Signature support: use an enum to report errors.

Previously, errors were reported with a boolean function return
with a char buffer filled out with the reason in the failure
case. Now an enum is used to report the various failure cases.
The function pdf_check_signature has been left as is so that
existing apps will not need changing.

1 files changed, 12 insertions, 0 deletions

diff --git a/include/mupdf/pdf/crypt.h b/include/mupdf/pdf/crypt.h
index e29da8ca..555a8d25 100644
--- a/include/mupdf/pdf/crypt.h
+++ b/include/mupdf/pdf/crypt.h
@@ -21,6 +21,18 @@ unsigned char *pdf_crypt_key(fz_context *ctx, pdf_document *doc);
 
 void pdf_print_crypt(fz_context *ctx, fz_output *out, pdf_crypt *crypt);
 
+typedef enum
+{
+	SignatureError_Okay,
+	SignatureError_NoSignatures,
+	SignatureError_NoCertificate,
+	SignatureError_DocumentChanged,
+	SignatureError_SelfSigned,
+	SignatureError_SelfSignedInChain,
+	SignatureError_NotTrusted,
+	SignatureError_Unknown
+} SignatureError;
+
 typedef struct pdf_designated_name_s
 {
 	char *cn;