Tryanks/pdfsign
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WIP - use another API for signing

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tigp
2018-06-29 18:12:49 +02:00
parent af18f0bd57
commit 6b914d1698
8 changed files with 68 additions and 43 deletions
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34
sign/pdfsignature.go
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@@ -49,22 +49,28 @@ func (context *SignContext) createSignaturePlaceholder() (dssd string, byte_rang
signature_buffer.Write(bytes.Repeat([]byte("0"), int(context.SignatureMaxLength)))
signature_buffer.WriteString(">")
if !context.SignData.Signature.Approval {
signature_buffer.WriteString(" /Reference [") // array of signature reference dictionaries
switch context.SignData.Signature.CertType {
case CertificationSignature, UsageRightsSignature:
signature_buffer.WriteString(" /Reference [") // start array of signature reference dictionaries
signature_buffer.WriteString(" << /Type /SigRef")
if context.SignData.Signature.CertType > 0 {
signature_buffer.WriteString(" /TransformMethod /DocMDP")
signature_buffer.WriteString(" /TransformParams <<")
signature_buffer.WriteString(" /Type /TransformParams")
signature_buffer.WriteString(" /P " + strconv.Itoa(int(context.SignData.Signature.CertType)))
signature_buffer.WriteString(" /V /1.2")
} else {
signature_buffer.WriteString(" /TransformMethod /UR3")
signature_buffer.WriteString(" /TransformParams <<")
signature_buffer.WriteString(" /Type /TransformParams")
signature_buffer.WriteString(" /V /2.2")
}
}
switch context.SignData.Signature.CertType {
case CertificationSignature:
signature_buffer.WriteString(" /TransformMethod /DocMDP")
signature_buffer.WriteString(" /TransformParams <<")
signature_buffer.WriteString(" /Type /TransformParams")
signature_buffer.WriteString(" /P " + strconv.Itoa(int(context.SignData.Signature.DocMDPPerm)))
signature_buffer.WriteString(" /V /1.2")
case UsageRightsSignature:
signature_buffer.WriteString(" /TransformMethod /UR3")
signature_buffer.WriteString(" /TransformParams <<")
signature_buffer.WriteString(" /Type /TransformParams")
signature_buffer.WriteString(" /V /2.2")
}
switch context.SignData.Signature.CertType {
case CertificationSignature, UsageRightsSignature:
signature_buffer.WriteString(" >>") // close TransformParams
signature_buffer.WriteString(" >>")
signature_buffer.WriteString(" ]") // end of reference