crypto_cipher_mode()

    
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Returns the block mode of operation of the cipher specified by "ciphername."
Syntax 
crypto_cipher_mode( ciphername )
  • where ciphername = an OpenSSL cipher identifier, such as "aes-128-cbc" or "rc2-ofb"
The output is one of the following strings:
  • stream = Stream ciphers, such as RC4
  • ecb = Electronic Code Book
  • cbc = Cipher Block Chaining
  • cfb = Cipher Feedback
  • ofb = Output Feedback
  • unknown -- An invalid ciphername was specified
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