Add bcrypt utilities

internal/util/cryptoutil/bcrypt.go

@@ -0,0 +1,25 @@
+package cryptoutil
+
+import (
+	"fmt"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+// CreateHash creates a bcrypt hash of the given password
+func CreateHash(password string) (string, error) {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", err
+	}
+	return string(hash), nil
+}
+
+// VerifyHash verifies the given password against the bcrypt hash
+func VerifyHash(password, hash string) error {
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	if err != nil {
+		return fmt.Errorf("invalid password")
+	}
+	return nil
+}

internal/util/cryptoutil/bcrypt_test.go

@@ -0,0 +1,39 @@
+package cryptoutil
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateHash(t *testing.T) {
+	password := "mysecretpassword"
+
+	hash, err := CreateHash(password)
+	assert.NoError(t, err)
+	assert.NotEmpty(t, hash)
+}
+
+func TestVerifyHash(t *testing.T) {
+	password := "mysecretpassword"
+
+	hash, err := CreateHash(password)
+	assert.NoError(t, err)
+	assert.NotEmpty(t, hash)
+
+	err = VerifyHash(password, hash)
+	assert.NoError(t, err)
+}
+
+func TestVerifyHash_InvalidPassword(t *testing.T) {
+	password := "mysecretpassword"
+	invalidPassword := "invalidpassword"
+
+	hash, err := CreateHash(password)
+	assert.NoError(t, err)
+	assert.NotEmpty(t, hash)
+
+	err = VerifyHash(invalidPassword, hash)
+	assert.Error(t, err)
+	assert.Equal(t, "invalid password", err.Error())
+}