85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
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package s3
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import (
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"crypto/md5"
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"encoding/base64"
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"net/http"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/request"
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)
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var errSSERequiresSSL = awserr.New("ConfigError", "cannot send SSE keys over HTTP.", nil)
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func validateSSERequiresSSL(r *request.Request) {
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if r.HTTPRequest.URL.Scheme == "https" {
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return
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}
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if iface, ok := r.Params.(sseCustomerKeyGetter); ok {
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if len(iface.getSSECustomerKey()) > 0 {
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r.Error = errSSERequiresSSL
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return
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}
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}
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if iface, ok := r.Params.(copySourceSSECustomerKeyGetter); ok {
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if len(iface.getCopySourceSSECustomerKey()) > 0 {
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r.Error = errSSERequiresSSL
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return
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}
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}
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}
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const (
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sseKeyHeader = "x-amz-server-side-encryption-customer-key"
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sseKeyMD5Header = sseKeyHeader + "-md5"
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)
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func computeSSEKeyMD5(r *request.Request) {
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var key string
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if g, ok := r.Params.(sseCustomerKeyGetter); ok {
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key = g.getSSECustomerKey()
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}
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computeKeyMD5(sseKeyHeader, sseKeyMD5Header, key, r.HTTPRequest)
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}
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const (
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copySrcSSEKeyHeader = "x-amz-copy-source-server-side-encryption-customer-key"
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copySrcSSEKeyMD5Header = copySrcSSEKeyHeader + "-md5"
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)
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func computeCopySourceSSEKeyMD5(r *request.Request) {
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var key string
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if g, ok := r.Params.(copySourceSSECustomerKeyGetter); ok {
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key = g.getCopySourceSSECustomerKey()
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}
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computeKeyMD5(copySrcSSEKeyHeader, copySrcSSEKeyMD5Header, key, r.HTTPRequest)
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}
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func computeKeyMD5(keyHeader, keyMD5Header, key string, r *http.Request) {
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if len(key) == 0 {
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// Backwards compatiablity where user just set the header value instead
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// of using the API parameter, or setting the header value for an
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// operation without the parameters modeled.
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key = r.Header.Get(keyHeader)
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if len(key) == 0 {
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return
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}
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// In backwards compatiable, the header's value is not base64 encoded,
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// and needs to be encoded and updated by the SDK's customizations.
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b64Key := base64.StdEncoding.EncodeToString([]byte(key))
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r.Header.Set(keyHeader, b64Key)
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}
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// Only update Key's MD5 if not already set.
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if len(r.Header.Get(keyMD5Header)) == 0 {
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sum := md5.Sum([]byte(key))
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keyMD5 := base64.StdEncoding.EncodeToString(sum[:])
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r.Header.Set(keyMD5Header, keyMD5)
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}
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}
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