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use the SAN type tag in Mbed TLS verify_hostname and get_cert_sans (#2614)

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* use the SAN type tag in Mbed TLS verify_hostname and get_cert_sans

Mbed TLS keeps a subjectAltName entry's GeneralName tag in buf.tag and the bare value in buf.p / buf.len. verify_hostname ignored the tag, so a dNSName whose bytes equal an address authenticated that IP host, and an iPAddress or rfc822Name was matched as a DNS pattern. get_cert_sans looked for the tag inside the value, so it reported no entries for an ordinary certificate, or part of a dNSName as an entry of its own.

* Shorten the SAN type comments

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Co-authored-by: yhirose <yuji.hirose.bug@gmail.com>
This commit is contained in:
metsw24-max
2026-10-06 06:43:50 +05:30
committed by GitHub
parent 6d1049462d
commit edc9760005
5 changed files with 184 additions and 70 deletions
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7
test/CMakeLists.txt
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@@ -146,6 +146,13 @@ if(HTTPLIB_IS_USING_OPENSSL)
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
COMMAND_ERROR_IS_FATAL ANY
)
# cert_san_types.pem: the bytes of each SAN read as the other type:
# DNS:a.zz is 97.46.122.122, IP:42.46.122.122 is "*.zz".
execute_process(
COMMAND ${OPENSSL_COMMAND} req -x509 -key key.pem -sha256 -days 3650 -nodes -subj /CN=san-types -addext subjectAltName=DNS:a.zz,IP:42.46.122.122 -out cert_san_types.pem
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
COMMAND_ERROR_IS_FATAL ANY
)
endif()
add_subdirectory(fuzzing)