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admin-policy-update.go
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admin-policy-update.go
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"errors"
"fmt"
"strings"
"github.com/fatih/color"
"github.com/minio/cli"
"github.com/minio/mc/pkg/probe"
"github.com/minio/pkg/console"
)
var adminPolicyUpdateCmd = cli.Command{
Name: "update",
Usage: "attach a new IAM policy to user or group",
Action: mainAdminPolicyUpdate,
OnUsageError: onUsageError,
Before: setGlobalsFromContext,
Flags: globalFlags,
CustomHelpTemplate: `NAME:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}} TARGET POLICYNAME [ user=username1 | group=groupname1 ]
POLICYNAME:
Name of the policy on the MinIO server.
FLAGS:
{{range .VisibleFlags}}{{.}}
{{end}}
EXAMPLES:
1. Add the "diagnostics" policy for user "james".
{{.Prompt}} {{.HelpName}} myminio diagnostics user=james
2. Add the "diagnostics" policy for group "auditors".
{{.Prompt}} {{.HelpName}} myminio diagnostics group=auditors
`,
}
func checkAdminPolicyUpdateSyntax(ctx *cli.Context) {
if len(ctx.Args()) != 3 {
cli.ShowCommandHelpAndExit(ctx, "update", 1) // last argument is exit code
}
}
func updateCannedPolicies(existingPolicies, policiesToAdd string) (string, error) {
policiesToAdd = strings.TrimSpace(policiesToAdd)
if policiesToAdd == "" {
return "", errors.New("empty policy name is unsupported")
}
var updatedPolicies []string
if existingPolicies != "" {
updatedPolicies = strings.Split(existingPolicies, ",")
}
for _, p1 := range strings.Split(policiesToAdd, ",") {
found := false
p1 = strings.TrimSpace(p1)
for _, p2 := range updatedPolicies {
if p1 == p2 {
found = true
break
}
}
if found {
return "", fmt.Errorf("policy `%s` already exists", p1)
}
updatedPolicies = append(updatedPolicies, p1)
}
return strings.Join(updatedPolicies, ","), nil
}
// mainAdminPolicyUpdate is the handler for "mc admin policy update" command.
func mainAdminPolicyUpdate(ctx *cli.Context) error {
checkAdminPolicyUpdateSyntax(ctx)
console.SetColor("PolicyMessage", color.New(color.FgGreen))
console.SetColor("Policy", color.New(color.FgBlue))
// Get the alias parameter from cli
args := ctx.Args()
aliasedURL := args.Get(0)
policiesToAdd := args.Get(1)
entityArg := args.Get(2)
userOrGroup, isGroup, e1 := parseEntityArg(entityArg)
fatalIf(probe.NewError(e1).Trace(args...), "Bad last argument")
// Create a new MinIO Admin Client
client, err := newAdminClient(aliasedURL)
fatalIf(err, "Unable to initialize admin connection.")
var existingPolicies string
if !isGroup {
userInfo, e := client.GetUserInfo(globalContext, userOrGroup)
fatalIf(probe.NewError(e).Trace(args...), "Unable to get user policy info")
existingPolicies = userInfo.PolicyName
} else {
groupInfo, e := client.GetGroupDescription(globalContext, userOrGroup)
fatalIf(probe.NewError(e).Trace(args...), "Unable to get group policy info")
existingPolicies = groupInfo.Policy
}
updatedPolicies, e := updateCannedPolicies(existingPolicies, policiesToAdd)
if e != nil {
fatalIf(probe.NewError(e).Trace(args...), "Unable to update the policy")
}
e = client.SetPolicy(globalContext, updatedPolicies, userOrGroup, isGroup)
if e == nil {
printMsg(userPolicyMessage{
op: "update",
Policy: policiesToAdd,
UserOrGroup: userOrGroup,
IsGroup: isGroup,
})
} else {
fatalIf(probe.NewError(e), "Unable to unset the policy")
}
return nil
}