awskms

package
Version: v0.23.0 Latest Latest
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Published: May 15, 2021 License: Apache-2.0 Imports: 16 Imported by: 5

Documentation

Overview

Package awskms provides a secrets implementation backed by AWS KMS. Use OpenKeeper to construct a *secrets.Keeper.

URLs

For secrets.OpenKeeper, awskms registers for the scheme "awskms". The default URL opener will use an AWS session with the default credentials and configuration; see https://docs.aws.amazon.com/sdk-for-go/api/aws/session/ for more details. To customize the URL opener, or for more details on the URL format, see URLOpener. See https://gocloud.dev/concepts/urls/ for background information.

As

awskms exposes the following type for As:

- Error: awserr.Error
Example (OpenFromURL)
package main

import (
	"context"
	"log"

	"gocloud.dev/secrets"
)

func main() {
	// PRAGMA: This example is used on gocloud.dev; PRAGMA comments adjust how it is shown and can be ignored.
	// PRAGMA: On gocloud.dev, add a blank import: _ "gocloud.dev/secrets/awskms"
	// PRAGMA: On gocloud.dev, hide lines until the next blank line.
	ctx := context.Background()

	// Use one of the following:

	// 1. By ID.
	keeperByID, err := secrets.OpenKeeper(ctx,
		"awskms://1234abcd-12ab-34cd-56ef-1234567890ab?region=us-east-1")
	if err != nil {
		log.Fatal(err)
	}
	defer keeperByID.Close()

	// 2. By alias.
	keeperByAlias, err := secrets.OpenKeeper(ctx,
		"awskms://alias/ExampleAlias?region=us-east-1")
	if err != nil {
		log.Fatal(err)
	}
	defer keeperByAlias.Close()

	// 3. By ARN.
	const arn = "arn:aws:kms:us-east-1:111122223333:key/" +
		"1234abcd-12ab-34bc-56ef-1234567890ab"
	keeperByARN, err := secrets.OpenKeeper(ctx,
		"awskms://"+arn+"?region=us-east-1")
	if err != nil {
		log.Fatal(err)
	}
	defer keeperByARN.Close()
}
Output:

Index

Examples

Constants

View Source
const Scheme = "awskms"

Scheme is the URL scheme awskms registers its URLOpener under on secrets.DefaultMux.

Variables

View Source
var Set = wire.NewSet(
	wire.Struct(new(URLOpener), "ConfigProvider"),
	Dial,
)

Set holds Wire providers for this package.

Functions

func Dial

func Dial(p client.ConfigProvider) (*kms.KMS, error)

Dial gets an AWS KMS service client.

func OpenKeeper

func OpenKeeper(client *kms.KMS, keyID string, opts *KeeperOptions) *secrets.Keeper

OpenKeeper returns a *secrets.Keeper that uses AWS KMS. The key ID can be in the form of an Amazon Resource Name (ARN), alias name, or alias ARN. See https://docs.aws.amazon.com/kms/latest/developerguide/viewing-keys.html#find-cmk-id-arn for more details. See the package documentation for an example.

Example
package main

import (
	"log"

	"github.com/aws/aws-sdk-go/aws/session"
	"gocloud.dev/secrets/awskms"
)

func main() {
	// PRAGMA: This example is used on gocloud.dev; PRAGMA comments adjust how it is shown and can be ignored.

	// Establish an AWS session.
	// See https://docs.aws.amazon.com/sdk-for-go/api/aws/session/ for more info.
	sess, err := session.NewSession(nil)
	if err != nil {
		log.Fatal(err)
	}

	// Get a client to use with the KMS API.
	client, err := awskms.Dial(sess)
	if err != nil {
		log.Fatal(err)
	}

	// Construct a *secrets.Keeper.
	keeper := awskms.OpenKeeper(client, "alias/test-secrets", nil)
	defer keeper.Close()
}
Output:

Types

type KeeperOptions

type KeeperOptions struct{}

KeeperOptions controls Keeper behaviors. It is provided for future extensibility.

type URLOpener

type URLOpener struct {
	// ConfigProvider must be set to a non-nil value.
	ConfigProvider client.ConfigProvider

	// Options specifies the options to pass to OpenKeeper.
	Options KeeperOptions
}

URLOpener opens AWS KMS URLs like "awskms://keyID" or "awskms:///keyID".

The URL Host + Path are used as the key ID, which can be in the form of an Amazon Resource Name (ARN), alias name, or alias ARN. See https://docs.aws.amazon.com/kms/latest/developerguide/viewing-keys.html#find-cmk-id-arn for more details. Note that ARNs may contain ":" characters, which cannot be escaped in the Host part of a URL, so the "awskms:///<ARN>" form should be used.

See gocloud.dev/aws/ConfigFromURLParams for supported query parameters for overriding the aws.Session from the URL.

func (*URLOpener) OpenKeeperURL

func (o *URLOpener) OpenKeeperURL(ctx context.Context, u *url.URL) (*secrets.Keeper, error)

OpenKeeperURL opens an AWS KMS Keeper based on u.

Source Files

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