CHORE: Vendor go-powershell (#2837)

pkg/powershell/middleware/session_config.go

@@ -0,0 +1,95 @@
+// Copyright (c) 2017 Gorillalabs. All rights reserved.
+
+package middleware
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/StackExchange/dnscontrol/v4/pkg/powershell/utils"
+	"github.com/juju/errors"
+)
+
+const (
+	HTTPPort  = 5985
+	HTTPSPort = 5986
+)
+
+type SessionConfig struct {
+	ComputerName          string
+	AllowRedirection      bool
+	Authentication        string
+	CertificateThumbprint string
+	Credential            interface{}
+	Port                  int
+	UseSSL                bool
+}
+
+func NewSessionConfig() *SessionConfig {
+	return &SessionConfig{}
+}
+
+func (c *SessionConfig) ToArgs() []string {
+	args := make([]string, 0)
+
+	if c.ComputerName != "" {
+		args = append(args, "-ComputerName")
+		args = append(args, utils.QuoteArg(c.ComputerName))
+	}
+
+	if c.AllowRedirection {
+		args = append(args, "-AllowRedirection")
+	}
+
+	if c.Authentication != "" {
+		args = append(args, "-Authentication")
+		args = append(args, utils.QuoteArg(c.Authentication))
+	}
+
+	if c.CertificateThumbprint != "" {
+		args = append(args, "-CertificateThumbprint")
+		args = append(args, utils.QuoteArg(c.CertificateThumbprint))
+	}
+
+	if c.Port > 0 {
+		args = append(args, "-Port")
+		args = append(args, strconv.Itoa(c.Port))
+	}
+
+	if asserted, ok := c.Credential.(string); ok {
+		args = append(args, "-Credential")
+		args = append(args, asserted) // do not quote, as it contains a variable name when using password auth
+	}
+
+	if c.UseSSL {
+		args = append(args, "-UseSSL")
+	}
+
+	return args
+}
+
+type credential interface {
+	prepare(Middleware) (interface{}, error)
+}
+
+type UserPasswordCredential struct {
+	Username string
+	Password string
+}
+
+func (c *UserPasswordCredential) prepare(s Middleware) (interface{}, error) {
+	name := "goCred" + utils.CreateRandomString(8)
+	pwname := "goPass" + utils.CreateRandomString(8)
+
+	_, _, err := s.Execute(fmt.Sprintf("$%s = ConvertTo-SecureString -String %s -AsPlainText -Force", pwname, utils.QuoteArg(c.Password)))
+	if err != nil {
+		return nil, errors.Annotate(err, "Could not convert password to secure string")
+	}
+
+	_, _, err = s.Execute(fmt.Sprintf("$%s = New-Object -TypeName 'System.Management.Automation.PSCredential' -ArgumentList %s, $%s", name, utils.QuoteArg(c.Username), pwname))
+	if err != nil {
+		return nil, errors.Annotate(err, "Could not create PSCredential object")
+	}
+
+	return fmt.Sprintf("$%s", name), nil
+}