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Setup GPG key

note

This section is a brief from the Cryptography with OpenPGP guideline.

Install GPG​

For more details, please refer to GPG official website. Here shows one approach to install GPG with apt:

sudo apt install gnupg2

Generate GPG Key​

Attentions:

  • Name is best to keep consistent with your full name of Apache ID;
  • Email should be the Apache email;
  • Name is best to only use English to avoid garbled.

Run gpg --full-gen-key and complete the generation interactively:

gpg (GnuPG) 2.2.20; Copyright (C) 2020 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Please select what kind of key you want:
   (1) RSA and RSA (default)
   (2) DSA and Elgamal
   (3) DSA (sign only)
   (4) RSA (sign only)
  (14) Existing key from card
Your selection? 1 # input 1
RSA keys may be between 1024 and 4096 bits long.
What keysize do you want? (2048) 4096 # input 4096
Requested keysize is 4096 bits
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
Key is valid for? (0) 0 # input 0
Key does not expire at all
Is this correct? (y/N) y # input y

GnuPG needs to construct a user ID to identify your key.

Real name: Hulk Lin               # input your name
Email address: hulk@apache.org    # input your email
Comment:                          # input some annotations, optional
You selected this USER-ID:
    "Hulk <hulk@apache.org>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? O # input O
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.

# Input the security key
┌──────────────────────────────────────────────────────┐
│ Please enter this passphrase                         │
│                                                      │
│ Passphrase: _______________________________          │
│                                                      │
│       <OK>                              <Cancel>     │
└──────────────────────────────────────────────────────┘
# key generation will be done after your inputting the key with the following output
gpg: key E49B00F626B marked as ultimately trusted
gpg: revocation certificate stored as '/Users/hulk/.gnupg/openpgp-revocs.d/F77B887A4F25A9468C513E9AA3008E49B00F626B.rev'
public and secret key created and signed.

pub   rsa4096 2022-07-12 [SC]
      F77B887A4F25A9468C513E9AA3008E49B00F626B
uid           [ultimate] hulk <hulk@apache.org>
sub   rsa4096 2022-07-12 [E]

Upload your key to public GPG keyserver​

Firstly, list your key:

gpg --list-keys

The output is like:

-------------------------------
pub   rsa4096 2022-07-12 [SC]
      F77B887A4F25A9468C513E9AA3008E49B00F626B
uid           [ultimate] hulk <hulk@apache.org>
sub   rsa4096 2022-07-12 [E]

Then, send your key id to key server:

gpg --keyserver keys.openpgp.org --send-key <key-id> # e.g., F77B887A4F25A9468C513E9AA3008E49B00F626B

Among them, keys.openpgp.org is a randomly selected keyserver, you can use keyserver.ubuntu.com or any other full-featured keyserver.

Check whether the key is created successfully​

Uploading takes about one minute; after that, you can check by your email at the corresponding keyserver.

Uploading keys to the keyserver is mainly for joining a Web of Trust.

Add your GPG public key to the KEYS document​

info

SVN is required for this step.

The svn repository of the release branch is: https://dist.apache.org/repos/dist/release/opendal

Please always add the public key to KEYS in the release branch:

svn co https://dist.apache.org/repos/dist/release/opendal opendal-dist
# As this step will copy all the versions, it will take some time. If the network is broken, please use svn cleanup to delete the lock before re-execute it.
cd opendal-dist
(gpg --list-sigs YOUR_NAME@apache.org && gpg --export --armor YOUR_NAME@apache.org) >> KEYS # Append your key to the KEYS file
svn add .   # It is not needed if the KEYS document exists before.
svn ci -m "add gpg key for YOUR_NAME" # Later on, if you are asked to enter a username and password, just use your apache username and password.

Upload the GPG public key to your GitHub account​