1 files changed, 63 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/terraform/svchost/auth/credentials.go b/vendor/github.com/hashicorp/terraform/svchost/auth/credentials.go
new file mode 100644
index 0000000..0372c16
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/svchost/auth/credentials.go
@@ -0,0 +1,63 @@
+// Package auth contains types and functions to manage authentication
+// credentials for service hosts.
+package auth
+
+import (
+        "net/http"
+
+        "github.com/hashicorp/terraform/svchost"
+)
+
+// Credentials is a list of CredentialsSource objects that can be tried in
+// turn until one returns credentials for a host, or one returns an error.
+//
+// A Credentials is itself a CredentialsSource, wrapping its members.
+// In principle one CredentialsSource can be nested inside another, though
+// there is no good reason to do so.
+type Credentials []CredentialsSource
+
+// NoCredentials is an empty CredentialsSource that always returns nil
+// when asked for credentials.
+var NoCredentials CredentialsSource = Credentials{}
+
+// A CredentialsSource is an object that may be able to provide credentials
+// for a given host.
+//
+// Credentials lookups are not guaranteed to be concurrency-safe. Callers
+// using these facilities in concurrent code must use external concurrency
+// primitives to prevent race conditions.
+type CredentialsSource interface {
+        // ForHost returns a non-nil HostCredentials if the source has credentials
+        // available for the host, and a nil HostCredentials if it does not.
+        //
+        // If an error is returned, progress through a list of CredentialsSources
+        // is halted and the error is returned to the user.
+        ForHost(host svchost.Hostname) (HostCredentials, error)
+}
+
+// HostCredentials represents a single set of credentials for a particular
+// host.
+type HostCredentials interface {
+        // PrepareRequest modifies the given request in-place to apply the
+        // receiving credentials. The usual behavior of this method is to
+        // add some sort of Authorization header to the request.
+        PrepareRequest(req *http.Request)
+
+        // Token returns the authentication token.
+        Token() string
+}
+
+// ForHost iterates over the contained CredentialsSource objects and
+// tries to obtain credentials for the given host from each one in turn.
+//
+// If any source returns either a non-nil HostCredentials or a non-nil error
+// then this result is returned. Otherwise, the result is nil, nil.
+func (c Credentials) ForHost(host svchost.Hostname) (HostCredentials, error) {
+        for _, source := range c {
+                creds, err := source.ForHost(host)
+                if creds != nil || err != nil {
+                        return creds, err
+                }
+        }
+        return nil, nil
+}