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OpenSSL

Certificate and Key Formats​

  • DER
  • PEM
  • PKCS#7
  • PKCS#8
  • PKCS#12

Commands​

openssl version -a                          # Display version of OpenSSL


openssl ciphers -v 'ALL:eNULL'              # Verbose listing of all OpenSSL ciphers including NULL ciphers.
openssl ciphers -v 'ALL:!aNULL'             # List all ciphers except ones with no encryption (eNULL) or no authentication (aNULL):

Tools​

Testing TLS/SSL encryption
TLS Ciphersuite Search

Abbreviations​

  • PEM: Privacy Enhanced Mail
  • PKCS: Public-Key Cryptography Standards
  • SHA: Secure Hash Algorithm
  • SSL: Secure Socket Layer
  • TLS: Transport Layer Security
  • CSR: Certificate Signing Request
  • DER: Distinguished Encoding Rules

Resources​

OpenSSL Introduction.