crypto

User's Guide

Version 4.6.4

• User's Guide
• Reference Manual
• Release Notes
• PDF
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Chapters

• Licenses
  • Top of chapter
  • OpenSSL License
  • SSLeay License
• FIPS mode
  • Top of chapter
  • Background
  • Enabling FIPS mode
  • Incompatibilities with regular builds
  • Common caveats
• Engine Load
  • Top of chapter
  • Background
  • Use Cases
• Engine Stored Keys
  • Top of chapter
  • Background
  • Use Cases
• Algorithm Details
  • Top of chapter
  • Ciphers
  • Message Authentication Codes (MACs)
  • Hash
  • Public Key Cryptography
• New and Old API
  • Top of chapter
  • Background
  • The old API
  • The new API
  • Examples of the new api
  • Retired cipher names

crypto User's Guide

Version 4.6.4

February 10, 2026