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76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package hsm
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import (
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"context"
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"errors"
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"fmt"
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"log"
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"os"
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"strings"
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"syscall"
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"github.com/ThalesIgnite/crypto11"
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"golang.org/x/term"
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)
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func prepareCrypto11Context(ctx context.Context, label string) (*crypto11.Context, error) {
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storage, ok := GetSignerConfig(ctx).KeyStorage[label]
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if !ok {
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return nil, fmt.Errorf("could not find storage definition with label %s", label)
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}
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var (
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err error
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p11Context *crypto11.Context
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)
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p11Config := &crypto11.Config{
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Path: storage.Module,
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TokenLabel: storage.Label,
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}
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log.Printf("using PKCS#11 module %s", p11Config.Path)
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log.Printf("looking for token with label %s", p11Config.TokenLabel)
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p11Config.Pin, err = getPin(p11Config)
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if err != nil {
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return nil, err
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}
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p11Context, err = crypto11.Configure(p11Config)
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if err != nil {
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return nil, fmt.Errorf("could not configure PKCS#11 library: %v", err)
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}
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return p11Context, nil
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}
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func getPin(p11Config *crypto11.Config) (string, error) {
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tokenPinEnv := strings.ReplaceAll(p11Config.TokenLabel, "-", "_")
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tokenPinEnv = strings.ReplaceAll(tokenPinEnv, " ", "_")
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tokenPinEnv = strings.ToUpper(tokenPinEnv)
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tokenPinEnv = fmt.Sprintf("TOKEN_PIN_%s", tokenPinEnv)
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pin, found := os.LookupEnv(tokenPinEnv)
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if !found {
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log.Printf("environment variable %s has not been set", tokenPinEnv)
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if !term.IsTerminal(syscall.Stdin) {
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return "", errors.New("stdin is not a terminal")
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}
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fmt.Printf("Enter PIN for token %s: ", p11Config.TokenLabel)
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bytePin, err := term.ReadPassword(syscall.Stdin)
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if err != nil {
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return "", errors.New("could not read PIN")
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}
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fmt.Println()
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pin = string(bytePin)
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}
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return strings.TrimSpace(pin), nil
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}
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