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Have to dynamic configuration in cli #2

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19 changes: 17 additions & 2 deletions readme.txt → README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,25 @@ Streaming obfuscator of sensitive data in PostgreSQL dumps (pg_dump).
$ pg_dump [...] |pgdump-obfuscator |less # inspect


TODO
Configuration
====

* Config file. Currently obfuscation rules are hardcoded in config.go, so you have to recompile to try new rules. Easy with `go run`.
```
pgdump-obfuscator -h

Usage of ./pgdump-obfuscator:
-c value
Configs, example: auth_user:email:email, auth_user:password:bytes
...
```

That mean you can provide as many "-c option" as you need.

Example:

```
pgdump-obfuscator -c auth_user:email:email -c auth_user:password:bytes -c address_useraddress:phone_number:digits -c address_useraddress:land_line:digits
```


Who
Expand Down
46 changes: 45 additions & 1 deletion main.go
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Expand Up @@ -13,8 +13,44 @@ import (
"strings"
"syscall"
"time"
"fmt"
)

type configFlags []string

func (self *configFlags) String() string {
return strings.Join(*self, ", ")
}

func (self *configFlags) Set(value string) error {
*self = append(*self, value)
return nil
}

func (self *configFlags) ToConfiguration() (*Configuration, error) {
configuration := &Configuration{}
for _, v := range *self {
splittedValues := strings.Split(v, ":")
if len(splittedValues) == 3 {
table, column, name := splittedValues[0], splittedValues[1], splittedValues[2]
scrambler, err := GetScrambleByName(name)
if err != nil {
return configuration, err
}
configuration.Obfuscations = append(
configuration.Obfuscations,
TargetedObfuscation{
Target{Table: table, Column: column},
scrambler,
},
)
} else {
return nil, errors.New(fmt.Sprintf("Inccorrect data in configuration flags!\n"))
}
}
return configuration, nil
}

type Target struct {
Database string
Schema string
Expand Down Expand Up @@ -155,9 +191,11 @@ func process(config *Configuration, input *bufio.Reader, output io.Writer) error
}

func main() {
var configs configFlags
inputPath := flag.String("input", "-", "Input filename, '-' for stdin")
cpuprofile := flag.String("cpuprofile", "", "Write CPU profile to file")
memprofile := flag.String("memprofile", "", "Write memory profile to file")
flag.Var(&configs, "c", "Configs, example: auth_user:email:email, auth_user:password:bytes")
flag.Parse()

if *cpuprofile != "" {
Expand Down Expand Up @@ -209,5 +247,11 @@ func main() {
// TODO
output := os.Stdout

process(Config, input, output)
configuration, err := configs.ToConfiguration()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}

process(configuration, input, output)
}
16 changes: 16 additions & 0 deletions obfuscators.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@ import (
"crypto/rand"
"crypto/sha256"
"net"
"errors"
"fmt"
)

var Salt []byte
Expand Down Expand Up @@ -126,6 +128,20 @@ func ScrambleInet(s []byte) []byte {
return []byte(ip.String())
}

func GetScrambleByName(value string) (func(s []byte) []byte, error) {
switch value {
case "bytes":
return ScrambleBytes, nil
case "digits":
return ScrambleDigits, nil
case "email":
return ScrambleEmail, nil
case "inet":
return ScrambleInet, nil
}
return nil, errors.New(fmt.Sprintf("%s is not registered scramble function", value))
}

func init() {
Salt = make([]byte, 16)
_, err := rand.Read(Salt)
Expand Down