auth
auth/config.go
Randomly generate codes. We've been using our IDs for auth codes. But our IDs may at some point be non-random, for the purpose of optimising database performance, or some other perfectly valid reason. Auth codes we always want to be random, and have no relation to IDs, so why conflate them? Instead, we pull 16 random bytes out of crypto/rand.Reader and hex encode them.
| paddy@96 | 1 package auth |
| paddy@96 | 2 |
| paddy@96 | 3 import ( |
| paddy@96 | 4 "errors" |
| paddy@96 | 5 "html/template" |
| paddy@101 | 6 "log" |
| paddy@96 | 7 ) |
| paddy@96 | 8 |
| paddy@96 | 9 var ( |
| paddy@96 | 10 // ErrInvalidLoginURI is returned when a Context is instantiated with a Config object that specifies a LoginURI that can't be parsed as a URL. |
| paddy@96 | 11 ErrInvalidLoginURI = errors.New("invalid login URI") |
| paddy@102 | 12 // ErrConfigNotInitialized is returned when a Context is instantiated with a Config object that hasn't had its Init function called. |
| paddy@102 | 13 ErrConfigNotInitialized = errors.New("config not initialized") |
| paddy@96 | 14 ) |
| paddy@96 | 15 |
| paddy@96 | 16 // Config holds the configuration values necessary to run a server. A Config |
| paddy@96 | 17 // instance is the only way to instantiate a Context variable. |
| paddy@96 | 18 type Config struct { |
| paddy@96 | 19 ClientStore clientStore |
| paddy@96 | 20 AuthCodeStore authorizationCodeStore |
| paddy@96 | 21 ProfileStore profileStore |
| paddy@96 | 22 TokenStore tokenStore |
| paddy@96 | 23 SessionStore sessionStore |
| paddy@134 | 24 ScopeStore scopeStore |
| paddy@96 | 25 Template *template.Template |
| paddy@96 | 26 LoginURI string |
| paddy@96 | 27 iterations int |
| paddy@132 | 28 secureCookie bool |
| paddy@96 | 29 } |
| paddy@101 | 30 |
| paddy@102 | 31 // Init is a function that preps the Config object to be used for Context creation, setting variables |
| paddy@102 | 32 // that are determined at the beginning of program execution. |
| paddy@101 | 33 func (c *Config) Init() error { |
| paddy@101 | 34 scheme, ok := passphraseSchemes[CurPassphraseScheme] |
| paddy@101 | 35 if !ok { |
| paddy@101 | 36 return ErrInvalidPassphraseScheme |
| paddy@101 | 37 } |
| paddy@101 | 38 var err error |
| paddy@101 | 39 c.iterations, err = scheme.calculateIterations() |
| paddy@101 | 40 if err != nil { |
| paddy@101 | 41 return err |
| paddy@101 | 42 } |
| paddy@101 | 43 log.Printf("Generating passphrases with %d iterations...\n", c.iterations) |
| paddy@101 | 44 return nil |
| paddy@101 | 45 } |