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93 lines
3.5 KiB
Go
93 lines
3.5 KiB
Go
// Package processcreds is a credentials provider to retrieve credentials from a
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// external CLI invoked process.
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//
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// WARNING: The following describes a method of sourcing credentials from an external
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// process. This can potentially be dangerous, so proceed with caution. Other
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// credential providers should be preferred if at all possible. If using this
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// option, you should make sure that the config file is as locked down as possible
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// using security best practices for your operating system.
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//
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// # Concurrency and caching
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//
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// The Provider is not safe to be used concurrently, and does not provide any
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// caching of credentials retrieved. You should wrap the Provider with a
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// `aws.CredentialsCache` to provide concurrency safety, and caching of
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// credentials.
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//
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// # Loading credentials with the SDKs AWS Config
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//
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// You can use credentials from a AWS shared config `credential_process` in a
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// variety of ways.
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//
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// One way is to setup your shared config file, located in the default
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// location, with the `credential_process` key and the command you want to be
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// called. You also need to set the AWS_SDK_LOAD_CONFIG environment variable
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// (e.g., `export AWS_SDK_LOAD_CONFIG=1`) to use the shared config file.
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//
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// [default]
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// credential_process = /command/to/call
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//
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// Loading configuration using external will use the credential process to
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// retrieve credentials. NOTE: If there are credentials in the profile you are
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// using, the credential process will not be used.
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//
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// // Initialize a session to load credentials.
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// cfg, _ := config.LoadDefaultConfig(context.TODO())
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//
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// // Create S3 service client to use the credentials.
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// svc := s3.NewFromConfig(cfg)
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//
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// # Loading credentials with the Provider directly
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//
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// Another way to use the credentials process provider is by using the
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// `NewProvider` constructor to create the provider and providing a it with a
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// command to be executed to retrieve credentials.
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//
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// The following example creates a credentials provider for a command, and wraps
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// it with the CredentialsCache before assigning the provider to the Amazon S3 API
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// client's Credentials option.
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//
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// // Create credentials using the Provider.
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// provider := processcreds.NewProvider("/path/to/command")
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//
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// // Create the service client value configured for credentials.
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// svc := s3.New(s3.Options{
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// Credentials: aws.NewCredentialsCache(provider),
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// })
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//
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// If you need more control, you can set any configurable options in the
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// credentials using one or more option functions.
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//
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// provider := processcreds.NewProvider("/path/to/command",
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// func(o *processcreds.Options) {
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// // Override the provider's default timeout
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// o.Timeout = 2 * time.Minute
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// })
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//
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// You can also use your own `exec.Cmd` value by satisfying a value that satisfies
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// the `NewCommandBuilder` interface and use the `NewProviderCommand` constructor.
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//
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// // Create an exec.Cmd
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// cmdBuilder := processcreds.NewCommandBuilderFunc(
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// func(ctx context.Context) (*exec.Cmd, error) {
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// cmd := exec.CommandContext(ctx,
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// "customCLICommand",
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// "-a", "argument",
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// )
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// cmd.Env = []string{
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// "ENV_VAR_FOO=value",
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// "ENV_VAR_BAR=other_value",
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// }
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//
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// return cmd, nil
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// },
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// )
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//
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// // Create credentials using your exec.Cmd and custom timeout
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// provider := processcreds.NewProviderCommand(cmdBuilder,
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// func(opt *processcreds.Provider) {
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// // optionally override the provider's default timeout
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// opt.Timeout = 1 * time.Second
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// })
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package processcreds
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