mirror of
https://github.com/pomerium/pomerium.git
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74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package authorize // import "github.com/pomerium/pomerium/authorize"
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import (
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"encoding/base64"
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"errors"
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"fmt"
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"github.com/pomerium/pomerium/internal/log"
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"github.com/pomerium/pomerium/internal/config"
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"github.com/pomerium/pomerium/internal/policy"
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)
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// ValidateOptions checks to see if configuration values are valid for the
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// authorize service. Returns first error, if found.
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func ValidateOptions(o *config.Options) error {
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decoded, err := base64.StdEncoding.DecodeString(o.SharedKey)
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if err != nil {
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return fmt.Errorf("authorize: `SHARED_SECRET` setting is invalid base64: %v", err)
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}
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if len(decoded) != 32 {
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return fmt.Errorf("authorize: `SHARED_SECRET` want 32 but got %d bytes", len(decoded))
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}
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if len(o.Policies) == 0 {
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return errors.New("missing setting: no policies defined")
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}
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return nil
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}
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// Authorize struct holds
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type Authorize struct {
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SharedKey string
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identityAccess IdentityValidator
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// contextValidator
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// deviceValidator
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}
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// New validates and creates a new Authorize service from a set of Options
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func New(opts *config.Options) (*Authorize, error) {
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if opts == nil {
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return nil, errors.New("authorize: options cannot be nil")
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}
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if err := ValidateOptions(opts); err != nil {
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return nil, err
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}
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// errors handled by validate
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sharedKey, _ := base64.StdEncoding.DecodeString(opts.SharedKey)
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return &Authorize{
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SharedKey: string(sharedKey),
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identityAccess: NewIdentityWhitelist(opts.Policies, opts.Administrators),
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}, nil
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}
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// NewIdentityWhitelist returns an indentity validator.
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// todo(bdd) : a radix-tree implementation is probably more efficient
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func NewIdentityWhitelist(policies []policy.Policy, admins []string) IdentityValidator {
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return newIdentityWhitelistMap(policies, admins)
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}
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// ValidIdentity returns if an identity is authorized to access a route resource.
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func (a *Authorize) ValidIdentity(route string, identity *Identity) bool {
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return a.identityAccess.Valid(route, identity)
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}
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// UpdateOptions updates internal structres based on config.Options
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func (a *Authorize) UpdateOptions(o *config.Options) error {
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log.Info().Msg("authorize: updating options")
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a.identityAccess = NewIdentityWhitelist(o.Policies, o.Administrators)
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return nil
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}
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