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50 lines
1.6 KiB
50 lines
1.6 KiB
6 years ago
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// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package crypto
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import (
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"net/http"
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)
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// SSEHeader is the general AWS SSE HTTP header key.
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const SSEHeader = "X-Amz-Server-Side-Encryption"
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// SSEAlgorithmAES256 is the only supported value for the SSE-S3 or SSE-C algorithm header.
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// For SSE-S3 see: https://docs.aws.amazon.com/AmazonS3/latest/dev/SSEUsingRESTAPI.html
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// For SSE-C see: https://docs.aws.amazon.com/AmazonS3/latest/dev/ServerSideEncryptionCustomerKeys.html
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const SSEAlgorithmAES256 = "AES256"
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// S3 represents AWS SSE-S3. It provides functionality to handle
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// SSE-S3 requests.
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var S3 = s3{}
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type s3 struct{}
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// IsRequested returns true if the HTTP headers indicates that
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// the S3 client requests SSE-S3.
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func (s3) IsRequested(h http.Header) bool {
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_, ok := h[SSEHeader]
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return ok
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}
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// Parse parses the SSE-S3 related HTTP headers and checks
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// whether they contain valid values.
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func (s3) Parse(h http.Header) (err error) {
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if h.Get(SSEHeader) != SSEAlgorithmAES256 {
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err = ErrInvalidEncryptionMethod
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}
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return
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}
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