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cli/vendor/aws-lc-sys/aws-lc/ssl/ssl_encoding_test.cc

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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0 OR ISC
#include <gtest/gtest.h>
#include <array>
#include "../crypto/test/test_util.h"
#include "internal.h"
#include "ssl_common_test.h"
BSSL_NAMESPACE_BEGIN
// kOpenSSLSession is a serialized SSL_SESSION.
static const char kOpenSSLSession[] =
"MIIFqgIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
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"i4gv7Y5oliyntgMBAQA=";
// kCustomSession is a custom serialized SSL_SESSION generated by
// filling in missing fields from |kOpenSSLSession|. This includes
// providing |peer_sha256|, so |peer| is not serialized.
static const char kCustomSession[] =
"MIIBZAIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
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"b+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYGBgYGBgYGBgYGBgYGBgYGBgYG"
"BgYGBgYGBgYGrgMEAQevAwQBBLADBAEF";
// kBoringSSLSession is a serialized SSL_SESSION generated from bssl client.
static const char kBoringSSLSession[] =
"MIIRwQIBAQICAwMEAsAvBCDdoGxGK26mR+8lM0uq6+k9xYuxPnwAjpcF9n0Yli9R"
"kQQwbyshfWhdi5XQ1++7n2L1qqrcVlmHBPpr6yknT/u4pUrpQB5FZ7vqvNn8MdHf"
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// kBadSessionExtraField is a custom serialized SSL_SESSION generated by
// replacing the final (optional) element of |kCustomSession| with tag
// number 99.
static const char kBadSessionExtraField[] =
"MIIBdgIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
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"q+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYG"
"BgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGrgMEAQevAwQBBOMDBAEF";
// kBadSessionVersion is a custom serialized SSL_SESSION generated by replacing
// the version of |kCustomSession| with 2.
static const char kBadSessionVersion[] =
"MIIBdgIBAgICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
"IWoJoQYCBFRDO46iBAICASykAwQBAqUDAgEUphAEDnd3dy5nb29nbGUuY29tqAcE"
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"CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yEOTDKPNj3+inbMaVigtK4PLyP"
"q+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYG"
"BgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGrgMEAQevAwQBBLADBAEF";
// kBadSessionTrailingData is a custom serialized SSL_SESSION with trailing data
// appended.
static const char kBadSessionTrailingData[] =
"MIIBdgIBAQICAwMEAsAvBCAG5Q1ndq4Yfmbeo1zwLkNRKmCXGdNgWvGT3cskV0yQ"
"kAQwJlrlzkAWBOWiLj/jJ76D7l+UXoizP2KI2C7I2FccqMmIfFmmkUy32nIJ0mZH"
"IWoJoQYCBFRDO46iBAICASykAwQBAqUDAgEUphAEDnd3dy5nb29nbGUuY29tqAcE"
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"CLoXFPoaMOe57dbBpXoro6Pd3BTbf/Tzr88K06yEOTDKPNj3+inbMaVigtK4PLyP"
"q+Topyzvx9USFgRvyuoxn0Hgb+R0A3j6SLRuyOdAi4gv7Y5oliynrSIEIAYGBgYG"
"BgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGBgYGrgMEAQevAwQBBLADBAEFAAAA";
static bool DecodeBase64(std::vector<uint8_t> *out, const char *in) {
size_t len = 0;
if (!EVP_DecodedLength(&len, strlen(in))) {
fprintf(stderr, "EVP_DecodedLength failed\n");
return false;
}
out->resize(len);
if (!EVP_DecodeBase64(out->data(), &len, len, (const uint8_t *)in,
strlen(in))) {
fprintf(stderr, "EVP_DecodeBase64 failed\n");
return false;
}
out->resize(len);
return true;
}
TEST(SSLTest, SessionEncoding) {
for (const char *input_b64 : {
kOpenSSLSession,
kCustomSession,
kBoringSSLSession,
}) {
SCOPED_TRACE(std::string(input_b64));
// Decode the input.
std::vector<uint8_t> input;
ASSERT_TRUE(DecodeBase64(&input, input_b64));
// Verify the SSL_SESSION decodes.
bssl::UniquePtr<SSL_CTX> ssl_ctx(SSL_CTX_new(TLS_method()));
ASSERT_TRUE(ssl_ctx);
bssl::UniquePtr<SSL_SESSION> session(
SSL_SESSION_from_bytes(input.data(), input.size(), ssl_ctx.get()));
ASSERT_TRUE(session) << "SSL_SESSION_from_bytes failed";
// Verify the SSL_SESSION encoding round-trips.
size_t encoded_len = 0;
bssl::UniquePtr<uint8_t> encoded;
uint8_t *encoded_raw = nullptr;
ASSERT_TRUE(SSL_SESSION_to_bytes(session.get(), &encoded_raw, &encoded_len))
<< "SSL_SESSION_to_bytes failed";
encoded.reset(encoded_raw);
EXPECT_EQ(Bytes(encoded.get(), encoded_len), Bytes(input))
<< "SSL_SESSION_to_bytes did not round-trip";
// Verify the SSL_SESSION also decodes with the legacy API.
const uint8_t *cptr = input.data();
session.reset(d2i_SSL_SESSION(NULL, &cptr, input.size()));
ASSERT_TRUE(session) << "d2i_SSL_SESSION failed";
EXPECT_EQ(cptr, input.data() + input.size());
// Verify the SSL_SESSION encoding round-trips via the legacy API.
int len = i2d_SSL_SESSION(session.get(), NULL);
ASSERT_GT(len, 0) << "i2d_SSL_SESSION failed";
ASSERT_EQ(static_cast<size_t>(len), input.size())
<< "i2d_SSL_SESSION(NULL) returned invalid length";
encoded.reset((uint8_t *)OPENSSL_malloc(input.size()));
ASSERT_TRUE(encoded);
uint8_t *ptr = encoded.get();
len = i2d_SSL_SESSION(session.get(), &ptr);
ASSERT_GT(len, 0) << "i2d_SSL_SESSION failed";
ASSERT_EQ(static_cast<size_t>(len), input.size())
<< "i2d_SSL_SESSION(NULL) returned invalid length";
ASSERT_EQ(ptr, encoded.get() + input.size())
<< "i2d_SSL_SESSION did not advance ptr correctly";
EXPECT_EQ(Bytes(encoded.get(), encoded_len), Bytes(input))
<< "SSL_SESSION_to_bytes did not round-trip";
// Verify that |i2d_SSL_SESSION| works correctly when |pp| is non-NULL, but
// |*pp| is NULL. A newly-allocated buffer containing the result should be
// created. See |i2d_SAMPLE| for more details.
uint8_t *ptr2 = nullptr;
int len2 = i2d_SSL_SESSION(session.get(), &ptr2);
ASSERT_TRUE(ptr2);
ASSERT_GT(len2, 0);
bssl::UniquePtr<uint8_t> encoded2(ptr2);
EXPECT_EQ(Bytes(encoded2.get(), len2), Bytes(input))
<< "SSL_SESSION_to_bytes did not round-trip";
}
for (const char *input_b64 : {
kBadSessionExtraField,
kBadSessionVersion,
kBadSessionTrailingData,
}) {
SCOPED_TRACE(std::string(input_b64));
std::vector<uint8_t> input;
ASSERT_TRUE(DecodeBase64(&input, input_b64));
// Verify that the SSL_SESSION fails to decode.
bssl::UniquePtr<SSL_CTX> ssl_ctx(SSL_CTX_new(TLS_method()));
ASSERT_TRUE(ssl_ctx);
bssl::UniquePtr<SSL_SESSION> session(
SSL_SESSION_from_bytes(input.data(), input.size(), ssl_ctx.get()));
EXPECT_FALSE(session) << "SSL_SESSION_from_bytes unexpectedly succeeded";
ERR_clear_error();
}
}
// CreateSessionWithTicket returns a sample |SSL_SESSION| with the specified
// version and ticket length or nullptr on failure.
static bssl::UniquePtr<SSL_SESSION> CreateSessionWithTicket(uint16_t version,
size_t ticket_len) {
std::vector<uint8_t> der;
if (!DecodeBase64(&der, kOpenSSLSession)) {
return nullptr;
}
bssl::UniquePtr<SSL_CTX> ssl_ctx(SSL_CTX_new(TLS_method()));
if (!ssl_ctx) {
return nullptr;
}
// Use a garbage ticket.
std::vector<uint8_t> ticket(ticket_len, 'a');
bssl::UniquePtr<SSL_SESSION> session(
SSL_SESSION_from_bytes(der.data(), der.size(), ssl_ctx.get()));
if (!session || !SSL_SESSION_set_protocol_version(session.get(), version) ||
!SSL_SESSION_set_ticket(session.get(), ticket.data(), ticket.size())) {
return nullptr;
}
// Fix up the timeout.
#if defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
SSL_SESSION_set_time(session.get(), 1234);
#else
SSL_SESSION_set_time(session.get(), time(nullptr));
#endif
return session;
}
// GetClientHelloLen creates a client SSL connection with the specified version
// and ticket length. It returns the length of the ClientHello, not including
// the record header, on success and zero on error.
static size_t GetClientHelloLen(uint16_t max_version, uint16_t session_version,
size_t ticket_len) {
bssl::UniquePtr<SSL_CTX> ctx(SSL_CTX_new(TLS_method()));
bssl::UniquePtr<SSL_SESSION> session =
CreateSessionWithTicket(session_version, ticket_len);
if (!ctx || !session) {
return 0;
}
// Set a one-element cipher list so the baseline ClientHello is unpadded.
bssl::UniquePtr<SSL> ssl(SSL_new(ctx.get()));
if (!ssl || !SSL_set_session(ssl.get(), session.get()) ||
!SSL_set_strict_cipher_list(ssl.get(), "ECDHE-RSA-AES128-GCM-SHA256") ||
!SSL_set1_curves_list(ssl.get(), "x25519:P-256:P-384") ||
!SSL_set_max_proto_version(ssl.get(), max_version)) {
return 0;
}
std::vector<uint8_t> client_hello;
if (!GetClientHello(ssl.get(), &client_hello) ||
client_hello.size() <= SSL3_RT_HEADER_LENGTH) {
return 0;
}
return client_hello.size() - SSL3_RT_HEADER_LENGTH;
}
TEST(SSLTest, Padding) {
struct PaddingVersions {
uint16_t max_version, session_version;
};
static const PaddingVersions kPaddingVersions[] = {
// Test the padding extension at TLS 1.2.
{TLS1_2_VERSION, TLS1_2_VERSION},
// Test the padding extension at TLS 1.3 with a TLS 1.2 session, so there
// will be no PSK binder after the padding extension.
{TLS1_3_VERSION, TLS1_2_VERSION},
// Test the padding extension at TLS 1.3 with a TLS 1.3 session, so there
// will be a PSK binder after the padding extension.
{TLS1_3_VERSION, TLS1_3_VERSION},
};
struct PaddingTest {
size_t input_len, padded_len;
};
static const PaddingTest kPaddingTests[] = {
// ClientHellos of length below 0x100 do not require padding.
{0xfe, 0xfe},
{0xff, 0xff},
// ClientHellos of length 0x100 through 0x1fb are padded up to 0x200.
{0x100, 0x200},
{0x123, 0x200},
{0x1fb, 0x200},
// ClientHellos of length 0x1fc through 0x1ff get padded beyond 0x200. The
// padding extension takes a minimum of four bytes plus one required
// content
// byte. (To work around yet more server bugs, we avoid empty final
// extensions.)
{0x1fc, 0x201},
{0x1fd, 0x202},
{0x1fe, 0x203},
{0x1ff, 0x204},
// Finally, larger ClientHellos need no padding.
{0x200, 0x200},
{0x201, 0x201},
};
for (const PaddingVersions &versions : kPaddingVersions) {
SCOPED_TRACE(versions.max_version);
SCOPED_TRACE(versions.session_version);
// Sample a baseline length.
size_t base_len =
GetClientHelloLen(versions.max_version, versions.session_version, 1);
ASSERT_NE(base_len, 0u) << "Baseline length could not be sampled";
for (const PaddingTest &test : kPaddingTests) {
SCOPED_TRACE(test.input_len);
ASSERT_LE(base_len, test.input_len) << "Baseline ClientHello too long";
size_t padded_len =
GetClientHelloLen(versions.max_version, versions.session_version,
1 + test.input_len - base_len);
EXPECT_EQ(padded_len, test.padded_len)
<< "ClientHello was not padded to expected length";
}
}
}
TEST(SSLTest, SessionPrint) {
static const std::array<std::string, 15> kExpectedTLS13{
{"SSL-Session:", " Protocol :", " Cipher : ",
" Session-ID: ", " Session-ID-ctx:", " Resumption PSK:",
" PSK identity:", " TLS session ticket lifetime hint:",
" TLS session ticket:", " 61",
" Start Time:", " Timeout :", " Verify return code:",
" Extended master secret:", " Max Early Data:"}};
static const std::array<std::string, 14> kExpectedTLS12{
{"SSL-Session:", " Protocol :", " Cipher : ",
" Session-ID: ", " Session-ID-ctx:", " Master-Key:",
" PSK identity:", " TLS session ticket lifetime hint:",
" TLS session ticket:", " 61",
" Start Time:", " Timeout :", " Verify return code:",
" Extended master secret:"}};
bssl::UniquePtr<SSL_SESSION> session(
CreateSessionWithTicket(TLS1_3_VERSION, 10));
bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_mem()));
EXPECT_TRUE(SSL_SESSION_print(bio.get(), session.get()));
const uint8_t *out = nullptr;
size_t outlen = 0;
ASSERT_TRUE(BIO_mem_contents(bio.get(), &out, &outlen));
// Iterate through |kExpectedTLS13| and verify that |SSL_SESSION_print| has
// the expected format.
std::istringstream iss_tls13((std::string((char *)out, outlen)));
std::string line;
for (const auto &expected : kExpectedTLS13) {
std::getline(iss_tls13, line);
EXPECT_EQ(line.substr(0, expected.length()), expected);
}
session = CreateSessionWithTicket(TLS1_2_VERSION, 10);
bio.reset(BIO_new(BIO_s_mem()));
EXPECT_TRUE(SSL_SESSION_print(bio.get(), session.get()));
ASSERT_TRUE(BIO_mem_contents(bio.get(), &out, &outlen));
// Iterate through |kExpectedTLS12| and verify that |SSL_SESSION_print| has
// the expected format.
std::istringstream iss_tls12((std::string((char *)out, outlen)));
for (const auto &expected : kExpectedTLS12) {
std::getline(iss_tls12, line);
EXPECT_EQ(line.substr(0, expected.length()), expected);
}
}
BSSL_NAMESPACE_END