[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/rand.h>
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| 13 | #include <openssl/rsa.h>
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| 14 | #include <openssl/evp.h>
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| 15 | #include <openssl/objects.h>
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| 16 | #include <openssl/x509.h>
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| 17 |
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| 18 | int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
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| 19 | unsigned char **ek, int *ekl, unsigned char *iv,
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| 20 | EVP_PKEY **pubk, int npubk)
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| 21 | {
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| 22 | unsigned char key[EVP_MAX_KEY_LENGTH];
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| 23 | int i;
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| 24 |
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| 25 | if (type) {
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| 26 | EVP_CIPHER_CTX_reset(ctx);
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| 27 | if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL))
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| 28 | return 0;
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| 29 | }
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| 30 | if ((npubk <= 0) || !pubk)
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| 31 | return 1;
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| 32 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
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| 33 | return 0;
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| 34 | if (EVP_CIPHER_CTX_iv_length(ctx)
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| 35 | && RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0)
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| 36 | return 0;
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| 37 |
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| 38 | if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
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| 39 | return 0;
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| 40 |
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| 41 | for (i = 0; i < npubk; i++) {
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| 42 | ekl[i] =
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| 43 | EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx),
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| 44 | pubk[i]);
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| 45 | if (ekl[i] <= 0)
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| 46 | return (-1);
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| 47 | }
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| 48 | return (npubk);
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| 49 | }
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| 50 |
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| 51 | /*- MACRO
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| 52 | void EVP_SealUpdate(ctx,out,outl,in,inl)
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| 53 | EVP_CIPHER_CTX *ctx;
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| 54 | unsigned char *out;
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| 55 | int *outl;
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| 56 | unsigned char *in;
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| 57 | int inl;
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| 58 | {
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| 59 | EVP_EncryptUpdate(ctx,out,outl,in,inl);
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| 60 | }
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| 61 | */
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| 62 |
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| 63 | int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
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| 64 | {
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| 65 | int i;
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| 66 | i = EVP_EncryptFinal_ex(ctx, out, outl);
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| 67 | if (i)
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| 68 | i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL);
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| 69 | return i;
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| 70 | }
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