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83 lines
2.4 KiB
83 lines
2.4 KiB
3 years ago
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# Armored ssh signatures in go
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[](https://pkg.go.dev/github.com/42wim/sshsig#section-documentation)
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Package sshsig implements signing/verifying armored SSH signatures.
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You can use this package to sign data and verify signatures using your ssh private keys or your ssh agent.
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It gives the same output as using `ssh-keygen`, eg when signing `ssh-keygen -Y sign -f keyfile -n namespace data`
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This code is based upon work by <https://github.com/sigstore/rekor>
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References: <https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.sshsig>
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You can find some examples on how to use this library on: <https://pkg.go.dev/github.com/42wim/sshsig#pkg-examples>
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## Examples
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```golang
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package main
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import (
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"bytes"
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"fmt"
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"net"
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"os"
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"github.com/42wim/sshsig"
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"golang.org/x/crypto/ssh/agent"
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)
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func ExampleSignWithAgent() {
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// This example will panic when you don't have a ssh-agent running.
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conn, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK"))
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if err != nil {
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panic(err)
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}
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ag := agent.NewClient(conn)
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// This public key must match in your agent (use `ssh-add -L` to get the public key)
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pubkey := []byte(`ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAo3D7CGN01tTYY/dLKXEv8RxRyxa32c51X0uKMhnMab wim@localhost`)
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//
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data := []byte("hello world")
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res, err := sshsig.SignWithAgent(pubkey, ag, bytes.NewBuffer(data), "file")
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if err != nil {
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panic(err)
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}
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fmt.Println(string(res))
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}
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func ExampleSign() {
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privkey := []byte(`-----BEGIN OPENSSH PRIVATE KEY-----
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b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
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QyNTUxOQAAACCOjP6i4Pm/pYAAmpAMNZ6xrbHl9RW8xdul6kzIWuKMMAAAAIhoQm34aEJt
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+AAAAAtzc2gtZWQyNTUxOQAAACCOjP6i4Pm/pYAAmpAMNZ6xrbHl9RW8xdul6kzIWuKMMA
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AAAEBfIl93TLj6qHeg37GnPuZ00h8OVv1mzlhy0rhuO4Y0do6M/qLg+b+lgACakAw1nrGt
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seX1FbzF26XqTMha4owwAAAAAAECAwQF
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-----END OPENSSH PRIVATE KEY-----`)
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data := []byte("hello world")
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res, err := sshsig.Sign(privkey, bytes.NewBuffer(data), "file")
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if err != nil {
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panic(err)
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}
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fmt.Println(string(res))
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// Output:
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// -----BEGIN SSH SIGNATURE-----
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// U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgjoz+ouD5v6WAAJqQDDWesa2x5f
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// UVvMXbpepMyFrijDAAAAAEZmlsZQAAAAAAAAAGc2hhNTEyAAAAUwAAAAtzc2gtZWQyNTUx
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// OQAAAEBeu9Z+vLxBORysiqEbTzJP0EZKG0/aE5HpTtvimjQS6mHZCAGFg+kimNatBE0Y1j
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// gS4pfD73TlML1SyB5lb/YO
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// -----END SSH SIGNATURE-----
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}
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func main() {
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ExampleSign()
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}
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```
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