78 lines
2.5 KiB
Go
78 lines
2.5 KiB
Go
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package auth
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import (
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"encoding/json"
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"fmt"
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"strings"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/consul/authmethod"
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"github.com/hashicorp/consul/agent/consul/state"
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"github.com/hashicorp/consul/agent/structs"
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)
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// Login wraps the process of creating an ACLToken from the identity verified
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// by an auth method.
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type Login struct {
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binder *Binder
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writer *TokenWriter
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}
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// NewLogin returns a new Login with the given binder and writer.
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func NewLogin(binder *Binder, writer *TokenWriter) *Login {
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return &Login{binder, writer}
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}
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// TokenForVerifiedIdentity creates an ACLToken for the given identity verified
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// by an auth method.
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func (l *Login) TokenForVerifiedIdentity(identity *authmethod.Identity, authMethod *structs.ACLAuthMethod, description string) (*structs.ACLToken, error) {
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bindings, err := l.binder.Bind(authMethod, identity)
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switch {
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case err != nil:
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return nil, err
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case bindings.None():
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// We try to prevent the creation of a useless token without taking a trip
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// through Raft and the state store if we can.
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return nil, acl.ErrPermissionDenied
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}
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token := &structs.ACLToken{
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Description: description,
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Local: authMethod.TokenLocality != "global", // TokenWriter prevents the creation of global tokens in secondary datacenters.
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AuthMethod: authMethod.Name,
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ExpirationTTL: authMethod.MaxTokenTTL,
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ServiceIdentities: bindings.ServiceIdentities,
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NodeIdentities: bindings.NodeIdentities,
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Roles: bindings.Roles,
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EnterpriseMeta: bindings.EnterpriseMeta,
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}
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token.ACLAuthMethodEnterpriseMeta.FillWithEnterpriseMeta(&authMethod.EnterpriseMeta)
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updated, err := l.writer.Create(token, true)
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switch {
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case err != nil && strings.Contains(err.Error(), state.ErrTokenHasNoPrivileges.Error()):
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// If we were in a slight race with a role delete operation then we may
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// still end up failing to insert an unprivileged token in the state
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// machine instead. Return the same error as earlier so it doesn't
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// actually matter which one prevents the insertion.
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return nil, acl.ErrPermissionDenied
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case err != nil:
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return nil, err
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}
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return updated, nil
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}
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// BuildTokenDescription builds a description for an ACLToken by encoding the
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// given meta as JSON and applying the prefix.
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func BuildTokenDescription(prefix string, meta map[string]string) (string, error) {
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if len(meta) == 0 {
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return prefix, nil
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}
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d, err := json.Marshal(meta)
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("%s: %s", prefix, d), nil
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}
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