[Bug #14087] x509cert, x509crl, x509req, ns_spki: check sanity of public key #168
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Also make it take const pointer as it never modifies the pkey.
The pub_encode routine of an EVP_PKEY_ASN1_METHOD seems to assume the parameters and public key component(s) to be set properly. Calling that, for example, through X509_set_pubkey(), with an incomplete object may cause segfault. Use ossl_pkey_check_public_key() to check that. It doesn't look pretty, but unfortunately there isn't a generic way to do that with the EVP API. Something similar applies to the verify routine of an EVP_PKEY_METHOD. Do the same check before calling *_verify(). Reference: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/83688 Reference: https://bugs.ruby-lang.org/issues/14087
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The pub_encode routine of an EVP_PKEY_ASN1_METHOD seems to assume the
parameters and public key component(s) to be set properly. Calling that,
for example, through X509_set_pubkey(), with an incomplete object may
cause segfault.
Use ossl_pkey_check_public_key() to check that. It doesn't look pretty,
but unfortunately there isn't a generic way to do that with the EVP API.
Something similar applies to the verify routine of an EVP_PKEY_METHOD.
Do the same check before calling *_verify().
Reference: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/83688
Reference: https://bugs.ruby-lang.org/issues/14087