I believe that you should declare the variable "Sign" in your method "SignHash" and maybe you should not have named it "Sign" because you are using that for some other things already.
I am referring to the variable inside the "StringSink" command. So, tru to rename that into "result", or whatever, and initialize it with "string result;" before using it: "StringSink(result)". On Sat, Jul 14, 2012 at 7:08 PM, Michele <[email protected]> wrote: > Hi Ingo, > what i want is sign the RIPEMD128 hash and the sign it. I choose RSA because > it is most common and available in cryptopp, and its signature scheme use > SHA1... > > Variable string Sign is the end of StringSink, i define it in class Sign > (chek my last post) and i initialize that so: > > void SignHash() > { > DigitalSign = ""; > } > > Il giorno sabato 14 luglio 2012 18:47:49 UTC+2, Ingo Naumann ha scritto: >> >> Dear Michele, >> >> How do you initialize the string variable "Sign"? >> >> And, BTW, one comment on item 4) in your first mail. The command you >> are using in your code is for signing a message. The message gets >> hashed and then the RSA function is applied to this hash (simplified >> explanation). In your case, your RIPEMD128 hash (stored in "Digest") >> will be re-hashed with a SHA1 and then RSA'ed. If that's what you >> want, you are on the right track. >> >> Ingo > > -- > You received this message because you are subscribed to the "Crypto++ Users" > Google Group. > To unsubscribe, send an email to > [email protected]. > More information about Crypto++ and this group is available at > http://www.cryptopp.com. -- You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to [email protected]. More information about Crypto++ and this group is available at http://www.cryptopp.com.
