March 2024
M T W T F S S
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March 2024
M T W T F S S
 123
45678910
11121314151617
18192021222324
25262728293031

Openssl Howto for Apache

 

Display Certificate Subject name in readable format

openssl x509 -in CERTIFICATE_FILE -noout -subject -nameopt multiline,-lname,-align

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To verify a certificate chain

openssl verify CERTIFICATE_FILE

 

The file CERTIFICATE_FILE contain the intermediate certificate first and the servers certificate.

Check your Certificate using the Certificate Check tool at the bottom of the page

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To view a PKCS#12 file using openssl command

openssl pkcs12 -in CertName.p12

A PKCS#14 file contains the certificate, private key and all the intermediate certificate’s in a certificate chain and is encrypted with a password.

Alternatively use PKCS12 view Tool

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Convert PKCS#12 file to pem format using openssl command

openssl x509 -inform der -in certname.p12 -out convertedfile

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To view PKCS#7 files using openssl command

The PKCS #7 format enables the transfer of a certificate and all the certificates in its certification path from one computer to another, or from a computer to removable media. PKCS #7 files typically use the .p7b extension, and are compatible with the ITU-T X.509 standard

openssl pkcs7 -in filename_containing_cert -print_certs -out cert.pem

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Convert a PKCS#7 file from PEM to DER using openssl command

command: openssl pkcs7 -in filename_containing_cert -outform DER -out file.der

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Convert a DER formatted certificate to PEM using openssl command

openssl x509 -inform der -in certificate_file -outform pem -out newfilename.pem

To view the Der formatted file (*.crt, *.cer, *.der)
openssl x509 -inform der -in certificate_file -text Top

Display Certificate Thumbprint

To display certificate thumbprint using open source software namely openssl

1. openssl x509 -in CERTIFICATE_FILE -noout -sha1 -fingerprint
2. openssl x509 -in CERTIFICATE_FILE -noout -fingerprint

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