52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package jose
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import (
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"fmt"
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"strings"
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)
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type JWS struct {
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RawHeader string
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Header JOSEHeader
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RawPayload string
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Payload []byte
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Signature []byte
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}
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// Given a raw encoded JWS token parses it and verifies the structure.
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func ParseJWS(raw string) (JWS, error) {
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parts := strings.Split(raw, ".")
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if len(parts) != 3 {
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return JWS{}, fmt.Errorf("malformed JWS, only %d segments", len(parts))
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}
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rawSig := parts[2]
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jws := JWS{
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RawHeader: parts[0],
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RawPayload: parts[1],
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}
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header, err := decodeHeader(jws.RawHeader)
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if err != nil {
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return JWS{}, fmt.Errorf("malformed JWS, unable to decode header, %s", err)
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}
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if err = header.Validate(); err != nil {
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return JWS{}, fmt.Errorf("malformed JWS, %s", err)
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}
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jws.Header = header
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payload, err := decodeSegment(jws.RawPayload)
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if err != nil {
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return JWS{}, fmt.Errorf("malformed JWS, unable to decode payload: %s", err)
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}
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jws.Payload = payload
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sig, err := decodeSegment(rawSig)
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if err != nil {
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return JWS{}, fmt.Errorf("malformed JWS, unable to decode signature: %s", err)
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}
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jws.Signature = sig
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return jws, nil
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}
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