Managing Bucket ACLs

Access control lists (ACLs) allow resource owners to grant other accounts the permissions to access resources. By default, only the resource owner has full control over resources when a bucket or object is created. That is, the bucket creator has full control over the bucket, and the object uploader has full control over the object. Other accounts do not have the permissions to access resources. If resource owners want to grant other accounts the read and write permissions on resources, they can use ACLs. ACLs grant permissions to accounts. After an account is granted permissions, both the account and its IAM users can access the resources.

For more information, see ACLs.

A bucket ACL can be configured in any of the following ways:

1. Specify a pre-defined ACL when creating a bucket.
2. Call OBSSetBucketACLWithCannedACLRequest to specify a pre-defined ACL.
3. Call OBSSetBucketACLWithPolicyRequest to specify a user-defined ACL.

OBS supports five types of bucket or object ACLs. For details, see the following table:

There are five access control policies pre-defined in OBS, as described in the following table:

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
char* ak_env = getenv("AccessKeyID");
char* sk_env = getenv("SecretAccessKey");
NSString *AK = [NSString stringWithUTF8String:ak_env];
NSString *SK = [NSString stringWithUTF8String:sk_env];

// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
//Create a bucket.
OBSCreateBucketRequest *request = [[OBSCreateBucketRequest alloc] initWithBucketName:@"bucketname"];
// Set the ACL to public read and write.
request.bucketACLPolicy = OBSACLPolicyPublicReadWrite;
    
[client createBucket:request completionHandler:^(OBSCreateBucketResponse *response, NSError *error) {
    NSLog(@"%@",response.location);
}];

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
char* ak_env = getenv("AccessKeyID");
char* sk_env = getenv("SecretAccessKey");
NSString *AK = [NSString stringWithUTF8String:ak_env];
NSString *SK = [NSString stringWithUTF8String:sk_env];

// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
//Set the pre-defined ACL to public read and private write.
OBSSetBucketACLWithCannedACLRequest *request = [[OBSSetBucketACLWithCannedACLRequest alloc]initWithBucketName:@"bucketname" cannedACL:OBSACLPolicyPublicRead];
[client setBucketACL:request completionHandler:^(OBSSetBucketACLResponse *response, NSError *error){
    NSLog(@"%@",response);
}];

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
char* ak_env = getenv("AccessKeyID");
char* sk_env = getenv("SecretAccessKey");
NSString *AK = [NSString stringWithUTF8String:ak_env];
NSString *SK = [NSString stringWithUTF8String:sk_env];

// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Initialize an instance of OBSUser.
OBSUser *owner = [[OBSUser alloc] initWithID:@"ownerID"];
// Set a grantee.
OBSACLGranteeUser *grantee = [[OBSACLGranteeUser alloc]initWithID:@"granteeID"];
// Grant the FULL_CONTROL permission to the grantee.
OBSACLGrant *grant = [[OBSACLGrant alloc]initWithGrantee:grantee permission:OBSACLFull_Control];
    
// Create a policy object.
OBSAccessControlPolicy *policy = [OBSAccessControlPolicy new];
policy.owner = owner;
[policy.accessControlList addObject:grant];
    
// Set the bucket ACL.
OBSSetBucketACLWithPolicyRequest *request = [[OBSSetBucketACLWithPolicyRequest alloc]initWithBucketName:@"bucketname" accessControlPolicy:policy];
[client setBucketACL:request completionHandler:^(OBSSetBucketACLResponse *response, NSError *error){
    NSLog(@"%@",response);
}];

• The owner or grantee ID needed in the ACL indicates the account ID, which can be viewed on the My Credentials page of OBS Console.

static OBSClient *client;
NSString *endPoint = @"your-endpoint";

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
char* ak_env = getenv("AccessKeyID");
char* sk_env = getenv("SecretAccessKey");
NSString *AK = [NSString stringWithUTF8String:ak_env];
NSString *SK = [NSString stringWithUTF8String:sk_env];

// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
    
// Obtain the bucket ACL.
OBSGetBucketACLRequest *request = [[OBSGetBucketACLRequest alloc] initWithBucketName:@"bucketname"];
[client getBucketACL:request completionHandler:^(OBSGetBucketACLResponse *response, NSError *error){
    NSLog(@"%@",response);
}];