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vault.go
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vault.go
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package commands
import (
"context"
"fmt"
"io"
"io/fs"
"os"
"path"
"strings"
"github.com/nhaancs/bhms/foundation/vault"
)
// Vault loads the current private key into the vault system.
func Vault(vaultConfig vault.Config, keysFolder string) error {
vaultSrv, err := vault.New(vault.Config{
Address: vaultConfig.Address,
Token: vaultConfig.Token,
MountPath: vaultConfig.MountPath,
})
if err != nil {
return fmt.Errorf("constructing vault: %w", err)
}
if err := loadKeys(vaultSrv, os.DirFS(keysFolder)); err != nil {
return err
}
return nil
}
func loadKeys(vault *vault.Vault, fsys fs.FS) error {
fn := func(fileName string, dirEntry fs.DirEntry, err error) error {
if err != nil {
return fmt.Errorf("walkdir failure: %w", err)
}
if dirEntry.IsDir() {
return nil
}
if path.Ext(fileName) != ".pem" {
return nil
}
file, err := fsys.Open(fileName)
if err != nil {
return fmt.Errorf("opening key file: %w", err)
}
defer file.Close()
// limit PEM file size to 1 megabyte. This should be reasonable for
// almost any PEM file and prevents shenanigans like linking the file
// to /dev/random or something like that.
privatePEM, err := io.ReadAll(io.LimitReader(file, 1024*1024))
if err != nil {
return fmt.Errorf("reading auth private key: %w", err)
}
kid := strings.TrimSuffix(dirEntry.Name(), ".pem")
fmt.Println("Loading kid:", kid)
if err := vault.AddPrivateKey(context.Background(), kid, privatePEM); err != nil {
return fmt.Errorf("put: %w", err)
}
return nil
}
fmt.Print("\n")
if err := fs.WalkDir(fsys, ".", fn); err != nil {
return fmt.Errorf("walking directory: %w", err)
}
return nil
}