А Вам, уважаемый, не помешало бы поинтересоваться возможностями этой библиотеки.

$ openssl -
openssl:Error: '-' is an invalid command.

<…>      

Message Digest commands (see the `dgst' command for more details)
md4               md5               mdc2              rmd160            
sha               sha1              

Cipher commands (see the `enc' command for more details)
aes-128-cbc       aes-128-ecb       aes-192-cbc       aes-192-ecb      
aes-256-cbc       aes-256-ecb       base64            bf                
bf-cbc            bf-cfb            bf-ecb            bf-ofb            
camellia-128-cbc  camellia-128-ecb  camellia-192-cbc  camellia-192-ecb  
camellia-256-cbc  camellia-256-ecb  cast              cast-cbc          
cast5-cbc         cast5-cfb         cast5-ecb         cast5-ofb        
des               des-cbc           des-cfb           des-ecb          
des-ede           des-ede-cbc       des-ede-cfb       des-ede-ofb      
des-ede3          des-ede3-cbc      des-ede3-cfb      des-ede3-ofb      
des-ofb           des3              desx              idea              
idea-cbc          idea-cfb          idea-ecb          idea-ofb          
rc2               rc2-40-cbc        rc2-64-cbc        rc2-cbc          
rc2-cfb           rc2-ecb           rc2-ofb           rc4              
rc4-40            rc5               rc5-cbc           rc5-cfb          
rc5-ecb           rc5-ofb           seed              seed-cbc          
seed-cfb          seed-ecb          seed-ofb          zlib