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I'm migrating my Diffie-Hellman (DH) implementation from OpenSSL 1.1 to OpenSSL 3.0. Previously, I used APIs like DH_set0_pqg, but these are now deprecated. I am switching to the EVP_PKEY-DH interface ...
PKRG's user avatar
  • 637
1 vote
0 answers
146 views

I'm using OpenSSL 3.0 EVP_PKEY in C to perform Diffie-Hellman key exchange. I generate Alice's and Bob's key pairs. I extract Bob's public key as a BIGNUM and try to reconstruct an EVP_PKEY for Bob's ...
PKRG's user avatar
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1 vote
0 answers
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I am learning to use the openssl/cryptolib. Am working to build a simple p2p chat room with encryption. My intent is to use a Diffie-Hellman key exchange scheme. As I understand it, it is powered by ...
Hackerman's user avatar
  • 141
3 votes
0 answers
102 views

I am learning to use the openssl/cryptolib. Am working to build a simple p2p chat room with encryption. My intent is to use a Diffie-Hellman key exchange scheme. As I understand it, it is powered by ...
Hackerman's user avatar
  • 141
0 votes
1 answer
134 views

I have a problem verifying key exchange with the server using Elliptic Curve Diffie Hellman. The key I sent doesn't work for some reason, the server can not use it or recognize it, and I don't know ...
Yupi's user avatar
  • 4,468
2 votes
1 answer
62 views

I'm looking into implementing OTR (off-the-record) protocol into my de-centralised messaging app (written in Scala with akka and akka-http). I was originally attempting to use SSL, but it seems ...
Kris Rice's user avatar
  • 923
0 votes
0 answers
81 views

I am trying to get Diffie Hellman Key Exchange working between my iOS (swift) app and my ASP.NET 8 Core Web Server but with everything I've tried so far, the shared secrets derived on each platform ...
John Rams's user avatar
  • 13
0 votes
1 answer
125 views

I am getting the exception below while trying to use SFTP client to send a file. It used to work earlier but I am getting this exception since I migrated to .NET 8. Negotiation failed. Unsupported ...
Madhur Maurya's user avatar
  • 1,070
0 votes
0 answers
379 views

Most of the API that EC_KEY* functions like EC_KEY_get0_public_key have been deprecated in OpenSSL 3.0, so as far as I know there's no way but to use the EVP interface. I want to export the public key ...
vibhav950's user avatar
  • 57
1 vote
0 answers
112 views

I'm writing a simple ssh client in C using the OpenSSL library to handle the Diffie-Hellman operations (big numbers, hashing, computing the shared key, server verification, etc.) I'm running a ssh ...
Ruben Boero's user avatar
  • 41
1 vote
0 answers
208 views

EDIT: I realized the EVP_PKEY_print_private function is actually the same as the RFC p, they just have differing endian-ness. I would still appreciate critiques of my code, and pointers to helpful ...
Ruben Boero's user avatar
  • 41
0 votes
0 answers
479 views

I'm Trying to implement a server-client application in C that uses OpenSSL's Diffie-Hellman key exchange for secure communication.However, during compliation, I'm encountering the following error: ...
VIJAY KUMAR's user avatar
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0 votes
0 answers
113 views

I'm trying to recreate the Bob and Alice Diffie-Hellman Key Exchange, since I'm doing my first steps in cryptography and cyber security. The goal is to implement a non-interactive version of this ...
Rohac's user avatar
  • 31
0 votes
1 answer
243 views

I'm trying to implement PACE PIN authentication with a generic mapping using elliptic curves. Here is the beginning of my method, I have a 6984 error here : • Send PKPCD,map and Receive PKPICC,map ...
Bouls's user avatar
  • 39
-1 votes
1 answer
780 views

I have a smart card reader and a smart card. I need to perform a Diffie-Hellman key exchange between the chip and the reader to get the shared secret, and then generate a new DHMappedGenerator in C#. ...
Bouls's user avatar
  • 39

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