Function RetrieveAuthTokenFromImage

cli/command/registry.go:192–212

RetrieveAuthTokenFromImage retrieves an encoded auth token given a complete image reference. The auth configuration is serialized as a base64url encoded ([RFC 4648, Section 5]) JSON string for sending through the "X-Registry-Auth" header. [RFC 4648, Section 5]: https://tools.ietf.org/html/rfc4648#s

(cfg *configfile.ConfigFile, image string)

//
// [RFC 4648, Section 5]: https://tools.ietf.org/html/rfc4648#section-5
func RetrieveAuthTokenFromImage(cfg *configfile.ConfigFile, image string) (string, error) {
	registryRef, err := reference.ParseNormalizedNamed(image)
	if err != nil {
		return "", err
	}
	authConfig, err := cfg.GetAuthConfig(reference.Domain(registryRef))
	if err != nil {
		return "", err
	}

	return authconfig.Encode(registrytypes.AuthConfig{
		Username:      authConfig.Username,
		Password:      authConfig.Password,
		ServerAddress: authConfig.ServerAddress,

		// TODO(thaJeztah): Are these expected to be included?
		Auth:          authConfig.Auth,
		IdentityToken: authConfig.IdentityToken,
		RegistryToken: authConfig.RegistryToken,
	})
}