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Uname:Linux wp 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023 x86_64

Base Dir : /var/www/eduesan

User : www-data


403WebShell
403Webshell
Server IP : 202.131.237.196  /  Your IP : 216.73.216.192
Web Server : nginx/1.14.0
System : Linux wp 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023 x86_64
User : www-data ( 33)
PHP Version : 7.2.24-0ubuntu0.18.04.17
Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : ON  |  Python : ON  |  Sudo : ON  |  Pkexec : ON
Directory :  /www/server/nginx/src/openssl/crypto/ec/

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Current File : /www/server/nginx/src/openssl/crypto/ec/ecdh_kdf.c
/*
 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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
 */

#include <string.h>
#include <openssl/ec.h>
#include <openssl/evp.h>
#include "ec_lcl.h"

/* Key derivation function from X9.63/SECG */
/* Way more than we will ever need */
#define ECDH_KDF_MAX    (1 << 30)

int ecdh_KDF_X9_63(unsigned char *out, size_t outlen,
                   const unsigned char *Z, size_t Zlen,
                   const unsigned char *sinfo, size_t sinfolen,
                   const EVP_MD *md)
{
    EVP_MD_CTX *mctx = NULL;
    int rv = 0;
    unsigned int i;
    size_t mdlen;
    unsigned char ctr[4];
    if (sinfolen > ECDH_KDF_MAX || outlen > ECDH_KDF_MAX
        || Zlen > ECDH_KDF_MAX)
        return 0;
    mctx = EVP_MD_CTX_new();
    if (mctx == NULL)
        return 0;
    mdlen = EVP_MD_size(md);
    for (i = 1;; i++) {
        unsigned char mtmp[EVP_MAX_MD_SIZE];
        if (!EVP_DigestInit_ex(mctx, md, NULL))
            goto err;
        ctr[3] = i & 0xFF;
        ctr[2] = (i >> 8) & 0xFF;
        ctr[1] = (i >> 16) & 0xFF;
        ctr[0] = (i >> 24) & 0xFF;
        if (!EVP_DigestUpdate(mctx, Z, Zlen))
            goto err;
        if (!EVP_DigestUpdate(mctx, ctr, sizeof(ctr)))
            goto err;
        if (!EVP_DigestUpdate(mctx, sinfo, sinfolen))
            goto err;
        if (outlen >= mdlen) {
            if (!EVP_DigestFinal(mctx, out, NULL))
                goto err;
            outlen -= mdlen;
            if (outlen == 0)
                break;
            out += mdlen;
        } else {
            if (!EVP_DigestFinal(mctx, mtmp, NULL))
                goto err;
            memcpy(out, mtmp, outlen);
            OPENSSL_cleanse(mtmp, mdlen);
            break;
        }
    }
    rv = 1;
 err:
    EVP_MD_CTX_free(mctx);
    return rv;
}

/*-
 * The old name for ecdh_KDF_X9_63
 * Retained for ABI compatibility
 */
int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
                   const unsigned char *Z, size_t Zlen,
                   const unsigned char *sinfo, size_t sinfolen,
                   const EVP_MD *md)
{
    return ecdh_KDF_X9_63(out, outlen, Z, Zlen, sinfo, sinfolen, md);
}

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