March 2018
Beginner to intermediate
656 pages
20h 9m
English
Content preview from Mastering Blockchain - Second Edition
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ECDSA using OpenSSL
First, the private key is generated using the following commands:
$ openssl ecparam -genkey -name secp256k1 -noout -out eccprivatekey.pem $ cat eccprivatekey.pem -----BEGIN EC PRIVATE KEY----- MHQCAQEEIMVmyrnEDOs7SYxS/AbXoIwqZqJ+gND9Z2/nQyzcpaPBoAcGBSuBBAAK oUQDQgAEEKKS4E4+TATIeBX8o2J6PxKkjcoWrXPwNRo/k4Y/CZA4pXvlyTgH5LYm QbU0qUtPM7dAEzOsaoXmetqB+6cM+Q== -----END EC PRIVATE KEY-----
Next, the public key is generated from the private key:
$ openssl ec -in eccprivatekey.pem -pubout -out eccpublickey.pem read EC key writing EC key $ cat eccpublickey.pem -----BEGIN PUBLIC KEY----- MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEEKKS4E4+TATIeBX8o2J6PxKkjcoWrXPw NRo/k4Y/CZA4pXvlyTgH5LYmQbU0qUtPM7dAEzOsaoXmetqB+6cM+Q== -----END PUBLIC KEY----- ...