S3 授权

限制对特定 HTTP 引用站点的访问

{
"Version":"2012-10-17",
"Id":"http referer policy example",
"Statement":[
{
"Sid":"Allow get requests originating from www.example.com and example.com.",
"Effect":"Allow",
"Principal":"*",
"Action":"s3:GetObject",
"Resource":"arn:aws:s3:::examplebucket/*",
"Condition":{
"StringLike":{"aws:Referer":["http://www.example.com/*","http://example.com/*"]}
}
}
]
}

添加存储桶策略以请求 MFA

{
"Version": "2012-10-17",
"Id": "123",
"Statement": [
{
"Sid": "",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::examplebucket/taxdocuments/*",
"Condition": { "Null": { "aws:MultiFactorAuthAge": true }}
}
]
}

向 Amazon CloudFront Origin Identity 授予权限

{
"Version":"2012-10-17",
"Id":"PolicyForCloudFrontPrivateContent",
"Statement":[
{
"Sid":" Grant a CloudFront Origin Identity access to support private content",
"Effect":"Allow",
"Principal":{"CanonicalUser":"CloudFront Origin Identity Canonical User ID"},
"Action":"s3:GetObject",
"Resource":"arn:aws:s3:::examplebucket/*"
}
]
}

您可以选择使用数值条件限制 aws:MultiFactorAuthAge 密钥的有效期，该期限独立于对请求进行身份验证时使用的临时安全凭证的生存期。例如，除了要求 MFA 身份验证外，下面的存储桶策略还会查看临时会话是在多久以前创建的。如果 aws:MultiFactorAuthAge 键值指示临时会话是在一个小时 (3600 秒) 之前创建的，则策略将拒绝任何操作。

{
"Version": "2012-10-17",
"Id": "123",
"Statement": [
{
"Sid": "",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::examplebucket/taxdocuments/*",
"Condition": {"Null": {"aws:MultiFactorAuthAge": true }}
},
{
"Sid": "",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::examplebucket/taxdocuments/*",
"Condition": {"NumericGreaterThan": {"aws:MultiFactorAuthAge": 3600 }}
},
{
"Sid": "",
"Effect": "Allow",
"Principal": "*",
"Action": ["s3:GetObject"],
"Resource": "arn:aws:s3:::examplebucket/*"
}
]
}