Verify file and reader

verify/verify.go

@@ -2,12 +2,15 @@ package verify
 
 import (
 	"bytes"
+	"crypto"
 	"crypto/x509"
 	"encoding/asn1"
 	"fmt"
 	"io"
 	"io/ioutil"
+	"log"
 	"os"
+	"runtime/debug"
 	"time"
 
 	"crypto"
@@ -47,8 +50,16 @@ type Certificate struct {
 	CRLEmbedded  bool
 }
 
-func Verify(file *os.File) (apiResp *Response, err error) {
+func File(file *os.File) (apiResp *Response, err error) {
+	finfo, _ := file.Stat()
+	file.Seek(0, 0)
+
+	return Reader(file, finfo.Size())
+}
+
+func Reader(file io.ReaderAt, size int64) (apiResp *Response, err error) {
 	defer func() {
+		log.Printf("%s\n", debug.Stack())
 		if r := recover(); r != nil {
 			apiResp = nil
 			err = fmt.Errorf("Failed to verify file (%v)", r)
@@ -56,11 +67,6 @@ func Verify(file *os.File) (apiResp *Response, err error) {
 	}()
 	apiResp = &Response{}
 
-	finfo, _ := file.Stat()
-	size := finfo.Size()
-
-	file.Seek(0, 0)
-
 	rdr, err := pdf.NewReader(file, size)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to open file: %v", err)
@@ -146,8 +152,7 @@ func Verify(file *os.File) (apiResp *Response, err error) {
 					signer.TimeStamp, err = timestamp.Parse(attr.Value.Bytes)
 					if err != nil {
 						apiResp.Error = fmt.Sprintln("Failed to parse timestamp", err)
-					}
-
+					} else {
 						r := bytes.NewReader(s.EncryptedDigest)
 						h := crypto.SHA256.New()
 						b := make([]byte, 32)
@@ -168,6 +173,7 @@ func Verify(file *os.File) (apiResp *Response, err error) {
 					}
 				}
 			}
+		}
 
 		// Directory of certificates, including OCSP
 		//var ica *x509.Certificate