Introduction to OpenSSL
OpenSSL is a rich and self-contained open-source security toolbox. It provides the following main functions: SSL protocol implementation (including SSLv2, SSLv3 and tlsv1), a large number of soft algorithms (symmetric/asymmetric/abstract), big number calculation, asymmetric algorithm key generation, ASN.1 codec library, certificate request (pkcs10) encoding/decoding, digital certific
Encryption Algorithm:
Symmetric encryption algorithm:
Des, idea, RC2, RC4, AES, Skipjack ......
Asymmetric encryption algorithm:
RSA, DSA, diffiehellman, PKCS, PGP ......
The one-way hash algorithm is a packet Digest algorithm, although some are also from the OpenSSL library.Command operation:
1. generate a common private key:
[Weigw @ test SRC] $ OpenSSL genrsa-out privatekey. Key 1024Generating
Secure programming with the OpenSSL API
First, Concept: 1. What is SSL. SSL is an abbreviation, the full name is Secure Sockets Layer. It is the standard that supports secure communication over the Internet and integrates data cryptography into the protocol. The data is encrypted before it leaves your computer and is decrypted only if it reaches its intended target. The certificate and Cryptography algorithms support all of this, and with
I. Installation of OpenSSL1. Download the compressed package on the root directorywget http://www.openssl.org/source/openssl-1.0.2j.tar.gz2, under the folder decompression, get openssl-1.0.2j folderTar-xzf openssl-1.0.2j.tar.gz3. Enter the extracted directory:CD openssl-1.0.2j4, set the
Installation Environment:Operating system: CentOs6.3OpenSSL version:openssl-1.0.0e.tar.gzThe current version of the latest SSL address is http://www.openssl.org/source/openssl-1.0.0e.tar.gz1. Place the downloaded compressed package in the root directory,2, under the folder decompression, command: Tar-xzf openssl-openssl-1.0.0e.tar.gz, get
Create a Test Catalog mkdir/tmp/create_key/cacd/tmp/create_key/ certificate file Generation : One. Server-side 1. Generate the server-side private key (key file): OpenSSL genrsa-des3-out Server.key 1024 The runtime prompts for a password, which is used to encrypt the key file (the parameter des3 is an encryption algorithm or other secure algorithm), and every time a password is required to read the file (via the command or API provided by
PHP compiling OpenSSL steps for a module
recently we intend to use composer in the PHP framework to manage dependencies, but when we execute the composer installation command (below), we find that the OpenSSL Extension class library is not installed.
To install the composer command:
Sudocurl-s Https://getcomposer.org/installer | sudo php
The exception is as follows:
Some settings Onyour machine
I. Brief Introduction to OpenSSL is a powerful Secure Socket Layer password library, which includes the main cryptographic algorithms, common keys, certificate encapsulation management functions, and SSL protocols, and provides a wide range of applications for testing or other purposes. SSL is the abbreviation of SecureSocketsLayer (Secure Sockets Layer Protocol). It can provide confidential transmission over the Internet. SSL allows users/server appl
OpenSSL X509_NAME_oneline Function Denial of Service Vulnerability (CVE-2016-2176)OpenSSL X509_NAME_oneline Function Denial of Service Vulnerability (CVE-2016-2176)
Release date:Updated on:Affected Systems:
OpenSSL Project OpenSSL 1.0.2OpenSSL Project OpenSSL 1.0.1
Unaffecte
First, you need to understand some basic concepts before installing
1. Certificates used by SSL can be self-generated or signed by a commercial ca such as Verisign or thawte.
2. Certificate concept: First, you must have a root certificate, and then use the root certificate to issue the server certificate and customer certificate. Generally, the server certificate and customer certificate are in a hierarchical relationship. The root certificate and server certificate must be installed in SSL
The current version of OPENSSL-1.0.2J does not support Google's CHACHA20 encryption algorithm. The CHACHA20 encryption algorithm is relatively safe relative to RC4, and is optimized for ARM's mobile phone, making it faster and more power-saving.However, the latest Intel processors and ARM V8 processors are optimized for AES-GCM encryption algorithms through the AES-NI instruction set, which is much faster than chacha20, so the Aes-ni encryption algori
1. Overview of symmetric encryption algorithmsOpenSSL's cryptographic algorithm library provides a rich symmetric encryption algorithm that can be used in the form of symmetric cryptographic algorithm directives provided by OpenSSL, or by invoking the API provided by OpenSSL.OpenSSL's symmetric cryptographic algorithm directives are primarily used to encrypt and decrypt data, and OpenSSL basically provides
, Just as in reality each of us has to have a personal identity card or driver's license to indicate our identity or some kind of qualification. I. First, start building the root certificate 1, generate the CA's private key (key file) Span style= "Background-color:rgb (255, 255, 0); >ope nssl genrsa-out ca.key 1024x768 Here 's a little bit of this command: OpenSSL refers to entering the OpenSS
PHP to open the OpenSSL method, most of the OpenSSL is not open, to enable the need for a simple setting
windows open Method:
1: First check php.ini, extension=php_openssl.dll whether exist, if present remove the previous annotation character '; ', if it does not exist, then add Extension=php_openssl.dll.
2: Speak php folder under: Php_openssl.dll, Ssleay32.dll, Libeay32.dll 3 files copied to WINDOWSsyst
PHP to open the OpenSSL method, most of the OpenSSL is not open, to enable the need for a simple settingwindows open Method:
1: First check php.ini, extension=php_openssl.dll whether exist, if present remove the previous annotation character '; ', if it does not exist, then add Extension=php_openssl.dll.2: Speak php folder under: Php_openssl.dll, Ssleay32.dll, Libeay32.dll 3 files copied to windows\system3
Reprinted from: http://www.cnblogs.com/aLittleBitCool/archive/2011/09/22/2185418.html
OpenSSL is a powerful toolkit that integrates a wide range of cryptographic algorithms and utilities. We can use the command desk tools it provides to generate keys, certificates to encrypt and decrypt files, or to encrypt the transmitted information in code using the API interfaces it provides.
RSA is an asymmetric encryption algorithm. In short, the asymmetric enc
Search OpenSSL Heartbleed on the Internet to view tens of thousands of related content. Not only is online banking affected, but many security links encrypted through OpenSSL have certain risks. Therefore, it is best to upgrade all its OpenSSL as soon as possible.For example, the OpenSSL version of The RedHat system is
A few days ago to upgrade the system to 10.10.3, do not know how to card a B, plugged into the mobile hard drive WiFi connection (after reloading still), boot slowly unacceptable.Going to the weekend, to a thorough plate reload. Sure enough, the original kind of smooth and back.Start tossing, pretending Jdk,mysql,tomcat,idea ...Was about to compile nginx when suddenly floated a share @ Sweet potato Fragrance, immediately think of the OSC, The OSC uses Tengine, well, the idea is to keep up with t
OpenSSL req is used to generate a certificate request for a third party authority CA to issue and generate the certificate we need. The Req command can also invoke the X509 command for format conversion and display information such as Text,modulus in the certificate file. If you do not have a key pair, the REQ command can unified you to generate key pairs and certificate requests, or you can specify whether to encrypt the private key file.
1. Key, ce
OpenSSL promises to inform developers of sandbags in advance when a problem occurs.
In view of the recent hetbleed vulnerability, the OpenSSL Project decided that the Linux and Unix operating system publishers who use the popular OpenSSL encryption package will be notified in advance when OpenSSL releases security-rela
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