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OpenSSL "verify" - Verify or Validate Certificate
How to verify or validate a certificate using OpenSSL "verify" command? I got a certificate from the Web site server and want to see if it is valid. If you have a certificate stored in a file, you can try to validate it or verify it with the OpenSSL "verify" command as shown below: C:\Users\fyicente...
2012-07-24, 9036👍, 0💬

What Is JKS (Java KeyStore) File
What is a JKS (Java KeyStore) file? I heard that it used to provide CA certificates to Java applications. A Java Keystore file is a specially formatted file used to store cryptographic keys and certificates. A Java KeyStore file can be used to store 3 types of entries: 1. PrivateKeyEntry - This type...
2012-07-24, 5859👍, 0💬

OpenSSL Verify Operation Steps
How does the OpenSSL verify operation work? What are the steps used by OpenSSL to verify a certificate? The OpenSSL verify operation uses the same functions as the internal SSL and S/MIME verification, therefore this description applies to these verify operations too. There is one crucial difference...
2012-07-24, 4836👍, 0💬

Example of X.509 Certificate Data Structure
Can you show me an example of X.509 certificate data structure? Here is an example of X.509 Version 3 certificate data structure: Certificate: Data: Version: 3 (0x2) Serial Number: 1 (0x1) Signature Algorithm: md5WithRSAEncryption Issuer: C=ZA, ST=Western Cape, L=Cape Town, O=Thawte Consulting cc, O...
2012-07-24, 4715👍, 0💬

What Is the Structure of Certificates
What is the structure of certificates? What types of values are recorded in a certificate? The structure of an X.509 Version 3 certificate is defined in RFC 5280 - "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile". It contains the following values: ...
2012-07-24, 4229👍, 0💬

OpenSSL "s_client -connect" - Connect to HTTPS Web Site
How to connect to a HTTPS Web site using OpenSSL? I see the Web sites using the "https:\" format. If you see a Web sites using the "https:\" format, for example https://twitter.com/login/, you can try to connect the Web site using the "x509 -connect" command as shown below: C:\Users\fyicenter&gt...
2012-07-24, 16309👍, 0💬

OpenSSL "s_client -connect" - Show Server Certificate Chain
How to show all certificates in the server certificate chain using the OpenSSL "s_client -connect" command? I know the server uses multiple intermediate CA certificates. You can get all certificates in the server certificate chain if use "s_client -connect" with the "-showcerts" option as shown belo...
2012-07-24, 14179👍, 0💬

OpenSSL "s_client -connect" - View Server Certificate
How to view the server certificate using the OpenSSL "s_client -connect" command? You can get the server certificate, if use "s_client -connect" without the "-quiet" option as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; s_client -connect www.twitter.com:443 CONN...
2012-07-24, 8953👍, 0💬

OpenSSL "verify" Command Options
What can I use OpenSSL "verify" command for? What are options supported by the "verify" command? OpenSSL "verify" command is a utility to verify certificates. Here are options supported by the "verify" command: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; verify -h usage: ver...
2012-07-24, 6710👍, 0💬

Go Daddy Secure Certification Authority Certificate - FDAC6132936C45D6E2EE855F9ABAE7769968CCE7
Certificate Summary: Subject: Go Daddy Secure Certification Authority Issuer: Go Daddy Class 2 Certification Authority Expiration: 2026-11-16 01:54:37 UTC Key Identifier: FD:AC:61:32:93:6C:45:D6:E2:EE: 85:5F:9A:BA:E7:76:99:68:CC:E7Received at FYIcenter.com on: 2016-10-29 Go Daddy Secure Certificatio...
2012-07-23, 15600👍, 0💬

Yandex Passport Certificate - 74D389BE8FA210A1EF92BF8759FB1B3C774A202A
Certificate Summary: Subject: Yandex Passport Issuer: YandexExternalCA Expiration: 2014-01-17 15:15:46 UTC Key Identifier: 74:D3:89:BE:8F:A2:10:A1:EF:92: BF:87:59:FB:1B:3C:77:4A:20:2AReceived at FYIcenter.com on: 2016-10-29 Yandex Passport Certificate - 74D389BE8FA210A1EF92BF8759FB1B 3C774A202ACerti...
2012-07-23, 11125👍, 0💬

DigiCert High Assurance CA-3, www.digicert.com, DigiCert Inc, US
Certificate summary - Owner: DigiCert High Assurance CA-3, www.digicert.com, DigiCert Inc, US Issuer: DigiCert High Assurance EV Root CA, www.digicert.com, DigiCert Inc, US Expiration: Sat Apr 02 20:00:00 EDT 2022 MD5: C6:8B:99:30:C8:57:8D:41:6F:8C: 09:4E:6A:DB:0C:90Hash: Owner Hash=1445ed77, Issuer...
2012-07-23, 6070👍, 0💬

YandexExternalCA, Dld, Dyandex, Dru
Certificate summary - Owner: YandexExternalCA, Dld, Dyandex, Dru Issuer: GTE CyberTrust Global Root, "GTE CyberTrust Solutions, Inc.", GTE Corporation, US Expiration: Fri Jan 17 10:15:46 EST 2014 MD5: 9C:D4:8D:93:33:2D:1B:5D:0F:7B: 35:4C:1F:FC:78:C8Hash: Owner Hash=98ae5019, Issuer Hash=4d654d1d Inf...
2012-07-23, 5782👍, 0💬

reg.163.com, Terms of use at www.verisign.com/rpa (c)05, Tech...
Certificate summary - Owner: reg.163.com, Terms of use at www.verisign.com/rpa (c)05, Technical General Support, "Netease.com,Inc", L=Beijing, ST=Beijing, CN Issuer: VeriSign Class 3 International Server CA - G3, Terms of use at https://www.verisign.com/rpa (c)10, VeriSign Trust Network, "VeriSign, ...
2012-07-23, 5262👍, 0💬

*.wikipedia.org Certificate - BF0124B7AA2807A40665ACC34006FED658C31343
Certificate Summary: Subject: *.wikipedia.org Issuer: DigiCert High Assurance CA-3 Expiration: 2012-12-12 12:00:00 UTC Key Identifier: BF:01:24:B7:AA:28:07:A4:06:65: AC:C3:40:06:FE:D6:58:C3:13:43Received at FYIcenter.com on: 2019-01-15 *.wikipedia.org Certificate - BF0124B7AA2807A40665ACC34006FE D658...
2012-07-23, 4453👍, 0💬

OpenSSL "x509 -text" - Print Certificate Info
How to print out text information from a certificate using OpenSSL "x509" command? I want to see the subject and issuer of the certificate. Assuming you have a certificate file located at: C:\Users\fyicenter\twitter.crt ,you can print out certificate information in text format using the "x509 -text"...
2012-07-23, 20137👍, 0💬

OpenSSL "x509 -fingerprint" - Print Certificate Fingerprint
How to print out MD5 and SHA-1 fingerprints of a certificate using OpenSSL "x509" command? I need to see them and validate them with the owner of the certificate. Assuming you have a certificate file located at: C:\Users\fyicenter\twitter.crt ,you can print out certificate fingerprints using the "x5...
2012-07-23, 19030👍, 0💬

Start OpenSSL from Working Directory
How to start OpenSSL from my working directory where I have certificates stored. You can start OpenSSL from a command line window as shown in the tutorial: 1. Open a command line window. 2. Use the "cd" command to go to your working directory. 3. Run the OpenSSL program with the full path name as sh...
2012-07-23, 17436👍, 0💬

OpenSSL "s_client" Command Options
What can I use OpenSSL "s_client" command for? What are options supported by the "s_client" command? OpenSSL "s_client" command implements a generic SSL/TLS client which can establish a transparent connection to a remote server speaking SSL/TLS. It's intended for testing purposes only and provides o...
2012-07-23, 16136👍, 0💬

Install OpenSSL 0.9.8h on Windows
How to install OpenSSL on Windows? I have downloaded the "openssl-0.9.8h-1-setup.exe" on the desktop. If you have "openssl-0.9.8h-1-setup.exe" available, you can install OpenSSL 0.9.8h on Windows using these steps: 1. Double-click on "openssl-0.9.8h-1-setup.exe" to start the installation wizard. 2. ...
2012-07-23, 12150👍, 0💬

Sample X.509 Certificate File to Test OpenSSL
How can I get a X.509 certificate file to play with OpenSSL commands "x509" command? If you have no other easy way to get a sample X.509 certificate file, you can create one yourself using these steps: 1. Open "Notepad" with a black text file. 2. Copy and paste the following data into the "Notepad" ...
2012-07-23, 11312👍, 0💬

OpenSSL Command to List All Commands
How to list all commands in OpenSSL? I don't remember exactly what is the command to generate a CSR. Interestingly, there is no OpenSSL command to list all commands supported in OpenSSL. And there is no "help" command. However, if you enter "help" as a command, OpenSSL will return you an error messa...
2012-07-23, 11011👍, 0💬

List of Commands Supported in OpenSSL
What commands are supported in OpenSSL? Here is a complete list of commands supported in OpenSSL: STANDARD COMMANDS asn1parse - Parse an ASN.1 sequence. ca - Certificate Authority (CA) Management. ciphers - Cipher Suite Description Determination. cms - CMS (Cryptographic Message Syntax) utility crl ...
2012-07-23, 8458👍, 0💬

OpenSSL Command Option to List All Options
How to list all options that are supported by a specific OpenSSL command? I know the command but I don't remember the options for that command. Interestingly, there is no "-h" option to show all options supported by a specific OpenSSL command. However, if you enter "-h" as an option following a comm...
2012-07-23, 7323👍, 0💬

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