Tryanks/pdfsign
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Append instead of replace

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This commit is contained in:
Jeroen Bobbeldijk
2017-07-08 14:55:31 +02:00
parent 6d38be3f51
commit db69b6a4c0
9 changed files with 127 additions and 26 deletions
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7
sign/pdfsignature.go
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@@ -29,7 +29,7 @@ func (context *SignContext) createSignaturePlaceholder() (signature string, byte
// Create a placeholder for the actual signature content, we wil replace it later.
signature += " /Contents<" + strings.Repeat("0", int(signatureMaxLength)) + ">"
if context.SignData.Signature.Approval {
if !context.SignData.Signature.Approval {
signature += " /Reference [" // array of signature reference dictionaries
signature += " << /Type /SigRef"
if context.SignData.Signature.CertType > 0 {
@@ -77,9 +77,6 @@ func (context *SignContext) createSignature() ([]byte, error) {
io.Copy(sign_buf, context.OutputFile)
file_content := sign_buf.Bytes()
// Remove trailing newline.
file_content = file_content[:len(file_content)-1]
// Collect the parts to sign.
sign_content := make([]byte, 0)
sign_content = append(sign_content, file_content[context.ByteRangeValues[0]:(context.ByteRangeValues[0]+context.ByteRangeValues[1])]...)
@@ -111,7 +108,7 @@ func (context *SignContext) replaceSignature() error {
dst := make([]byte, hex.EncodedLen(len(signature)))
hex.Encode(dst, signature)
context.OutputFile.WriteAt(dst, context.ByteRangeValues[0]+context.ByteRangeValues[1])
context.OutputFile.WriteAt(dst, context.ByteRangeValues[0] + context.ByteRangeValues[1] + 1)
return nil
}