forked from sassoftware/relic
/
microsoft.go
67 lines (60 loc) · 1.9 KB
/
microsoft.go
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//
// Copyright (c) SAS Institute Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package pkcs9
import (
"bytes"
"encoding/asn1"
"encoding/base64"
"net/http"
"github.com/sassoftware/relic/lib/pkcs7"
)
// Microsoft non-RFC-3161 timestamping
// https://msdn.microsoft.com/en-us/library/windows/desktop/bb931395(v=vs.85).aspx
type MicrosoftTimeStampRequest struct {
CounterSignatureType asn1.ObjectIdentifier
Attributes struct{} `asn1:"optional"`
Content struct {
ContentType asn1.ObjectIdentifier
Content []byte `asn1:"explicit,tag:0"`
}
}
func NewLegacyRequest(url string, encryptedDigest []byte) (*http.Request, error) {
var msg MicrosoftTimeStampRequest
msg.CounterSignatureType = OidSpcTimeStampRequest
msg.Content.ContentType = pkcs7.OidData
msg.Content.Content = encryptedDigest
blob, err := asn1.Marshal(msg)
if err != nil {
return nil, err
}
req, err := http.NewRequest("POST", url, bytes.NewReader(blob))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/octet-stream")
return req, nil
}
func ParseLegacyResponse(body []byte) (*pkcs7.ContentInfoSignedData, error) {
rblob, err := base64.StdEncoding.DecodeString(string(bytes.TrimRight(body, "\x00")))
if err != nil {
return nil, err
}
psd := new(pkcs7.ContentInfoSignedData)
if _, err := asn1.Unmarshal(rblob, psd); err != nil {
return nil, err
}
return psd, nil
}