mmfa | command line MFA manager for OSX | Command Line Interface library
kandi X-RAY | mmfa Summary
kandi X-RAY | mmfa Summary
mmfa is a command line tool to help manage MFA secrets and generate one time MFA codes on OSX. It is heavily inspired by Bradly Feeley's ruby mmfa project.
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Top functions reviewed by kandi - BETA
- realMain is the main entry point for testing .
- GetCode returns code for the given keychain name
- pipedCommands runs the given command and returns the output .
- secretFromUser returns the secret of the user
- ListKeychainItems lists all keychain items
- addItemCommand returns the command to add items .
- getSecretCommand returns a secret command .
- secret returns the secret
- AddKeychainItem adds a keychain item to the system
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mmfa Key Features
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QUESTION
I am a little stuck attempting to write a program which 'encrypts' a string, in C. The goal of the program is to allow a user to encrypt a string by entering a cypher which will be used to swap out letters in the original string, garbling it. My original program was much more complicated than this, with logic to handle parsing user-input cyphers and to maintain case (which all worked, shockingly!). However, the absolute basic problem that I cannot solve is that the string returned by my 'encryption' function is incorrect.
I have re-written another barebones version of the function to try and debug it; this was my naive version of the program, before I started to look up information:
...ANSWER
Answered 2020-Jan-28 at 22:56You're replacing the string in-place, you check each character 26 times, and you replace it between 1 and 26 times depending on the cypher and the starting character.
For instance, this is why both 'b' and 'c' become 'm' in your example:
- 'b' is replaced with 'c'.
- The next iteration, that 'c' is replaced with 'h'.
- 5 iterations later, that 'h' is replaced with 'j'.
- 2 iterations later, that 'j' is replaced with 't'.
- 10 iterations later, that 't' is replaced with 'x'.
- 4 iterations later, that 'x' is replaced for the last time with 'm'.
Instead, just check each character up to 26 times, and replace it exactly one time:
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