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darwinssl: add support for ALPN negotiation

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This commit is contained in:
Rodger Combs 2018-07-11 02:45:14 -05:00 committed by Nick Zitzmann
parent 8c00412428
commit 092f6815c8
2 changed files with 71 additions and 8 deletions
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1
docs/HTTP2.md
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@ -63,6 +63,7 @@ the necessary TLS features. Right now we support:
- mbedTLS: ALPN
- SChannel: ALPN
- wolfSSL: ALPN
- Secure Transport: ALPN
Multiplexing
------------

62
lib/vtls/darwinssl.c
View File

@ -1573,6 +1573,35 @@ static CURLcode darwinssl_connect_step1(struct connectdata *conn,
}
#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */
#if (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1
if(conn->bits.tls_enable_alpn) {
if(__builtin_available(macOS 10.13.4, iOS 11, *)) {
CFMutableArrayRef alpnArr = CFArrayCreateMutable(NULL, 0,
&kCFTypeArrayCallBacks);
#ifdef USE_NGHTTP2
if(data->set.httpversion >= CURL_HTTP_VERSION_2 &&
(!SSL_IS_PROXY() || !conn->bits.tunnel_proxy)) {
CFArrayAppendValue(alpnArr, CFSTR(NGHTTP2_PROTO_VERSION_ID));
infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
}
#endif
CFArrayAppendValue(alpnArr, CFSTR(ALPN_HTTP_1_1));
infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1);
/* expects length prefixed preference ordered list of protocols in wire
* format
*/
err = SSLSetALPNProtocols(BACKEND->ssl_ctx, alpnArr);
if(err != noErr)
infof(data, "WARNING: failed to set ALPN protocols; OSStatus %d\n",
err);
CFRelease(alpnArr);
}
}
#endif
if(SSL_SET_OPTION(key)) {
infof(data, "WARNING: SSL: CURLOPT_SSLKEY is ignored by Secure "
"Transport. The private key must be in the Keychain.\n");
@ -2467,6 +2496,39 @@ darwinssl_connect_step2(struct connectdata *conn, int sockindex)
break;
}
#if(CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1
if(conn->bits.tls_enable_alpn) {
if(__builtin_available(macOS 10.13.4, iOS 11, *)) {
CFArrayRef alpnArr = NULL;
CFStringRef chosenProtocol = NULL;
err = SSLCopyALPNProtocols(BACKEND->ssl_ctx, &alpnArr);
if(err == noErr && alpnArr && CFArrayGetCount(alpnArr) >= 1)
chosenProtocol = CFArrayGetValueAtIndex(alpnArr, 0);
#ifdef USE_NGHTTP2
if(chosenProtocol &&
!CFStringCompare(chosenProtocol, CFSTR(NGHTTP2_PROTO_VERSION_ID),
0)) {
conn->negnpn = CURL_HTTP_VERSION_2;
}
else
#endif
if(chosenProtocol &&
!CFStringCompare(chosenProtocol, CFSTR(ALPN_HTTP_1_1), 0)) {
conn->negnpn = CURL_HTTP_VERSION_1_1;
}
else
infof(data, "ALPN, server did not agree to a protocol\n");
/* chosenProtocol is a reference to the string within alpnArr
and doesn't need to be freed separately */
if(alpnArr)
CFRelease(alpnArr);
}
}
#endif
return CURLE_OK;
}
}