Allow constructed strings in BER parsing#2015
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WillChilds-Klein merged 1 commit intoaws:mainfrom Dec 2, 2024
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This change relaxes a prior restriction forbidding constructed strings when parsing ASN.1 BER. We modify relevant tests accordingly and fix two small errors in PEM fixtures. `kConstructedBitString` contained a bit string with invalid padding. We fixed this by zeroing out the final padding byte of each constructed bit string component. `kConstructedOctetString`' constructed string components were typed as integers (type `0x02`) instead of octet strings (type `0x04`). For that, we simply change the types to `0x04`.
samuel40791765
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Nov 27, 2024
justsmth
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Dec 2, 2024
samuel40791765
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Mar 18, 2025
This reverts commit 2a72226.
samuel40791765
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This reverts commit 2a72226. ### Issues: Addresses `CryptoAlg-3037` ### Description of changes: We've ran into issues with parsing indefinite BER with PKCS7 and it turns out our support for parsing is not as complete. Instead of parsing BER to an invalid unusable state that's confusing, we should outright disallow parsing of constructed strings in BER until we fix the issue. ### Call-outs: N/A ### Testing: Original tests. Ruby CI is expected to fail. I'll update the patches in another PR. By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.
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## What's Changed * Revert "Allow constructed strings in BER parsing (#2015)" by @samuel40791765 in #2278 * Add the rehash utility to the openssl CLI tool by @smittals2 in #2258 * Documentation on service indicator by @justsmth in #2281 * Update patches in Ruby CI by @samuel40791765 in #2233 * Reject DSA trailing garbage in EVP layer, add test cases by @skmcgrail in #2289 * Add support for verifying PKCS7 signed attributes by @samuel40791765 in #2264 * Add support for more SSL BIO functions by @samuel40791765 in #2273 * Wire-up rust-openssl into GitHub CI (for the time being) by @skmcgrail in #2291 * Adding detection of out-of-bound pre-bound memory read to AES-XTS tests. by @nebeid in #2286 * AES: Add function pointer trampoline to avoid delocator issue by @hanno-becker in #2294 * Bump mysql CI to 9.2.0 by @samuel40791765 in #2161 * Cherrypick hardening DSA param checks from BoringSSL by @smittals2 in #2293 By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.
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Issues:
Addresses CryptoAlg-2494
Description of changes:
This change relaxes a prior restriction forbidding constructed strings when parsing ASN.1 BER. We modify relevant tests accordingly and fix two small errors in PEM fixtures.
kConstructedBitStringcontained a bit string with invalid padding. We fixed this by zeroing out the final padding byte of each constructed bit string component.kConstructedOctetString' constructed string components were typed as integers (type0x02) instead of octet strings (type0x04). For that, we simply change the types to0x04.Call-outs:
Testing:
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.