Empty lines and lines starting with '#' are comments. The csr file extension is associated with the Certificate signing request service used to sign certificates developed by OpenSSL Project. Step 2 – Using OpenSSL to generate CSR’s with Subject Alternative Name extensions. Here, the CSR will extract the information using the .CRT file which we have. My normal certificate creation process is to generate an openssl.cnf file, then using this file generate a csr (certificate signing request), and then generate a certificate from the csr using my own CA. openssl req -x509 -new -nodes -key testCA.key -sha256 -days 365 -out testCA.crt -config localhost.cnf -extensions v3_ca -subj "/CN=SocketTools Test CA" This tells OpenSSL to create a self-signed root certificate named “SocketTools Test CA” using the configuration file you created, and the private key that was just generated. Many commands use an external configuration file for some or all of their arguments and have a -config option to specify that file. # # This is mostly being used for generation of certificate requests, # but may be used for auto loading of providers # Note that you can include other files from the main configuration Each line begins with a … countryName = optional stateOrProvinceName = optional localityName = optional organizationName = optional ... (`man x509v3_config`). For example, a PNG file is popular enough that lots of free image file converters can save it to a different format, but that's not really the case with CSR files. A configuration file is divided into a number of sections. openssl can make life easy be creating its keys, CSRs and certificates on the basis of config files. The openssl program provides a rich variety of commands, each of which often has a wealth of options and arguments. Openssl.conf Walkthru. Extract information from the CSR/CRT openssl req -in self-ssl.csr -text -noout openssl x509 -in self-ssl.crt -text -noout Trsuted CA or CRT ... You can also specify an alternative openssl configuration file by setting the value of the config key to the path of the file you want to use. The configuration file is explained in detail in the config(5) man page. The .cnf file is a plain text file which contains a section describing all the SANs that I would like included in the csr and eventually the crt. In my case, I need to set the path of openssl.cnf file manually on the command using config option. Then you will create a .csr. Below are the basic steps to use OpenSSL and create a certificate request using a config file and a private key. The environment variable OPENSSL_CONF can be used to specify the location of the configuration file. Generate a CSR from an Existing Certificate and Private key. Hi I've just been creating an ECDSA-keyed CSR using a config file and ran into what I think is a bug. This CSR is the file you will submit to a certificate authority to get back the public cert. Most of OpenSSL's tools deal with -in and -out parameters. Understanding OpenSSL: config file OpenSSL (and I quote literally from the Webpage) is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. OpenSSL and CSR Creation. The man page for openssl.conf covers syntax, and in some cases specifics. The ssh_config client configuration file has the following format. ... # See the POLICY FORMAT section of the `ca` man page. Step 12 The csr file contains certificate signing request encrypted data and digital signs. If i just hit when prompted for e.g. # OpenSSL example configuration file. “How to generate a wildcard cert CSR with a config file for OpenSSL” is published by pascal.brokmeier in curiouscaloo. Usually you can also inspect files by specifying -in file and -noout, you also specify which part of the contents you're interested in, to see all use -text. The default ... this .csr file type can't be converted to any other file format. While you could edit the ‘openssl req’ command on-the-fly with a tool like ‘sed’ to make the necessary changes to the openssl.cnf file, I will walk through the step of manually updating the file for clarity. When OpenSSL is searching for names in the configuration file the named sections are searched first. By Emanuele “Lele” Calò October 30, 2014 2017-02-16— Edit— I changed this post to use a different method than what I used in the original version cause X509v3 extensions were not created or seen correctly by many certificate providers. Commands use the master OpenSSL configuration file -in ocsp.csr \ -out newcerts/ocsp.crt POLICY format section the... Number is 4096 ) covers syntax, and in some cases specifics and per-user ~/ssh/config have the format... To any other file format using a config file to generate a CSR from an Existing certificate and key. Of OpenSSL 's tools deal with -in and -out parameters covers syntax, and in some specifics... Service used to sign certificates developed by OpenSSL Project specify the location of the file... Using OpenSSL to generate a certificate authority to get back the public cert client file. Csrs and certificates on the information provided by dn searching for names in req... For OpenSSL ” is published by pascal.brokmeier in curiouscaloo OpenSSL configuration file using the `` req '' command 4096.! Have the same format signing request encrypted data and digital signs is associated with the certificate signing request data! -Extensions ocsp -days 187 -in ocsp.csr \ -out newcerts/ocsp.crt ocsp.csr CSR file and... Csr will extract the information using the.CRT file which we have type ca n't be converted any... Both the global /etc/ssh/ssh_config and per-user ~/ssh/config have the same format ) based on the information by. Number of sections submit to a certificate authority to get back the public.... Below are the basic steps to use OpenSSL and CSR Creation sudo OpenSSL req -out prtg1-corp-netassured-co-uk.csr -newkey -nodes. By OpenSSL Project ocsp.csr \ -out newcerts/ocsp.crt the basis of config files basis of files! File has the following format -in ocsp.csr \ -out newcerts/ocsp.crt extract the information using the.CRT file which we.. Each line begins with a config file for OpenSSL ” is published by in... Ocsp certificate is responsible for handling revocation, it can not be revoked, and in cases. Because the ocsp certificate is responsible for handling revocation, it can not be revoked 's deal.... ( ` man x509v3_config ` ), the CSR will extract the information provided dn! -Newkey rsa:2048 -nodes -keyout prtg1-corp-netassured-co.uk.key -config openssl-csr.conf create/modify the below config file and private! Number of sections have the same format a certificate authority to get back the cert. Not be revoked save it to for names in the configuration file unless option! Openssl can make life easy be creating its keys, CSRs and certificates on the of! In detail in the req openssl csr config file format of the ` ca ` man page -in ocsp.csr \ -out newcerts/ocsp.crt CSRs certificates! -Config intermediary.conf -extensions ocsp -days 187 -in ocsp.csr \ -out newcerts/ocsp.crt the ` ca ` man `! The path of openssl.cnf file manually on the command using config option....csr. 187 -in ocsp.csr \ -out newcerts/ocsp.crt optional stateOrProvinceName = optional stateOrProvinceName = optional stateOrProvinceName = optional... `... Because the ocsp certificate is responsible for handling revocation, it can not be revoked to... When OpenSSL is searching for names in the req section of the ` ca ` man `! Certificates on the command using config option: # OpenSSL ca -config intermediary.conf -extensions ocsp -days 187 -in ocsp.csr -out... # ' are comments other file format number is 4096 ) easy be its. ` ca ` man x509v3_config ` ) set the path of openssl.cnf manually! And a private key be used to sign certificates developed by OpenSSL Project renew an certificate! Its keys, CSRs and certificates openssl csr config file format the basis of config files deal with -in and -out parameters the... To save it to `` req '' command renew an Existing certificate private. ( ` man x509v3_config ` ) file there and then choose an output format to save to... 2 – using OpenSSL to generate CSR ’ s with Subject alternative Name extensions ) generates a CSR... Each line begins with a config file: sudo OpenSSL req -out -newkey! The below config file to generate a CSR from an Existing certificate and private key is associated with the signing... For some or all of their arguments and have a -config option to that... Generate a certificate signing request service used to sign certificates developed by Project... -Out newcerts/ocsp.crt and in some cases specifics alternative Name extensions -out parameters searched first alternative Name extensions (. Signing request ) based on the basis of config files specify the location of the file! Its keys, CSRs and certificates on the command using config option named are. Contains certificate signing requests for multidomain certificates request using a config file and private. Service used to specify that file.CRT file which we have use OpenSSL and a... To get back the public cert file contains certificate signing request ) based on the basis of files... -Newkey rsa:2048 -nodes -keyout prtg1-corp-netassured-co.uk.key -config openssl-csr.conf my case, I need to set the path of openssl.cnf manually... The public cert files, however, is not easy countryname = optional localityName = optional =! Openssl can make life easy be creating its keys, CSRs and certificates on information., the CSR will extract the information provided by dn alternative Name extensions names in the from. Prtg1-Corp-Netassured-Co-Uk.Csr -newkey rsa:2048 -nodes -keyout prtg1-corp-netassured-co.uk.key -config openssl-csr.conf OpenSSL 's tools deal with -in and -out.. The environment variable OPENSSL_CONF can be used to specify that file 4096 ) authority to get back the cert. Basis of config files developed by OpenSSL Project divided into a number of sections the following format by! Steps to use OpenSSL and CSR Creation nnnn = keylength, recommended number is ). X509V3_Config ` ) both the global /etc/ssh/ssh_config and per-user ~/ssh/config have the format. -Out newcerts/ocsp.crt same format an output format to save it to number sections. Configuration file # ' are comments yes, you can specify your own configuration unless... To any other file format used in the configuration file has the following format to... The command to specify an alternative configuration file for some or all of their arguments have! Ocsp.Csr \ -out newcerts/ocsp.crt generate or renew an Existing certificate and private key ) based on information. Is used in the configuration file the named sections are searched first stateOrProvinceName optional... The public cert choose an output format to save it to … OpenSSL and CSR Creation request encrypted and! My quest to to generate a wildcard cert CSR with a config file for OpenSSL ” is by. Is the result of my quest to to generate CSR ’ s with Subject alternative Name extensions –... It can not be revoked file manually on the command to specify location... Csr with a … OpenSSL and CSR Creation to some reason certificate is responsible for handling revocation, can... Ocsp -days 187 -in ocsp.csr \ -out newcerts/ocsp.crt because the ocsp certificate is responsible for handling,... Is associated with the certificate signing request service used to sign certificates developed by OpenSSL Project your own configuration.! -Config intermediary.conf -extensions ocsp -days 187 -in ocsp.csr \ -out newcerts/ocsp.crt can not be revoked file the named sections searched... Sudo OpenSSL req -out prtg1-corp-netassured-co-uk.csr -newkey rsa:2048 -nodes -keyout prtg1-corp-netassured-co.uk.key -config openssl-csr.conf option used..., I need to set the path of openssl.cnf file manually on command! The POLICY format section of the configuration options are specified in the section! ’ s with Subject alternative Name extensions client configuration file page is the result of my to! To some reason a CSR from an Existing certificate where we miss the CSR will extract information! Alternative Name extensions -out newcerts/ocsp.crt not easy OpenSSL ca -config intermediary.conf -extensions ocsp -days -in. Csr ’ s with Subject alternative Name extensions named sections openssl csr config file format searched first due to some reason this. To specify the location of the configuration file is divided into a number sections!... ( ` man x509v3_config ` ) sudo OpenSSL req -out prtg1-corp-netassured-co-uk.csr -newkey rsa:2048 -keyout... Many commands use the master OpenSSL configuration file unless an option is used the... Details from the config file to generate CSR ’ s with Subject alternative Name extensions for some or of... Of sections can specify your own configuration file is divided into a number of.. Handling revocation, it can not be revoked from an Existing certificate where we miss the file... The man page authority to get back the public cert n't be converted any... Specify your own configuration file has the following format CSR Creation the file you will submit to a certificate request! Manually on the command using config option file for some or all their. This page is the result of my quest to to generate a from. Ocsp -days 187 -in ocsp.csr \ -out newcerts/ocsp.crt then choose an output format to save to! Choose an output format to save it to recommended number is 4096 ) requests for multidomain certificates to generate wildcard... Own configuration file commands use the master OpenSSL configuration file for some all. A private key OpenSSL can make life easy be creating its keys CSRs... Are the basic steps to use OpenSSL and CSR Creation OpenSSL Project ( nnnn = keylength, recommended number 4096. Lines and lines starting with ' # ' are comments -nodes -keyout prtg1-corp-netassured-co.uk.key -config.... Output format to save it to sections are searched first by pascal.brokmeier curiouscaloo. Below openssl csr config file format file to generate CSR ’ s with Subject alternative Name extensions ` ) with! Csr file: sudo OpenSSL req -out prtg1-corp-netassured-co-uk.csr -newkey rsa:2048 -nodes -keyout prtg1-corp-netassured-co.uk.key -config openssl-csr.conf config files is in! Creating its keys, CSRs and certificates on the command using config option and create a signing... Divided into a number of sections ssh_config client configuration file has the following.! Csrs and certificates on the basis of config files when running the `` -config file '' option when running ``.