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56 lines
2.2 KiB
56 lines
2.2 KiB
/* Obtained from: https://github.com/iSECPartners/ssl-conservatory */ |
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/* |
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Copyright (C) 2012, iSEC Partners. |
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Permission is hereby granted, free of charge, to any person obtaining a copy of |
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this software and associated documentation files (the "Software"), to deal in |
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the Software without restriction, including without limitation the rights to |
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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of the Software, and to permit persons to whom the Software is furnished to do |
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so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included in all |
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copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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SOFTWARE. |
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*/ |
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/* |
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* Helper functions to perform basic hostname validation using OpenSSL. |
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* |
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* Please read "everything-you-wanted-to-know-about-openssl.pdf" before |
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* attempting to use this code. This whitepaper describes how the code works, |
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* how it should be used, and what its limitations are. |
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* |
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* Author: Alban Diquet |
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* License: See LICENSE |
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* |
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*/ |
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typedef enum { |
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MatchFound, |
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MatchNotFound, |
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NoSANPresent, |
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MalformedCertificate, |
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Error |
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} HostnameValidationResult; |
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/** |
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* Validates the server's identity by looking for the expected hostname in the |
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* server's certificate. As described in RFC 6125, it first tries to find a match |
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* in the Subject Alternative Name extension. If the extension is not present in |
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* the certificate, it checks the Common Name instead. |
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* |
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* Returns MatchFound if a match was found. |
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* Returns MatchNotFound if no matches were found. |
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* Returns MalformedCertificate if any of the hostnames had a NUL character embedded in it. |
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* Returns Error if there was an error. |
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*/ |
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HostnameValidationResult validate_hostname(const char *hostname, const X509 *server_cert);
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