pkcs7: remove default cipher from PKCS7.encrypt #796
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Require that users explicitly specify the desired algorithm. In my opinion, we are not in a position to specify the default cipher. When OpenSSL::PKCS7.encrypt is given only two arguments, it uses "RC2-40-CBC" as the symmetric cipher algorithm. 40-bit RC2 is a US export-grade cipher and considered insecure. Although this is technically a breaking change, the impact should be minimal. Even when OpenSSL is compiled with RC2 support and the macro OPENSSL_NO_RC2 is not defined, it will not actually work on modern systems because RC2 is part of the legacy provider.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fixes the bug reported at ruby/ruby#11515 in a different way. Defaulting to 40-bit RC2 doesn't seem right to me in the first place.
Require that users explicitly specify the desired algorithm. In my opinion, we are not in a position to specify the default cipher.
When OpenSSL::PKCS7.encrypt is given only two arguments, it uses "RC2-40-CBC" as the symmetric cipher algorithm. 40-bit RC2 is a US export-grade cipher and considered insecure.
Although this is technically a breaking change, the impact should be minimal. Even when OpenSSL is compiled with RC2 support and the macro OPENSSL_NO_RC2 is not defined, it will not actually work on modern systems because RC2 is part of the legacy provider.