mirror of https://github.com/grpc/grpc.git
Merge pull request #24834 from yashykt/addsanstocheck
Add SANs matching for xDS credentialspull/24938/head
Yash Tibrewal
4 years ago
committed by
GitHub
commit
8d9b37362c
35 changed files with 1292 additions and 177 deletions
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//
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//
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// Copyright 2020 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/security/credentials/tls/tls_utils.h" |
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#include "absl/strings/ascii.h" |
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#include "absl/strings/match.h" |
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#include "absl/strings/str_cat.h" |
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namespace grpc_core { |
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// Based on
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// https://github.com/grpc/grpc-java/blob/ca12e7a339add0ef48202fb72434b9dc0df41756/xds/src/main/java/io/grpc/xds/internal/sds/trust/SdsX509TrustManager.java#L62
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bool VerifySubjectAlternativeName(absl::string_view subject_alternative_name, |
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const std::string& matcher) { |
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if (subject_alternative_name.empty() || |
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absl::StartsWith(subject_alternative_name, ".")) { |
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// Illegal pattern/domain name
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return false; |
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} |
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if (matcher.empty() || absl::StartsWith(matcher, ".")) { |
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// Illegal domain name
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return false; |
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} |
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// Normalize \a subject_alternative_name and \a matcher by turning them into
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// absolute domain names if they are not yet absolute. This is needed because
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// server certificates do not normally contain absolute names or patterns, but
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// they should be treated as absolute. At the same time, any
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// subject_alternative_name presented to this method should also be treated as
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// absolute for the purposes of matching to the server certificate.
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std::string normalized_san = |
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absl::EndsWith(subject_alternative_name, ".") |
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? std::string(subject_alternative_name) |
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: absl::StrCat(subject_alternative_name, "."); |
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std::string normalized_matcher = |
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absl::EndsWith(matcher, ".") ? matcher : absl::StrCat(matcher, "."); |
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absl::AsciiStrToLower(&normalized_san); |
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absl::AsciiStrToLower(&normalized_matcher); |
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if (!absl::StrContains(normalized_san, "*")) { |
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return normalized_san == normalized_matcher; |
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} |
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// WILDCARD PATTERN RULES:
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// 1. Asterisk (*) is only permitted in the left-most domain name label and
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// must be the only character in that label (i.e., must match the whole
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// left-most label). For example, *.example.com is permitted, while
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// *a.example.com, a*.example.com, a*b.example.com, a.*.example.com are
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// not permitted.
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// 2. Asterisk (*) cannot match across domain name labels.
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// For example, *.example.com matches test.example.com but does not match
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// sub.test.example.com.
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// 3. Wildcard patterns for single-label domain names are not permitted.
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if (!absl::StartsWith(normalized_san, "*.")) { |
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// Asterisk (*) is only permitted in the left-most domain name label and
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// must be the only character in that label
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return false; |
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} |
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if (normalized_san == "*.") { |
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// Wildcard pattern for single-label domain name -- not permitted.
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return false; |
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} |
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absl::string_view suffix = absl::string_view(normalized_san).substr(1); |
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if (absl::StrContains(suffix, "*")) { |
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// Asterisk (*) is not permitted in the suffix
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return false; |
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} |
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if (!absl::EndsWith(normalized_matcher, suffix)) return false; |
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int suffix_start_index = normalized_matcher.length() - suffix.length(); |
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// Asterisk matching across domain labels is not permitted.
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return suffix_start_index <= 0 /* should not happen */ || |
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normalized_matcher.find_last_of('.', suffix_start_index - 1) == |
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std::string::npos; |
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} |
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} // namespace grpc_core
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@ -0,0 +1,38 @@ |
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//
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//
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// Copyright 2020 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//
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#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_TLS_TLS_UTILS_H |
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#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_TLS_TLS_UTILS_H |
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#include <grpc/support/port_platform.h> |
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#include <string> |
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#include <vector> |
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#include "absl/strings/string_view.h" |
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namespace grpc_core { |
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// Matches \a subject_alternative_name with \a matcher. Returns true if there
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// is a match, false otherwise.
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bool VerifySubjectAlternativeName(absl::string_view subject_alternative_name, |
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const std::string& matcher); |
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} // namespace grpc_core
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#endif // GRPC_CORE_LIB_SECURITY_CREDENTIALS_TLS_TLS_UTILS_H
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@ -0,0 +1,306 @@ |
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//
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//
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// Copyright 2020 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//
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#include "src/core/lib/security/credentials/xds/xds_credentials.h" |
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#include <gtest/gtest.h> |
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#include <grpc/grpc.h> |
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#include "test/core/util/test_config.h" |
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namespace grpc_core { |
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namespace testing { |
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namespace { |
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XdsApi::StringMatcher ExactMatcher(const char* string) { |
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return XdsApi::StringMatcher(XdsApi::StringMatcher::StringMatcherType::EXACT, |
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string); |
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} |
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XdsApi::StringMatcher PrefixMatcher(const char* string, |
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bool ignore_case = false) { |
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return XdsApi::StringMatcher(XdsApi::StringMatcher::StringMatcherType::PREFIX, |
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string, ignore_case); |
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} |
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XdsApi::StringMatcher SuffixMatcher(const char* string, |
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bool ignore_case = false) { |
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return XdsApi::StringMatcher(XdsApi::StringMatcher::StringMatcherType::SUFFIX, |
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string, ignore_case); |
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} |
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XdsApi::StringMatcher ContainsMatcher(const char* string, |
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bool ignore_case = false) { |
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return XdsApi::StringMatcher( |
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XdsApi::StringMatcher::StringMatcherType::CONTAINS, string, ignore_case); |
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} |
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XdsApi::StringMatcher SafeRegexMatcher(const char* string) { |
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return XdsApi::StringMatcher( |
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XdsApi::StringMatcher::StringMatcherType::SAFE_REGEX, string); |
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} |
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TEST(XdsSanMatchingTest, EmptySansList) { |
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std::vector<const char*> sans = {}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ExactMatcher("a.example.com"), ExactMatcher("b.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, EmptyMatchersList) { |
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std::vector<const char*> sans = {"a.example.com", "foo.example.com"}; |
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EXPECT_TRUE( |
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TestOnlyXdsVerifySubjectAlternativeNames(sans.data(), sans.size(), {})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchIllegalValues) { |
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std::vector<const char*> sans = {".a.example.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ExactMatcher(""), ExactMatcher("a.example.com"), |
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ExactMatcher(".a.example.com")})); |
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sans = {""}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ExactMatcher(""), ExactMatcher("a.example.com"), |
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ExactMatcher(".a.example.com")})); |
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sans = {"a.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ExactMatcher(""), ExactMatcher("a.example.com"), |
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ExactMatcher(".a.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchDns) { |
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std::vector<const char*> sans = {"a.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("b.example.com")})); |
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sans = {"b.example.com."}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com.")})); |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("b.example.com.")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchWithFullyQualifiedSan) { |
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std::vector<const char*> sans = {"a.example.com."}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("b.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchWithFullyQualifiedMatcher) { |
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std::vector<const char*> sans = {"a.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com.")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("b.example.com.")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchDnsCaseInsensitive) { |
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std::vector<const char*> sans = {"A.eXaMpLe.CoM"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com")})); |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.ExAmPlE.cOm")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchMultipleSansMultipleMatchers) { |
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std::vector<const char*> sans = {"a.example.com", "foo.example.com", |
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"b.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ExactMatcher("abc.example.com"), ExactMatcher("foo.example.com"), |
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ExactMatcher("xyz.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchWildCard) { |
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std::vector<const char*> sans = {"*.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("a.example.com")})); |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("fOo.ExAmPlE.cOm")})); |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("BaR.eXaMpLe.CoM")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher(".example.com")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("example.com")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("foo.bar.com")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchWildCardDoesNotMatchSingleLabelDomain) { |
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std::vector<const char*> sans = {"*"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.com.")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("bar.baz.com")})); |
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sans = {"*."}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.com.")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("bar.baz.com")})); |
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} |
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TEST(XdsSanMatchingTest, ExactMatchAsteriskOnlyPermittedInLeftMostDomainName) { |
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std::vector<const char*> sans = {"*.example.*.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.example.xyz.com")})); |
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sans = {"*.exam*ple.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, |
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ExactMatchAsteriskMustBeOnlyCharacterInLeftMostDomainName) { |
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std::vector<const char*> sans = {"*c.example.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.example.com")})); |
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} |
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TEST(XdsSanMatchingTest, |
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ExactMatchAsteriskMatchingAcrossDomainLabelsNotPermitted) { |
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std::vector<const char*> sans = {"*.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.example.com")})); |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("foo.bar.baz.com")})); |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ExactMatcher("abc.com")})); |
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} |
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TEST(XdsSanMatchingTest, PrefixMatch) { |
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std::vector<const char*> sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames(sans.data(), sans.size(), |
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{PrefixMatcher("abc")})); |
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sans = {"AbC.CoM"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {PrefixMatcher("abc")})); |
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sans = {"xyz.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {PrefixMatcher("abc")})); |
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} |
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TEST(XdsSanMatchingTest, PrefixMatchIgnoreCase) { |
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std::vector<const char*> sans = {"aBc.cOm"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{PrefixMatcher("AbC", true /* ignore_case */)})); |
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sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{PrefixMatcher("AbC", true /* ignore_case */)})); |
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sans = {"xyz.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{PrefixMatcher("AbC", true /* ignore_case */)})); |
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} |
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|
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TEST(XdsSanMatchingTest, SuffixMatch) { |
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std::vector<const char*> sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SuffixMatcher(".com")})); |
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sans = {"AbC.CoM"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SuffixMatcher(".com")})); |
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sans = {"abc.xyz"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SuffixMatcher(".com")})); |
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} |
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|
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TEST(XdsSanMatchingTest, SuffixMatchIgnoreCase) { |
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std::vector<const char*> sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{SuffixMatcher(".CoM", true /* ignore_case */)})); |
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sans = {"AbC.cOm"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{SuffixMatcher(".CoM", true /* ignore_case */)})); |
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sans = {"abc.xyz"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{SuffixMatcher(".CoM", true /* ignore_case */)})); |
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} |
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|
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TEST(XdsSanMatchingTest, ContainsMatch) { |
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std::vector<const char*> sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ContainsMatcher("abc")})); |
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sans = {"xyz.abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ContainsMatcher("abc")})); |
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sans = {"foo.AbC.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {ContainsMatcher("abc")})); |
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} |
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|
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TEST(XdsSanMatchingTest, ContainsMatchIgnoresCase) { |
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std::vector<const char*> sans = {"abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ContainsMatcher("AbC", true /* ignore_case */)})); |
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sans = {"xyz.abc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ContainsMatcher("AbC", true /* ignore_case */)})); |
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sans = {"foo.aBc.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ContainsMatcher("AbC", true /* ignore_case */)})); |
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sans = {"foo.Ab.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), |
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{ContainsMatcher("AbC", true /* ignore_case */)})); |
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} |
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|
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TEST(XdsSanMatchingTest, RegexMatch) { |
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std::vector<const char*> sans = {"abc.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SafeRegexMatcher("(abc|xyz).example.com")})); |
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sans = {"xyz.example.com"}; |
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EXPECT_TRUE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SafeRegexMatcher("(abc|xyz).example.com")})); |
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sans = {"foo.example.com"}; |
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EXPECT_FALSE(TestOnlyXdsVerifySubjectAlternativeNames( |
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sans.data(), sans.size(), {SafeRegexMatcher("(abc|xyz).example.com")})); |
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} |
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|
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} // namespace
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|
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} // namespace testing
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} // namespace grpc_core
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int main(int argc, char** argv) { |
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::testing::InitGoogleTest(&argc, argv); |
||||
grpc::testing::TestEnvironment env(argc, argv); |
||||
grpc_init(); |
||||
auto result = RUN_ALL_TESTS(); |
||||
grpc_shutdown(); |
||||
return result; |
||||
} |
||||
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Reference in new issue