2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/rand.h>
13 #include <openssl/rsa.h>
14 #include <openssl/evp.h>
15 #include <openssl/objects.h>
16 #include <openssl/x509.h>
18 int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
19 unsigned char **ek, int *ekl, unsigned char *iv,
20 EVP_PKEY **pubk, int npubk)
22 unsigned char key[EVP_MAX_KEY_LENGTH];
27 EVP_CIPHER_CTX_reset(ctx);
28 if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL))
31 if ((npubk <= 0) || !pubk)
34 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
37 if (EVP_CIPHER_CTX_iv_length(ctx)
38 && RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0)
41 if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
44 for (i = 0; i < npubk; i++) {
45 size_t keylen = EVP_CIPHER_CTX_key_length(ctx);
46 EVP_PKEY_CTX *pctx = NULL;
48 if ((pctx = EVP_PKEY_CTX_new(pubk[i], NULL)) == NULL) {
49 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
53 if (EVP_PKEY_encrypt_init(pctx) <= 0
54 || EVP_PKEY_encrypt(pctx, ek[i], &keylen, key, keylen) <= 0)
57 EVP_PKEY_CTX_free(pctx);
61 OPENSSL_cleanse(key, sizeof(key));
65 int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
68 i = EVP_EncryptFinal_ex(ctx, out, outl);
70 i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL);