This PR adds ldap authentication support for mcs based on
https://github.com/minio/minio/blob/master/docs/sts/ldap.md
How to test:
```
$ docker run --rm -p 389:389 -p 636:636 --name my-openldap-container
--detach osixia/openldap:1.3.0
```
Run the `billy.ldif` file using `ldapadd` command to create a new user
and assign it to a group.
```
$ cat > billy.ldif << EOF
dn: uid=billy,dc=example,dc=org
uid: billy
cn: billy
sn: 3
objectClass: top
objectClass: posixAccount
objectClass: inetOrgPerson
loginShell: /bin/bash
homeDirectory: /home/billy
uidNumber: 14583102
gidNumber: 14564100
userPassword: {SSHA}j3lBh1Seqe4rqF1+NuWmjhvtAni1JC5A
mail: billy@example.org
gecos: Billy User
dn: ou=groups,dc=example,dc=org
objectclass:organizationalunit
ou: groups
description: generic groups branch
of s3::*)
dn: cn=mcsAdmin,ou=groups,dc=example,dc=org
objectClass: top
objectClass: posixGroup
gidNumber: 678
dn: cn=mcsAdmin,ou=groups,dc=example,dc=org
changetype: modify
add: memberuid
memberuid: billy
EOF
$ docker cp billy.ldif
my-openldap-container:/container/service/slapd/assets/test/billy.ldif
$ docker exec my-openldap-container ldapadd -x -D
"cn=admin,dc=example,dc=org" -w admin -f
/container/service/slapd/assets/test/billy.ldif -H ldap://localhost -ZZ
```
Query the ldap server to check the user billy was created correctly and
got assigned to the mcsAdmin group, you should get a list
containing ldap users and groups.
```
$ docker exec my-openldap-container ldapsearch -x -H ldap://localhost -b
dc=example,dc=org -D "cn=admin,dc=example,dc=org" -w admin
```
Query the ldap server again, this time filtering only for the user
`billy`, you should see only 1 record.
```
$ docker exec my-openldap-container ldapsearch -x -H ldap://localhost -b
uid=billy,dc=example,dc=org -D "cn=admin,dc=example,dc=org" -w admin
```
Change the password for user billy
Set the new password for `billy` to `minio123` and enter `admin` as the
default `LDAP Password`
```
$ docker exec -it my-openldap-container /bin/bash
ldappasswd -H ldap://localhost -x -D "cn=admin,dc=example,dc=org" -W
-S "uid=billy,dc=example,dc=org"
New password:
Re-enter new password:
Enter LDAP Password:
```
Add the mcsAdmin policy to user billy on MinIO
```
$ cat > mcsAdmin.json << EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"admin:*"
],
"Effect": "Allow",
"Sid": ""
},
{
"Action": [
"s3:*"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::*"
],
"Sid": ""
}
]
}
EOF
$ mc admin policy add myminio mcsAdmin mcsAdmin.json
$ mc admin policy set myminio mcsAdmin user=billy
```
Run MinIO
```
export MINIO_ACCESS_KEY=minio
export MINIO_SECRET_KEY=minio123
export MINIO_IDENTITY_LDAP_SERVER_ADDR='localhost:389'
export MINIO_IDENTITY_LDAP_USERNAME_FORMAT='uid=%s,dc=example,dc=org'
export
MINIO_IDENTITY_LDAP_USERNAME_SEARCH_FILTER='(|(objectclass=posixAccount)(uid=%s))'
export MINIO_IDENTITY_LDAP_TLS_SKIP_VERIFY=on
export MINIO_IDENTITY_LDAP_SERVER_INSECURE=on
./minio server ~/Data
```
Run MCS
```
export MCS_ACCESS_KEY=minio
export MCS_SECRET_KEY=minio123
...
export MCS_LDAP_ENABLED=on
./mcs server
```
