Ahh another question, sorry. With this cipher a "salt" would make almost no sense since I already need a key? or it make sense to put a "salt" together with the string to ecnrypt?
Thanks On Mon, Jul 15, 2013 at 5:39 PM, Mariano Martinez Peck < [email protected]> wrote: > > > >> Blowfish is a 8 byte block cipher so for shorter strings I'll need to pad >> the byte array, and for longer strings I'll need to make it use cipher >> block >> chaining: >> ( >> https://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29 >> ) >> >> > Ok, I imagined something like that. Thanks for the explanation. > For my usecase, I think this is not the more critical thing since I would > use a 8 character password for sure :) > > >> >> >> If you change #decryptString:with: to: >> >> Blowfish class>>decryptString: aString with: aKey >> |decryptedData | >> decryptedData := (self new ecbDecrypt: aString asByteArray with: aKey >> asByteArray ). >> ^String fromByteArray: decryptedData asByteArray . >> >> Then this workspace code should work: >> >> | enc encryptedString dkey decrString | >> key:='mySecretKey'. >> enc:=Blowfish encryptString:'12345678' with: key. >> encryptedString := enc asByteArray asString. >> Transcript show: ' encrypted: ', encryptedString; cr. >> decrString:=Blowfish decryptString: encryptedString with: key. >> Transcript show: ' decrypted: ', decrString; cr. >> >> >> > Thanks!! That worked. Now...there is no problem with the encoding then? > Because I would need to store/retrieve the string from a file stream...so > I didn't know if I should use a TextConverter or not. > > Thanks in advance, > > > >> But with the password 'test' it will always fail because I'm not yet >> padding >> the byte array to a multiple of 8 bytes before encrypting it. >> >> >> >> Thanks for your patience >> >> >> Paul >> >> >> >> -- >> View this message in context: >> http://forum.world.st/Pharo-dev-Recommendation-for-password-encryption-tp4698499p4698789.html >> Sent from the Pharo Smalltalk Developers mailing list archive at >> Nabble.com. >> >> > > > -- > Mariano > http://marianopeck.wordpress.com > -- Mariano http://marianopeck.wordpress.com
