/* ====================================================================
 * Copyright (c) 2016 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
#include <stdio.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <string.h>

#ifndef OPENSSL_NO_AFALGENG

/* Use a buffer size which is not aligned to block size */
#define BUFFER_SIZE     (8 * 1024) - 13

static int test_afalg_aes_128_cbc(ENGINE *e)
{
    EVP_CIPHER_CTX *ctx;
    const EVP_CIPHER *cipher = EVP_aes_128_cbc();
    unsigned char key[] = "\x5F\x4D\xCC\x3B\x5A\xA7\x65\xD6\
                           \x1D\x83\x27\xDE\xB8\x82\xCF\x99";
    unsigned char iv[] = "\x2B\x95\x99\x0A\x91\x51\x37\x4A\
                          \xBD\x8F\xF8\xC5\xA7\xA0\xFE\x08";

    unsigned char in[BUFFER_SIZE];
    unsigned char ebuf[BUFFER_SIZE + 32];
    unsigned char dbuf[BUFFER_SIZE + 32];
    int encl, encf, decl, decf;
    unsigned int status = 0;

    ctx = EVP_CIPHER_CTX_new();
    if (ctx == NULL) {
        fprintf(stderr, "%s() failed to allocate ctx\n", __func__);
        return 0;
    }
    EVP_CIPHER_CTX_init(ctx);
    RAND_bytes(in, BUFFER_SIZE);

    if (       !EVP_CipherInit_ex(ctx, cipher, e, key, iv, 1)
            || !EVP_CipherUpdate(ctx, ebuf, &encl, in, BUFFER_SIZE)
            || !EVP_CipherFinal_ex(ctx, ebuf+encl, &encf)) {
        fprintf(stderr, "%s() failed encryption\n", __func__);
        goto end;
    }
    encl += encf;

    if (       !EVP_CIPHER_CTX_reset(ctx)
            || !EVP_CipherInit_ex(ctx, cipher, e, key, iv, 0)
            || !EVP_CipherUpdate(ctx, dbuf, &decl, ebuf, encl)
            || !EVP_CipherFinal_ex(ctx, dbuf+decl, &decf)) {
        fprintf(stderr, "%s() failed decryption\n", __func__);
        goto end;
    }
    decl += decf;

    if (       decl != BUFFER_SIZE
            || memcmp(dbuf, in, BUFFER_SIZE)) {
        fprintf(stderr, "%s() failed Dec(Enc(P)) != P\n", __func__);
        goto end;
    }

    status = 1;

 end:
    EVP_CIPHER_CTX_free(ctx);
    return status;
}
#endif

int main(int argc, char **argv)
{
#ifdef OPENSSL_NO_AFALGENG
    fprintf(stderr, "AFALG not supported - skipping AFALG tests\n");
#else

    ENGINE *e;

    CRYPTO_set_mem_debug(1);
    CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

    ENGINE_load_builtin_engines();

# ifndef OPENSSL_NO_STATIC_ENGINE
    OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_AFALG, NULL);
# endif

    e = ENGINE_by_id("afalg");
    if (e == NULL) {
        fprintf(stderr, "AFALG Test: Failed to load AFALG Engine\n");
        return 1;
    }

    if (test_afalg_aes_128_cbc(e) == 0) {
        ENGINE_free(e);
        return 1;
    }

    ENGINE_free(e);
#endif
    printf("PASS\n");
    return 0;
}