avoid classcastexception in cms signerinfo decode via getinstance#2342
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rootvector2 wants to merge 1 commit into
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avoid classcastexception in cms signerinfo decode via getinstance#2342rootvector2 wants to merge 1 commit into
rootvector2 wants to merge 1 commit into
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SignerInfo's decode constructor cast theversionand trailingunsignedAttrselements instead of usinggetInstance, so a malformed-but-parseable CMS message leaks aClassCastExceptionpastCMSSignedData.verifySignatures()'sthrows CMSExceptioncontract whengetSignerInfos()/getCounterSignatures()enumerate the signers outside thegetSignedData()cast guard; found while checking siblings of the recentasn1.cms.Attributetype-check, fixed by decoding viaASN1Integer.getInstance/ASN1TaggedObject.getInstanceto match the already-hardenedasn1.pkcs.SignerInfo.