Files
nextcloud/aio-container-tools/cmd/aio-pg-init/main.go
Pablo Zmdl 1039363de6 Allow arbitrary characters in passwords
This converts some shell scripted commands to small golang tools
("aio-container-tools") in order to ensure proper string handling.

In effect database passwords now can contain all characters, even emojis
and quotes.

AI-assistant: Copilot v1.0.7 (Claude Sonnet 4.6)

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>
2026-03-24 20:11:34 +01:00

79 lines
2.8 KiB
Go

package main
import (
"context"
"flag"
"fmt"
"strings"
"github.com/jackc/pgx/v5"
"github.com/nextcloud/aio-container-tools/internal/util"
)
// quoteLiteral safely quotes a string as a PostgreSQL string literal.
// Single quotes are escaped by doubling them. This is safe with
// standard_conforming_strings=on (default since PostgreSQL 9.1).
func quoteLiteral(s string) string {
return "'" + strings.ReplaceAll(s, "'", "''") + "'"
}
// main reimplements init-user-db.sh:
// - Creates $POSTGRES_DB_OWNER (falling back to $POSTGRES_USER) with $POSTGRES_PASSWORD and CREATEDB
// - Transfers ownership of $POSTGRES_DB to that user
// - Grants all privileges on the database and public schema
// - Connects using $POSTGRES_USER in all cases
func main() {
debug := flag.Bool("debug", false, "enable debug output")
flag.Parse()
util.SetDebug(*debug)
util.Debugf("reading required environment variables")
pgUser := util.RequireEnv("POSTGRES_USER")
pgPassword := util.RequireEnv("POSTGRES_PASSWORD")
pgDB := util.RequireEnv("POSTGRES_DB")
pgDBOwner := util.OptionalEnv("POSTGRES_DB_OWNER", pgUser)
util.Debugf("building connection config: host=/var/run/postgresql port=5432 user=%s database=%s", pgUser, pgDB)
cfg, err := pgx.ParseConfig("")
if err != nil {
util.ErrorOut(fmt.Errorf("building connection config: %w", err))
}
cfg.Host = "/var/run/postgresql"
cfg.Port = 5432
cfg.User = pgUser
cfg.Password = pgPassword
cfg.Database = pgDB
ctx := context.Background()
util.Debugf("connecting to postgres via unix socket")
conn, err := pgx.ConnectConfig(ctx, cfg)
if err != nil {
util.ErrorOut(fmt.Errorf("connecting to postgres: %w", err))
}
defer conn.Close(ctx)
util.Debugf("connected successfully")
dbOwner := pgDBOwner
util.Debugf("dbOwner = %q (from POSTGRES_DB_OWNER=%q, POSTGRES_USER=%q)", dbOwner, pgDBOwner, pgUser)
// pgx.Identifier.Sanitize() double-quotes and escapes the identifier safely.
dbOwnerIdent := pgx.Identifier{dbOwner}.Sanitize()
dbIdent := pgx.Identifier{pgDB}.Sanitize()
util.Debugf("quoted dbOwnerIdent = %s, dbIdent = %s", dbOwnerIdent, dbIdent)
statements := []string{
fmt.Sprintf("CREATE USER %s WITH PASSWORD %s CREATEDB", dbOwnerIdent, quoteLiteral(pgPassword)),
fmt.Sprintf("ALTER DATABASE %s OWNER TO %s", dbIdent, dbOwnerIdent),
fmt.Sprintf("GRANT ALL PRIVILEGES ON DATABASE %s TO %s", dbIdent, dbOwnerIdent),
fmt.Sprintf("GRANT ALL PRIVILEGES ON SCHEMA public TO %s", dbOwnerIdent),
}
for i, stmt := range statements {
util.Debugf("executing statement %d/%d: %s", i+1, len(statements), stmt)
if _, err := conn.Exec(ctx, stmt); err != nil {
util.ErrorOut(fmt.Errorf("executing statement: %w", err))
}
util.Debugf("statement %d/%d succeeded", i+1, len(statements))
}
util.Debugf("all statements executed successfully")
}