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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <array>
#include "sslheaders.h"
#include <memory>
// Count of fields (not including SSL_HEADERS_FIELD_NONE).
#define NUMFIELDS (SSL_HEADERS_FIELD_MAX - 1)
namespace
{
struct _f {
const char *name;
ExpansionField field;
};
const std::array<_f, SSL_HEADERS_FIELD_MAX - 1> fields = {{
{"certificate", SSL_HEADERS_FIELD_CERTIFICATE},
{"subject", SSL_HEADERS_FIELD_SUBJECT},
{"issuer", SSL_HEADERS_FIELD_ISSUER},
{"serial", SSL_HEADERS_FIELD_SERIAL},
{"signature", SSL_HEADERS_FIELD_SIGNATURE},
{"notbefore", SSL_HEADERS_FIELD_NOTBEFORE},
{"notafter", SSL_HEADERS_FIELD_NOTAFTER},
}};
} // namespace
bool
SslHdrParseExpansion(const char *spec, SslHdrExpansion &exp)
{
const char *sep;
const char *selector;
// First, split on '=' to separate the header name from the SSL expansion.
sep = strchr(spec, '=');
if (sep == nullptr) {
SslHdrError("%s: missing '=' in SSL header expansion '%s'", PLUGIN_NAME, spec);
return false;
}
exp.name = std::string(spec, sep - spec);
selector = sep + 1;
// Next, split on '.' to separate the certificate selector from the field selector.
sep = strchr(selector, '.');
if (sep == nullptr) {
SslHdrError("%s: missing '.' in SSL header expansion '%s'", PLUGIN_NAME, spec);
return false;
}
if (strncmp(selector, "server.", 7) == 0) {
exp.scope = SSL_HEADERS_SCOPE_SERVER;
} else if (strncmp(selector, "client.", 7) == 0) {
exp.scope = SSL_HEADERS_SCOPE_CLIENT;
} else if (strncmp(selector, "ssl.", 4) == 0) {
exp.scope = SSL_HEADERS_SCOPE_SSL;
SslHdrError("%s: the SSL header expansion scope is not implemented: '%s'", PLUGIN_NAME, spec);
return false;
} else {
SslHdrError("%s: invalid SSL header expansion '%s'", PLUGIN_NAME, spec);
return false;
}
// Push sep to point to the field selector.
selector = sep + 1;
for (auto field : fields) {
if (strcmp(selector, field.name) == 0) {
exp.field = field.field;
return true;
}
}
SslHdrError("%s: invalid SSL certificate field selector '%s'", PLUGIN_NAME, spec);
return false;
}
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