wip

Author: hhrutter

README.md

@@ -4,7 +4,7 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/hhrutter/pdfcpu)](https://goreportcard.com/report/github.com/hhrutter/pdfcpu) 
 [![License: MIT](https://img.shields.io/github/license/mashape/apistatus.svg)](https://opensource.org/licenses/MIT) 
 
-![logo](pdfchip3.png)
+![logo](resources/pdfchip3.png)
   # pdfcpu: a golang pdf processor
 
 Package pdfcpu is a simple PDF processing library written in [Go](http://golang.org).
@@ -25,14 +25,16 @@ I also wanted to have my own swiss army knife for PDFs written entirely in [Go](
 * Optimize (gets rid of redundancies like duplicate fonts, images)
 * Split (split a multi page PDF file into single page PDF files)
 * Merge (a set of PDF files into one consolidated PDF file)
-* Trim (generate a custom version of a PDF file)
 * Extract Images (extract all embedded images of a PDF file into a given dir)
 * Extract Fonts (extract all embedded fonts of a PDF file into a given dir)
 * Extract Pages (extract specific pages into a given dir)
 * Extract Content (extract the PDF-Source into given dir)
+* Trim (generate a custom version of a PDF file)
+* Encrypt
+* Decrypt
 
 ### Demo Screencast
-[![asciicast](demo.png)](https://asciinema.org/a/P5jaAo9kgZXKj2iSA1OqIdLAU)
+[![asciicast](resources/demo.png)](https://asciinema.org/a/P5jaAo9kgZXKj2iSA1OqIdLAU)
 
 ### Installation
 `go get github.com/hhrutter/pdfcpu/cmd/...`
@@ -52,6 +54,10 @@ I also wanted to have my own swiss army knife for PDFs written entirely in [Go](
 
     pdfcpu trim [-verbose] -pages pageSelection [-upw userpw] [-opw ownerpw] inFile outFile
 
+    pdfcpu encrypt [-verbose] [-upw userpw] [-opw ownerpw] inFile [outFile]
+
+    pdfcpu decrypt [-verbose] [-upw userpw] [-opw ownerpw] inFile [outFile]
+
  [Please read the documentation ](https://godoc.org/github.com/hhrutter/pdfcpu)
 
 

cmd/pdfcpu/main.go

@@ -31,9 +31,13 @@ The commands are:
 	optimize	optimize PDF by getting rid of redundant page resources
 	split		split multi-page PDF into several single-page PDFs
 	merge		concatenate 2 or more PDFs
-	extract		extract images, fonts, content, pages out of a PDF
-	trim		create trimmed version of a PDF
-	version		print pdfcpu version
+	extract		extract images, fonts, content or pages
+	trim		create trimmed version
+	encrypt		set password protection		
+	decrypt		remove password protection
+	changeupw	change user password
+	changeopw	change owner password
+	version		print version
 
 	Single-letter Unix-style supported for commands and flags.
 
@@ -62,7 +66,7 @@ verbose ... extensive log output
     upw ... user password
     opw ... owner password
  inFile ... input pdf file
-outFile ... output pdf file (default: inputPdfFile-opt.pdf)`
+outFile ... output pdf file (default: inFile-new.pdf)`
 
 	usageSplit     = "usage: pdfcpu split [-verbose] [-upw userpw] [-opw ownerpw] inFile outDir"
 	usageLongSplit = `Split generates a set of single page PDFs for the input file in outDir.
@@ -126,6 +130,24 @@ Valid pageSelections e.g. -3,5,7- or 4-7,!6 or 1-,!5
 
 A missing pageSelection means all pages are selected for generation.`
 
+	usageEncrypt     = "usage: pdfcpu encrypt [-verbose] [-upw userpw] [-opw ownerpw] inFile [outFile]"
+	usageLongEncrypt = `Encrypt sets password protection based on user and owner password.
+
+verbose ... extensive log output
+    upw ... user password
+    opw ... owner password
+ inFile ... input pdf file
+outFile ... output pdf file (default: inFile-new.pdf)`
+
+	usageDecrypt     = "usage: pdfcpu decrypt [-verbose] [-upw userpw] [-opw ownerpw] inFile [outFile]"
+	usageLongDecrypt = `Decrypt removes the password protection.
+
+verbose ... extensive log output
+    upw ... user password
+    opw ... owner password
+ inFile ... input pdf file
+outFile ... output pdf file (default: inFile-new.pdf)`
+
 	usageVersion     = "usage: pdfcpu version"
 	usageLongVersion = "Version prints the pdfcpu version"
 )
@@ -209,6 +231,12 @@ func help() {
 	case "trim":
 		fmt.Printf("%s\n\n%s\n\n%s\n", usageTrim, usageLongTrim, usagePageSelection)
 
+	case "encrypt":
+		fmt.Printf("%s\n\n%s\n", usageEncrypt, usageLongEncrypt)
+
+	case "decrypt":
+		fmt.Printf("%s\n\n%s\n", usageDecrypt, usageLongDecrypt)
+
 	case "version":
 		fmt.Printf("%s\n\n%s\n", usageVersion, usageLongVersion)
 
@@ -396,6 +424,77 @@ func main() {
 
 		cmd = pdfcpu.TrimCommand(filenameIn, filenameOut, pages, config)
 
+	case "decrypt", "d", "dec":
+
+		d := true
+		config.Decrypt = &d
+
+		if len(flag.Args()) == 0 || len(flag.Args()) > 2 || pageSelection != "" {
+			fmt.Printf("%s\n\n", usageDecrypt)
+			return
+		}
+
+		filenameIn := flag.Arg(0)
+		ensurePdfExtension(filenameIn)
+
+		filenameOut := defaultFilenameOut(filenameIn)
+		if len(flag.Args()) == 2 {
+			filenameOut = flag.Arg(1)
+			ensurePdfExtension(filenameOut)
+		}
+
+		// Always write using 0x0A end of line sequence.
+		cmd = pdfcpu.OptimizeCommand(filenameIn, filenameOut, config)
+
+	case "encrypt", "enc":
+
+		d := false
+		config.Decrypt = &d
+
+		if len(flag.Args()) == 0 || len(flag.Args()) > 2 || pageSelection != "" {
+			fmt.Printf("%s\n\n", usageEncrypt)
+			return
+		}
+
+		filenameIn := flag.Arg(0)
+		ensurePdfExtension(filenameIn)
+
+		filenameOut := defaultFilenameOut(filenameIn)
+		if len(flag.Args()) == 2 {
+			filenameOut = flag.Arg(1)
+			ensurePdfExtension(filenameOut)
+		}
+
+		cmd = pdfcpu.OptimizeCommand(filenameIn, filenameOut, config)
+
+	case "changeupw":
+		if len(flag.Args()) != 3 {
+			fmt.Println("changeupw needs 3 args")
+			return
+		}
+		config.UserPW = flag.Arg(1)
+		s := flag.Arg(2)
+		config.UserPWNew = &s
+		fmt.Printf("changeupw: old=%s new=%s\n", config.UserPW, *config.UserPWNew)
+
+		filenameIn := flag.Arg(0)
+		ensurePdfExtension(filenameIn)
+		cmd = pdfcpu.OptimizeCommand(filenameIn, defaultFilenameOut(filenameIn), config)
+
+	case "changeopw":
+		if len(flag.Args()) != 3 {
+			fmt.Println("changeopw needs 3 args")
+			return
+		}
+		config.OwnerPW = flag.Arg(1)
+		s := flag.Arg(2)
+		config.OwnerPWNew = &s
+		fmt.Printf("changeopw: old=%s new=%s\n", config.UserPW, *config.OwnerPWNew)
+
+		filenameIn := flag.Arg(0)
+		ensurePdfExtension(filenameIn)
+		cmd = pdfcpu.OptimizeCommand(filenameIn, defaultFilenameOut(filenameIn), config)
+
 	case "version":
 
 		if len(flag.Args()) != 0 {