chrly/di/signer.go

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package di
import (
"crypto/x509"
"encoding/base64"
"encoding/pem"
"errors"
"github.com/elyby/chrly/http"
. "github.com/elyby/chrly/signer"
"strings"
"github.com/goava/di"
"github.com/spf13/viper"
)
var signer = di.Options(
di.Provide(newTexturesSigner,
di.As(new(http.TexturesSigner)),
),
)
func newTexturesSigner(config *viper.Viper) (*Signer, error) {
keyStr := config.GetString("chrly.signing.key")
if keyStr == "" {
return nil, errors.New("chrly.signing.key must be set in order to sign textures")
}
var keyBytes []byte
if strings.HasPrefix(keyStr, "base64:") {
base64Value := keyStr[7:]
decodedKey, err := base64.URLEncoding.DecodeString(base64Value)
if err != nil {
return nil, err
}
keyBytes = decodedKey
} else {
keyBytes = []byte(keyStr)
}
rawPem, _ := pem.Decode(keyBytes)
key, err := x509.ParsePKCS1PrivateKey(rawPem.Bytes)
if err != nil {
return nil, err
}
return &Signer{Key: key}, nil
}