/src/boringssl/crypto/evp/p_x25519.c

Source (jump to first uncovered line)
/* Copyright (c) 2019, 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"


// X25519 has no parameters to copy.
static int pkey_x25519_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) { return 1; }

static int pkey_x25519_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) {
  X25519_KEY *key = OPENSSL_malloc(sizeof(X25519_KEY));
  if (key == NULL) {
    return 0;
  }

  evp_pkey_set_method(pkey, &x25519_asn1_meth);

  X25519_keypair(key->pub, key->priv);
  key->has_private = 1;

  OPENSSL_free(pkey->pkey);
  pkey->pkey = key;
  return 1;
}

static int pkey_x25519_derive(EVP_PKEY_CTX *ctx, uint8_t *out,
                              size_t *out_len) {
  if (ctx->pkey == NULL || ctx->peerkey == NULL) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_KEYS_NOT_SET);
    return 0;
  }

  const X25519_KEY *our_key = ctx->pkey->pkey;
  const X25519_KEY *peer_key = ctx->peerkey->pkey;
  if (our_key == NULL || peer_key == NULL) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_KEYS_NOT_SET);
    return 0;
  }

  if (!our_key->has_private) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_NOT_A_PRIVATE_KEY);
    return 0;
  }

  if (out != NULL) {
    if (*out_len < 32) {
      OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
      return 0;
    }
    if (!X25519(out, our_key->priv, peer_key->pub)) {
      OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PEER_KEY);
      return 0;
    }
  }

  *out_len = 32;
  return 1;
}

static int pkey_x25519_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) {
  switch (type) {
    case EVP_PKEY_CTRL_PEER_KEY:
      // |EVP_PKEY_derive_set_peer| requires the key implement this command,
      // even if it is a no-op.
      return 1;

    default:
      OPENSSL_PUT_ERROR(EVP, EVP_R_COMMAND_NOT_SUPPORTED);
      return 0;
  }
}

const EVP_PKEY_METHOD x25519_pkey_meth = {
    EVP_PKEY_X25519,
    NULL /* init */,
    pkey_x25519_copy,
    NULL /* cleanup */,
    pkey_x25519_keygen,
    NULL /* sign */,
    NULL /* sign_message */,
    NULL /* verify */,
    NULL /* verify_message */,
    NULL /* verify_recover */,
    NULL /* encrypt */,
    NULL /* decrypt */,
    pkey_x25519_derive,
    NULL /* paramgen */,
    pkey_x25519_ctrl,
};

Line	Count	Source (jump to first uncovered line)
1		/* Copyright (c) 2019, 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		// X25519 has no parameters to copy.
25	0	static int pkey_x25519_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src) { return 1; }
26
27	0	static int pkey_x25519_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey) {
28	0	X25519_KEY *key = OPENSSL_malloc(sizeof(X25519_KEY));
29	0	if (key == NULL) {
30	0	return 0;
31	0	}
32
33	0	evp_pkey_set_method(pkey, &x25519_asn1_meth);
34
35	0	X25519_keypair(key->pub, key->priv);
36	0	key->has_private = 1;
37
38	0	OPENSSL_free(pkey->pkey);
39	0	pkey->pkey = key;
40	0	return 1;
41	0	}
42
43		static int pkey_x25519_derive(EVP_PKEY_CTX ctx, uint8_t out,
44	0	size_t *out_len) {
45	0	if (ctx->pkey == NULL \|\| ctx->peerkey == NULL) {
46	0	OPENSSL_PUT_ERROR(EVP, EVP_R_KEYS_NOT_SET);
47	0	return 0;
48	0	}
49
50	0	const X25519_KEY *our_key = ctx->pkey->pkey;
51	0	const X25519_KEY *peer_key = ctx->peerkey->pkey;
52	0	if (our_key == NULL \|\| peer_key == NULL) {
53	0	OPENSSL_PUT_ERROR(EVP, EVP_R_KEYS_NOT_SET);
54	0	return 0;
55	0	}
56
57	0	if (!our_key->has_private) {
58	0	OPENSSL_PUT_ERROR(EVP, EVP_R_NOT_A_PRIVATE_KEY);
59	0	return 0;
60	0	}
61
62	0	if (out != NULL) {
63	0	if (*out_len < 32) {
64	0	OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
65	0	return 0;
66	0	}
67	0	if (!X25519(out, our_key->priv, peer_key->pub)) {
68	0	OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PEER_KEY);
69	0	return 0;
70	0	}
71	0	}
72
73	0	*out_len = 32;
74	0	return 1;
75	0	}
76
77	0	static int pkey_x25519_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2) {
78	0	switch (type) {
79	0	case EVP_PKEY_CTRL_PEER_KEY:
80		// \|EVP_PKEY_derive_set_peer\| requires the key implement this command,
81		// even if it is a no-op.
82	0	return 1;
83
84	0	default:
85	0	OPENSSL_PUT_ERROR(EVP, EVP_R_COMMAND_NOT_SUPPORTED);
86	0	return 0;
87	0	}
88	0	}
89
90		const EVP_PKEY_METHOD x25519_pkey_meth = {
91		EVP_PKEY_X25519,
92		NULL /* init */,
93		pkey_x25519_copy,
94		NULL /* cleanup */,
95		pkey_x25519_keygen,
96		NULL /* sign */,
97		NULL /* sign_message */,
98		NULL /* verify */,
99		NULL /* verify_message */,
100		NULL /* verify_recover */,
101		NULL /* encrypt */,
102		NULL /* decrypt */,
103		pkey_x25519_derive,
104		NULL /* paramgen */,
105		pkey_x25519_ctrl,
106		};

Coverage Report

Created: 2024-11-21 07:03