PDFBOX-5940: use the algorithm from the certificate

THausherr · THausherr · commit 41ebe0393dfa · 2025-01-27T07:50:28.000Z
git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1923391 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/examples/src/main/java/org/apache/pdfbox/examples/signature/CreateSignatureBase.java b/examples/src/main/java/org/apache/pdfbox/examples/signature/CreateSignatureBase.java
@@ -138,7 +138,7 @@ public byte[] sign(InputStream content) throws IOException
         {
             CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
             X509Certificate cert = (X509Certificate) certificateChain[0];
-            ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA256WithRSA").build(privateKey);
+            ContentSigner sha1Signer = new JcaContentSignerBuilder(cert.getSigAlgName()).build(privateKey);
             gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build()).build(sha1Signer, cert));
             gen.addCertificates(new JcaCertStore(Arrays.asList(certificateChain)));
             CMSProcessableInputStream msg = new CMSProcessableInputStream(content);

Original file line number	Diff line number	Diff line change
`@@ -138,7 +138,7 @@ public byte[] sign(InputStream content) throws IOException`
`138`	`138`	`{`
`139`	`139`	`CMSSignedDataGenerator gen = new CMSSignedDataGenerator();`
`140`	`140`	`X509Certificate cert = (X509Certificate) certificateChain[0];`
`141`		`- ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA256WithRSA").build(privateKey);`
	`141`	`+ ContentSigner sha1Signer = new JcaContentSignerBuilder(cert.getSigAlgName()).build(privateKey);`
`142`	`142`	`gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build()).build(sha1Signer, cert));`
`143`	`143`	`gen.addCertificates(new JcaCertStore(Arrays.asList(certificateChain)));`
`144`	`144`	`CMSProcessableInputStream msg = new CMSProcessableInputStream(content);`