This is a demo project implement in c language . The demos includes:

1. How to use openssl encode/decode base64, encrypt/decrypt by rsa/des.
2. How to do http post by libcurl.

All the resources are from Internet.

Please install libopenssl and libcurl development package first.

'make pc=1' will build binary for PC.

'make' will build binary for arm, but have not test yet.

Generate key by following commands:

1. generate private key
   $openssl genrsa -out private.pem 2048

2. view key components
   $openssl rsa -text -in private.pem

3. extract public key
   $openssl rsa -pubout -in private.pem -out public.pem

4. covert to pkcs8
   $openssl pkcs8 -in private.pem -topk8 -out private.pk8 -nocrypt