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104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package auth
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import (
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"encoding/json"
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"io"
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)
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// BasicAuther is the interface an object must support to return basic auth information.
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type BasicAuther interface {
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BasicAuth() (string, string, bool)
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}
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// Credential represents authentication and authorization configuration for a single user.
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type Credential struct {
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Username string `json:"username,omitempty"`
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Password string `json:"password,omitempty"`
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Perms []string `json:"perms,omitempty"`
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}
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// CredentialsStore stores authentication and authorization information for all users.
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type CredentialsStore struct {
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store map[string]string
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perms map[string]map[string]bool
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}
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// NewCredentialsStore returns a new instance of a CredentialStore.
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func NewCredentialsStore() *CredentialsStore {
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return &CredentialsStore{
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store: make(map[string]string),
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perms: make(map[string]map[string]bool),
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}
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}
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// Load loads credential information from a reader.
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func (c *CredentialsStore) Load(r io.Reader) error {
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dec := json.NewDecoder(r)
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// Read open bracket
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_, err := dec.Token()
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if err != nil {
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return err
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}
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var cred Credential
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for dec.More() {
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err := dec.Decode(&cred)
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if err != nil {
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return err
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}
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c.store[cred.Username] = cred.Password
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c.perms[cred.Username] = make(map[string]bool, len(cred.Perms))
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for _, p := range cred.Perms {
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c.perms[cred.Username][p] = true
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}
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}
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// Read closing bracket.
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_, err = dec.Token()
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if err != nil {
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return err
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}
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return nil
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}
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// Check returns true if the password is correct for the given username.
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func (c *CredentialsStore) Check(username, password string) bool {
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pw, ok := c.store[username]
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return ok && password == pw
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}
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// CheckRequest returns true if b contains a valid username and password.
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func (c *CredentialsStore) CheckRequest(b BasicAuther) bool {
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username, password, ok := b.BasicAuth()
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if !ok || !c.Check(username, password) {
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return false
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}
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return true
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}
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// HasPerm returns true if username has the given perm. It does not
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// perform any password checking.
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func (c *CredentialsStore) HasPerm(username string, perm string) bool {
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m, ok := c.perms[username]
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if !ok {
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return false
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}
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if _, ok := m[perm]; !ok {
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return false
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}
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return true
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}
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// HasPermRequest returns true if the username returned by b has the givem perm.
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// It does not perform any password checking, but if there is no username
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// in the request, it returns false.
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func (c *CredentialsStore) HasPermRequest(b BasicAuther, perm string) bool {
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username, _, ok := b.BasicAuth()
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if !ok {
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return false
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}
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return c.HasPerm(username, perm)
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}
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