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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 be included in the resulting self-signed certificate.
In order to user x.509 v3 extensions options for the OpenSSL "req -x509" command, first you need write them in a named section in the configuration file. For example:
[my_req_x509_ext] basicConstraints = critical, CA:true subjectKeyIdentifier = hash authorityKeyIdentifier = keyid:always, issuer:always keyUsage = cRLSign, keyCertSign extendedKeyUsage = codeSigning, timeStamping subjectAltName = DNS:ca.fyicenter.com, email:firstname.lastname@example.org issuerAltName = issuer:copy
Then you can provided this named section [my_req_x509_ext] to the "req -x509" command in two ways:
1. Using "x509_extensions" option in the [req] section - You can set "x509_extensions=my_req_x509_ext" in the [req] section of the configuration file. For example:
[req] input_password = fyicenter x509_extensions = my_req_x509_ext ... [my_req_x509_ext] ...
2. Using "-extensions" option in the "req -x509" command - For example, "req -x509 -extensions my_req_x509_ext" command will take x.509 v3 extensions from the [my_req_x509_ext] section in the configuration file.
Note that you can use any of x.509 v3 extensions when generating self-signed certificates using the "req -x509" command. But some of them are useless in the case of self-signed certificates.
⇒ OpenSSL "req -x509 -extensions" - Test Self-Signed Certificate V3 Extensions
⇐ OpenSSL "req -new -reqexts" - Test CSR V3 Extensions
2016-10-25, 5008👍, 0💬
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