crypto/digest_extra/digest_test.cc - boringssl - Git at Google

 /* Copyright (c) 2014, Google Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>

 #include <memory>

 #include <gtest/gtest.h>

 #include <openssl/asn1.h>
 #include <openssl/bytestring.h>
 #include <openssl/crypto.h>
 #include <openssl/digest.h>
 #include <openssl/err.h>
 #include <openssl/md4.h>
 #include <openssl/md5.h>
 #include <openssl/nid.h>
 #include <openssl/obj.h>
 #include <openssl/sha.h>

 #include "../internal.h"
 #include "../test/test_util.h"


 struct MD {
   // name is the name of the digest.
   const char* name;
   // md_func is the digest to test.
   const EVP_MD *(*func)(void);
   // one_shot_func is the convenience one-shot version of the
   // digest.
   uint8_t *(*one_shot_func)(const uint8_t *, size_t, uint8_t *);
 };

 static const MD md4 = { "MD4", &EVP_md4, nullptr };
 static const MD md5 = { "MD5", &EVP_md5, &MD5 };
 static const MD sha1 = { "SHA1", &EVP_sha1, &SHA1 };
 static const MD sha224 = { "SHA224", &EVP_sha224, &SHA224 };
 static const MD sha256 = { "SHA256", &EVP_sha256, &SHA256 };
 static const MD sha384 = { "SHA384", &EVP_sha384, &SHA384 };
 static const MD sha512 = { "SHA512", &EVP_sha512, &SHA512 };
 static const MD md5_sha1 = { "MD5-SHA1", &EVP_md5_sha1, nullptr };

 struct TestVector {
   // md is the digest to test.
   const MD &md;
   // input is a NUL-terminated string to hash.
   const char *input;
   // repeat is the number of times to repeat input.
   size_t repeat;
   // expected_hex is the expected digest in hexadecimal.
   const char *expected_hex;
 };

 static const TestVector kTestVectors[] = {
     // MD4 tests, from RFC 1320. (crypto/md4 does not provide a
     // one-shot MD4 function.)
     { md4, "", 1, "31d6cfe0d16ae931b73c59d7e0c089c0" },
     { md4, "a", 1, "bde52cb31de33e46245e05fbdbd6fb24" },
     { md4, "abc", 1, "a448017aaf21d8525fc10ae87aa6729d" },
     { md4, "message digest", 1, "d9130a8164549fe818874806e1c7014b" },
     { md4, "abcdefghijklmnopqrstuvwxyz", 1,
       "d79e1c308aa5bbcdeea8ed63df412da9" },
     { md4,
       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 1,
       "043f8582f241db351ce627e153e7f0e4" },
     { md4, "1234567890", 8, "e33b4ddc9c38f2199c3e7b164fcc0536" },

     // MD5 tests, from RFC 1321.
     { md5, "", 1, "d41d8cd98f00b204e9800998ecf8427e" },
     { md5, "a", 1, "0cc175b9c0f1b6a831c399e269772661" },
     { md5, "abc", 1, "900150983cd24fb0d6963f7d28e17f72" },
     { md5, "message digest", 1, "f96b697d7cb7938d525a2f31aaf161d0" },
     { md5, "abcdefghijklmnopqrstuvwxyz", 1,
       "c3fcd3d76192e4007dfb496cca67e13b" },
     { md5,
       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 1,
       "d174ab98d277d9f5a5611c2c9f419d9f" },
     { md5, "1234567890", 8, "57edf4a22be3c955ac49da2e2107b67a" },

     // SHA-1 tests, from RFC 3174.
     { sha1, "abc", 1, "a9993e364706816aba3e25717850c26c9cd0d89d" },
     { sha1,
       "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
       "84983e441c3bd26ebaae4aa1f95129e5e54670f1" },
     { sha1, "a", 1000000, "34aa973cd4c4daa4f61eeb2bdbad27316534016f" },
     { sha1,
       "0123456701234567012345670123456701234567012345670123456701234567", 10,
       "dea356a2cddd90c7a7ecedc5ebb563934f460452" },

     // SHA-224 tests, from RFC 3874.
     { sha224, "abc", 1,
       "23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7" },
     { sha224,
       "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
       "75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525" },
     { sha224,
       "a", 1000000,
       "20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67" },

     // SHA-256 tests, from NIST.
     { sha256, "abc", 1,
       "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad" },
     { sha256,
       "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
       "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1" },

     // SHA-384 tests, from NIST.
     { sha384, "abc", 1,
       "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"
       "8086072ba1e7cc2358baeca134c825a7" },
     { sha384,
       "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
       "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", 1,
       "09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"
       "fcc7c71a557e2db966c3e9fa91746039" },

     // SHA-512 tests, from NIST.
     { sha512, "abc", 1,
       "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"
       "2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f" },
     { sha512,
       "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
       "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", 1,
       "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"
       "501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909" },

     // MD5-SHA1 tests.
     { md5_sha1, "abc", 1,
       "900150983cd24fb0d6963f7d28e17f72a9993e364706816aba3e25717850c26c9cd0d89d" },
 };

 static void CompareDigest(const TestVector *test,
                           const uint8_t *digest,
                           size_t digest_len) {
   static const char kHexTable[] = "0123456789abcdef";
   char digest_hex[2*EVP_MAX_MD_SIZE + 1];

   for (size_t i = 0; i < digest_len; i++) {
     digest_hex[2*i] = kHexTable[digest[i] >> 4];
     digest_hex[2*i + 1] = kHexTable[digest[i] & 0xf];
   }
   digest_hex[2*digest_len] = '\0';

   EXPECT_STREQ(test->expected_hex, digest_hex);
 }

 static void TestDigest(const TestVector *test) {
   bssl::ScopedEVP_MD_CTX ctx;

   // Test the input provided.
   ASSERT_TRUE(EVP_DigestInit_ex(ctx.get(), test->md.func(), NULL));
   for (size_t i = 0; i < test->repeat; i++) {
     ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), test->input, strlen(test->input)));
   }
   std::unique_ptr<uint8_t[]> digest(new uint8_t[EVP_MD_size(test->md.func())]);
   unsigned digest_len;
   ASSERT_TRUE(EVP_DigestFinal_ex(ctx.get(), digest.get(), &digest_len));
   CompareDigest(test, digest.get(), digest_len);

   // Test the input one character at a time.
   ASSERT_TRUE(EVP_DigestInit_ex(ctx.get(), test->md.func(), NULL));
   ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), NULL, 0));
   for (size_t i = 0; i < test->repeat; i++) {
     for (const char *p = test->input; *p; p++) {
       ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), p, 1));
     }
   }
   ASSERT_TRUE(EVP_DigestFinal_ex(ctx.get(), digest.get(), &digest_len));
   EXPECT_EQ(EVP_MD_size(test->md.func()), digest_len);
   CompareDigest(test, digest.get(), digest_len);

   // Test the one-shot function.
   if (test->md.one_shot_func && test->repeat == 1) {
     uint8_t *out = test->md.one_shot_func((const uint8_t *)test->input,
                                           strlen(test->input), digest.get());
     // One-shot functions return their supplied buffers.
     EXPECT_EQ(digest.get(), out);
     CompareDigest(test, digest.get(), EVP_MD_size(test->md.func()));
   }
 }

 TEST(DigestTest, TestVectors) {
   for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kTestVectors); i++) {
     SCOPED_TRACE(i);
     TestDigest(&kTestVectors[i]);
   }
 }

 TEST(DigestTest, Getters) {
   EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("RSA-SHA512"));
   EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("sha512WithRSAEncryption"));
   EXPECT_EQ(nullptr, EVP_get_digestbyname("nonsense"));
   EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("SHA512"));
   EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("sha512"));

   EXPECT_EQ(EVP_sha512(), EVP_get_digestbynid(NID_sha512));
   EXPECT_EQ(nullptr, EVP_get_digestbynid(NID_sha512WithRSAEncryption));
   EXPECT_EQ(nullptr, EVP_get_digestbynid(NID_undef));

   bssl::UniquePtr<ASN1_OBJECT> obj(OBJ_txt2obj("1.3.14.3.2.26", 0));
   ASSERT_TRUE(obj);
   EXPECT_EQ(EVP_sha1(), EVP_get_digestbyobj(obj.get()));
   EXPECT_EQ(EVP_md5_sha1(), EVP_get_digestbyobj(OBJ_nid2obj(NID_md5_sha1)));
   EXPECT_EQ(EVP_sha1(), EVP_get_digestbyobj(OBJ_nid2obj(NID_sha1)));
 }

 TEST(DigestTest, ASN1) {
   bssl::ScopedCBB cbb;
   ASSERT_TRUE(CBB_init(cbb.get(), 0));
   EXPECT_FALSE(EVP_marshal_digest_algorithm(cbb.get(), EVP_md5_sha1()));

   static const uint8_t kSHA256[] = {0x30, 0x0d, 0x06, 0x09, 0x60,
                                     0x86, 0x48, 0x01, 0x65, 0x03,
                                     0x04, 0x02, 0x01, 0x05, 0x00};
   static const uint8_t kSHA256NoParam[] = {0x30, 0x0b, 0x06, 0x09, 0x60,
                                            0x86, 0x48, 0x01, 0x65, 0x03,
                                            0x04, 0x02, 0x01};
   static const uint8_t kSHA256GarbageParam[] = {
       0x30, 0x0e, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
       0x65, 0x03, 0x04, 0x02, 0x01, 0x02, 0x01, 0x2a};

   // Serialize SHA-256.
   cbb.Reset();
   ASSERT_TRUE(CBB_init(cbb.get(), 0));
   ASSERT_TRUE(EVP_marshal_digest_algorithm(cbb.get(), EVP_sha256()));
   uint8_t *der;
   size_t der_len;
   ASSERT_TRUE(CBB_finish(cbb.get(), &der, &der_len));
   bssl::UniquePtr<uint8_t> free_der(der);
   EXPECT_EQ(Bytes(kSHA256), Bytes(der, der_len));

   // Parse SHA-256.
   CBS cbs;
   CBS_init(&cbs, kSHA256, sizeof(kSHA256));
   EXPECT_EQ(EVP_sha256(), EVP_parse_digest_algorithm(&cbs));
   EXPECT_EQ(0u, CBS_len(&cbs));

   // Missing parameters are tolerated for compatibility.
   CBS_init(&cbs, kSHA256NoParam, sizeof(kSHA256NoParam));
   EXPECT_EQ(EVP_sha256(), EVP_parse_digest_algorithm(&cbs));
   EXPECT_EQ(0u, CBS_len(&cbs));

   // Garbage parameters are not.
   CBS_init(&cbs, kSHA256GarbageParam, sizeof(kSHA256GarbageParam));
   EXPECT_FALSE(EVP_parse_digest_algorithm(&cbs));
 }

 TEST(DigestTest, TransformBlocks) {
   uint8_t blocks[SHA256_CBLOCK * 10];
   for (size_t i = 0; i < sizeof(blocks); i++) {
     blocks[i] = i*3;
   }

   SHA256_CTX ctx1;
   SHA256_Init(&ctx1);
   SHA256_Update(&ctx1, blocks, sizeof(blocks));

   SHA256_CTX ctx2;
   SHA256_Init(&ctx2);
   SHA256_TransformBlocks(ctx2.h, blocks, sizeof(blocks) / SHA256_CBLOCK);

   EXPECT_TRUE(0 == OPENSSL_memcmp(ctx1.h, ctx2.h, sizeof(ctx1.h)));
 }
	/* Copyright (c) 2014, Google Inc.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

	#include <stdint.h>
	#include <stdio.h>
	#include <string.h>

	#include <memory>

	#include <gtest/gtest.h>

	#include <openssl/asn1.h>
	#include <openssl/bytestring.h>
	#include <openssl/crypto.h>
	#include <openssl/digest.h>
	#include <openssl/err.h>
	#include <openssl/md4.h>
	#include <openssl/md5.h>
	#include <openssl/nid.h>
	#include <openssl/obj.h>
	#include <openssl/sha.h>

	#include "../internal.h"
	#include "../test/test_util.h"


	struct MD {
	// name is the name of the digest.
	const char* name;
	// md_func is the digest to test.
	const EVP_MD (func)(void);
	// one_shot_func is the convenience one-shot version of the
	// digest.
	uint8_t (one_shot_func)(const uint8_t , size_t, uint8_t );
	};

	static const MD md4 = { "MD4", &EVP_md4, nullptr };
	static const MD md5 = { "MD5", &EVP_md5, &MD5 };
	static const MD sha1 = { "SHA1", &EVP_sha1, &SHA1 };
	static const MD sha224 = { "SHA224", &EVP_sha224, &SHA224 };
	static const MD sha256 = { "SHA256", &EVP_sha256, &SHA256 };
	static const MD sha384 = { "SHA384", &EVP_sha384, &SHA384 };
	static const MD sha512 = { "SHA512", &EVP_sha512, &SHA512 };
	static const MD md5_sha1 = { "MD5-SHA1", &EVP_md5_sha1, nullptr };

	struct TestVector {
	// md is the digest to test.
	const MD &md;
	// input is a NUL-terminated string to hash.
	const char *input;
	// repeat is the number of times to repeat input.
	size_t repeat;
	// expected_hex is the expected digest in hexadecimal.
	const char *expected_hex;
	};

	static const TestVector kTestVectors[] = {
	// MD4 tests, from RFC 1320. (crypto/md4 does not provide a
	// one-shot MD4 function.)
	{ md4, "", 1, "31d6cfe0d16ae931b73c59d7e0c089c0" },
	{ md4, "a", 1, "bde52cb31de33e46245e05fbdbd6fb24" },
	{ md4, "abc", 1, "a448017aaf21d8525fc10ae87aa6729d" },
	{ md4, "message digest", 1, "d9130a8164549fe818874806e1c7014b" },
	{ md4, "abcdefghijklmnopqrstuvwxyz", 1,
	"d79e1c308aa5bbcdeea8ed63df412da9" },
	{ md4,
	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 1,
	"043f8582f241db351ce627e153e7f0e4" },
	{ md4, "1234567890", 8, "e33b4ddc9c38f2199c3e7b164fcc0536" },

	// MD5 tests, from RFC 1321.
	{ md5, "", 1, "d41d8cd98f00b204e9800998ecf8427e" },
	{ md5, "a", 1, "0cc175b9c0f1b6a831c399e269772661" },
	{ md5, "abc", 1, "900150983cd24fb0d6963f7d28e17f72" },
	{ md5, "message digest", 1, "f96b697d7cb7938d525a2f31aaf161d0" },
	{ md5, "abcdefghijklmnopqrstuvwxyz", 1,
	"c3fcd3d76192e4007dfb496cca67e13b" },
	{ md5,
	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 1,
	"d174ab98d277d9f5a5611c2c9f419d9f" },
	{ md5, "1234567890", 8, "57edf4a22be3c955ac49da2e2107b67a" },

	// SHA-1 tests, from RFC 3174.
	{ sha1, "abc", 1, "a9993e364706816aba3e25717850c26c9cd0d89d" },
	{ sha1,
	"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
	"84983e441c3bd26ebaae4aa1f95129e5e54670f1" },
	{ sha1, "a", 1000000, "34aa973cd4c4daa4f61eeb2bdbad27316534016f" },
	{ sha1,
	"0123456701234567012345670123456701234567012345670123456701234567", 10,
	"dea356a2cddd90c7a7ecedc5ebb563934f460452" },

	// SHA-224 tests, from RFC 3874.
	{ sha224, "abc", 1,
	"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7" },
	{ sha224,
	"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
	"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525" },
	{ sha224,
	"a", 1000000,
	"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67" },

	// SHA-256 tests, from NIST.
	{ sha256, "abc", 1,
	"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad" },
	{ sha256,
	"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 1,
	"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1" },

	// SHA-384 tests, from NIST.
	{ sha384, "abc", 1,
	"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"
	"8086072ba1e7cc2358baeca134c825a7" },
	{ sha384,
	"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
	"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", 1,
	"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"
	"fcc7c71a557e2db966c3e9fa91746039" },

	// SHA-512 tests, from NIST.
	{ sha512, "abc", 1,
	"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"
	"2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f" },
	{ sha512,
	"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
	"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", 1,
	"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"
	"501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909" },

	// MD5-SHA1 tests.
	{ md5_sha1, "abc", 1,
	"900150983cd24fb0d6963f7d28e17f72a9993e364706816aba3e25717850c26c9cd0d89d" },
	};

	static void CompareDigest(const TestVector *test,
	const uint8_t *digest,
	size_t digest_len) {
	static const char kHexTable[] = "0123456789abcdef";
	char digest_hex[2*EVP_MAX_MD_SIZE + 1];

	for (size_t i = 0; i < digest_len; i++) {
	digest_hex[2*i] = kHexTable[digest[i] >> 4];
	digest_hex[2*i + 1] = kHexTable[digest[i] & 0xf];
	}
	digest_hex[2*digest_len] = '\0';

	EXPECT_STREQ(test->expected_hex, digest_hex);
	}

	static void TestDigest(const TestVector *test) {
	bssl::ScopedEVP_MD_CTX ctx;

	// Test the input provided.
	ASSERT_TRUE(EVP_DigestInit_ex(ctx.get(), test->md.func(), NULL));
	for (size_t i = 0; i < test->repeat; i++) {
	ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), test->input, strlen(test->input)));
	}
	std::unique_ptr<uint8_t[]> digest(new uint8_t[EVP_MD_size(test->md.func())]);
	unsigned digest_len;
	ASSERT_TRUE(EVP_DigestFinal_ex(ctx.get(), digest.get(), &digest_len));
	CompareDigest(test, digest.get(), digest_len);

	// Test the input one character at a time.
	ASSERT_TRUE(EVP_DigestInit_ex(ctx.get(), test->md.func(), NULL));
	ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), NULL, 0));
	for (size_t i = 0; i < test->repeat; i++) {
	for (const char p = test->input; p; p++) {
	ASSERT_TRUE(EVP_DigestUpdate(ctx.get(), p, 1));
	}
	}
	ASSERT_TRUE(EVP_DigestFinal_ex(ctx.get(), digest.get(), &digest_len));
	EXPECT_EQ(EVP_MD_size(test->md.func()), digest_len);
	CompareDigest(test, digest.get(), digest_len);

	// Test the one-shot function.
	if (test->md.one_shot_func && test->repeat == 1) {
	uint8_t out = test->md.one_shot_func((const uint8_t )test->input,
	strlen(test->input), digest.get());
	// One-shot functions return their supplied buffers.
	EXPECT_EQ(digest.get(), out);
	CompareDigest(test, digest.get(), EVP_MD_size(test->md.func()));
	}
	}

	TEST(DigestTest, TestVectors) {
	for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kTestVectors); i++) {
	SCOPED_TRACE(i);
	TestDigest(&kTestVectors[i]);
	}
	}

	TEST(DigestTest, Getters) {
	EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("RSA-SHA512"));
	EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("sha512WithRSAEncryption"));
	EXPECT_EQ(nullptr, EVP_get_digestbyname("nonsense"));
	EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("SHA512"));
	EXPECT_EQ(EVP_sha512(), EVP_get_digestbyname("sha512"));

	EXPECT_EQ(EVP_sha512(), EVP_get_digestbynid(NID_sha512));
	EXPECT_EQ(nullptr, EVP_get_digestbynid(NID_sha512WithRSAEncryption));
	EXPECT_EQ(nullptr, EVP_get_digestbynid(NID_undef));

	bssl::UniquePtr<ASN1_OBJECT> obj(OBJ_txt2obj("1.3.14.3.2.26", 0));
	ASSERT_TRUE(obj);
	EXPECT_EQ(EVP_sha1(), EVP_get_digestbyobj(obj.get()));
	EXPECT_EQ(EVP_md5_sha1(), EVP_get_digestbyobj(OBJ_nid2obj(NID_md5_sha1)));
	EXPECT_EQ(EVP_sha1(), EVP_get_digestbyobj(OBJ_nid2obj(NID_sha1)));
	}

	TEST(DigestTest, ASN1) {
	bssl::ScopedCBB cbb;
	ASSERT_TRUE(CBB_init(cbb.get(), 0));
	EXPECT_FALSE(EVP_marshal_digest_algorithm(cbb.get(), EVP_md5_sha1()));

	static const uint8_t kSHA256[] = {0x30, 0x0d, 0x06, 0x09, 0x60,
	0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x01, 0x05, 0x00};
	static const uint8_t kSHA256NoParam[] = {0x30, 0x0b, 0x06, 0x09, 0x60,
	0x86, 0x48, 0x01, 0x65, 0x03,
	0x04, 0x02, 0x01};
	static const uint8_t kSHA256GarbageParam[] = {
	0x30, 0x0e, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
	0x65, 0x03, 0x04, 0x02, 0x01, 0x02, 0x01, 0x2a};

	// Serialize SHA-256.
	cbb.Reset();
	ASSERT_TRUE(CBB_init(cbb.get(), 0));
	ASSERT_TRUE(EVP_marshal_digest_algorithm(cbb.get(), EVP_sha256()));
	uint8_t *der;
	size_t der_len;
	ASSERT_TRUE(CBB_finish(cbb.get(), &der, &der_len));
	bssl::UniquePtr<uint8_t> free_der(der);
	EXPECT_EQ(Bytes(kSHA256), Bytes(der, der_len));

	// Parse SHA-256.
	CBS cbs;
	CBS_init(&cbs, kSHA256, sizeof(kSHA256));
	EXPECT_EQ(EVP_sha256(), EVP_parse_digest_algorithm(&cbs));
	EXPECT_EQ(0u, CBS_len(&cbs));

	// Missing parameters are tolerated for compatibility.
	CBS_init(&cbs, kSHA256NoParam, sizeof(kSHA256NoParam));
	EXPECT_EQ(EVP_sha256(), EVP_parse_digest_algorithm(&cbs));
	EXPECT_EQ(0u, CBS_len(&cbs));

	// Garbage parameters are not.
	CBS_init(&cbs, kSHA256GarbageParam, sizeof(kSHA256GarbageParam));
	EXPECT_FALSE(EVP_parse_digest_algorithm(&cbs));
	}

	TEST(DigestTest, TransformBlocks) {
	uint8_t blocks[SHA256_CBLOCK * 10];
	for (size_t i = 0; i < sizeof(blocks); i++) {
	blocks[i] = i*3;
	}

	SHA256_CTX ctx1;
	SHA256_Init(&ctx1);
	SHA256_Update(&ctx1, blocks, sizeof(blocks));

	SHA256_CTX ctx2;
	SHA256_Init(&ctx2);
	SHA256_TransformBlocks(ctx2.h, blocks, sizeof(blocks) / SHA256_CBLOCK);

	EXPECT_TRUE(0 == OPENSSL_memcmp(ctx1.h, ctx2.h, sizeof(ctx1.h)));
	}