Merge branch 'dev'
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Axel Svensson
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README-example-signature.gif
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README-example-signature.gif
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Vorher Breite: | Höhe: | Größe: 342 KiB Nachher Breite: | Höhe: | Größe: 342 KiB |
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@ -5,7 +5,7 @@
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A tool to sign PDF files, with Linux support.
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We are here referring to the visible, non-cryptographic squiggles.
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## How
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@ -16,6 +16,11 @@ The recommended way is:
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* Use an application of your choice to sign it.
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You can for example use Okular's Freehand Line, or transfer it to your smartphone and use Adobe Acrobat Reader.
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Keep in mind that it's the center of this mini-page that will be used for positioning the signature.
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<img src="README-example-signature.gif" width="250"/>
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It's a good idea to write your signature on an imagined line through the center of the mini-page.
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That way, it can be positioned correctly by clicking on the signature line.
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* Put the signed file in your signature directory.
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The signature directory is `$PDF_SIGNATURE_DIR`, `$XDG_CONFIG_HOME/pdf_signatures`, `$HOME/.config/pdf_signatures` or `$HOME/.pdf_signatures/`; the first one that exists. Use `pdf-sign -h` to confirm which one will be used on your system.
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Binäre Datei nicht angezeigt.
155
pdf-sign
155
pdf-sign
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@ -65,41 +65,44 @@ def main(args):
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return outFile
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pageSize=Cell(lambda: pdfGetSize(pagePDF()))
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# The chosen signature
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if args.batch:
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if not args.signature and not args.text:
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if args.signature:
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if args.text:
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die('--signature and --text cannot be specified together.')
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if not os.path.exists(args.signature):
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die(f'File not found: {args.signature}')
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signatures=[('file', args.signature, args.signature)]
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elif args.batch:
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assert not args.signature
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if not args.text:
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die('In batch mode, --signature or --text must be specified.')
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if args.text and len(args.text) > 1:
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if len(args.text) > 1:
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die('In batch mode, --text must be given only once.')
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if args.signature and args.text:
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die('--signature and --text cannot be specified together.')
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if args.signature and not os.path.exists(args.signature):
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die(f'File not found: {args.signature}')
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if args.text:
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assert(len(args.text) > 0)
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latin1_chars=set([*range(0x20, 0x7f), *range(0xa0, 0x100)])
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for text in args.text:
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text_chars=set(map(ord, text))
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if not text_chars.issubset(latin1_chars):
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die("Error: Only non-control latin-1 characters are supported in --text." +
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" Unsupported characters: " + ', '.join(map(hex, text_chars - latin1_chars)))
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signatureDir=getSignatureDir()
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signatures=[('file', x) for x in filter(isPdfFilename, os.listdir(signatureDir))] if not args.signature else [None]
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if not signatures and not args.text:
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die(f'Could not find anything usable as signature, since no .pdf files found in {signatureDir} and no --text option given.')
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signatures.sort()
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if args.text:
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signatures=[('text', x) for x in args.text] + signatures
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validateText(args.text[0], True)
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signatures=[('text', textLabel(args.text[0]), args.text[0])]
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else:
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(signatureDir, signatureDirHelp)=getSignatureDirAndHelp()
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signatures=([('file', x, os.path.join(signatureDir, x))
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for x in filter(isPdfFilename, os.listdir(signatureDir))]
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if signatureDir else [])
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signatures.sort()
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if not signatures and not args.text:
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die('Could not find any usable signatures. No --signature, no --text, and ' +
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('no .pdf files found in {signatureDir}.'
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if signatureDir else
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f'no signature directory. The options considered for signature directory are: {signatureDirHelp}'))
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if args.text:
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assert(len(args.text) > 0)
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for text in args.text:
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validateText(text, True)
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signatures=[('text', textLabel(x), x) for x in args.text] + signatures
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signatureIndex=Cell(0)
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customText=Cell(('text', time.strftime('%Y-%m-%d')))
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@Cell
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def signaturePath():
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if args.signature:
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return args.signature
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(signType, content)=signatures[signatureIndex()]
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(signType, _, content)=signatures[signatureIndex()]
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if signType=='cell':
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(signType, content)=content()
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(signType, _, content)=content()
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if signType=='file':
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return os.path.join(signatureDir, content)
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return content
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assert signType=='text'
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cache = signaturePath._cache
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if content in cache:
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@ -110,13 +113,25 @@ def main(args):
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return fileName
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signaturePath._cache={}
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signatureSize=Cell(lambda: pdfGetSize(signaturePath()))
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signaturePositionX=Cell(args.x_coordinate)
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signaturePositionY=Cell(args.y_coordinate)
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try:
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xm=m("^(L\\+|L-|R\\+|R-|-|)([0-9.]+)%$", args.x_coordinate)
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default_x=(lambda x:{'L+':x,'L-':-x,'R+':1+x,'R-':1-x,'-':-x,'':x}[xm[1]])(float(xm[2])/100)
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except:
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die('Invalid -x option')
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try:
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ym=m("^(T\\+|T-|B\\+|B-|-|)([0-9.]+)%$", args.y_coordinate)
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default_y=(lambda y:{'T+':y,'T-':-y,'B+':1+y,'B-':1-y,'-':-y,'':y}[ym[1]])(float(ym[2])/100)
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except:
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die('Invalid -y option')
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signaturePositionX=Cell(default_x)
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signaturePositionY=Cell(default_y)
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signatureScale=Cell(0)
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def translatablePDF(path):
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cache = translatablePDF._cache
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if path not in cache:
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(w, h) = pdfGetSize(path)
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if not (1 < w and 1 < h):
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die(f"The PDF at {path} is unusable as a signature due to too small dimensions.")
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(double_w, double_h) = (2*w, 2*h)
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testFile = intmp('translateTest.pdf')
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subprocess.run([
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@ -128,7 +143,7 @@ def main(args):
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'-f', path,
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], check=True)
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(test_w, test_h) = pdfGetSize(testFile)
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if (test_w, test_h) == (double_w, double_h):
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if abs(test_w - double_w) < 0.01 and abs(test_h - double_h) < 0.01:
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# The pdf file at path can be translated correctly
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cache[path] = path
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elif (test_w, test_h) == (w, h):
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@ -159,11 +174,28 @@ def main(args):
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die(f"The PDF at {path} is unusable as a signature. Reason unknown.")
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return cache[path]
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translatablePDF._cache={}
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@Cell
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def defaultResizeFactor():
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(pageWidth, pageHeight)=pageSize()
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try:
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wm=m("^([0-9.]+)(pts|pt|in|cm|mm|%)$", args.width)
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maxSignatureWidth=int(float(wm[1])*({'pts':1,'pt':1,'in':72,'cm':28.3,'mm':2.83,'%':pageWidth/100}[wm[2]]))
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except:
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die('Invalid -W option')
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try:
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hm=m("^([0-9.]+)(pts|pt|in|cm|mm|%)$", args.height)
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maxSignatureHeight=int(float(hm[1])*({'pts':1,'pt':1,'in':72,'cm':28.3,'mm':2.83,'%':pageHeight/100}[hm[2]]))
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except:
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die('Invalid -H option')
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(signatureWidth, signatureHeight)=signatureSize()
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return min(args.resize_factor,
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maxSignatureWidth / signatureWidth,
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maxSignatureHeight / signatureHeight)
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@VolatileCell
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def signaturePositionedPDF():
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(w, h)=pageSize()
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(sw, sh)=signatureSize()
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resize=1.1**signatureScale()*min(args.width*w/sw, args.height*h/sh)
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resize=1.1**signatureScale()*defaultResizeFactor()
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dx=w*signaturePositionX()/resize - sw/2
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dy=h*(1-signaturePositionY())/resize - sh/2
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outFile=intmp('signature-positioned.pdf')
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@ -220,6 +252,7 @@ def main(args):
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except ModuleNotFoundError:
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die('Cannot find Python module `tkinter`, which is needed for interactive use.')
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doSign=False
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customText=Cell(('text', None, time.strftime('%Y-%m-%d')))
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customTextIndex = len(signatures)
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# Commands
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def uf(fun):
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@ -260,32 +293,25 @@ def main(args):
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text = simpledialog.askstring(
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"Custom Text",
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"Input the text you want to stamp this PDF file with",
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initialvalue=customText()[1])
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initialvalue=customText()[2])
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if text == None:
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return
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# Validate text
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text_chars=set(map(ord, text))
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latin1_chars=set([*range(0x20, 0x7f), *range(0xa0, 0x100)])
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if not text_chars.issubset(latin1_chars):
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validateMsg = validateText(text, False)
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if validateMsg:
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simpledialog.messagebox.showerror(
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parent=root,
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title="Invalid text",
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message=f"Only non-control latin-1 characters are supported. Unsupported characters: {', '.join(map(hex, text_chars - latin1_chars))}"
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)
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return
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if not (1 <= len(text) and len(text) <= 100):
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simpledialog.messagebox.showerror(
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parent=root,
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title="Invalid text",
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message="Text must be between 1 and 100 characters long."
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message=validateMsg
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)
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return
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# Set text
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customText(('text', text))
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customText(('text', None, text))
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signatureIndex(customTextIndex)
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label='Custom text: ' + (text if len(text) <= 20 else (text[:17] + '...'))
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label='Custom text: ' + textLabel(text)
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placemenu.entryconfig(len(signatures) + 2, label=label)
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update()
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def textLabel(text): return f'"{text}"' if len(text) <= 20 else f'Custom text: "{text[:17]}"...'
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def cmd_abort():
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root.destroy()
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def cmd_sign():
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@ -323,18 +349,18 @@ def main(args):
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if root.signatureControlVar.get() != signatureIndex():
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signatureIndex(root.signatureControlVar.get())
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update()
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for index, (_, signature) in enumerate(signatures):
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for index, (_, signatureText, _) in enumerate(signatures):
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placemenu.add_radiobutton(
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value=index,
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label=f'{index+1}: {signature}',
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label=f'{index+1}: {signatureText}',
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underline=0 if index<9 else None,
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variable=root.signatureControlVar,
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accelerator=(str(index+1) if index<9 else None),
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command=updateFromSignatureRadio)
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signatures.append(('cell', customText))
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signatures.append(('cell', None, customText))
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placemenu.add_radiobutton(
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value=customTextIndex,
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label='Custom text: ' + customText()[1],
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label='Custom text: ' + textLabel(customText()[2]),
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underline=7,
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variable=root.signatureControlVar,
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accelerator='T',
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@ -487,11 +513,21 @@ def qpdfOrPdftk(qpdfCmd, pdftkCmd):
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subprocess.run(cmd, check=True)
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return True # Some lambdas above rely on this
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def getSignatureDir():
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(path, helptxt) = getSignatureDirAndHelp()
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if not path:
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die(f"Could not find a valid signature directory. The options considered are: {helptxt}")
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return path
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def validateText(text, do_die):
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latin1_chars=set([*range(0x20, 0x7f), *range(0xa0, 0x100)])
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text_chars=set(map(ord, text))
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msg = ""
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if not text_chars.issubset(latin1_chars):
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msg = ("Error: Only non-control latin-1 characters are supported" +
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(" in --text" if do_die else "") +
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". Unsupported characters: " + ', '.join(map(hex, text_chars - latin1_chars)))
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elif not (1 <= len(text) and len(text) <= 100):
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msg = "Text must be between 1 and 100 characters long."
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if not msg:
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return None
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if do_die:
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die(msg)
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return msg
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def getSignatureDirAndHelp():
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def candidate(prevpath, prevhelptxt, nr, lbl, envvar, path):
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@ -742,10 +778,11 @@ parser = argparse.ArgumentParser(description='Sign a PDF file, with a non-crypto
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parser.add_argument('input', metavar='input.pdf', type=str, help='Input PDF file.')
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parser.add_argument('-p', '--page', type=int, default=-1, help='The page to sign, negative for counting from the end. (default: -1)')
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parser.add_argument('-s', '--signature', type=str, help=getSignatureHelp())
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parser.add_argument('-x', '--x-coordinate', type=float, default=0.5, help='Horizontal coordinate of signature center, in page width units. (default: 0.5)')
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parser.add_argument('-y', '--y-coordinate', type=float, default=0.75, help='Vertical coordinate of signature center, in page height units. (default: 0.75)')
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parser.add_argument('-W', '--width', type=float, default=0.28, help='Width of box to fit signature to, in page width units. (default: 0.28)')
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parser.add_argument('-H', '--height', type=float, default=0.11, help='Height of box to fit signature to, in page height units. (default: 0.11)')
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parser.add_argument('-x', '--x-coordinate', type=str, default="50%", help='Horizontal coordinate of signature center. Requires unit %% (meaning percent of page width). May be preceded by L+ (default), L-, R+ or R- to give coordinate relative left of right edge of the page. For example, 25%% means a quarter page width from left edge, R-3%% means 3%% of page width from right edge. (default: 50%%)')
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parser.add_argument('-y', '--y-coordinate', type=str, default="B-25%", help='Vertical coordinate of signature center. Requires unit %% (meaning percent of page height). May be preceded by T+ (default), T-, B+ or B- to give coordinate relative top or bottom edge of the page. For example, 3%% means 3%% of page height from top edge, B-10%% means 10%% of page height from bottom edge. (default: B-25%%)')
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parser.add_argument('-r', '--resize-factor', type=float, default=1.0, help='Resize signature by this factor. If this would make the signature larger than allowed by -W or -H, then instead use the maximum allowed size.')
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parser.add_argument('-W', '--width', type=str, default="50%", help='Maximum width of signature. Supports units pts, in, cm, mm and %% (meaning percent of page width). (default: 50%%)')
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parser.add_argument('-H', '--height', type=str, default="50%", help='Maximum height of signature. Supports units pts, in, cm, mm and %% (meaning percent of page height). (default: 50%%)')
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parser.add_argument('-o', '--output', type=str, help='Output file. (default: Add ".signed" before the extension)')
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parser.add_argument('-b', '--batch', action=argparse.BooleanOptionalAction, default=False, help='Batch mode: do not show GUI. (default: False)')
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parser.add_argument('-f', '--flatten', action=argparse.BooleanOptionalAction, default=True, help='Flatten before signing, preventing subsequent changes in PDF forms. (default: True)')
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