base64 encode/decode, encrypt/decrypt, md5, sha1

openssl_commands

#Just base64 encode a binary file:
openssl base64 -in file.bin -out file.b64

#Decode the same file
openssl base64 -d -in file.b64 -out file.bin

#Encrypt a file using triple DES in CBC mode using a prompted password:
openssl des3 -salt -in file.txt -out file.des3

#Decrypt a file using a supplied password:
openssl des3 -d -salt -in file.des3 -out file.txt -k mypassword

#Encrypt a file then base64 encode it (so it can be sent via mail for example) using Blowfish in CBC mode:
openssl bf -a -salt -in file.txt -out file.bf

#Base64 decode a file then decrypt it:
openssl bf -d -salt -a -in file.bf -out file.txt

#Decrypt some data using a supplied 40 bit RC4 key:
openssl rc4-40 -in file.rc4 -out file.txt -K 0102030405

#MD5
openssl md5 file

#SHA1
openssl sha1 file