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// {{{ Copyright (c) Paul R. Tagliamonte <paultag@gmail.com>, 2017
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE. }}}
package bytearray
import (
"encoding/asn1"
)
// Decode will unpack a byte array of DER encoded byte arrays into
// asn1.RawValue structs.
func Decode(bytes []byte) ([]asn1.RawValue, error) {
ret := []asn1.RawValue{}
for {
rawData := asn1.RawValue{}
rest, err := asn1.Unmarshal(bytes, &rawData)
if err != nil {
return nil, err
}
ret = append(ret, rawData)
if len(rest) == 0 {
break
}
bytes = rest
}
return ret, nil
}
// This will DER unpack a byte array, and Decode the nested Byte array
// that sits underneath it.
func DERDecode(bytes []byte) ([]asn1.RawValue, error) {
rawData := asn1.RawValue{}
if _, err := asn1.Unmarshal(bytes, &rawData); err != nil {
return nil, err
}
return Decode(rawData.Bytes)
}
// Take a list of asn1.RawValue structs, Marshal them, and push the combined
// array into a byte array to drop out.
func Encode(values []asn1.RawValue) ([]byte, error) {
ret := []byte{}
for _, value := range values {
bytes, err := asn1.Marshal(value)
if err != nil {
return nil, err
}
ret = append(ret, bytes...)
}
return ret, nil
}
// vim: foldmethod=marker
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