Thanks for the post, you are helping to shed more light onto my problem.

The character string being generated is formed from a VB application, which the VB programmer has used this page as the source for the compiled code.

>the cipher text length is ALWAYS a multiple of 8

Although he acknowledges that he hasn't initially padded the blocks out to be in exact 8 bytes blocks - using the same function to reverse the data out works; I wonder if perhaps we have inherited someone else's bugs by including this code?

>you are decoding the multi-byte characters into a single byte

When encoding these characters, some single-byte characters are transformed into multi-byte characters, as per the example below. 

126    %7E    \x7E
127    %7F    \x7F
128    %u20AC    \x80
129    %81    \x81
130    %u201A    \x82
131    %u0192    \x83
132    %u201E    \x84
133    %u2026    \x85
134    %u2020    \x86
135    %u2021    \x87

[download]

In the example here, the character is transformed as a single byte character, so surely it must go back to a single (not multi) byte character?

>eg %u0160 should be something like "\x00\xBF"

I am not sure I fully understand what you have written here, is this the information I should be looking at?

>correct first few characters then the encryption is running in ECB mode and so Crypt::CBC won't help you

Yes, your statement is correct - I tried the Crypt::CBC module, but the outcoming data looked nothing like the original string, whereas the Crypt::Blowfish module was giving me the majority of it, just causing problems in the trailing area.

Richard (still mostly confused ...!)

In reply to Re: Re: Blowfish decryption problem by richard_mortimer
in thread Blowfish decryption problem by richard_mortimer

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