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SSL: implement public key pinning

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Option --pinnedpubkey takes a path to a public key in DER format and
only connect if it matches (currently only implemented with OpenSSL).

Provides CURLOPT_PINNEDPUBLICKEY for curl_easy_setopt().

Extract a public RSA key from a website like so:
openssl s_client -connect google.com:443 2>&1 < /dev/null | \
sed -n '/-----BEGIN/,/-----END/p' | openssl x509 -noout -pubkey \
| openssl rsa -pubin -outform DER > google.com.der
This commit is contained in:
moparisthebest 2014-09-30 22:31:17 -04:00 • committed by Daniel Stenberg
parent d1b56d0043
commit 93e450793c
20 changed files with 311 additions and 2 deletions
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8
lib/url.c
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@ -1991,6 +1991,14 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
result = CURLE_NOT_BUILT_IN;
#endif
break;
case CURLOPT_PINNEDPUBLICKEY:
/*
* Set pinned public key for SSL connection.
* Specify file name of the public key in DER format.
*/
result = setstropt(&data->set.str[STRING_SSL_PINNEDPUBLICKEY],
va_arg(param, char *));
break;
case CURLOPT_CAINFO:
/*
* Set CA info for SSL connection. Specify file name of the CA certificate