,
45		size_t siglen, const uint8_t tbs,
46	0	size_t tbslen) {
47	0	const ED25519_KEY *key = ctx->pkey->pkey;
48	0	if (!key->has_private) {
49	0	OPENSSL_PUT_ERROR(EVP, EVP_R_NOT_A_PRIVATE_KEY);
50	0	return 0;
51	0	}
52
53	0	if (sig == NULL) {
54	0	*siglen = 64;
55	0	return 1;
56	0	}
57
58	0	if (*siglen < 64) {
59	0	OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
60	0	return 0;
61	0	}
62
63	0	if (!ED25519_sign(sig, tbs, tbslen, key->key)) {
64	0	return 0;
65	0	}
66
67	0	*siglen = 64;
68	0	return 1;
69	0	}
70
71		static int pkey_ed25519_verify_message(EVP_PKEY_CTX ctx, const uint8_t sig,
72		size_t siglen, const uint8_t *tbs,
73	0	size_t tbslen) {
74	0	const ED25519_KEY *key = ctx->pkey->pkey;
75	0	if (siglen != 64 \|\|
76	0	!ED25519_verify(tbs, tbslen, sig, key->key + ED25519_PUBLIC_KEY_OFFSET)) {
77	0	OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_SIGNATURE);
78	0	return 0;
79	0	}
80
81	0	return 1;
82	0	}
83
84		const EVP_PKEY_METHOD ed25519_pkey_meth = {
85		EVP_PKEY_ED25519,
86		NULL /* init */,
87		pkey_ed25519_copy,
88		NULL /* cleanup */,
89		pkey_ed25519_keygen,
90		NULL /* sign */,
91		pkey_ed25519_sign_message,
92		NULL /* verify */,
93		pkey_ed25519_verify_message,
94		NULL /* verify_recover */,
95		NULL /* encrypt */,
96		NULL /* decrypt */,
97		NULL /* derive */,
98		NULL /* paramgen */,
99		NULL /* ctrl */,
100		};

Coverage Report

Created: 2024-11-21 07:03