106 lines
3.3 KiB
Go
106 lines
3.3 KiB
Go
package dockerfile // import "github.com/docker/docker/builder/dockerfile"
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import (
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"bytes"
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"context"
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"os"
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"path/filepath"
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"strings"
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"github.com/containerd/containerd/platforms"
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"github.com/docker/docker/api/types/container"
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"github.com/docker/docker/api/types/mount"
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"github.com/docker/docker/pkg/idtools"
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"github.com/docker/docker/pkg/jsonmessage"
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"golang.org/x/sys/windows"
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)
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func parseChownFlag(ctx context.Context, builder *Builder, state *dispatchState, chown, ctrRootPath string, identityMapping idtools.IdentityMapping) (idtools.Identity, error) {
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if builder.options.Platform == "windows" {
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return getAccountIdentity(ctx, builder, chown, ctrRootPath, state)
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}
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return identityMapping.RootPair(), nil
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}
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func getAccountIdentity(ctx context.Context, builder *Builder, accountName string, ctrRootPath string, state *dispatchState) (idtools.Identity, error) {
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// If this is potentially a string SID then attempt to convert it to verify
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// this, otherwise continue looking for the account.
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if strings.HasPrefix(accountName, "S-") || strings.HasPrefix(accountName, "s-") {
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sid, err := windows.StringToSid(accountName)
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if err == nil {
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return idtools.Identity{SID: sid.String()}, nil
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}
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}
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// Attempt to obtain the SID using the name.
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sid, _, accType, err := windows.LookupSID("", accountName)
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// If this is a SID that is built-in and hence the same across all systems then use that.
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if err == nil && (accType == windows.SidTypeAlias || accType == windows.SidTypeWellKnownGroup) {
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return idtools.Identity{SID: sid.String()}, nil
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}
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// Check if the account name is one unique to containers.
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if strings.EqualFold(accountName, "ContainerAdministrator") {
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return idtools.Identity{SID: idtools.ContainerAdministratorSidString}, nil
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} else if strings.EqualFold(accountName, "ContainerUser") {
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return idtools.Identity{SID: idtools.ContainerUserSidString}, nil
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}
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// All other lookups failed, so therefore determine if the account in
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// question exists in the container and if so, obtain its SID.
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return lookupNTAccount(ctx, builder, accountName, state)
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}
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func lookupNTAccount(ctx context.Context, builder *Builder, accountName string, state *dispatchState) (idtools.Identity, error) {
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source, _ := filepath.Split(os.Args[0])
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target := "C:\\Docker"
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targetExecutable := target + "\\containerutility.exe"
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optionsPlatform, err := platforms.Parse(builder.options.Platform)
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if err != nil {
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return idtools.Identity{}, err
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}
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runConfig := copyRunConfig(state.runConfig,
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withCmdCommentString("internal run to obtain NT account information.", optionsPlatform.OS))
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runConfig.Cmd = []string{targetExecutable, "getaccountsid", accountName}
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hostConfig := &container.HostConfig{Mounts: []mount.Mount{
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{
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Type: mount.TypeBind,
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Source: source,
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Target: target,
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ReadOnly: true,
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},
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},
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}
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container, err := builder.containerManager.Create(ctx, runConfig, hostConfig)
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if err != nil {
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return idtools.Identity{}, err
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}
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stdout := new(bytes.Buffer)
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stderr := new(bytes.Buffer)
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if err := builder.containerManager.Run(ctx, container.ID, stdout, stderr); err != nil {
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if err, ok := err.(*statusCodeError); ok {
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return idtools.Identity{}, &jsonmessage.JSONError{
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Message: stderr.String(),
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Code: err.StatusCode(),
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}
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}
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return idtools.Identity{}, err
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}
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accountSid := stdout.String()
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return idtools.Identity{SID: accountSid}, nil
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}
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