| /* |
| * Copyright 2023-2024 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <openssl/evp.h> |
| #include <openssl/rand.h> |
| #include <openssl/core_names.h> |
| #include "testutil.h" |
| #include "internal/nelem.h" |
| |
| static const unsigned char shake256_input[] = { |
| 0x8d, 0x80, 0x01, 0xe2, 0xc0, 0x96, 0xf1, 0xb8, |
| 0x8e, 0x7c, 0x92, 0x24, 0xa0, 0x86, 0xef, 0xd4, |
| 0x79, 0x7f, 0xbf, 0x74, 0xa8, 0x03, 0x3a, 0x2d, |
| 0x42, 0x2a, 0x2b, 0x6b, 0x8f, 0x67, 0x47, 0xe4 |
| }; |
| |
| /* |
| * This KAT output is 250 bytes, which is more than |
| * the SHAKE256 block size (136 bytes). |
| */ |
| static const unsigned char shake256_output[] = { |
| 0x2e, 0x97, 0x5f, 0x6a, 0x8a, 0x14, 0xf0, 0x70, |
| 0x4d, 0x51, 0xb1, 0x36, 0x67, 0xd8, 0x19, 0x5c, |
| 0x21, 0x9f, 0x71, 0xe6, 0x34, 0x56, 0x96, 0xc4, |
| 0x9f, 0xa4, 0xb9, 0xd0, 0x8e, 0x92, 0x25, 0xd3, |
| 0xd3, 0x93, 0x93, 0x42, 0x51, 0x52, 0xc9, 0x7e, |
| 0x71, 0xdd, 0x24, 0x60, 0x1c, 0x11, 0xab, 0xcf, |
| 0xa0, 0xf1, 0x2f, 0x53, 0xc6, 0x80, 0xbd, 0x3a, |
| 0xe7, 0x57, 0xb8, 0x13, 0x4a, 0x9c, 0x10, 0xd4, |
| 0x29, 0x61, 0x58, 0x69, 0x21, 0x7f, 0xdd, 0x58, |
| 0x85, 0xc4, 0xdb, 0x17, 0x49, 0x85, 0x70, 0x3a, |
| 0x6d, 0x6d, 0xe9, 0x4a, 0x66, 0x7e, 0xac, 0x30, |
| 0x23, 0x44, 0x3a, 0x83, 0x37, 0xae, 0x1b, 0xc6, |
| 0x01, 0xb7, 0x6d, 0x7d, 0x38, 0xec, 0x3c, 0x34, |
| 0x46, 0x31, 0x05, 0xf0, 0xd3, 0x94, 0x9d, 0x78, |
| 0xe5, 0x62, 0xa0, 0x39, 0xe4, 0x46, 0x95, 0x48, |
| 0xb6, 0x09, 0x39, 0x5d, 0xe5, 0xa4, 0xfd, 0x43, |
| 0xc4, 0x6c, 0xa9, 0xfd, 0x6e, 0xe2, 0x9a, 0xda, |
| 0x5e, 0xfc, 0x07, 0xd8, 0x4d, 0x55, 0x32, 0x49, |
| 0x45, 0x0d, 0xab, 0x4a, 0x49, 0xc4, 0x83, 0xde, |
| 0xd2, 0x50, 0xc9, 0x33, 0x8f, 0x85, 0xcd, 0x93, |
| 0x7a, 0xe6, 0x6b, 0xb4, 0x36, 0xf3, 0xb4, 0x02, |
| 0x6e, 0x85, 0x9f, 0xda, 0x1c, 0xa5, 0x71, 0x43, |
| 0x2f, 0x3b, 0xfc, 0x09, 0xe7, 0xc0, 0x3c, 0xa4, |
| 0xd1, 0x83, 0xb7, 0x41, 0x11, 0x1c, 0xa0, 0x48, |
| 0x3d, 0x0e, 0xda, 0xbc, 0x03, 0xfe, 0xb2, 0x3b, |
| 0x17, 0xee, 0x48, 0xe8, 0x44, 0xba, 0x24, 0x08, |
| 0xd9, 0xdc, 0xfd, 0x01, 0x39, 0xd2, 0xe8, 0xc7, |
| 0x31, 0x01, 0x25, 0xae, 0xe8, 0x01, 0xc6, 0x1a, |
| 0xb7, 0x90, 0x0d, 0x1e, 0xfc, 0x47, 0xc0, 0x78, |
| 0x28, 0x17, 0x66, 0xf3, 0x61, 0xc5, 0xe6, 0x11, |
| 0x13, 0x46, 0x23, 0x5e, 0x1d, 0xc3, 0x83, 0x25, |
| 0x66, 0x6c |
| }; |
| |
| static const unsigned char shake256_largemsg_input[] = { |
| 0xb2, 0xd2, 0x38, 0x65, 0xaf, 0x8f, 0x25, 0x6e, |
| 0x64, 0x40, 0xe2, 0x0d, 0x49, 0x8e, 0x3e, 0x64, |
| 0x46, 0xd2, 0x03, 0xa4, 0x19, 0xe3, 0x7b, 0x80, |
| 0xf7, 0x2b, 0x32, 0xe2, 0x76, 0x01, 0xfe, 0xdd, |
| 0xaa, 0x33, 0x3d, 0xe4, 0x8e, 0xe1, 0x5e, 0x39, |
| 0xa6, 0x92, 0xa3, 0xa7, 0xe3, 0x81, 0x24, 0x74, |
| 0xc7, 0x38, 0x18, 0x92, 0xc9, 0x60, 0x50, 0x15, |
| 0xfb, 0xd8, 0x04, 0xea, 0xea, 0x04, 0xd2, 0xc5, |
| 0xc6, 0x68, 0x04, 0x5b, 0xc3, 0x75, 0x12, 0xd2, |
| 0xbe, 0xa2, 0x67, 0x75, 0x24, 0xbf, 0x68, 0xad, |
| 0x10, 0x86, 0xb3, 0x2c, 0xb3, 0x74, 0xa4, 0x6c, |
| 0xf9, 0xd7, 0x1e, 0x58, 0x69, 0x27, 0x88, 0x49, |
| 0x4e, 0x99, 0x15, 0x33, 0x14, 0xf2, 0x49, 0x21, |
| 0xf4, 0x99, 0xb9, 0xde, 0xd4, 0xf1, 0x12, 0xf5, |
| 0x68, 0xe5, 0x5c, 0xdc, 0x9e, 0xc5, 0x80, 0x6d, |
| 0x39, 0x50, 0x08, 0x95, 0xbb, 0x12, 0x27, 0x50, |
| 0x89, 0xf0, 0xf9, 0xd5, 0x4a, 0x01, 0x0b, 0x0d, |
| 0x90, 0x9f, 0x1e, 0x4a, 0xba, 0xbe, 0x28, 0x36, |
| 0x19, 0x7d, 0x9c, 0x0a, 0x51, 0xfb, 0xeb, 0x00, |
| 0x02, 0x6c, 0x4b, 0x0a, 0xa8, 0x6c, 0xb7, 0xc4, |
| 0xc0, 0x92, 0x37, 0xa7, 0x2d, 0x49, 0x61, 0x80, |
| 0xd9, 0xdb, 0x20, 0x21, 0x9f, 0xcf, 0xb4, 0x57, |
| 0x69, 0x75, 0xfa, 0x1c, 0x95, 0xbf, 0xee, 0x0d, |
| 0x9e, 0x52, 0x6e, 0x1e, 0xf8, 0xdd, 0x41, 0x8c, |
| 0x3b, 0xaa, 0x57, 0x13, 0x84, 0x73, 0x52, 0x62, |
| 0x18, 0x76, 0x46, 0xcc, 0x4b, 0xcb, 0xbd, 0x40, |
| 0xa1, 0xf6, 0xff, 0x7b, 0x32, 0xb9, 0x90, 0x7c, |
| 0x53, 0x2c, 0xf9, 0x38, 0x72, 0x0f, 0xcb, 0x90, |
| 0x42, 0x5e, 0xe2, 0x80, 0x19, 0x26, 0xe7, 0x99, |
| 0x96, 0x98, 0x18, 0xb1, 0x86, 0x5b, 0x4c, 0xd9, |
| 0x08, 0x27, 0x31, 0x8f, 0xf0, 0x90, 0xd9, 0x35, |
| 0x6a, 0x1f, 0x75, 0xc2, 0xe0, 0xa7, 0x60, 0xb8, |
| 0x1d, 0xd6, 0x5f, 0x56, 0xb2, 0x0b, 0x27, 0x0e, |
| 0x98, 0x67, 0x1f, 0x39, 0x18, 0x27, 0x68, 0x0a, |
| 0xe8, 0x31, 0x1b, 0xc0, 0x97, 0xec, 0xd1, 0x20, |
| 0x2a, 0x55, 0x69, 0x23, 0x08, 0x50, 0x05, 0xec, |
| 0x13, 0x3b, 0x56, 0xfc, 0x18, 0xc9, 0x1a, 0xa9, |
| 0x69, 0x0e, 0xe2, 0xcc, 0xc8, 0xd6, 0x19, 0xbb, |
| 0x87, 0x3b, 0x42, 0x77, 0xee, 0x77, 0x81, 0x26, |
| 0xdd, 0xf6, 0x5d, 0xc3, 0xb2, 0xb0, 0xc4, 0x14, |
| 0x6d, 0xb5, 0x4f, 0xdc, 0x13, 0x09, 0xc8, 0x53, |
| 0x50, 0xb3, 0xea, 0xd3, 0x5f, 0x11, 0x67, 0xd4, |
| 0x2f, 0x6e, 0x30, 0x1a, 0xbe, 0xd6, 0xf0, 0x2d, |
| 0xc9, 0x29, 0xd9, 0x0a, 0xa8, 0x6f, 0xa4, 0x18, |
| 0x74, 0x6b, 0xd3, 0x5d, 0x6a, 0x73, 0x3a, 0xf2, |
| 0x94, 0x7f, 0xbd, 0xb4, 0xa6, 0x7f, 0x5b, 0x3d, |
| 0x26, 0xf2, 0x6c, 0x13, 0xcf, 0xb4, 0x26, 0x1e, |
| 0x38, 0x17, 0x66, 0x60, 0xb1, 0x36, 0xae, 0xe0, |
| 0x6d, 0x86, 0x69, 0xe7, 0xe7, 0xae, 0x77, 0x6f, |
| 0x7e, 0x99, 0xe5, 0xd9, 0x62, 0xc9, 0xfc, 0xde, |
| 0xb4, 0xee, 0x7e, 0xc8, 0xe9, 0xb7, 0x2c, 0xe2, |
| 0x70, 0xe8, 0x8b, 0x2d, 0x94, 0xad, 0xe8, 0x54, |
| 0xa3, 0x2d, 0x9a, 0xe2, 0x50, 0x63, 0x87, 0xb3, |
| 0x56, 0x29, 0xea, 0xa8, 0x5e, 0x96, 0x53, 0x9f, |
| 0x23, 0x8a, 0xef, 0xa3, 0xd4, 0x87, 0x09, 0x5f, |
| 0xba, 0xc3, 0xd1, 0xd9, 0x1a, 0x7b, 0x5c, 0x5d, |
| 0x5d, 0x89, 0xed, 0xb6, 0x6e, 0x39, 0x73, 0xa5, |
| 0x64, 0x59, 0x52, 0x8b, 0x61, 0x8f, 0x66, 0x69, |
| 0xb9, 0xf0, 0x45, 0x0a, 0x57, 0xcd, 0xc5, 0x7f, |
| 0x5d, 0xd0, 0xbf, 0xcc, 0x0b, 0x48, 0x12, 0xe1, |
| 0xe2, 0xc2, 0xea, 0xcc, 0x09, 0xd9, 0x42, 0x2c, |
| 0xef, 0x4f, 0xa7, 0xe9, 0x32, 0x5c, 0x3f, 0x22, |
| 0xc0, 0x45, 0x0b, 0x67, 0x3c, 0x31, 0x69, 0x29, |
| 0xa3, 0x39, 0xdd, 0x6e, 0x2f, 0xbe, 0x10, 0xc9, |
| 0x7b, 0xff, 0x19, 0x8a, 0xe9, 0xea, 0xfc, 0x32, |
| 0x41, 0x33, 0x70, 0x2a, 0x9a, 0xa4, 0xe6, 0xb4, |
| 0x7e, 0xb4, 0xc6, 0x21, 0x49, 0x5a, 0xfc, 0x45, |
| 0xd2, 0x23, 0xb3, 0x28, 0x4d, 0x83, 0x60, 0xfe, |
| 0x70, 0x68, 0x03, 0x59, 0xd5, 0x15, 0xaa, 0x9e, |
| 0xa0, 0x2e, 0x36, 0xb5, 0x61, 0x0f, 0x61, 0x05, |
| 0x3c, 0x62, 0x00, 0xa0, 0x47, 0xf1, 0x86, 0xba, |
| 0x33, 0xb8, 0xca, 0x60, 0x2f, 0x3f, 0x0a, 0x67, |
| 0x09, 0x27, 0x2f, 0xa2, 0x96, 0x02, 0x52, 0x58, |
| 0x55, 0x68, 0x80, 0xf4, 0x4f, 0x47, 0xba, 0xff, |
| 0x41, 0x7a, 0x40, 0x4c, 0xfd, 0x9d, 0x10, 0x72, |
| 0x0e, 0x20, 0xa9, 0x7f, 0x9b, 0x9b, 0x14, 0xeb, |
| 0x8e, 0x61, 0x25, 0xcb, 0xf4, 0x58, 0xff, 0x47, |
| 0xa7, 0x08, 0xd6, 0x4e, 0x2b, 0xf1, 0xf9, 0x89, |
| 0xd7, 0x22, 0x0f, 0x8d, 0x35, 0x07, 0xa0, 0x54, |
| 0xab, 0x83, 0xd8, 0xee, 0x5a, 0x3e, 0x88, 0x74, |
| 0x46, 0x41, 0x6e, 0x3e, 0xb7, 0xc0, 0xb6, 0x55, |
| 0xe0, 0x36, 0xc0, 0x2b, 0xbf, 0xb8, 0x24, 0x8a, |
| 0x44, 0x82, 0xf4, 0xcb, 0xb5, 0xd7, 0x41, 0x48, |
| 0x51, 0x08, 0xe0, 0x14, 0x34, 0xd2, 0x6d, 0xe9, |
| 0x7a, 0xec, 0x91, 0x61, 0xa7, 0xe1, 0x81, 0x69, |
| 0x47, 0x1c, 0xc7, 0xf3 |
| }; |
| |
| static const unsigned char shake256_largemsg_output[] = { |
| 0x64, 0xea, 0x24, 0x6a, 0xab, 0x80, 0x37, 0x9e, |
| 0x08, 0xe2, 0x19, 0x9e, 0x09, 0x69, 0xe2, 0xee, |
| 0x1a, 0x5d, 0xd1, 0x68, 0x68, 0xec, 0x8d, 0x42, |
| 0xd0, 0xf8, 0xb8, 0x44, 0x74, 0x54, 0x87, 0x3e, |
| }; |
| |
| static EVP_MD_CTX *shake_setup(const char *name) |
| { |
| EVP_MD_CTX *ctx = NULL; |
| EVP_MD *md = NULL; |
| |
| if (!TEST_ptr(md = EVP_MD_fetch(NULL, name, NULL))) |
| return NULL; |
| |
| if (!TEST_ptr(ctx = EVP_MD_CTX_new())) |
| goto err; |
| if (!TEST_true(EVP_DigestInit_ex2(ctx, md, NULL))) |
| goto err; |
| EVP_MD_free(md); |
| return ctx; |
| err: |
| EVP_MD_free(md); |
| EVP_MD_CTX_free(ctx); |
| return NULL; |
| } |
| |
| static int shake_kat_test(void) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char out[sizeof(shake256_output)]; |
| |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| if (!TEST_true(EVP_DigestUpdate(ctx, shake256_input, |
| sizeof(shake256_input))) |
| || !TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out))) |
| || !TEST_mem_eq(out, sizeof(out), |
| shake256_output,sizeof(shake256_output)) |
| /* Test that a second call to EVP_DigestFinalXOF fails */ |
| || !TEST_false(EVP_DigestFinalXOF(ctx, out, sizeof(out))) |
| /* Test that a call to EVP_DigestSqueeze fails */ |
| || !TEST_false(EVP_DigestSqueeze(ctx, out, sizeof(out)))) |
| goto err; |
| ret = 1; |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| static int shake_kat_digestfinal_test(void) |
| { |
| int ret = 0; |
| unsigned int digest_length = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char out[sizeof(shake256_output)]; |
| |
| /* Test that EVP_DigestFinal without setting XOFLEN fails */ |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| if (!TEST_true(EVP_DigestUpdate(ctx, shake256_input, |
| sizeof(shake256_input)))) |
| return 0; |
| ERR_set_mark(); |
| if (!TEST_false(EVP_DigestFinal(ctx, out, &digest_length))) { |
| ERR_clear_last_mark(); |
| return 0; |
| } |
| ERR_pop_to_mark(); |
| EVP_MD_CTX_free(ctx); |
| |
| /* However EVP_DigestFinalXOF must work */ |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| if (!TEST_true(EVP_DigestUpdate(ctx, shake256_input, |
| sizeof(shake256_input)))) |
| return 0; |
| if (!TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out))) |
| || !TEST_mem_eq(out, sizeof(out), |
| shake256_output, sizeof(shake256_output)) |
| || !TEST_false(EVP_DigestFinalXOF(ctx, out, sizeof(out)))) |
| goto err; |
| ret = 1; |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| /* |
| * Test that EVP_DigestFinal() returns the output length |
| * set by the OSSL_DIGEST_PARAM_XOFLEN param. |
| */ |
| static int shake_kat_digestfinal_xoflen_test(void) |
| { |
| int ret = 0; |
| unsigned int digest_length = 0; |
| EVP_MD_CTX *ctx = NULL; |
| const EVP_MD *md; |
| unsigned char out[sizeof(shake256_output)]; |
| OSSL_PARAM params[2]; |
| size_t sz = 12; |
| |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| md = EVP_MD_CTX_get0_md(ctx); |
| |
| memset(out, 0, sizeof(out)); |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz); |
| params[1] = OSSL_PARAM_construct_end(); |
| |
| if (!TEST_int_eq(EVP_MD_CTX_size(ctx), -1) |
| || !TEST_int_eq(EVP_MD_CTX_set_params(ctx, params), 1) |
| || !TEST_int_eq(EVP_MD_CTX_size(ctx), sz) |
| || !TEST_int_eq(EVP_MD_get_size(md), 0) |
| || !TEST_true(EVP_MD_xof(md)) |
| || !TEST_true(EVP_DigestUpdate(ctx, shake256_input, |
| sizeof(shake256_input))) |
| || !TEST_true(EVP_DigestFinal(ctx, out, &digest_length)) |
| || !TEST_uint_eq(digest_length, (unsigned int)sz) |
| || !TEST_mem_eq(out, digest_length, |
| shake256_output, digest_length) |
| || !TEST_uchar_eq(out[digest_length], 0)) |
| goto err; |
| ret = 1; |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| /* |
| * Test that multiple absorb calls gives the expected result. |
| * This is a nested test that uses multiple strides for the input. |
| */ |
| static int shake_absorb_test(void) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char out[sizeof(shake256_largemsg_output)]; |
| size_t total = sizeof(shake256_largemsg_input); |
| size_t i, stride, sz; |
| |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| |
| for (stride = 1; stride < total; ++stride) { |
| sz = 0; |
| for (i = 0; i < total; i += sz) { |
| sz += stride; |
| if ((i + sz) > total) |
| sz = total - i; |
| if (!TEST_true(EVP_DigestUpdate(ctx, shake256_largemsg_input + i, |
| sz))) |
| goto err; |
| } |
| if (!TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out))) |
| || !TEST_mem_eq(out, sizeof(out), |
| shake256_largemsg_output, |
| sizeof(shake256_largemsg_output))) |
| goto err; |
| if (!TEST_true(EVP_DigestInit_ex2(ctx, NULL, NULL))) |
| goto err; |
| } |
| ret = 1; |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| /* |
| * Table containing the size of the output to squeeze for the |
| * initially call, followed by a size for each subsequent call. |
| */ |
| static const struct { |
| size_t startsz, incsz; |
| } stride_tests[] = { |
| { 1, 1 }, |
| { 1, 136 }, |
| { 1, 136/2 }, |
| { 1, 136/2-1 }, |
| { 1, 136/2+1 }, |
| { 1, 136*3 }, |
| { 8, 8 }, |
| { 9, 9 }, |
| { 10, 10 }, |
| { 136/2 - 1, 136 }, |
| { 136/2 - 1, 136-1 }, |
| { 136/2 - 1, 136+1 }, |
| { 136/2, 136 }, |
| { 136/2, 136-1 }, |
| { 136/2, 136+1 }, |
| { 136/2 + 1, 136 }, |
| { 136/2 + 1, 136-1 }, |
| { 136/2 + 1, 136+1 }, |
| { 136, 2 }, |
| { 136, 136 }, |
| { 136-1, 136 }, |
| { 136-1, 136-1 }, |
| { 136-1, 136+1 }, |
| { 136+1, 136 }, |
| { 136+1, 136-1 }, |
| { 136+1, 136+1 }, |
| { 136*3, 136 }, |
| { 136*3, 136 + 1 }, |
| { 136*3, 136 - 1 }, |
| { 136*3, 136/2 }, |
| { 136*3, 136/2 + 1 }, |
| { 136*3, 136/2 - 1 }, |
| }; |
| |
| /* |
| * Helper to do multiple squeezes of output data using SHAKE256. |
| * tst is an index into the stride_tests[] containing an initial starting |
| * output length, followed by a second output length to use for all remaining |
| * squeezes. expected_outlen contains the total number of bytes to squeeze. |
| * in and inlen represent the input to absorb. expected_out and expected_outlen |
| * represent the expected output. |
| */ |
| static int do_shake_squeeze_test(int tst, |
| const unsigned char *in, size_t inlen, |
| const unsigned char *expected_out, |
| size_t expected_outlen) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char *out = NULL; |
| size_t i = 0, sz = stride_tests[tst].startsz; |
| |
| if (!TEST_ptr(ctx = shake_setup("SHAKE256"))) |
| return 0; |
| if (!TEST_ptr(out = OPENSSL_malloc(expected_outlen))) |
| goto err; |
| if (!TEST_true(EVP_DigestUpdate(ctx, in, inlen))) |
| goto err; |
| |
| while (i < expected_outlen) { |
| if ((i + sz) > expected_outlen) |
| sz = expected_outlen - i; |
| if (!TEST_true(EVP_DigestSqueeze(ctx, out + i, sz))) |
| goto err; |
| i += sz; |
| sz = stride_tests[tst].incsz; |
| } |
| if (!TEST_mem_eq(out, expected_outlen, expected_out, expected_outlen)) |
| goto err; |
| ret = 1; |
| err: |
| OPENSSL_free(out); |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| static int shake_squeeze_kat_test(int tst) |
| { |
| return do_shake_squeeze_test(tst, shake256_input, sizeof(shake256_input), |
| shake256_output, sizeof(shake256_output)); |
| } |
| |
| /* |
| * Generate some random input to absorb, and then |
| * squeeze it out in one operation to get a expected |
| * output. Use this to test that multiple squeeze calls |
| * on the same input gives the same output. |
| */ |
| static int shake_squeeze_large_test(int tst) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char msg[16]; |
| unsigned char out[2000]; |
| |
| if (!TEST_int_gt(RAND_bytes(msg, sizeof(msg)), 0) |
| || !TEST_ptr(ctx = shake_setup("SHAKE256")) |
| || !TEST_true(EVP_DigestUpdate(ctx, msg, sizeof(msg))) |
| || !TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out)))) |
| goto err; |
| |
| ret = do_shake_squeeze_test(tst, msg, sizeof(msg), out, sizeof(out)); |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| static const size_t dupoffset_tests[] = { |
| 1, 135, 136, 137, 136*3-1, 136*3, 136*3+1 |
| }; |
| |
| /* Helper function to test that EVP_MD_CTX_dup() copies the internal state */ |
| static int do_shake_squeeze_dup_test(int tst, const char *alg, |
| const unsigned char *in, size_t inlen, |
| const unsigned char *expected_out, |
| size_t expected_outlen) |
| { |
| int ret = 0; |
| EVP_MD_CTX *cur, *ctx = NULL, *dupctx = NULL; |
| unsigned char *out = NULL; |
| size_t i = 0, sz = 10; |
| size_t dupoffset = dupoffset_tests[tst]; |
| |
| if (!TEST_ptr(ctx = shake_setup(alg))) |
| return 0; |
| cur = ctx; |
| if (!TEST_ptr(out = OPENSSL_malloc(expected_outlen))) |
| goto err; |
| if (!TEST_true(EVP_DigestUpdate(ctx, in, inlen))) |
| goto err; |
| |
| while (i < expected_outlen) { |
| if ((i + sz) > expected_outlen) |
| sz = expected_outlen - i; |
| if (!TEST_true(EVP_DigestSqueeze(cur, out + i, sz))) |
| goto err; |
| i += sz; |
| /* At a certain offset we swap to a new ctx that copies the state */ |
| if (dupctx == NULL && i >= dupoffset) { |
| if (!TEST_ptr(dupctx = EVP_MD_CTX_dup(ctx))) |
| goto err; |
| cur = dupctx; |
| } |
| } |
| if (!TEST_mem_eq(out, expected_outlen, expected_out, expected_outlen)) |
| goto err; |
| ret = 1; |
| err: |
| OPENSSL_free(out); |
| EVP_MD_CTX_free(ctx); |
| EVP_MD_CTX_free(dupctx); |
| return ret; |
| } |
| |
| /* Test that the internal state can be copied */ |
| static int shake_squeeze_dup_test(int tst) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char msg[16]; |
| unsigned char out[1000]; |
| const char *alg = "SHAKE128"; |
| |
| if (!TEST_int_gt(RAND_bytes(msg, sizeof(msg)), 0) |
| || !TEST_ptr(ctx = shake_setup(alg)) |
| || !TEST_true(EVP_DigestUpdate(ctx, msg, sizeof(msg))) |
| || !TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out)))) |
| goto err; |
| |
| ret = do_shake_squeeze_dup_test(tst, alg, msg, sizeof(msg), |
| out, sizeof(out)); |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| /* Test that a squeeze without a preceding absorb works */ |
| static int shake_squeeze_no_absorb_test(void) |
| { |
| int ret = 0; |
| EVP_MD_CTX *ctx = NULL; |
| unsigned char out[1000]; |
| unsigned char out2[1000]; |
| const char *alg = "SHAKE128"; |
| |
| if (!TEST_ptr(ctx = shake_setup(alg)) |
| || !TEST_true(EVP_DigestFinalXOF(ctx, out, sizeof(out)))) |
| goto err; |
| |
| if (!TEST_true(EVP_DigestInit_ex2(ctx, NULL, NULL)) |
| || !TEST_true(EVP_DigestSqueeze(ctx, out2, sizeof(out2) / 2)) |
| || !TEST_true(EVP_DigestSqueeze(ctx, out2 + sizeof(out2) / 2, |
| sizeof(out2) / 2))) |
| goto err; |
| |
| if (!TEST_mem_eq(out2, sizeof(out2), out, sizeof(out))) |
| goto err; |
| ret = 1; |
| |
| err: |
| EVP_MD_CTX_free(ctx); |
| return ret; |
| } |
| |
| static int xof_fail_test(void) |
| { |
| int ret; |
| EVP_MD *md = NULL; |
| |
| ret = TEST_ptr(md = EVP_MD_fetch(NULL, "SHA256", NULL)) |
| && TEST_false(EVP_MD_xof(md)); |
| EVP_MD_free(md); |
| return ret; |
| } |
| |
| int setup_tests(void) |
| { |
| ADD_TEST(shake_kat_test); |
| ADD_TEST(shake_kat_digestfinal_test); |
| ADD_TEST(shake_kat_digestfinal_xoflen_test); |
| ADD_TEST(shake_absorb_test); |
| ADD_ALL_TESTS(shake_squeeze_kat_test, OSSL_NELEM(stride_tests)); |
| ADD_ALL_TESTS(shake_squeeze_large_test, OSSL_NELEM(stride_tests)); |
| ADD_ALL_TESTS(shake_squeeze_dup_test, OSSL_NELEM(dupoffset_tests)); |
| ADD_TEST(xof_fail_test); |
| ADD_TEST(shake_squeeze_no_absorb_test); |
| return 1; |
| } |
