History

David Garske b185b89068 Remove execute bits on files.		2019-04-09 09:05:21 -07:00
..
rsa_buffer	Add simple RSA sign and verify examples	2018-11-15 08:20:13 +10:00
rsa_vfy_only	Small RSA verification example	2019-03-18 11:43:15 +10:00
sigtest	Remove execute bits on files.	2019-04-09 09:05:21 -07:00
Makefile	wolfSSL signature example. This example takes a file and creates a signature for it using the "wc_Signature*" wrapper functions. This example generates a new ECC key and dumps the key values, then creates a signature from a hash of the file and signs it. Then it performs a verification using the signature and public key.	2015-11-12 09:54:15 -08:00
README.md	Add simple RSA sign and verify examples	2018-11-15 08:20:13 +10:00
signature.c	Cleanups to signature example. Added return code checking and clarified the malloc values used.	2017-10-24 08:33:41 -07:00

README.md

wolfSSL Signature Example

This directory contains:

A simple example of using wolfSSL to sign and verify binary data. It supports RSA and ECC for signing and MD2, MD4, MD5, SHA, SHA256, SHA384 and SHA512.

This example creates a signature from a hash of the file and signs it using a generated key. Then it performs a verification using the signature and public key.

Compiling and Running the Example

$ make
$ ./firmware [filename] [sig] [hash]

Usage

Usage: signature : 1=ECC (def), 2=RSA, 3=RSA (w/DER Encoding) : 1=MD2, 2=MD4, 3=MD5, 4=SHA, 5=SHA256 (def), 6=SHA384, 7=SHA512, 8=MD5+SHA

------------------ UPDATE ----------------- April 11 2017:

Added ED25519 directory

ED25519 directory contains:

App "gen_key_files.c" to generate public/private keys and output keys to .der formatted files.
genkeybuffers.pl - a perl script to write the header file "test_keys.h" using the .der formatted files output from applicaton "gen_key_files.c"
App "sign_and_verify.c" to use the "test_keys.h" header file buffers for importing the public and private keys. App will then sign a msg with the private key and verify that signature using the public key

------------------ UPDATE ----------------- November 13 2018:

Added rsa_buffer directory

rsa_buffer directory contains:

App "sign.c" to generate a signature using a DER encoded private key into a buffer. Prints out a hex encoding of signature.
App "verify.c" to verify a signature using a DER encoded public key in and binary signature in buffers.
Script sign_vfy.sh builds sign, creates a signature with "sign", builds verify with message and signature generated and verifies the signature with "verify".