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OpenSSL "req -pubkey" - Extract Public Key from CSR
How to extract the public key from a CSR using OpenSSL "req -pubkey" command? If you want to extract the public key from a CSR (Certificate Signing Request), you can use the OpenSSL "req -pubkey" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; req -in my_...
2016-11-20, 1043👍, 0💬

OpenSSL "x509 -text" - View Self-Signed Certificate in Text
How to print contents of a self-signed certificate in text format using OpenSSL "x509" command? If you want to see contents of a self-signed certificate in text format, you can use the OpenSSL "x509 -text" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; x...
2016-11-20, 342👍, 0💬

OpenSSL "req -x509 -newkey" - Generate Private Key and Certificate
How to generate a new private key with a public key and generate a self-signed certificate using a single OpenSSL "req" command? If you do not have a pair of private key and public key, and you want to generate self-signed certificate to represent your personal identity or server identity, you can u...
2016-11-15, 413👍, 0💬

OpenSSL "verify" - Validate Self-Signed Certificate
How to validate a self-signed certificate using OpenSSL "verify" command? You can validate your self-signed certificate using the OpenSSL "verify" command as shown below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt; verify rsa_test.crt rsa_test.crt: C = us, ST = NY, L = New Y...
2016-11-15, 397👍, 0💬

OpenSSL "req -newkey" - Generate Private Key and CSR
How to generate a new private key with a public key and generate a CSR (Certificate Signing Request) using a single OpenSSL "req" command? If you do not have a pair of private key and public key, and you want to generate CSR (Certificate Signing Request) to represent your personal identity or server...
2016-11-12, 538👍, 0💬

OpenSSL "req -new -x509" - Generate Self-Signed Certificate
How to generate a new self-signed certificate using OpenSSL "req -new -x509" command? I have an RSA private key (including public key) ready. If you have a pair of RSA private key and public key, and you want to generate a self-signed certificate to represent your personal identity or server identit...
2016-11-12, 479👍, 0💬

OpenSSL "req -x509 -set_serial" - Certificate Serial Number
Can I sign my own CSR with a given serial number using the OpenSSL "req -x509" command? Yes, you can sign you own CSR (Certificate Sign Request) with a given serial number using the OpenSSL "req -x509 -set_serial" command as shown below. Without the "-set_serial" option, the resulting certificate wi...
2016-11-11, 2564👍, 0💬

OpenSSL "req -x509 -days" - Longer Self-Signed Certificate
Can I sign my own CSR with a longer expiration date using the OpenSSL "req -x509" command? I want to use this certificate as an internal root CA for 10 years. Yes, you can sign you own CSR (Certificate Sign Request) with a longer expiration date using the OpenSSL "req -x509 -days" command as shown b...
2016-11-11, 533👍, 0💬

OpenSSL "req -x509" - Sign My Own CSR
Can I sign my own CSR with the OpenSSL "req -x509" command? Yes, you can sign you own CSR (Certificate Sign Request) with the OpenSSL "req -x509" command as shown below. The result is a self-signed certificate. See the example below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&g...
2016-11-08, 434👍, 0💬

OpenSSL Self-Signed Certificate Components
How to identify and read each component of a self-signed certificate in OpenSSL "x509 -text" command output? OpenSSL "x509 -text" command output displays all components in a self-signed certificate with proper labels to help you identify each component. Below is a good example of the "x509 -text" co...
2016-11-08, 287👍, 0💬

OpenSSL "req -x509" - Sign CSR with Different Key
Can I sign my own CSR with a different private key using the OpenSSL "req -x509" command? Yes, you can sign you own CSR (Certificate Sign Request) with a different private key using the OpenSSL "req -x509" command as shown below. But the result is not a true self-signed certificate. The entity name ...
2016-11-05, 398👍, 0💬

OpenSSL "req -x509 -md5" - MD5 Digest for Signing
Can I using MD5 digest algorithm when generating a self-signed certificate using the OpenSSL "req -x509" command? Yes, you can use MD5 digest algorithm when generating a self-signed certificate using the OpenSSL "req -x509 -md5" command Without the "-md5" option, the default SHA256 digest algorithm ...
2016-11-05, 377👍, 0💬

OpenSSL "req -config" - Using Configuration File
Can I use my own configuration file when running "req" command? Yes, you can specify your own configuration file using the "-config file" option when running the "req" command. OpenSSL configuration file allows you to control the behavior of the "req" command with the following options: utf8 - If se...
2016-11-03, 498👍, 0💬

OpenSSL Not Validate Signature in Self-Signed Certificate
Does OpenSSL "verify" command really validate the digital signature in a self-signed certificate? No, OpenSSL "verify" command does not validate the digital signature in a self-signed certificate. In the following test, a CSR with an RSA public key was "self-signed" by the OpenSSL "req -x509" comman...
2016-11-03, 393👍, 0💬

OpenSSL "req" - distinguished_name Configuration Section
What is the distinguished_name section in the OpenSSL configuration file? The distinguished_name section in the OpenSSL configuration file is a required section of options when using OpenSSL "req -new" or "req -newkey" commands to generate a new CSR or self-signed certificate. distinguished_name sec...
2016-11-02, 1092👍, 0💬

OpenSSL "req" - "prompt=no" Mode
How to use the "prompt=no" mode of the OpenSSL "req -new" command? I want to specify DN field values directly in the configuration file. You can use "prompt=no" mode of the OpenSSL "req -new" command as shown below, if you set "prompt=no" and provide DN (Distinguished Name) field values in the confi...
2016-11-02, 374👍, 0💬

OpenSSL "req" - "prompt=yes" Mode
How to use the "prompt=yes" mode of the OpenSSL "req -new" command? I want to enter DN values at the command prompt. You can use "prompt=yes" mode of the OpenSSL "req -new" command as shown below, if you set "prompt=yes" and provide DN (Distinguished Name) field prompts in the configuration file. C:...
2016-10-30, 560👍, 0💬

OpenSSL "req" - "prompt=yes" Mode with DN Validations
How to specify DN value length limit validations when using the "prompt=yes" mode of the OpenSSL "req -new" command? If you are using "prompt=yes" mode, you can also set DN (Distinguished Name) value length limits in the configuration file. OpenSSL will perform value length validations for you. For ...
2016-10-30, 371👍, 0💬

OpenSSL "req -new" - "no objects specified in config file" Error
Why am I getting the "no objects specified in config file" error when running the OpenSSL "req -new" command? If you are getting the "no objects specified in config file" error when running the OpenSSL "req -new" command, because OpenSSL receives no value for all DN (Distinguished Name) fields. Open...
2016-10-29, 2931👍, 0💬

OpenSSL "req new -batch" - Using DN Default Values Only
How to run OpenSSL "req -new" command in batch mode? I don't OpenSSL to use DN default values only and do not prompt me. If you have DN (Distinguished Name) default values provided in the configuration file, you can run OpenSSl "req -new -batch" command to take default values only without prompt as ...
2016-10-29, 482👍, 0💬

OpenSSL "req" - "prompt=yes" Mode with DN Defaults
How to specify DN value defaults when using the "prompt=yes" mode of the OpenSSL "req -new" command? If you are using "prompt=yes" mode, you can also set DN (Distinguished Name) default values in the configuration file. OpenSSL will prompt the user for DN fields with default values. The user can pre...
2016-10-29, 429👍, 0💬

OpenSSL "req -new" - DN Fields for Personal Certificates
How to use additional DN fields to create CSR for personal certificates? You can set additional DN fields in the configuration file to allow OpenSSL "req -new" command to generate CSR for personal certificates. Additional DN fields are: emailAddress, name, surname, givenName, initials and dnQualifie...
2016-10-27, 498👍, 0💬

OpenSSL "req -new" - Repeating DN Fields
Can I repeat a DN field multiple times in the configuration file for the OpenSSL "req -new" command? Yes, you can repeat a DN (Distinguished Name) field multiple times in the configuration file. This can be done by prefix the DN field name with "0.", "1.", and so on. For example. "0.emailAddress=Ema...
2016-10-27, 483👍, 0💬

OpenSSL "req" - X509 V3 Extensions Configuration Options
What are X509 V3 extensions options in the configuration file for the OpenSSL "req" command? X509 V3 extensions options in the configuration file allows you to add extension properties into x.509 v3 certificate when you use OpenSSL commands to generate CSR and self-signed certificates. X509 V3 exten...
2016-10-26, 1424👍, 0💬

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