$ sudo apt install age
$ age --version
1.1.1
$ dpkg-query -W age
age     1.1.1-1+b3
$ age
Usage:
    age [--encrypt] (-r RECIPIENT | -R PATH)... [--armor] [-o OUTPUT] [INPUT]
    age [--encrypt] --passphrase [--armor] [-o OUTPUT] [INPUT]
    age --decrypt [-i PATH]... [-o OUTPUT] [INPUT]

Options:
    -e, --encrypt               Encrypt the input to the output. Default if omitted.
    -d, --decrypt               Decrypt the input to the output.
    -o, --output OUTPUT         Write the result to the file at path OUTPUT.
    -a, --armor                 Encrypt to a PEM encoded format.
    -p, --passphrase            Encrypt with a passphrase.
    -r, --recipient RECIPIENT   Encrypt to the specified RECIPIENT. Can be repeated.
    -R, --recipients-file PATH  Encrypt to recipients listed at PATH. Can be repeated.
    -i, --identity PATH         Use the identity file at PATH. Can be repeated.

INPUT defaults to standard input, and OUTPUT defaults to standard output.
If OUTPUT exists, it will be overwritten.

RECIPIENT can be an age public key generated by age-keygen ("age1...")
or an SSH public key ("ssh-ed25519 AAAA...", "ssh-rsa AAAA...").

Recipient files contain one or more recipients, one per line. Empty lines
and lines starting with "#" are ignored as comments. "-" may be used to
read recipients from standard input.

Identity files contain one or more secret keys ("AGE-SECRET-KEY-1..."),
one per line, or an SSH key. Empty lines and lines starting with "#" are
ignored as comments. Passphrase encrypted age files can be used as
identity files. Multiple key files can be provided, and any unused ones
will be ignored. "-" may be used to read identities from standard input.

When --encrypt is specified explicitly, -i can also be used to encrypt to an
identity file symmetrically, instead or in addition to normal recipients.

Example:
    $ age-keygen -o key.txt
    Public key: age1ql3z7hjy54pw3hyww5ayyfg7zqgvc7w3j2elw8zmrj2kg5sfn9aqmcac8p
    $ tar cvz ~/data | age -r age1ql3z7hjy54pw3hyww5ayyfg7zqgvc7w3j2elw8zmrj2kg5sfn9aqmcac8p > data.tar.gz.age
    $ age --decrypt -i key.txt -o data.tar.gz data.tar.gz.age

$ age-keygen -o key.txt
Public key: age1asle7pc9uj5n3fxamxst286ejh24yv5nut0qtedmadsxdm38egvs6ez9jr
$ cat key.txt
# created: 2024-03-30T04:44:49+09:00
# public key: age1asle7pc9uj5n3fxamxst286ejh24yv5nut0qtedmadsxdm38egvs6ez9jr
AGE-SECRET-KEY-1VZVZ0VXNSP7D3XN6X545MT7EX89S2Z7F68G6CG0RZ9WKMGN0CW4STSVM26
$ age-keygen -o key2.txt
Public key: age1vz7kedcgzvzk4n4ke50wdxthll9g3muhgwlv3vz37g926frzjvvst777qe

$ echo 'plain' > data
$ age -o data.age -r age1asle7pc9uj5n3fxamxst286ejh24yv5nut0qtedmadsxdm38egvs6ez9jr data (1)
$ age --decrypt -i key.txt -o - data.age (2)
plain
$ age -o data.age -r age1asle7pc9uj5n3fxamxst286ejh24yv5nut0qtedmadsxdm38egvs6ez9jr \
    -r age1vz7kedcgzvzk4n4ke50wdxthll9g3muhgwlv3vz37g926frzjvvst777qe data (3)
$ age --decrypt -i key.txt -o - data.age (4)
plain
$ age --decrypt -i key2.txt -o - data.age (5)
plain

$ age --passphrase -o data.age data (1)
Enter passphrase (leave empty to autogenerate a secure one):
Confirm passphrase:
$ age --passphrase -o data.age data (2)
Enter passphrase (leave empty to autogenerate a secure one):
age: using autogenerated passphrase "resist-host-rabbit-rapid-choose-slender-legal-ramp-forward-scare"
$ age --passphrase --armor data (3)
age: using autogenerated passphrase "what-open-rifle-junior-meadow-grass-hurdle-cigar-hybrid-slide"
-----BEGIN AGE ENCRYPTED FILE-----
YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNjcnlwdCBxcGxLRjNySGliS3ZyUmUz
Tm5MMnVRIDE4ClQzVUhlUmJlSGQrSmdUcU1xaEo0ZkFUcGpLWGZpUnBEbjNPbDMy
WDk4ZHcKLS0tIFRic2twRVFOVkJ3a2Y3UWZ3WEdxcG5iSi9qWk5TU1UydWllVG1G
NlBmMkkKh1ok+t0EGZrBXEQujdb6JQLcIGyZXcnvJrAetajKdVImFUCHXu0=
-----END AGE ENCRYPTED FILE-----

$ age --decrypt -o - ./data.age
Enter passphrase:
plain
$ echo '-----BEGIN AGE ENCRYPTED FILE-----
YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNjcnlwdCBxcGxLRjNySGliS3ZyUmUz
Tm5MMnVRIDE4ClQzVUhlUmJlSGQrSmdUcU1xaEo0ZkFUcGpLWGZpUnBEbjNPbDMy
WDk4ZHcKLS0tIFRic2twRVFOVkJ3a2Y3UWZ3WEdxcG5iSi9qWk5TU1UydWllVG1G
NlBmMkkKh1ok+t0EGZrBXEQujdb6JQLcIGyZXcnvJrAetajKdVImFUCHXu0=
-----END AGE ENCRYPTED FILE-----' | age --decrypt -o -
Enter passphrase:
plain

$ age --armor -R ~/.ssh/id_ed25519.pub data
-----BEGIN AGE ENCRYPTED FILE-----
YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNzaC1lZDI1NTE5IGVSY0tCZyBZRUJD
NUZ6OWpQWDlzK2JKbmszaVp1ak9TQ0NZWkxoM0JuRlhtTm1hNVdFCjZqV0RlRldI
cjY4TDJJR1hRckxNUkw2QmoreGVoRURzRGhRYllZUjBXck0KLS0tIEJBaFVXa3J0
RHFobkVzUnRLaDZaUDVHdnpTbklHYmozQThKKzVKT3haUkEKaRkef04BHGL2sDPy
B9hl8CCpgJ57fOZtLBG8tPruAz5uASNhJss=
-----END AGE ENCRYPTED FILE-----
$ echo '-----BEGIN AGE ENCRYPTED FILE-----
YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNzaC1lZDI1NTE5IGVSY0tCZyBZRUJD
NUZ6OWpQWDlzK2JKbmszaVp1ak9TQ0NZWkxoM0JuRlhtTm1hNVdFCjZqV0RlRldI
cjY4TDJJR1hRckxNUkw2QmoreGVoRURzRGhRYllZUjBXck0KLS0tIEJBaFVXa3J0
RHFobkVzUnRLaDZaUDVHdnpTbklHYmozQThKKzVKT3haUkEKaRkef04BHGL2sDPy
B9hl8CCpgJ57fOZtLBG8tPruAz5uASNhJss=
-----END AGE ENCRYPTED FILE-----' | age -d -i ~/.ssh/id_ed25519
plain

$ echo 'plain' | age --armor -R ./rsa1024.pub
age: warning: recipients file "./rsa1024.pub": ignoring unsupported SSH key of type "ssh-rsa" at line 1
age: error: failed to parse recipient file "./rsa1024.pub": "./rsa1024.pub": no recipients found
age: report unexpected or unhelpful errors at https://filippo.io/age/report
$ echo 'plain' | age --armor -R ./rsa2048.pub
-----BEGIN AGE ENCRYPTED FILE-----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$ echo 'plain' | age --armor -R ./rsa3072.pub
-----BEGIN AGE ENCRYPTED FILE-----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-----END AGE ENCRYPTED FILE-----
$ echo 'plain' | age --armor -R ./rsa4096.pub
-----BEGIN AGE ENCRYPTED FILE-----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-----END AGE ENCRYPTED FILE-----

$ echo 'plain' | age --armor -R ./rsa2048.pub -R ./rsa3072.pub -R ./rsa4096.pub -R ~/.ssh/id_ed25519.pub
-----BEGIN AGE ENCRYPTED FILE-----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-----END AGE ENCRYPTED FILE-----

$ wget https://github.com/FiloSottile.keys
$ age -a -R ./FiloSottile.keys data
age: warning: recipients file "./FiloSottile.keys": ignoring unsupported SSH key of type "ecdsa-sha2-nistp256" at line 1
age: error: failed to parse recipient file "./FiloSottile.keys": "./FiloSottile.keys": no recipients found
age: report unexpected or unhelpful errors at https://filippo.io/age/report
$ dd if=FiloSottile.keys bs=20 count=1 2>/dev/null; echo
ecdsa-sha2-nistp256

$ dpkg-query -W age openssh-client openssl
age     1.1.1-1+b3
openssh-client  1:9.2p1-2+deb12u2
openssl 3.0.11-1~deb12u2+rpt1
$ lsb_release -a
No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 12 (bookworm)
Release:        12
Codename:       bookworm
$ arch
armv7l
$ cat /proc/device-tree/model ;echo
Raspberry Pi 3 Model B Rev 1.2

$ umask 277; no=0; tmp=`mktemp -d -p ~/tmp/`; chmod 700 ${tmp}; while true;do no=$(($no + 1)); ssh-keygen -t ed25519 -f ${tmp}/${no} -N '' -C '' > /dev/null; grep -i -E m[a@]t[o0] ${tmp}/${no}.pub && echo ${tmp}/${no} && break; done
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOt6L8+9eF3T8o/M4BnDVZ5F7SVdPmat0hlM8s/8zV/r
/home/matoken/tmp/tmp.rGb5eSpEaJ/26016

$ git clone https://github.com/ionathanch/ssh-keygen-ed25519-vanity
$ cd ssh-keygen-ed25519-vanity
$ make

$ ./vanity mato
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEHmibZNyKuT/GO9rloS8qmatoFOZ4N7fJcRSOPCwsky
-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZWQyNTUxOQAAACBB5om2Tcirk/xjva5aEvKpmraBTmeDe3yXEUjjwsLJMgAAAIjwyswa8MrMGgAAAAtzc2gtZWQyNTUxOQAAACBB5om2Tcirk/xjva5aEvKpmraBTmeDe3yXEUjjwsLJMgA
AAEBro42f/ycDTNvMw3JHIGD5dzg+VVgshQw+RWIhN/I2WEHmibZNyKuT/GO9rloS8qmatoFOZ4N7fJcRSOPCwskyAAAAAAECAwQF
-----END OPENSSH PRIVATE KEY-----

$ time parallel -n 0 ./vanity vanity -- 1 2 3 4

$ go install github.com/pcarrier/vanity-keygen@latest
$ vanity-keygen -h
Usage of vanity-keygen:
  -cpuprofile string
        write cpu profile to file
  -threads int
        number of threads to run (default 4)

$ time vanity-keygen -threads `nproc` [mM][aA@][tT][oO0]
2023/04/05 08:30:06 Looking for a public key matching [mM][aA@][tT][oO0]
2023/04/05 08:30:06 Public key:
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA2rzJZSoqwrVF/Pf2FzKgfL/eMATOI/V7bjdmqkGV5B
2023/04/05 08:30:06 Private key:
-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtz
c2gtZWQyNTUxOQAAACANq8yWUqKsK1Rfz39hcyoHy/3jAEziP1e243ZqpBleQQAA
AIiaywRCmssEQgAAAAtzc2gtZWQyNTUxOQAAACANq8yWUqKsK1Rfz39hcyoHy/3j
AEziP1e243ZqpBleQQAAAEDBsKpzquKe0/QTheaoVSChK8gF6d38u5mwrtqihfMY
6A2rzJZSoqwrVF/Pf2FzKgfL/eMATOI/V7bjdmqkGV5BAAAAAAECAwQF
-----END OPENSSH PRIVATE KEY-----

real    0m0.331s
user    0m0.652s
sys     0m0.048s

$ vanity-keygen aaaaa
2023/04/05 08:30:12 Looking for a public key matching aaaaa
2023/04/05 08:30:13 Generated 71,000 keypairs (69,788 Hz)
2023/04/05 08:30:14 Generated 141,000 keypairs (70,310 Hz)
2023/04/05 08:30:15 Generated 212,000 keypairs (70,454 Hz)
2023/04/05 08:30:16 Generated 284,000 keypairs (70,792 Hz)
2023/04/05 08:30:17 Generated 356,000 keypairs (71,040 Hz)

$ GOARCH=arm GOARM=7 go build .
$ file ./vanity-keygen
./vanity-keygen: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, Go BuildID=Z_Cr4XM48GAIHSA-MQng/2wFeSpgr5k0WPASNS4ho/3FEwAtva33LS2ByXLcjP/0WSk_fEc6xXCDZEo89yH, with debug_info, not stripped

$ ./vanity-keygen -threads 4 aaaa
2023/04/05 08:22:58 Looking for a public key matching aaaa
2023/04/05 08:22:59 Generated 0 keypairs (0 Hz)
2023/04/05 08:23:00 Generated 4,000 keypairs (1,991 Hz)
2023/04/05 08:23:01 Generated 4,000 keypairs (1,332 Hz)
2023/04/05 08:23:02 Generated 8,000 keypairs (1,990 Hz)
2023/04/05 08:23:03 Generated 8,000 keypairs (1,598 Hz)
^C
$ cat /proc/device-tree/model && echo
Raspberry Pi 3 Model B Rev 1.2

$ ssh-keygen -p -f ./key
Key has comment ''
Enter new passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved with the new passphrase.

$ ssh-keygen -c -f ./key
Enter passphrase:
Old comment:
New comment: vanity
Comment 'vanity' applied

$ cpu-info
Packages:
        0: Intel Core i5-7300U
Microarchitectures:
        2x Sky Lake
Cores:
        0: 2 processors (0-1), Intel Sky Lake
        1: 2 processors (2-3), Intel Sky Lake
Logical processors (System ID):
        0 (0): APIC ID 0x00000000
        1 (2): APIC ID 0x00000001
        2 (1): APIC ID 0x00000002
        3 (3): APIC ID 0x00000003
$ lsb_release -dr
No LSB modules are available.
Description:    Debian GNU/Linux 12 (bookworm)
Release:        12
$ arch
x86_64