RAM Policy是基于用户的授权策略。您可以使用RAM Policy控制用户可以访问您名下哪些资源的权限。

背景信息

  • RAM Policy语法和结构

    RAM Policy包含版本号(Version)、授权语句(Statement)、每条授权语句包括授权效力(Effect)、操作(Action)、资源(Resource)以及限制条件(Condition,可选项)。有关权限策略的语法和结构的详情,请参见权限策略语法和结构

    其中OSS中Version、Statement以及Effect的应用规则与RAM相同。OSS的Action、Resource以及Condition说明请参见:

  • OSS常用的权限策略
    • AliyunOSSFullAccess:为RAM用户授予OSS的完全管理权限。
    • AliyunOSSReadOnlyAccess:为RAM用户授予OSS的只读访问权限。
  • OSS访问控制方式

    有关OSS包含的访问控制方式的更多信息,请参见访问控制概述

OSS Action分类

Action分为Service级别操作、Bucket级别操作以及Object级别的操作。各API接口功能描述的更多信息,请参见API概览

  • Service级别

    Service级别操作对应的是GetService (ListBuckets)接口,用来列举所有属于该用户的Bucket列表。

    API Action
    GetService (ListBuckets) oss:ListBuckets
  • Bucket级别

    操作的对象均为Bucket,其Action名称和相应的接口名称一一对应。

    API Action
    PutBucket oss:PutBucket
    GetBucket (ListObjects) oss:ListObjects
    GetBucketVersions (ListObjectVersions) oss:ListObjectVersions
    PutBucketVersioning oss:PutBucketVersioning
    GetBucketVersioning oss:GetBucketVersioning
    PutBucketAcl oss:PutBucketAcl
    GetBucketAcl oss:GetBucketAcl
    DeleteBucket oss:DeleteBucket
    GetBucketLocation oss:GetBucketLocation
    GetBucketInfo oss:GetBucketInfo
    GetBucketLogging oss:GetBucketLogging
    PutBucketLogging oss:PutBucketLogging
    DeleteBucketLogging oss:DeleteBucketLogging
    GetBucketWebsite oss:GetBucketWebsite
    PutBucketWebsite oss:PutBucketWebsite
    DeleteBucketWebsite oss:DeleteBucketWebsite
    GetBucketReferer oss:GetBucketReferer
    PutBucketReferer oss:PutBucketReferer
    GetBucketLifecycle oss:GetBucketLifecycle
    PutBucketLifecycle oss:PutBucketLifecycle
    DeleteBucketLifecycle oss:DeleteBucketLifecycle
    ListMultipartUploads oss:ListMultipartUploads
    PutBucketCors oss:PutBucketCors
    GetBucketCors oss:GetBucketCors
    DeleteBucketCors oss:DeleteBucketCors
    PutBucketPolicy oss:PutBucketPolicy
    GetBucketPolicy oss:GetBucketPolicy
    DeleteBucketPolicy oss:DeleteBucketPolicy
    PutBucketTags oss:PutBucketTagging
    GetBucketTags oss:GetBucketTagging
    DeleteBucketTags oss:DeleteBucketTagging
    PutBucketEncryption oss:PutBucketEncryption
    GetBucketEncryption oss:GetBucketEncryption
    DeleteBucketEncryption oss:DeleteBucketEncryption
    PutBucketRequestPayment oss:PutBucketRequestPayment
    GetBucketRequestPayment oss:GetBucketRequestPayment
    PutBucketReplication oss:PutBucketReplication
    GetBucketReplication oss:GetBucketReplication
    DeleteBucketReplication oss:DeleteBucketReplication
    GetBucketReplicationLocation oss:GetBucketReplicationLocation
    GetBucketReplicationProgress oss:GetBucketReplicationProgress
  • Object级别

    操作对象均为Object,各Action名称与接口的对应关系如下所示。

    API Action
    PutObject oss:PutObject
    PostObject
    InitiateMultipartUpload
    UploadPart
    CompleteMultipart
    AppendObject
    CompleteMultipartUpload
    PutSymlink
    GetObject oss:GetObject
    HeadObject
    GetObjectMeta
    SelectObject
    GetSymlink
    DeleteObject oss:DeleteObject
    DeleteMultipleObjects
    CopyObject oss:GetObject,oss:PutObject
    UploadPartCopy
    ListParts oss:ListParts
    GetObjectAcl oss:GetObjectAcl
    PutObjectAcl oss:PutObjectAcl
    RestoreObject oss:RestoreObject
    PutObjectTagging oss:PutObjectTagging
    GetObjectTagging oss:GetObjectTagging
    DeleteObjectTagging oss:DeleteObjectTagging
    GetObject(请求参数中指定versionId) oss:GetObjectVersion
    PutObjectACL(请求参数中指定versionId) oss:PutObjectVersionAcl
    GetObjectAcl(请求参数中指定versionId) oss:GetObjectVersionAcl
    RestoreObject(请求参数中指定versionId) oss:RestoreObjectVersion
    DeleteObject(请求参数中指定versionId) oss:DeleteObjectVersion
    PutObjectTagging(请求参数中指定versionId) oss:PutObjectVersionTagging
    GetObjectTagging(请求参数中指定versionId) oss:GetObjectVersionTagging
    DeleteObjectTagging(请求参数中指定versionId) oss:DeleteObjectVersionTagging
    PutLiveChannel oss:PutLiveChannel
    ListLiveChannel oss:ListLiveChannel
    DeleteLiveChannel oss:DeleteLiveChannel
    PutLiveChannelStatus oss:PutLiveChannelStatus
    GetLiveChannelInfo oss:GetLiveChannel
    GetLiveChannelStat oss:GetLiveChannelStat
    GetLiveChannelHistory oss:GetLiveChannelHistory
    PostVodPlaylist oss:PostVodPlaylist
    GetVodPlaylist oss:GetVodPlaylist
    ProcessImm oss:ProcessImm
    ImgSaveAs oss:PostProcessTask
    AbortMultipartUpload oss:AbortMultipartUpload

OSS Resource说明

在OSS中,Resource指代某个具体资源或者某些资源,支持通配符星号(*)。单个RAM Policy允许包含多个Resource。

Resource规则:acs:oss:{region}:{bucket_owner}:{bucket_name}/{object_name}

针对Bucket级别的Resource设置,不需要在{bucket_name}之后添加正斜线(/)以及{object_name},即acs:oss:{region}:{bucket_owner}:{bucket_name}。region字段当前仅支持设置为通配符星号(*)。

OSS Condition说明

Condition代表Policy授权的条件。OSS支持的Condition如下:

Condition 说明
acs:SourceIp 指定普通IP网段,支持通配符星号(*)。
acs:UserAgent 指定HTTP User-Agent头。

类型:字符串

acs:CurrentTime 请求到达OSS服务端的时间。

格式:ISO8601

acs:SecureTransport 请求的协议类型。如果请求是HTTP协议,则为HTTP,如果请求是HTTPS协议,则为HTTPS。
oss:Prefix 用于ListObjects请求时,列举指定前缀的Object。
oss:Delimiter 用于ListObjects请求时,对Object名字进行分组的字符。
acs:AccessId 请求中携带的AccessId。
oss:BucketTag 存储空间标签(BucketTag)。

单个BucketTag可以作为一个Condition。当设置多个BucketTag时,需在每个BucketTag前加上oss:BucketTag/,组成多个Condition。

acs:MFAPresent 是否启用了多因素认证MFA(Multi-factor authentication)。
取值:
  • true:已启用多因素认证。
  • false:未启用多因素认证。
oss:ExistingObjectTag 请求的Object已存在标签。

单个ObjectTag可以作为一个Condition。当设置多个ObjectTag时,需在每个ObjectTag前加上oss:ExistingObjectTag/,组成多个Condition。

主要针对GetObjectHeadObject等读取文件接口以及PutObjectTaggingGetObjectTagging等ObjectTagging接口。

oss:RequestObjectTag 请求中携带的对象标签。

单个ObjectTag可以作为一个Condition。当设置多个ObjectTag时,需在每个ObjectTag前加上oss:RequestObjectTag/,组成多个Condition。

主要针对PutObjectPostObject等写入文件接口以及PutObjectTaggingGetObjectTagging等ObjectTagging接口。

常见示例

您可以使用RAM Policy实现不同场景下的用户权限策略。更多信息,请参见RAM Policy常见示例