Tryanks/pdfsign
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Retry with expected signature lenght

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This commit is contained in:
Paul van Brouwershaven
2022-06-29 21:07:59 +02:00
parent 2ce268ea4d
commit 3caf640baa
2 changed files with 18 additions and 10 deletions
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11
sign/pdfsignature.go
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@@ -225,7 +225,7 @@ func (context *SignContext) GetTSA(sign_content []byte) (timestamp_response []by
ts_request_reader := bytes.NewReader(ts_request)
req, err := http.NewRequest("POST", context.SignData.TSA.URL, ts_request_reader)
if err != nil {
return nil, err
return nil, fmt.Errorf("error requesting timestamp (%s): %w", context.SignData.TSA.URL, err)
}
req.Header.Add("Content-Type", "application/timestamp-query")
@@ -247,9 +247,9 @@ func (context *SignContext) GetTSA(sign_content []byte) (timestamp_response []by
if err == nil {
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
err = errors.New("Non success response (" + strconv.Itoa(code) + "): " + string(body))
err = errors.New("non success response (" + strconv.Itoa(code) + "): " + string(body))
} else {
err = errors.New("Non success response (" + strconv.Itoa(code) + ")")
err = errors.New("non success response (" + strconv.Itoa(code) + ")")
}
return nil, err
@@ -274,7 +274,10 @@ func (context *SignContext) replaceSignature() error {
hex.Encode(dst, signature)
if uint32(len(dst)) > context.SignatureMaxLength {
return errors.New("Signature is too big to fit in reserved space.")
// TODO: Should we log this retry?
// set new base and try signing again
context.SignatureMaxLengthBase += (uint32(len(dst)) - context.SignatureMaxLength) + 1
return context.SignPDF()
}
context.OutputBuffer.Seek(0, 0)