auth
2015-05-15
Parent:cf1aef6eb81f
auth/token_postgres.go
Switch to a JWT approach. We're going to use a JWT as our access tokens (as discussed in &yet's excellent post https://blog.andyet.com/2015/05/12/micro-services-user-info-and-auth and my ensuing conversation with Fritzy). The benefit of this approach is that we can do authentication and even some authorization without touching the database at all. The drawback is that we can no longer revoke access tokens, only the refresh tokens that grant the access tokens. We need a new config variable to set our private key, used to sign the JWT. We get to remove our token handlers, as we no longer can revoke tokens, so there's no purpose in getting information about it or listing them. Our tokenStore revokeToken gets to be simplified, as it will only ever be used for refresh tokens now. We also updated our postgres and memstore implementations. We added a helper method for generating the signed "access token" (our JWT) and started using it in the places where we're creating a Token. We get to remove the `revoked` SQL column for the tokens table, and rename the `refresh_revoked` column to just be `revoked`. We shortened our access token expiration to 15 minutes instead of an hour, to deal with the token not being revokable.
1 package auth
3 import (
4 "code.secondbit.org/uuid.hg"
6 "github.com/lib/pq"
7 "github.com/secondbit/pan"
8 )
10 func (t Token) GetSQLTableName() string {
11 return "tokens"
12 }
14 func (p *postgres) getTokenSQL(token string, refresh bool) *pan.Query {
15 var t Token
16 fields, _ := pan.GetFields(t)
17 query := pan.New(pan.POSTGRES, "SELECT "+pan.QueryList(fields)+" FROM "+pan.GetTableName(t))
18 query.IncludeWhere()
19 if !refresh {
20 query.Include(pan.GetUnquotedColumn(t, "AccessToken")+" = ?", token)
21 } else {
22 query.Include(pan.GetUnquotedColumn(t, "RefreshToken")+" = ?", token)
23 }
24 return query.FlushExpressions(" ")
25 }
27 func (p *postgres) getToken(token string, refresh bool) (Token, error) {
28 query := p.getTokenSQL(token, refresh)
29 rows, err := p.db.Query(query.String(), query.Args...)
30 if err != nil {
31 return Token{}, err
32 }
33 var t Token
34 var found bool
35 for rows.Next() {
36 err := pan.Unmarshal(rows, &t)
37 if err != nil {
38 return t, err
39 }
40 found = true
41 }
42 if err = rows.Err(); err != nil {
43 return t, err
44 }
45 if !found {
46 return t, ErrTokenNotFound
47 }
48 return t, nil
49 }
51 func (p *postgres) saveTokenSQL(token Token) *pan.Query {
52 fields, values := pan.GetFields(token)
53 query := pan.New(pan.POSTGRES, "INSERT INTO "+pan.GetTableName(token))
54 query.Include("(" + pan.QueryList(fields) + ")")
55 query.Include("VALUES")
56 query.Include("("+pan.VariableList(len(values))+")", values...)
57 return query.FlushExpressions(" ")
58 }
60 func (p *postgres) saveToken(token Token) error {
61 query := p.saveTokenSQL(token)
62 _, err := p.db.Exec(query.String(), query.Args...)
63 if e, ok := err.(*pq.Error); ok && e.Constraint == "tokens_pkey" {
64 err = ErrTokenAlreadyExists
65 }
66 if err != nil || len(token.Scopes) < 1 {
67 return err
68 }
69 return err
70 }
72 func (p *postgres) revokeTokenSQL(token string) *pan.Query {
73 var t Token
74 query := pan.New(pan.POSTGRES, "UPDATE "+pan.GetTableName(t)+" SET ")
75 query.Include(pan.GetUnquotedColumn(t, "Revoked")+" = ?", true)
76 query.IncludeWhere()
77 query.Include(pan.GetUnquotedColumn(t, "RefreshToken")+" = ?", token)
78 return query.FlushExpressions(" ")
79 }
81 func (p *postgres) revokeToken(token string) error {
82 query := p.revokeTokenSQL(token)
83 res, err := p.db.Exec(query.String(), query.Args...)
84 if err != nil {
85 return err
86 }
87 rows, err := res.RowsAffected()
88 if err != nil {
89 return err
90 }
91 if rows == 0 {
92 return ErrTokenNotFound
93 }
94 return nil
95 }
97 func (p *postgres) revokeTokensByProfileIDSQL(profileID uuid.ID) *pan.Query {
98 var t Token
99 query := pan.New(pan.POSTGRES, "UPDATE "+pan.GetTableName(t)+" SET ")
100 query.Include(pan.GetUnquotedColumn(t, "Revoked")+" = ?", true)
101 query.IncludeWhere()
102 query.Include(pan.GetUnquotedColumn(t, "ProfileID")+" = ?", profileID)
103 return query.FlushExpressions(" ")
104 }
106 func (p *postgres) revokeTokensByProfileID(profileID uuid.ID) error {
107 query := p.revokeTokensByProfileIDSQL(profileID)
108 res, err := p.db.Exec(query.String(), query.Args...)
109 if err != nil {
110 return err
111 }
112 rows, err := res.RowsAffected()
113 if err != nil {
114 return err
115 }
116 if rows == 0 {
117 return ErrProfileNotFound
118 }
119 return nil
120 }
122 func (p *postgres) revokeTokensByClientIDSQL(clientID uuid.ID) *pan.Query {
123 var t Token
124 query := pan.New(pan.POSTGRES, "UPDATE "+pan.GetTableName(t)+" SET ")
125 query.Include(pan.GetUnquotedColumn(t, "Revoked")+" = ?", true)
126 query.IncludeWhere()
127 query.Include(pan.GetUnquotedColumn(t, "ClientID")+" = ?", clientID)
128 return query.FlushExpressions(" ")
129 }
131 func (p *postgres) revokeTokensByClientID(clientID uuid.ID) error {
132 query := p.revokeTokensByClientIDSQL(clientID)
133 res, err := p.db.Exec(query.String(), query.Args...)
134 if err != nil {
135 return err
136 }
137 rows, err := res.RowsAffected()
138 if err != nil {
139 return err
140 }
141 if rows == 0 {
142 return ErrClientNotFound
143 }
144 return nil
145 }
147 func (p *postgres) getTokensByProfileIDSQL(profileID uuid.ID, num, offset int) *pan.Query {
148 var token Token
149 fields, _ := pan.GetFields(token)
150 query := pan.New(pan.POSTGRES, "SELECT "+pan.QueryList(fields)+" FROM "+pan.GetTableName(token))
151 query.IncludeWhere()
152 query.Include(pan.GetUnquotedColumn(token, "ProfileID")+" = ?", profileID)
153 query.IncludeLimit(int64(num))
154 query.IncludeOffset(int64(offset))
155 return query.FlushExpressions(" ")
156 }
158 func (p *postgres) getTokensByProfileID(profileID uuid.ID, num, offset int) ([]Token, error) {
159 query := p.getTokensByProfileIDSQL(profileID, num, offset)
160 rows, err := p.db.Query(query.String(), query.Args...)
161 if err != nil {
162 return []Token{}, err
163 }
164 var tokens []Token
165 var tokenIDs []string
166 for rows.Next() {
167 var token Token
168 err = pan.Unmarshal(rows, &token)
169 if err != nil {
170 return tokens, err
171 }
172 tokens = append(tokens, token)
173 tokenIDs = append(tokenIDs, token.AccessToken)
174 }
175 if err = rows.Err(); err != nil {
176 return tokens, err
177 }
178 return tokens, nil
179 }