Re: [cryptopp-users] Recovering public key from hash and signature

2021-09-22 Thread Uri Blumenthal
It should be obvious, but you cannot verify (as in "technically impossible") a digital signature without having public key of the signer. It is not recommended to re-invent the basic digital signature algorithms or implementations. > On Sep 22, 2021, at 15:30, Luca Bonaldo wrote: > > Hi Jef

Re: [cryptopp-users] Recovering public key from hash and signature

2021-09-22 Thread Luca Bonaldo
Hi Jeff, I apologize for my insistance but I do really need support. I'm writing this code for an important project and I cannot wrap my head around a solution. If I'm not asking for too much, could you please guide me to the correct wiki's pages or help me writing a pseudo code to achieve my g

Re: [cryptopp-users] Recovering public key from hash and signature

2021-09-20 Thread Luca Bonaldo
Hi Jeff, thank you for the kind answer. I've already looked at more or less every page in the wiki. Maybe I've missed the ones you are reffering to. Could you be so kind to link me those, please? Again, thank you so much for the support and it's very important for me to recover the public key fr

Re: [cryptopp-users] Recovering public key from hash and signature

2021-09-19 Thread Jeffrey Walton
On Sun, Sep 19, 2021 at 5:09 AM Luca Bonaldo wrote: > > Hi, I was writing a library to generate a pair of keys, use the private key > to sign a hash and finally verify the signature only knowing the hash and the > signature. > > I'm having quite a hard time doing that, in fact I searched so much

[cryptopp-users] Recovering public key from hash and signature

2021-09-19 Thread Luca Bonaldo
Hi, I was writing a library to generate a pair of keys, use the private key to sign a hash and finally verify the signature only knowing the hash and the signature. I'm having quite a hard time doing that, in fact I searched so much just to find myself at the start point. I'll leave my code her