path: root/engines/e_dasync.c

/*
 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED

/*
 * SHA-1 low level APIs are deprecated for public use, but still ok for
 * internal use.  Note, that due to symbols not being exported, only the
 * #defines and strucures can be accessed, in this case SHA_CBLOCK and
 * sizeof(SHA_CTX).
 */
#include "internal/deprecated.h"

#include <openssl/opensslconf.h>
#if defined(_WIN32)
# include <windows.h>
#endif

#include <stdio.h>
#include <string.h>

#include <openssl/engine.h>
#include <openssl/sha.h>
#include <openssl/aes.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#include <openssl/async.h>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/ssl.h>
#include <openssl/modes.h>

#if defined(OPENSSL_SYS_UNIX) && defined(OPENSSL_THREADS)
# undef ASYNC_POSIX
# define ASYNC_POSIX
# include <unistd.h>
#elif defined(_WIN32)
# undef ASYNC_WIN
# define ASYNC_WIN
#endif

#include "e_dasync_err.c"

/* Engine Id and Name */
static const char *engine_dasync_id = "dasync";
static const char *engine_dasync_name = "Dummy Async engine support";


/* Engine Lifetime functions */
static int dasync_destroy(ENGINE *e);
static int dasync_init(ENGINE *e);
static int dasync_finish(ENGINE *e);
void engine_load_dasync_int(void);


/* Set up digests. Just SHA1 for now */
static int dasync_digests(ENGINE *e, const EVP_MD **digest,
                          const int **nids, int nid);

static void dummy_pause_job(void);

/* SHA1 */
static int dasync_sha1_init(EVP_MD_CTX *ctx);
static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
                             size_t count);
static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);

/*
 * Holds the EVP_MD object for sha1 in this engine. Set up once only during
 * engine bind and can then be reused many times.
 */
static EVP_MD *_hidden_sha1_md = NULL;
static const EVP_MD *dasync_sha1(void)
{
    return _hidden_sha1_md;
}
static void destroy_digests(void)
{
    EVP_MD_meth_free(_hidden_sha1_md);
    _hidden_sha1_md = NULL;
}

static int dasync_digest_nids(const int **nids)
{
    static int digest_nids[2] = { 0, 0 };
    static int pos = 0;
    static int init = 0;

    if (!init) {
        const EVP_MD *md;
        if ((md = dasync_sha1()) != NULL)
            digest_nids[pos++] = EVP_MD_get_type(md);
        digest_nids[pos] = 0;
        init = 1;
    }
    *nids = digest_nids;
    return pos;
}

/* RSA */
static int dasync_pkey(ENGINE *e, EVP_PKEY_METHOD **pmeth,
                       const int **pnids, int nid);

static int dasync_rsa_init(EVP_PKEY_CTX *ctx);
static void dasync_rsa_cleanup(EVP_PKEY_CTX *ctx);
static int dasync_rsa_paramgen_init(EVP_PKEY_CTX *ctx);
static int dasync_rsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
static int dasync_rsa_keygen_init(EVP_PKEY_CTX *ctx);
static int dasync_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
static int dasync_rsa_encrypt_init(EVP_PKEY_CTX *ctx);
static int dasync_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
                              size_t *outlen, const unsigned char *in,
                              size_t inlen);
static int dasync_rsa_decrypt_init(EVP_PKEY_CTX *ctx);
static int dasync_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
                              size_t *outlen, const unsigned char *in,
                              size_t inlen);
static int dasync_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
static int dasync_rsa_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
                               const char *value);

static EVP_PKEY_METHOD *dasync_rsa;
static const EVP_PKEY_METHOD *dasync_rsa_orig;

/* AES */

static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
                                  void *ptr);
static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                                  const unsigned char *iv, int enc);
static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char </