113 lines
3 KiB
Go
113 lines
3 KiB
Go
package datastructures
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"time"
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"git.cacert.org/cacert-gosigner/shared"
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)
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type SignerRequest struct {
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Version uint8
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Action shared.Action
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System shared.CryptoSystemId
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Root shared.CryptoSystemRootId
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Profile shared.CertificateProfileId
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MdAlgorithm shared.MessageDigestAlgorithmId
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Days uint16
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Spkac uint8
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Content1 []byte
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Content2 []byte
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Content3 []byte
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}
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func SignerRequestFromData(blockData []byte) (*SignerRequest, error) {
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headerLength := Decode24BitLength(blockData[0:3])
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headerBytes := blockData[3 : 3+headerLength]
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contentBytes := blockData[3+headerLength:]
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content1Length := Decode24BitLength(contentBytes[0:3])
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content1 := contentBytes[3 : 3+content1Length]
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content2Offset := 3 + content1Length
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content2Length := Decode24BitLength(contentBytes[content2Offset : content2Offset+3])
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content2 := contentBytes[3+content2Offset : 3+content2Offset+content2Length]
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content3Offset := 3 + content2Offset + content2Length
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content3Length := Decode24BitLength(contentBytes[content3Offset : content3Offset+3])
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content3 := contentBytes[3+content3Offset : 3+content3Offset+content3Length]
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return &SignerRequest{
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Version: headerBytes[0],
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Action: shared.Action(headerBytes[1]),
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System: shared.CryptoSystemId(headerBytes[2]),
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Root: shared.CryptoSystemRootId(headerBytes[3]),
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Profile: shared.CertificateProfileId(headerBytes[4]),
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MdAlgorithm: shared.MessageDigestAlgorithmId(headerBytes[5]),
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Days: binary.BigEndian.Uint16([]byte{headerBytes[6], headerBytes[7]}),
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Spkac: headerBytes[8],
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Content1: content1,
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Content2: content2,
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Content3: content3,
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}, nil
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}
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func (r *SignerRequest) Serialize() []byte {
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parameter2Bytes := make([]byte, 2)
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binary.BigEndian.PutUint16(parameter2Bytes, r.Days)
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headerBytes := bytes.Join([][]byte{
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{
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r.Version,
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byte(r.Action),
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byte(r.System),
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byte(r.Root),
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byte(r.Profile),
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byte(r.MdAlgorithm),
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},
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parameter2Bytes, {r.Spkac}}, []byte{})
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content1Bytes := r.Content1
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content2Bytes := r.Content2
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content3Bytes := r.Content3
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blockBytes := bytes.Join([][]byte{
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Encode24BitLength(headerBytes), headerBytes,
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Encode24BitLength(content1Bytes), content1Bytes,
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Encode24BitLength(content2Bytes), content2Bytes,
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Encode24BitLength(content3Bytes), content3Bytes,
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}, []byte{})
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return bytes.Join([][]byte{Encode24BitLength(blockBytes), blockBytes}, []byte{})
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}
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func (r *SignerRequest) String() string {
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return fmt.Sprintf(
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"v:%d %s s:%d r:%d p:%d md:%d days:%d spkac:%d '%s' '%s' '%s'",
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r.Version,
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r.Action,
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r.System,
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r.Root,
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r.Profile,
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r.MdAlgorithm,
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r.Days,
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r.Spkac,
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shorten(r.Content1),
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shorten(r.Content2),
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shorten(r.Content3),
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)
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}
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func shorten(original []byte) []byte {
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if len(original) > 20 {
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return original[:20]
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}
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return original
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}
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func NewNulRequest() *SignerRequest {
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return &SignerRequest{
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Version: shared.ProtocolVersion,
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Action: shared.ActionNul,
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Content1: []byte(time.Now().UTC().Format(signerTimeFormat)),
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}
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}
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