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Toy Digital Signatures implemented using Public Key Crypto for signing and verification, SHA1 for hashing.
digital-signatures-basic's Introduction
- Client 'A' and Server 'B' first connect.
- Client 'A' takes input a message from the user and signs the message using a signing algorithm.
- Client 'A' shares the public elements needed for verification algorithm with server 'B'.
- Then Client 'A' shares the message along with the generated signature.
- Server 'B' runs the verification algorithm and sends the status of verification to the client.
- The large primes for above algorithms are generated using the Miller-Rabin Primality Test.
- The client provides a command line interface with two different commmands:
- send - take input a message to sign and send to server
- quit - exit and close the client
- The hash function for the signing algorithm used is SHA1-Digest.
Protocol Messages during data
| Opcode |
Message |
Description |
| 10 |
PUBKEY |
public elements shared from client for the server |
| 20 |
SIGNEDMSG |
the signed message from client to server |
| 30 |
VERSTATUS |
the verification status from the server for the client |
| 40 |
EXIT |
exit status of client |
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