Certificate Management

Legal Warning

Specifications, details, statements, and information in this manual are subject to change without any notice. All the information provided, procedures shared, or statements listed below are for Tegsoft technical experts only. Using this manual without Tegsoft Technical qualification should be avoided. Tegsoft has no obligation over the result of the application on any use. Some statements may not be suitable for use; avoiding without technical qualification may be crucial. Users must take full responsibility for performing any steps part of this manual. Users who are not aware of the technical terms and operations described here; should be aware that this document may not be suitable for their usage.

Changes to This Document

Preface

This document explains how to manage and convert certificates. The preface for Certificate Management contains the following sections:

• Certificate Verification
• Converting Files
• Common Errors

Obtaining Documentation

Tegsoft documentation and additional literature are available on Tegsoft Knowledge Base. This section explains the product documentation resources that Tegsoft offers.

Tegsoft Knowledge Base

You can access the most current Tegsoft documentation at this URL:

https://docs.tegsoft.com/docs

Prerequisites

• You must have basic knowledge of networking
• You must have basic knowledge of SSH connection
• You must have basic skills in Linux Command Line Interface

Certificate Verification

Certificate 

openssl verify -verbose certificate.crt

certificate.crt: OU = Domain Control Validated, OU = Hosted by Doruk Bilisim Teknolojileri Ltd. Sti, OU = PositiveSSL Wildcard, CN = *.rumeli.edu.tr

error 20 at 0 depth lookup:unable to get local issuer certificate

Key Verification

openssl rsa -noout -modulus -in certificate.key | openssl md5

Key - Certificate Matching

openssl pkey -in certificate.key -pubout -outform pem | sha256sum
openssl x509 -in certificate.crt -pubkey -noout -outform pem | sha256sum
openssl x509 -in certificate.crt -text -noout

 Certificate:

   Data:

        Version: 3 (0x2)

        Serial Number:

            a1:e0:4c:0f:d3:fa:2e:ae:e6:da:eb:61:66:76:02:f6

    Signature Algorithm: sha256WithRSAEncryption

        Issuer: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA

        Validity

            Not Before: Feb 14 00:00:00 2018 GMT

            Not After : Feb 14 23:59:59 2019 GMT

        Subject: OU=Domain Control Validated, OU=Hosted by Doruk Bilişim Teknolojileri Ltd. Sti, OU=PositiveSSL Wildcard, CN=*.rumeli.edu.tr

        Subject Public Key Info:

            Public Key Algorithm: rsaEncryption

                Public-Key: (2048 bit)

                Modulus:

                    00:a8:32:f8:50:5d:6e:ea:08:3c:27:a8:32:ed:bb:

                    86:81:f6:86:5b:cc:4f:4d:21:c4:04:67:cd:46:8a:

                    ff:76:d2:9f:b6:da:16:af:be:e3:89:a4:54:9c:ef:

                    97:a8:03:17:c9:1f:94:fe:a3:37:03:ff:b9:95:f0:

                    fd:1c:d8:77:a7:70:18:01:dd:38:1b:29:cb:b1:2c:

                    7d:5b:82:81:ae:85:33:99:67:c5:ac:9b:53:eb:fe:

                    9d:ea:ef:3f:bd:35:42:dc:5c:d4:56:ee:c9:8c:f5:

                    43:b0:89:e6:af:5f:52:83:22:54:de:86:5d:0a:d5:

                    e1:55:0b:e3:b8:01:9d:30:9e:ac:69:74:d4:e5:9b:

                    cc:a9:d1:5e:67:b6:da:91:41:e5:a3:59:29:4d:e6:

                    bf:b2:05:9a:2b:12:7c:c3:30:ed:e4:29:2d:10:72:

                    01:88:7a:99:c4:9d:fc:e3:92:b7:4c:c1:34:13:1c:

                    1d:43:47:73:87:d5:f9:77:bf:55:cb:60:65:5c:5e:

                    46:ab:5b:b2:bd:71:56:6c:0c:c6:0d:6e:46:de:bb:

                    9e:44:57:1a:72:57:e4:1a:90:5b:35:eb:40:3a:a0:

                    bd:85:18:f9:6b:71:1a:43:45:b0:29:e8:cb:b3:c2:

                    17:9e:17:00:c0:66:f8:8e:c0:91:b4:2c:c1:52:c5:

                    92:69

                Exponent: 65537 (0x10001)

        X509v3 extensions:

            X509v3 Authority Key Identifier: 

                keyid:90:AF:6A:3A:94:5A:0B:D8:90:EA:12:56:73:DF:43:B4:3A:28:DA:E7

            X509v3 Subject Key Identifier: 

                18:7E:41:D5:6B:95:26:76:EC:EB:5A:7C:0D:59:49:9F:A7:AE:7C:23

            X509v3 Key Usage: critical

                Digital Signature, Key Encipherment

            X509v3 Basic Constraints: critical

                CA:FALSE

            X509v3 Extended Key Usage: 

                TLS Web Server Authentication, TLS Web Client Authentication

            X509v3 Certificate Policies: 

                Policy: 1.3.6.1.4.1.6449.1.2.2.7

                  CPS: https://secure.comodo.com/CPS

                Policy: 2.23.140.1.2.1

            X509v3 CRL Distribution Points: 

                Full Name:

                  URI:http://crl.comodoca.com/COMODORSADomainValidationSecureServerCA.crl

            Authority Information Access: 

                CA Issuers - URI:http://crt.comodoca.com/COMODORSADomainValidationSecureServerCA.crt

                OCSP - URI:http://ocsp.comodoca.com

            X509v3 Subject Alternative Name: 

                DNS:*.rumeli.edu.tr, DNS:rumeli.edu.tr

    Signature Algorithm: sha256WithRSAEncryption

         04:57:6f:bf:3d:8d:ff:89:4b:98:0c:94:6d:9e:2e:3c:e1:6a:

         54:48:3c:1a:fd:11:14:d9:c9:bb:8c:09:29:f0:4d:a6:f8:15:

         90:31:1a:94:ed:ea:af:d5:df:b3:36:d7:8a:25:46:11:60:02:

         13:ae:54:73:3b:be:3f:0a:96:a6:80:44:72:17:3b:63:9e:5e:

         47:89:7f:32:6e:a6:60:eb:3c:75:e9:6c:a8:66:5c:34:57:3a:

         11:4a:15:f5:68:94:7e:e5:ee:b5:b5:3b:fe:59:7a:81:41:6d:

         7e:38:9b:a1:0f:35:5a:cf:07:2d:ff:bc:2c:02:e0:db:b6:be:

         31:ac:47:e0:9e:b8:de:15:63:15:d5:d1:ec:43:c0:91:23:aa:

         a7:19:cf:a2:ac:a2:8f:22:77:5a:68:e0:f9:83:c4:72:dc:4f:

         12:47:ab:44:e7:dc:41:22:cf:1a:59:6f:83:98:56:35:bf:58:

         cd:eb:ec:92:03:ce:35:65:f3:03:dd:b0:29:b4:6b:25:11:b1:

         0b:e0:6b:e0:9f:f2:41:9f:f0:45:c5:b8:76:db:12:a2:a2:a1:

         6d:75:d7:89:77:78:fc:ce:d8:24:10:f3:a2:a9:6c:b9:d3:46:

         ea:b6:f2:f0:97:7c:94:1b:36:18:74:68:c5:2e:6d:4b:91:91:

         92:47:a8:d5

Converting Files

Converting PFX to KEY File

Two steps;

openssl pkcs12 -in yourfile.pfx -clcerts -nokeys -out certificate.crt

Enter Import Password:ENTER_PASSWORD

MAC verified OK

openssl pkcs12 -in yourfile.pfx -nocerts -out certificate-tmp.key

Enter Import Password:ENTER_PASSWORD

MAC verified OK

Enter PEM pass phrase:tegsoft123

Verifying - Enter PEM pass phrase:tegsoft123

openssl rsa -in certificate-tmp.key -out certificate.key

Enter pass phrase for certificate-tmp.key:tegsoft123

writing RSA key

Converting CRT to PFX File

openssl pkcs12 -export -out certificate.pfx -inkey certificate.key -in certificate.crt -certfile bundle.crt

Converting KEY to 8 Bit KEY File

openssl pkcs8 -topk8 -inform PEM -outform DER -in certificate.key -nocrypt > certificate8.key

Converting CER to PEM File

openssl x509 -inform der -in certificate.cer -out certificate.pem

Converting CRT to PEM File

openssl x509 -in certificate.crt -out certificate.pem -outform PEM

Common Errors

Overriding default certificate files
When using /certificates folder and certificate.XXX files Tegsoft will override those files when booting. It is important to run the below command to disable Tegsoft certificate overriding.

echo 1 > /root/custom_certificates