1 //
2 //
3 // Copyright 2018 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18
19 #include "src/core/tsi/alts/frame_protector/frame_handler.h"
20
21 #include <stdint.h>
22 #include <stdio.h>
23 #include <string.h>
24
25 #include <algorithm>
26
27 #include <gtest/gtest.h>
28
29 #include <grpc/support/alloc.h>
30 #include <grpc/support/log.h>
31
32 #include "src/core/lib/gpr/useful.h"
33 #include "src/core/lib/gprpp/crash.h"
34 #include "test/core/tsi/alts/crypt/gsec_test_util.h"
35
36 const size_t kFrameHandlerTestBufferSize = 1024;
37
38 typedef struct frame_handler {
39 alts_frame_writer* writer;
40 alts_frame_reader* reader;
41 unsigned char* buffer;
42 size_t buffer_size;
43 } frame_handler;
44
frame_length(size_t payload_length)45 static size_t frame_length(size_t payload_length) {
46 return payload_length + kFrameHeaderSize;
47 }
48
create_frame_handler()49 static frame_handler* create_frame_handler() {
50 frame_handler* handler =
51 static_cast<frame_handler*>(gpr_malloc(sizeof(frame_handler)));
52 handler->writer = alts_create_frame_writer();
53 handler->reader = alts_create_frame_reader();
54 handler->buffer = nullptr;
55 handler->buffer_size = 0;
56 return handler;
57 }
58
destroy_frame_handler(frame_handler * handler)59 static void destroy_frame_handler(frame_handler* handler) {
60 if (handler != nullptr) {
61 alts_destroy_frame_reader(handler->reader);
62 alts_destroy_frame_writer(handler->writer);
63 if (handler->buffer != nullptr) gpr_free(handler->buffer);
64 gpr_free(handler);
65 }
66 }
67
frame(frame_handler * handler,unsigned char * payload,size_t payload_length,size_t write_length)68 static void frame(frame_handler* handler, unsigned char* payload,
69 size_t payload_length, size_t write_length) {
70 handler->buffer_size = frame_length(payload_length);
71 handler->buffer =
72 static_cast<unsigned char*>(gpr_malloc(handler->buffer_size));
73 ASSERT_TRUE(
74 alts_reset_frame_writer(handler->writer, payload, payload_length));
75 size_t offset = 0;
76 while (offset < handler->buffer_size &&
77 !alts_is_frame_writer_done(handler->writer)) {
78 size_t bytes_written =
79 std::min(write_length, handler->buffer_size - offset);
80 ASSERT_TRUE(alts_write_frame_bytes(
81 handler->writer, handler->buffer + offset, &bytes_written));
82 offset += bytes_written;
83 }
84 ASSERT_TRUE(alts_is_frame_writer_done(handler->writer));
85 ASSERT_EQ(handler->buffer_size, offset);
86 }
87
deframe(frame_handler * handler,unsigned char * bytes,size_t read_length)88 static size_t deframe(frame_handler* handler, unsigned char* bytes,
89 size_t read_length) {
90 EXPECT_TRUE(alts_reset_frame_reader(handler->reader, bytes));
91 size_t offset = 0;
92 while (offset < handler->buffer_size &&
93 !alts_is_frame_reader_done(handler->reader)) {
94 size_t bytes_read = std::min(read_length, handler->buffer_size - offset);
95 EXPECT_TRUE(alts_read_frame_bytes(handler->reader, handler->buffer + offset,
96 &bytes_read));
97 offset += bytes_read;
98 }
99 EXPECT_TRUE(alts_is_frame_reader_done(handler->reader));
100 EXPECT_EQ(handler->buffer_size, offset);
101 return offset - handler->reader->header_bytes_read;
102 }
103
frame_n_deframe(frame_handler * handler,unsigned char * payload,size_t payload_length,size_t write_length,size_t read_length)104 static void frame_n_deframe(frame_handler* handler, unsigned char* payload,
105 size_t payload_length, size_t write_length,
106 size_t read_length) {
107 frame(handler, payload, payload_length, write_length);
108 unsigned char* bytes =
109 static_cast<unsigned char*>(gpr_malloc(kFrameHandlerTestBufferSize));
110 size_t deframed_payload_length = deframe(handler, bytes, read_length);
111 ASSERT_EQ(payload_length, deframed_payload_length);
112 ASSERT_EQ(memcmp(payload, bytes, payload_length), 0);
113 gpr_free(bytes);
114 }
115
TEST(FrameHandlerTest,FrameHandlerTestFrameDeframe)116 TEST(FrameHandlerTest, FrameHandlerTestFrameDeframe) {
117 unsigned char payload[] = "hello world";
118 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
119 frame_handler* handler = create_frame_handler();
120 frame_n_deframe(handler, payload, payload_length,
121 frame_length(payload_length), frame_length(payload_length));
122 destroy_frame_handler(handler);
123 }
124
TEST(FrameHandlerTest,FrameHandlerTestSmallBuffer)125 TEST(FrameHandlerTest, FrameHandlerTestSmallBuffer) {
126 unsigned char payload[] = "hello world";
127 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
128 frame_handler* handler = create_frame_handler();
129 frame_n_deframe(handler, payload, payload_length, 1, 1);
130 destroy_frame_handler(handler);
131 }
132
TEST(FrameHandlerTest,FrameHandlerTestNullInputStream)133 TEST(FrameHandlerTest, FrameHandlerTestNullInputStream) {
134 frame_handler* handler = create_frame_handler();
135 ASSERT_FALSE(alts_reset_frame_writer(handler->writer, nullptr, 0));
136 destroy_frame_handler(handler);
137 }
138
TEST(FrameHandlerTest,FrameHandlerTestBadInputLength)139 TEST(FrameHandlerTest, FrameHandlerTestBadInputLength) {
140 unsigned char payload[] = "hello world";
141 frame_handler* handler = create_frame_handler();
142 ASSERT_FALSE(alts_reset_frame_writer(handler->writer, payload, SIZE_MAX));
143 destroy_frame_handler(handler);
144 }
145
TEST(FrameHandlerTest,FrameHandlerTestNullWriterByteLength)146 TEST(FrameHandlerTest, FrameHandlerTestNullWriterByteLength) {
147 unsigned char payload[] = "hello world";
148 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
149 frame_handler* handler = create_frame_handler();
150 ASSERT_TRUE(
151 alts_reset_frame_writer(handler->writer, payload, payload_length));
152 ASSERT_TRUE(
153 !alts_write_frame_bytes(handler->writer, handler->buffer, nullptr));
154 destroy_frame_handler(handler);
155 }
156
TEST(FrameHandlerTest,FrameHandlerTestNullWriterBytes)157 TEST(FrameHandlerTest, FrameHandlerTestNullWriterBytes) {
158 unsigned char payload[] = "hello world";
159 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
160 frame_handler* handler = create_frame_handler();
161 ASSERT_TRUE(
162 alts_reset_frame_writer(handler->writer, payload, payload_length));
163 ASSERT_TRUE(
164 !alts_write_frame_bytes(handler->writer, nullptr, &payload_length));
165 destroy_frame_handler(handler);
166 }
167
TEST(FrameHandlerTest,FrameHandlerTestBadFrameLength)168 TEST(FrameHandlerTest, FrameHandlerTestBadFrameLength) {
169 unsigned char payload[] = "hello world";
170 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
171 frame_handler* handler = create_frame_handler();
172 frame(handler, payload, payload_length, payload_length);
173 memset(handler->buffer, 0x00, kFrameLengthFieldSize);
174 unsigned char* bytes =
175 static_cast<unsigned char*>(gpr_malloc(kFrameHandlerTestBufferSize));
176 ASSERT_TRUE(alts_reset_frame_reader(handler->reader, bytes));
177 size_t bytes_read = handler->buffer_size;
178 ASSERT_TRUE(
179 !alts_read_frame_bytes(handler->reader, handler->buffer, &bytes_read));
180 ASSERT_TRUE(alts_is_frame_reader_done(handler->reader));
181 ASSERT_EQ(bytes_read, 0);
182 gpr_free(bytes);
183 destroy_frame_handler(handler);
184 }
185
TEST(FrameHandlerTest,FrameHandlerTestUnsupportedMessageType)186 TEST(FrameHandlerTest, FrameHandlerTestUnsupportedMessageType) {
187 unsigned char payload[] = "hello world";
188 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
189 frame_handler* handler = create_frame_handler();
190 frame(handler, payload, payload_length, payload_length);
191 memset(handler->buffer + kFrameLengthFieldSize, 0x00,
192 kFrameMessageTypeFieldSize);
193 unsigned char* bytes =
194 static_cast<unsigned char*>(gpr_malloc(kFrameHandlerTestBufferSize));
195 ASSERT_TRUE(alts_reset_frame_reader(handler->reader, bytes));
196 size_t bytes_read = handler->buffer_size;
197 ASSERT_TRUE(
198 !alts_read_frame_bytes(handler->reader, handler->buffer, &bytes_read));
199 ASSERT_TRUE(alts_is_frame_reader_done(handler->reader));
200 ASSERT_EQ(bytes_read, 0);
201 gpr_free(bytes);
202 destroy_frame_handler(handler);
203 }
204
TEST(FrameHandlerTest,FrameHandlerTestNullOutputStream)205 TEST(FrameHandlerTest, FrameHandlerTestNullOutputStream) {
206 unsigned char payload[] = "hello world";
207 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
208 frame_handler* handler = create_frame_handler();
209 frame(handler, payload, payload_length, payload_length);
210 ASSERT_FALSE(alts_reset_frame_reader(handler->reader, nullptr));
211 destroy_frame_handler(handler);
212 }
213
TEST(FrameHandlerTest,FrameHandlerTestNullReaderByteLength)214 TEST(FrameHandlerTest, FrameHandlerTestNullReaderByteLength) {
215 unsigned char payload[] = "hello world";
216 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
217 frame_handler* handler = create_frame_handler();
218 frame(handler, payload, payload_length, payload_length);
219 unsigned char* bytes =
220 static_cast<unsigned char*>(gpr_malloc(kFrameHandlerTestBufferSize));
221 ASSERT_TRUE(alts_reset_frame_reader(handler->reader, bytes));
222 ASSERT_FALSE(
223 alts_read_frame_bytes(handler->reader, handler->buffer, nullptr));
224 gpr_free(bytes);
225 destroy_frame_handler(handler);
226 }
227
TEST(FrameHandlerTest,FrameHandlerTestNullReaderBytes)228 TEST(FrameHandlerTest, FrameHandlerTestNullReaderBytes) {
229 unsigned char payload[] = "hello world";
230 size_t payload_length = strlen(reinterpret_cast<char*>(payload)) + 1;
231 frame_handler* handler = create_frame_handler();
232 frame(handler, payload, payload_length, payload_length);
233 unsigned char* bytes =
234 static_cast<unsigned char*>(gpr_malloc(kFrameHandlerTestBufferSize));
235 ASSERT_TRUE(alts_reset_frame_reader(handler->reader, bytes));
236 size_t bytes_read = handler->buffer_size;
237 ASSERT_FALSE(alts_read_frame_bytes(handler->reader, nullptr, &bytes_read));
238 gpr_free(bytes);
239 destroy_frame_handler(handler);
240 }
241
main(int argc,char ** argv)242 int main(int argc, char** argv) {
243 ::testing::InitGoogleTest(&argc, argv);
244 return RUN_ALL_TESTS();
245 }
246