1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// database storage
package dbstore
import (
"context"
db_sql "database/sql"
"embed"
"fmt"
_ "github.com/mattn/go-sqlite3"
"github.com/pablotron/cvez/cpedict"
)
//go:embed sql
var sqlFs embed.FS
type DbStore struct {
db *db_sql.DB
}
// open database
func Open(path string) (DbStore, error) {
var r DbStore
// init db
if db, err := db_sql.Open("sqlite3", path); err != nil {
return r, err
} else {
r.db = db
return r, nil
}
}
// initialized database version
const initDbVersion = 314159
func (me DbStore) isInitialized(ctx context.Context) (bool, error) {
sql := "PRAGMA user_version;"
// get version
var version int32
if err := me.db.QueryRowContext(ctx, sql).Scan(&version); err != nil {
return false, err
}
// return result
return (version == initDbVersion), nil
}
// initialize database
func (me DbStore) Init(ctx context.Context) error {
if inited, err := me.isInitialized(ctx); err != nil {
return err
} else if inited {
// already initialized, return success
return nil
}
// read init query
sql, err := sqlFs.ReadFile("sql/init.sql")
if err != nil {
return err
}
// exec init query, return result
_, err = me.db.ExecContext(ctx, string(sql))
return err
}
// get single query from embedded filesystem
func getQuery(id string) (string, error) {
// read query
if data, err := sqlFs.ReadFile(fmt.Sprintf("sql/%s.sql", id)); err != nil {
return "", err
} else {
// return query
return string(data), nil
}
}
// return query map
func getQueries(ids []string) (map[string]string, error) {
r := make(map[string]string)
for _, id := range(ids) {
// read query
if sql, err := getQuery(id); err != nil {
return r, fmt.Errorf("%s: %s", id, err.Error())
} else {
// save query
r[id] = sql
}
}
// return success
return r, nil
}
// import CPE dictionary
func (me DbStore) AddCpeDictionary(ctx context.Context, dict cpedict.Dictionary) error {
// lazy-init db
if err := me.Init(ctx); err != nil {
return err
}
// build query map
queryIds := []string { "insert-cpe", "insert-title", "insert-ref" }
queries, err := getQueries(queryIds)
if err != nil {
return err
}
// begin context
tx, err := me.db.BeginTx(ctx, nil)
if err != nil {
return err
}
// build statements
sts := make(map[string]*db_sql.Stmt)
for id, sql := range(queries) {
if st, err := tx.PrepareContext(ctx, sql); err != nil {
return err
} else {
sts[id] = st
defer sts[id].Close()
}
}
// add items
for _, item := range(dict.Items) {
// add cpe
rs, err := sts["insert-cpe"].ExecContext(ctx, item.CpeUri, item.Cpe23Item.Name)
if err != nil {
return err
}
// get last row ID
id, err := rs.LastInsertId()
if err != nil {
return err
}
// add titles
for _, title := range(item.Titles) {
_, err := sts["insert-title"].ExecContext(ctx, id, title.Lang, title.Text)
if err != nil {
return err
}
}
// add refs
for _, ref := range(item.References) {
_, err := sts["insert-ref"].ExecContext(ctx, id, ref.Href, ref.Text)
if err != nil {
return err
}
}
}
// commit changes, return result
return tx.Commit()
}
// search CPEs
func (me DbStore) CpeSearch(
ctx context.Context,
searchType CpeSearchType,
s string,
) ([]CpeSearchRow, error) {
var r []CpeSearchRow
// lazy-init db
if err := me.Init(ctx); err != nil {
return r, err
}
// get query
sql, err := getQuery(searchType.String())
if err != nil {
return r, err
}
// exec search query
rows, err := me.db.QueryContext(ctx, sql, db_sql.Named("q", s))
if err != nil {
return r, err
}
// walk results
for rows.Next() {
if sr, err := unmarshalCpeSearchRow(rows); err != nil {
// return error
return r, err
} else {
// append to results
r = append(r, sr)
}
}
// close rows
if err = rows.Close(); err != nil {
return r, err
}
// check for iteration errors
if err = rows.Err(); err != nil {
return r, err
}
// return success
return r, nil
}
|
