软件借用RSA增加注册功能

openssl  rsautl -in hello.txt  -out hello.sign -inkey rsa_public_key.pem  -pubin  -sign
A private key is needed for this operation

看来只能使用私钥进行签名。

1.generate private key.
openssl genrsa  -out rsa_private_key.pem

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

2.generate public key.
openssl  rsa -in rsa_private_key.pem  -pubout  -out rsa_public_key.pem

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhjXipVKSfMPCzJQnr9I3W96w4
TS11WSKppUBSaT5zJF+sPJlWQ1i438ONj9JiQKbTw8TPtxTMRQIC7zuPCrRzlc6J
TGk82dYXcFJJZCksLggzjijrgk1Bj7CpKcPdhVH/RBoS5jRxo2yYuKf/Mav+c4N2
/s/oIlB+7RGO5hxHoQIDAQAB
-----END PUBLIC KEY-----

3.prepare the original device machine number.
cat machine_no_original.txt

00:00:00:00:00:00C8:0A:A9:2F:BE:7B00:26:C7:24:28:F4

4.use public key to encrypt the original machine no in user side.
openssl rsautl -in machine_no_original.txt -out machine_no_pubenc.txt  -inkey rsa_public_key.pem  -pubin -encrypt

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