libelli - high level elliptic cryptography library using OpenSSL. Heavily based on Ladar Levison's ECIES module code. INSTALLATION ------------ ./buildconf ./configure make install GENERATING KEYS --------------- 1. Using online utility ----------------------- Use the scripts here: https://kjur.github.io/jsrsasign/sample/sample-ecdsa.html EC private and public keys are immediately usable. 2. Using OpenSSL ---------------- Generate private key: openssl ecparam -genkey -name secp256k1 -out myprivatekey.pem Get HEX strings for private and public keys: openssl ec -in myprivatekey.pem -text You'll get something like this: ........ Private-Key: (256 bit) priv: b7:94:70:e1:44:e7:cf:b0:01:cb:ee:cc:9f:a9:f9: 13:2e:dd:b4:ac:d2:a2:57:fb:3e:de:03:b2:8f:2e: 12:98 pub: 04:55:c2:e0:dc:b5:9d:81:96:a4:ab:8a:00:52:48: ec:a3:f3:37:38:83:02:f7:a3:f3:dd:2f:c5:aa:20: 36:a2:d6:94:6b:4e:4a:e6:38:5e:8a:f8:9e:e5:52: c3:e0:4a:3d:f5:56:41:fe:13:d8:c7:9e:bb:58:c6: 51:0e:88:0f:14 ........ Remove colons and new lines to get your private key in hex: b79470e144e7cfb001cbeecc9fa9f9132eddb4acd2a257fb3ede03b28f2e1298 Do the same to get your public key: 0455c2e0dcb59d8196a4ab8a005248eca3f337388302f7a3f3dd2fc5aa2036a2d6946b4e4ae6385e8af89ee552c3e04a3df55641fe13d8c79ebb58c6510e880f14 Note: don't try to use the keys above, they're broken intentionally, generate your own.