Goals

  • Create a random private key(of 64 hexadecimal characters | 256 bits | 32 bytes)

  • Derive a public key from the above private key(of 128 hexadecimal characters | 512 bits | 64 bytes)

  • Derive an address from the above derived public key(of 40 hexadecimal characters | 160 bits |20 bytes)

Generate Private Key 

openssl ecparam -name secp256k1 -genkey -noout
Example Output 
-----BEGIN EC PRIVATE KEY-----
MHQCAQEEIOV/tf2mBMYtygiqAoMLk1weZj2uXmGCagGxALeZnHQWoAcGBSuBBAAK
oUQDQgAEBKrAcZsycPPgJf+uzTF+/xZ35v8og4+P7fvHJ81jCXpNyfyfrg8e1goN
Yamwfd8MEgS3u/qJOSSEsoc+saTDVg==
-----END EC PRIVATE KEY-----

Generate a random Private Key & Derive a Public Key 

openssl ecparam -name secp256k1 -genkey -noout | openssl ec -text -noout > Key

Display Key File 

cat Key
Example Output
Private-Key: (256 bit)
priv:
    00:a8:a6:02:44:37:16:3f:1b:20:1d:61:8c:45:5c:
    33:88:09:97:0c:38:59:19:c9:82:1c:10:9d:30:36:
    29:e8:53
pub: 
    04:17:2d:96:31:e3:18:46:9a:80:6c:7f:b5:a3:d1:
    27:d8:3f:ac:ca:f9:f5:18:69:65:c7:82:dc:b0:4b:
    51:1e:56:7a:67:f9:33:4a:a3:72:fc:3b:55:78:d2:
    2d:1a:3f:30:5b:bd:38:69:66:14:41:16:8d:b7:12:
    34:19:2c:4f:88
ASN1 OID: secp256k1

Extract the Private Key, remove leading zero, and save to a file 'priv' 

cat Key | grep priv -A 3 | tail -n +2 | tr -d '\n[:space:]:' | sed 's/^00//' > priv

cat priv
Example Output
3-00a8a6024437163f1b201d618c455c4-338809970c385919c9821c109d30365-29e853

Extract the Public Key, remove EC prefix 0x04, and save to a file 'pub' 

cat Key | grep pub -A 5 | tail -n +2 |tr -d '\n[:space:]:' | sed 's/^04//' > pub
Example Output
7-04172d9631e318469a806c7fb5a3d18-27d83faccaf9f5186965c782dcb04b9- 
511e567a67f9334aa372fc3b5578d210-2d1a3f305bbd3869661441168db71211-34192c4f88

Generate the hash, and save to a file 'address' 

cat pub | keccak-256sum -x -l | tr -d ' -' | tail -c 41 > address

cat address
Example Output
a95fdeec5607856dd71b3c466af62a6e895a8a6aa

Key Outputs 

1. 3-00a8a6024437163f1b201d618c455c4-338809970c385919c9821c109d30365-29e853
2. 7-04172d9631e318469a806c7fb5a3d18-27d83faccaf9f5186965c782dcb04b9- 
511e567a67f9334aa372fc3b5578d210-2d1a3f305bbd3869661441168db71211-34192c4f88
3. a95fdeec5607856dd71b3c466af62a6e895a8a6aa

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