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// Copyright 2022 Google LLC.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package util provides helper functions for the signer.
package util
import (
"encoding/json"
"io"
"os"
"strconv"
"strings"
)
// ParseHexString parses hexadecimal string into uint32
func ParseHexString(str string) (i uint32, err error) {
stripped := strings.Replace(str, "0x", "", -1)
resultUint64, err := strconv.ParseUint(stripped, 16, 32)
if err != nil {
return 0, err
}
return uint32(resultUint64), nil
}
// EnterpriseCertificateConfig contains parameters for initializing signer.
type EnterpriseCertificateConfig struct {
CertConfigs CertConfigs `json:"cert_configs"`
}
// CertConfigs is a container for various ECP Configs.
type CertConfigs struct {
PKCS11 PKCS11 `json:"pkcs11"`
}
// PKCS11 contains parameters describing the certificate to use.
type PKCS11 struct {
Slot string `json:"slot"` // The hexadecimal representation of the uint36 slot ID. (ex:0x1739427)
Label string `json:"label"` // The token label (ex: gecc)
PKCS11Module string `json:"module"` // The path to the pkcs11 module (shared lib)
UserPin string `json:"user_pin"` // Optional user pin to unlock the PKCS #11 module. If it is not defined or empty C_Login will not be called.
}
// LoadConfig retrieves the ECP config file.
func LoadConfig(configFilePath string) (config EnterpriseCertificateConfig, err error) {
jsonFile, err := os.Open(configFilePath)
if err != nil {
return EnterpriseCertificateConfig{}, err
}
byteValue, err := io.ReadAll(jsonFile)
if err != nil {
return EnterpriseCertificateConfig{}, err
}
err = json.Unmarshal(byteValue, &config)
if err != nil {
return EnterpriseCertificateConfig{}, err
}
return config, nil
}
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