mirror of
https://github.com/Luzifer/korvike.git
synced 2024-11-14 02:02:41 +00:00
105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
package functions
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"os"
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"github.com/hashicorp/vault/api"
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homedir "github.com/mitchellh/go-homedir"
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)
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func init() {
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registerFunction("vault", func(name string, v ...string) (interface{}, error) {
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if name == "" {
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return nil, fmt.Errorf("Path is not set")
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}
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if len(v) < 1 {
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return nil, fmt.Errorf("Key is not set")
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}
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client, err := vaultClientFromEnvOrFile()
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if err != nil {
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return nil, err
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}
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secret, err := client.Logical().Read(name)
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if err != nil {
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return nil, err
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}
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if secret != nil && secret.Data != nil {
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if val, ok := secret.Data[v[0]]; ok {
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return val, nil
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}
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}
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if len(v) < 2 {
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return nil, fmt.Errorf("Requested value %q in key %q was not found in Vault and no default was set", v[0], name)
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}
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return v[1], nil
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})
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}
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func vaultClientFromEnvOrFile() (*api.Client, error) {
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client, err := api.NewClient(&api.Config{
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Address: os.Getenv(api.EnvVaultAddress),
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})
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if err != nil {
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return nil, err
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}
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switch {
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case os.Getenv(api.EnvVaultToken) != "":
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client.SetToken(os.Getenv(api.EnvVaultToken))
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case os.Getenv("VAULT_ROLE_ID") != "":
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if err = setVaultTokenFromRoleID(client); err != nil {
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return nil, fmt.Errorf("Unable to fetch VAULT_TOKEN: %s", err)
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}
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case hasTokenFile():
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if f, err := homedir.Expand("~/.vault-token"); err == nil {
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if b, err := ioutil.ReadFile(f); err == nil {
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client.SetToken(string(b))
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}
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}
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default:
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return nil, errors.New("Neither VAULT_TOKEN nor VAULT_ROLE_ID was found in ENV and no ~/.vault-token file is present")
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}
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return client, nil
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}
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func hasTokenFile() bool {
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if f, err := homedir.Expand("~/.vault-token"); err == nil {
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if _, err := os.Stat(f); err == nil {
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return true
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}
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}
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return false
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}
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func setVaultTokenFromRoleID(client *api.Client) error {
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data := map[string]interface{}{
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"role_id": os.Getenv("VAULT_ROLE_ID"),
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}
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if os.Getenv("VAULT_SECRET_ID") != "" {
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data["secret_id"] = os.Getenv("VAULT_SECRET_ID")
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}
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loginSecret, lserr := client.Logical().Write("auth/approle/login", data)
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if lserr != nil || loginSecret.Auth == nil {
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return fmt.Errorf("Unable to fetch authentication token: %s", lserr)
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}
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client.SetToken(loginSecret.Auth.ClientToken)
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return nil
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}
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