英文:
PDFBox throwing exception java.io.IOException: java.security.InvalidKeyException: Illegal key size
问题
我正在尝试使用PDFBox来合并多个PDF文档。代码如下：
我遇到了一个问题。对于一些PDF文件，我收到了“`java.io.IOException: java.security.InvalidKeyException: Illegal key size`”的错误。
我不确定发生了什么。是否有人可以帮助我？
PDFMergerUtility PDFutility = new PDFMergerUtility();
ByteArrayOutputStream mergedPdf = new ByteArrayOutputStream();
PDFutility.addSources(pdfDocs);
PDFutility.setDestinationStream(mergedPdf);
PDFutility.mergeDocuments();
**错误信息**
> Caused by: java.io.IOException: java.security.InvalidKeyException: Illegal key size
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.computeEncryptedKeyRev56(StandardSecurityHandler.java:779)
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.computeEncryptedKey(StandardSecurityHandler.java:681)
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.prepareForDecryption(StandardSecurityHandler.java:256)
> at org.apache.pdfbox.pdfparser.COSParser.prepareDecryption(COSParser.java:2929)
> at org.apache.pdfbox.pdfparser.COSParser.retrieveTrailer(COSParser.java:286)
> at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:173)
> at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:226)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1222)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1140)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:455)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:346)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:330)
英文:
I am trying PDFBox for merging multiple PDF documents. Code is below.
I am facing an issue. For a few PDF files I am getting "java.io.IOException: java.security.InvalidKeyException: Illegal key size".<br>
I am not sure what is going on. Could someone please help me ?
PDFMergerUtility PDFutility = new PDFMergerUtility();
ByteArrayOutputStream mergedPdf = new ByteArrayOutputStream();
PDFutility.addSources(pdfDocs);
PDFutility.setDestinationStream(mergedPdf);
PDFutility.mergeDocuments();
The Error
> Caused by: java.io.IOException: java.security.InvalidKeyException: Illegal key size
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.computeEncryptedKeyRev56(StandardSecurityHandler.java:779)
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.computeEncryptedKey(StandardSecurityHandler.java:681)
> at org.apache.pdfbox.pdmodel.encryption.StandardSecurityHandler.prepareForDecryption(StandardSecurityHandler.java:256)
> at org.apache.pdfbox.pdfparser.COSParser.prepareDecryption(COSParser.java:2929)
> at org.apache.pdfbox.pdfparser.COSParser.retrieveTrailer(COSParser.java:286)
> at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:173)
> at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:226)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1222)
> at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1140)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:455)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:346)
> at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:330)
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