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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, 236👍, 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, 318👍, 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, 278👍, 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, 355👍, 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, 285👍, 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, 671👍, 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, 271👍, 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, 436👍, 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, 256👍, 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, 2143👍, 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, 345👍, 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, 294👍, 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, 347👍, 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, 321👍, 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, 895👍, 0💬

OpenSSL "req -new -reqexts" - Specify CSR V3 Extensions
How to specify x.509 v3 extensions options in the configuration file for generating CSR using the OpenSSL "req" command? You can use x.509 v3 extensions options when using OpenSSL "req -new" command to generate a CSR (Certificate Signing Request). The provided x509 extensions will be included in the... 2016-10-25, 733👍, 0💬

OpenSSL "req -x509 -extensions" - Specify Self-Signed Certificate V3 Extensions
How to specify x.509 v5 extensions options in the configuration file for generating self-signed certificate using the OpenSSL "req -x509" command? You can use x.509 v3 extensions options when using OpenSSL "req -x509" command to generate a self-signed certificate. The provided x509 extensions will b... 2016-10-25, 649👍, 0💬

OpenSSL "req -new -reqexts" - Test CSR V3 Extensions
How to run OpenSSL "req -new" command to generate CSR with x.509 v3 extensions? I have req_extensions option defined in the configuration file. If you want to run OpenSSL "req -new" command to generate CSR with x.509 v3 extensions, you can follow this example: C:\Users\fyicenter>type test.cnf # u... 2016-10-25, 279👍, 0💬

OpenSSL "ans1parse" Command
Where to find tutorials on using OpenSSL "ans1parse" command? Here is a collection of tutorials on using OpenSSL "ans1parse" command compiled by FYIcenter.com team. OpenSSL "ans1parse" Command Options ASN.1 File Structure Supported by OpenSSL ASN.1 Field Types Supported by OpenSSL OpenSSL "ans1parse... 2016-10-17, 4501👍, 0💬

ASN.1 File Structure Supported by OpenSSL
What is the ASN.1 (or ASN1) file structure supported by OpenSSL? ASN.1 (Abstract Syntax Notation One) is a standard and notation that describes rules and structures for representing, encoding, transmitting, and decoding data in telecommunications and computer networking. ASN.1 defines how data of mu... 2016-10-17, 4496👍, 0💬

OpenSSL "x509 -pubout" - Export Public Key"
How to calculate the subject key identifier of a certificate uisng OpenSSL commands? I want to see if it matches the "X509v3 Subject Key Identifier" in the certificate. Accoding to the RFC5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", the ... 2016-10-17, 4405👍, 0💬

OpenSSL "x509 -pubkey" - Export Public Key"
How to export the public key out from a certificate using OpenSSL "x509" command? You can export the public key out from a certificate using OpenSSL "x509 -pubkey" command as shown below: C:\Users\fyicenter>\local\O penSSL\opensslOpenSSL> x509 -in twitter.crt -pubkey -noout > twitter_pub.ke... 2016-10-17, 4393👍, 0💬

OpenSSL "ans1parse" Command Options
What can I use OpenSSL "ans1parse" command for? What are options supported by the "ans1parse" command? OpenSSL "ans1parse" command is a diagnostic utility that can parse ASN.1 file structures. It can also be used to extract data from ASN.1 files. Here are options supported by the "ans1parse" command... 2016-10-17, 4375👍, 0💬

ASN.1 Field Types Supported by OpenSSL
What are ASN.1 field types supported by the OpenSSL "ans1parse" command? OpenSSL "ans1parse" command supports the following ASN.1 field types: BOOLEAN, BOOL - This encodes a boolean type. The value string is mandatory and should be TRUE or FALSE. Additionally TRUE, true, Y, y, YES, yes, FALSE, false... 2016-10-15, 4466👍, 0💬

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