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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, 5372🔥, 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, 2333🔥, 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, 30696🔥, 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, 4736🔥, 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, 4457🔥, 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, 6406🔥, 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, 3204🔥, 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, 10842🔥, 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, 12623🔥, 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, 7122🔥, 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&gt;type test.cnf...
2016-10-25, 2997🔥, 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, 9307🔥, 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&gt;\loc al\OpenSSL\opensslOpenSSL&gt; x509 -in twitter.crt -pubkey -noout &gt; tw...
2016-10-17, 8022🔥, 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, 7885🔥, 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, 7259🔥, 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, 6990🔥, 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, 7995🔥, 0💬

OpenSSL "ans1parse -genconf" - Nested SEQUENCE ASN.1 Structure
How to how generate a DER with a nested SEQUENCE ASN.1 structure using the OpenSSL "ans1parse" command? You can define a nested SEQUENCE ASN.1 structure in an OpenSSL configuration file and use the "ans1parse -genconf" command to generate a DER with the structure as shown in the test below: C:\Users...
2016-10-15, 9222🔥, 0💬

OpenSSL "ans1parse -genconf" - Configuration File
How to generate a DER file with a configuration file using the OpenSSL "ans1parse" command? You can use the OpenSSL configuration file to define an ASN.1 structure and call OpenSSL "ans1parse -genconf config_file" command to generate a DER file by respecting the following rules: 1. Use "ans1parse -g...
2016-10-15, 8726🔥, 0💬

OpenSSL "ans1parse -genstr" - Single Primitive Field DER File
How to generate a DER file with a single data field using the OpenSSL "ans1parse" command? You can use the OpenSSL "ans1parse -genstr" command to generate a DER file with a single data field. You just need to specify the field type and field value separated by ":". Here are some examples of using "a...
2016-10-15, 7885🔥, 0💬

OpenSSL "ans1parse -in" - Parse DER File
How to parse a DER file using the OpenSSL "ans1parse" command? You can parse a DER file with OpenSSL "ans1parse -inform DER -in" command as shown in the test below, assuming we have some DER file created from the previous tutorial: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&gt;...
2016-10-15, 6423🔥, 0💬

OpenSSL "ans1parse" - ASN.1 INTEGER Field Type
What is ASN.1 INTEGER field type? How to specify INTEGER field type in OpenSSL "asn1parse" command? ASN.1 INTEGER field is a primitive field that can be used to store signed integers of any size. To use ASN.1 INTEGER field in OpenSSL "asn1parse" command, you need to remember the following rules: ASN...
2016-09-30, 8512🔥, 0💬

OpenSSL "ans1parse" - ASN.1 IA5STRING Field Type
What is ASN.1 IA5STRING field type? How to specify IA5STRING field type in OpenSSL "asn1parse" command? ASN.1 IA5STRING field is a primitive field that can be used to store IA5 (ISO 646) character strings. IA5 character set is generally equivalent to ASCII character set. To use ASN.1 IA5STRING field...
2016-09-30, 8178🔥, 0💬

OpenSSL "ans1parse -strparse" - Extract ASN.1 Sub Structure
How to how extra an ASN.1 child structure using the OpenSSL "ans1parse" command? You can use the OpenSSL "ans1parse -strparse offset" command to extract an ASN.1 child structure from a nested ASN.1 structure. as shown in the test below: C:\Users\fyicenter&gt;\loc al\openssl\openssl.exeOpenSSL&am...
2016-09-30, 12742🔥, 0💬

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