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65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/rand.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
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unsigned char **ek, int *ekl, unsigned char *iv,
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EVP_PKEY **pubk, int npubk)
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{
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unsigned char key[EVP_MAX_KEY_LENGTH];
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int i;
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int rv = 0;
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if (type) {
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EVP_CIPHER_CTX_reset(ctx);
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if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL))
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return 0;
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}
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if ((npubk <= 0) || !pubk)
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return 1;
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if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
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return 0;
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if (EVP_CIPHER_CTX_iv_length(ctx)
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&& RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0)
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goto err;
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if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
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goto err;
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for (i = 0; i < npubk; i++) {
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ekl[i] =
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EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx),
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pubk[i]);
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if (ekl[i] <= 0) {
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rv = -1;
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goto err;
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}
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}
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rv = npubk;
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err:
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OPENSSL_cleanse(key, sizeof(key));
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return rv;
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}
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int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
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{
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int i;
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i = EVP_EncryptFinal_ex(ctx, out, outl);
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if (i)
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i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL);
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return i;
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}
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