{
   "Version":"2012-10-17",
   "Id":"PutObjectPolicy",
   "Statement":[{
         "Sid":"DenyObjectsThatAreNotSSEKMS",
         "Effect":"Deny",
         "Principal":"*",
         "Action":"s3:PutObject",
         "Resource":"arn:aws:s3:::multi-key-poc/*",
         "Condition":{
            "Null":{
               "s3:x-amz-server-side-encryption-aws-kms-key-id":"true"
            }
         }
      }
   ]

{
   "Version":"2012-10-17",
   "Id":"PutObjectPolicy1",
   "Statement":[{
         "Sid":"DenyObjectsWithInvalidSSEKMS",
         "Effect":"Deny",
         "Principal":"*",
         "Action":"s3:PutObject",
         "Resource":"arn:aws:s3:::multi-key-poc/*",
         "Condition":{
            "StringNotEquals":{
               "s3:x-amz-server-side-encryption-aws-kms-key-id":"minio-default-key"
            }
         }
      }
   ]

mc admin user add myminio/ minio123 minio123

mc admin policy create myminio/ deny-non-sse-kms-pol ./docs/iam/policies/deny-non-sse-kms-objects.json
mc admin policy create myminio/ deny-invalid-sse-kms-pol ./docs/iam/policies/deny-objects-with-invalid-sse-kms-key-id.json

mc admin policy attach myminio deny-non-sse-kms-pol --user minio123
mc admin policy attach myminio deny-invalid-sse-kms-pol --user minio123

 * the operation and the desired access bits are compared to the SID
 * and access mask of each ACE. If the SID matches, the allow/deny flags
 * and access mask are considered. If the ACE is a "deny"
 * ACE and <i>any</i> of the desired access bits match bits in the access
 * mask of the ACE, the whole access check fails. If the ACE is an "allow"

 * the operation and the desired access bits are compared to the SID
 * and access mask of each ACE. If the SID matches, the allow/deny flags
 * and access mask are considered. If the ACE is a "deny"
 * ACE and <i>any</i> of the desired access bits match bits in the access
 * mask of the ACE, the whole access check fails. If the ACE is an "allow"

 * the operation and the desired access bits are compared to the SID
 * and access mask of each ACE. If the SID matches, the allow/deny flags
 * and access mask are considered. If the ACE is a "deny"
 * ACE and <i>any</i> of the desired access bits match bits in the access
 * mask of the ACE, the whole access check fails. If the ACE is an "allow"

        assertNotNull(ace.getSID());
    }

    @Test
    @DisplayName("Test decode with deny ACE")
    void testDecodeDenyACE() throws Exception {
        // Prepare test data - Deny ACE
        testBuffer = new byte[100];
        testBuffer[0] = 0x01; // Deny ACE (non-zero)
        testBuffer[1] = 0x10; // FLAGS_INHERITED
        testBuffer[2] = 0x24; // Size low byte (36)

    protected String userPrefix = "{user}";

    /** Prefix used to identify allow permissions */
    protected String allowPrefix = "(allow)";

    /** Prefix used to identify deny permissions */
    protected String denyPrefix = "(deny)";

    /** System helper for user/group/role search operations */
    @Resource
    protected SystemHelper systemHelper;

    /**
     * Default constructor for PermissionHelper.

    jvmArgumentProviders.add(CommandLineArgumentProvider {
        val testVersion = testVersionProvider.get()
        if (testVersion.canCompileOrRun(9) && !testVersion.canCompileOrRun(17)) {
            listOf("--illegal-access=deny")
        } else {
            emptyList()
        }
    })
    useJUnitPlatform()

MinIO supports multiple admin users in addition to default operator credential created during server startup. New admins can be added after server starts up, and server can be configured to deny or allow access to different admin operations for these users. This document explains how to add/remove admin users and modify their access rights.

## Get started