← All Kali Commands
🔐 Cryptography OpenSSL

Self-signed cert

OpenSSL command for self-signed cert. Copy the command below and use it in your terminal.

openssl — terminal
┌──(kali㉿kali)-[~]
└─$ openssl req -new -x509 -key key.pem -out cert.pem
Tool
OpenSSL
Category
Cryptography
Purpose
Self-signed cert

🛡️ Usage Tips

  • Always ensure you have proper authorization before using OpenSSL against any target
  • Replace target with the actual IP address or hostname you are testing
  • Run this command from a Kali Linux terminal or any system with OpenSSL installed
  • Combine with other OpenSSL commands for more comprehensive results
  • Pipe output to a file with > output.txt for later analysis

🔗 More OpenSSL Commands

openssl enc -aes-256-cbc -in plain.txt -out enc.bin
Encrypt AES-256
openssl enc -d -aes-256-cbc -in enc.bin -out plain.txt
Decrypt AES-256
openssl s_client -connect target:443
SSL connection test
openssl x509 -in cert.pem -text -noout
Read certificate
openssl genrsa -out key.pem 2048
Generate RSA key
openssl dgst -sha256 file
SHA256 hash
openssl rand -hex 32
Random 32 hex bytes
openssl rsa -in key.pem -pubout -out pub.pem
Extract public key
openssl s_client -connect target:443 -showcerts
Show cert chain
openssl verify -CAfile ca.pem cert.pem
Verify certificate
openssl pkcs12 -export -in cert.pem -inkey key.pem -out cert.p12
Create PKCS12
openssl pkcs12 -in cert.p12 -out combined.pem
Extract from PKCS12

🔐 Other Cryptography Tools

GnuPG hashID JWT Tool ssdeep
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