// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/policy/test_support/signature_provider.h"

#include <stdint.h>

#include <cstdint>

#include "base/base64.h"
#include "base/check.h"
#include "base/containers/span.h"
#include "base/hash/sha1.h"
#include "base/strings/string_view_util.h"
#include "components/policy/core/common/cloud/test/policy_builder.h"
#include "components/policy/proto/device_management_backend.pb.h"
#include "crypto/keypair.h"
#include "crypto/sign.h"
#include "device_management_backend.pb.h"

namespace em = enterprise_management;

namespace policy {

namespace {

// To test signature verification with fake_dmserver, add the public key's
// base64 to your Chromium command line:
// --policy-verification-key="MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsmjHzdHVrOG5/Je9lF7vG/YN6kfIsI+ishej1T8dQAwmpvPEuca+jHnhkibZri3bP7ti2hsocB1gZblwIQ5XrShSF3TyjYaGR63VjP6zcYGfdGtmTDKNtEVa4QbCRcGlzW0tskNj2Kq5G6VTm+d1wA18yNxUS962e26P/Pw5vQYy/G9Hq2irZphQ4JT7fBUD8qXWYadwV0mPJnUwmaPXo9C4Jtnrf//GoGILxTjWNMWvs5MJrzf8mIDy8ltdzqUOx0QxhyQA983d4cj+3kZok+k8H62KpvVfHwxqoRw54bVxo08vYkjNUmVYe4RAMRROAVhOiZs6BD4PnWbwl2bNjwIDAQAB"
//
// and comment out CHECK_IS_TEST() in cloud_policy_validator.cc
constexpr auto kVerificationPrivateKey = std::to_array<uint8_t>(
    {0x30, 0x82, 0x04, 0xbe, 0x02, 0x01, 0x00, 0x30, 0x0d, 0x06, 0x09, 0x2a,
     0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x04, 0x82,
     0x04, 0xa8, 0x30, 0x82, 0x04, 0xa4, 0x02, 0x01, 0x00, 0x02, 0x82, 0x01,
     0x01, 0x00, 0xb2, 0x68, 0xc7, 0xcd, 0xd1, 0xd5, 0xac, 0xe1, 0xb9, 0xfc,
     0x97, 0xbd, 0x94, 0x5e, 0xef, 0x1b, 0xf6, 0x0d, 0xea, 0x47, 0xc8, 0xb0,
     0x8f, 0xa2, 0xb2, 0x17, 0xa3, 0xd5, 0x3f, 0x1d, 0x40, 0x0c, 0x26, 0xa6,
     0xf3, 0xc4, 0xb9, 0xc6, 0xbe, 0x8c, 0x79, 0xe1, 0x92, 0x26, 0xd9, 0xae,
     0x2d, 0xdb, 0x3f, 0xbb, 0x62, 0xda, 0x1b, 0x28, 0x70, 0x1d, 0x60, 0x65,
     0xb9, 0x70, 0x21, 0x0e, 0x57, 0xad, 0x28, 0x52, 0x17, 0x74, 0xf2, 0x8d,
     0x86, 0x86, 0x47, 0xad, 0xd5, 0x8c, 0xfe, 0xb3, 0x71, 0x81, 0x9f, 0x74,
     0x6b, 0x66, 0x4c, 0x32, 0x8d, 0xb4, 0x45, 0x5a, 0xe1, 0x06, 0xc2, 0x45,
     0xc1, 0xa5, 0xcd, 0x6d, 0x2d, 0xb2, 0x43, 0x63, 0xd8, 0xaa, 0xb9, 0x1b,
     0xa5, 0x53, 0x9b, 0xe7, 0x75, 0xc0, 0x0d, 0x7c, 0xc8, 0xdc, 0x54, 0x4b,
     0xde, 0xb6, 0x7b, 0x6e, 0x8f, 0xfc, 0xfc, 0x39, 0xbd, 0x06, 0x32, 0xfc,
     0x6f, 0x47, 0xab, 0x68, 0xab, 0x66, 0x98, 0x50, 0xe0, 0x94, 0xfb, 0x7c,
     0x15, 0x03, 0xf2, 0xa5, 0xd6, 0x61, 0xa7, 0x70, 0x57, 0x49, 0x8f, 0x26,
     0x75, 0x30, 0x99, 0xa3, 0xd7, 0xa3, 0xd0, 0xb8, 0x26, 0xd9, 0xeb, 0x7f,
     0xff, 0xc6, 0xa0, 0x62, 0x0b, 0xc5, 0x38, 0xd6, 0x34, 0xc5, 0xaf, 0xb3,
     0x93, 0x09, 0xaf, 0x37, 0xfc, 0x98, 0x80, 0xf2, 0xf2, 0x5b, 0x5d, 0xce,
     0xa5, 0x0e, 0xc7, 0x44, 0x31, 0x87, 0x24, 0x00, 0xf7, 0xcd, 0xdd, 0xe1,
     0xc8, 0xfe, 0xde, 0x46, 0x68, 0x93, 0xe9, 0x3c, 0x1f, 0xad, 0x8a, 0xa6,
     0xf5, 0x5f, 0x1f, 0x0c, 0x6a, 0xa1, 0x1c, 0x39, 0xe1, 0xb5, 0x71, 0xa3,
     0x4f, 0x2f, 0x62, 0x48, 0xcd, 0x52, 0x65, 0x58, 0x7b, 0x84, 0x40, 0x31,
     0x14, 0x4e, 0x01, 0x58, 0x4e, 0x89, 0x9b, 0x3a, 0x04, 0x3e, 0x0f, 0x9d,
     0x66, 0xf0, 0x97, 0x66, 0xcd, 0x8f, 0x02, 0x03, 0x01, 0x00, 0x01, 0x02,
     0x82, 0x01, 0x00, 0x0e, 0xe1, 0x9b, 0x8c, 0xe8, 0xec, 0x4c, 0x4b, 0xd5,
     0xc2, 0x22, 0x7c, 0x0f, 0x34, 0xad, 0xf8, 0x24, 0x99, 0x7b, 0x89, 0xba,
     0x4d, 0x33, 0xe5, 0xeb, 0xb9, 0xfa, 0x11, 0xee, 0xfe, 0x47, 0x19, 0xdc,
     0x5d, 0x7f, 0xa6, 0xd0, 0xa2, 0x29, 0xc1, 0xb8, 0xe6, 0xde, 0x54, 0x7c,
     0x42, 0xc1, 0x93, 0x70, 0xa8, 0xf6, 0x31, 0x60, 0x23, 0x8a, 0xda, 0x80,
     0x70, 0x6b, 0xbb, 0xd5, 0x1e, 0x07, 0xa5, 0x2b, 0x60, 0x51, 0x91, 0x91,
     0x2b, 0xc9, 0xe5, 0x48, 0x74, 0x51, 0x04, 0x3e, 0x38, 0x84, 0x86, 0xbd,
     0xe0, 0xad, 0x96, 0xae, 0x53, 0x67, 0x2b, 0x7a, 0xbf, 0x7e, 0x56, 0x9c,
     0x7c, 0xca, 0x0e, 0xc4, 0xe8, 0x4e, 0xef, 0xf8, 0x1c, 0x0b, 0x76, 0x0e,
     0x13, 0xa6, 0xc2, 0x27, 0x16, 0x72, 0xe5, 0x6e, 0x9a, 0x92, 0x7c, 0x82,
     0x51, 0x83, 0xc5, 0xaf, 0xdd, 0x04, 0x88, 0xa3, 0x17, 0x43, 0xd3, 0x6d,
     0x62, 0x88, 0xc2, 0xd7, 0x12, 0x23, 0xe0, 0xd5, 0xba, 0x26, 0x20, 0x18,
     0x64, 0x81, 0x89, 0xb4, 0xa7, 0xe2, 0xdb, 0x84, 0xb4, 0xc0, 0x2a, 0x34,
     0x99, 0x7f, 0x7d, 0x22, 0x7b, 0x6b, 0x46, 0x21, 0x00, 0x57, 0x9a, 0x96,
     0x4c, 0x4a, 0x01, 0x8d, 0x28, 0xd3, 0xb6, 0xb2, 0xa2, 0xbf, 0xa5, 0x7f,
     0x7c, 0x97, 0xfa, 0x8b, 0xc5, 0x4f, 0xa4, 0x52, 0x9a, 0xb5, 0xad, 0x1c,
     0x05, 0xb9, 0x9a, 0x96, 0x09, 0x9d, 0x43, 0x6f, 0x82, 0x8a, 0x82, 0x6d,
     0x6c, 0x90, 0x49, 0x37, 0xe1, 0xad, 0x6d, 0x5b, 0x7d, 0xb3, 0xe9, 0xd3,
     0xb5, 0xdf, 0x87, 0x86, 0x0a, 0x96, 0x3b, 0xe1, 0x92, 0x50, 0x56, 0x07,
     0x9b, 0xf0, 0xf7, 0xf3, 0xca, 0x9e, 0x88, 0xab, 0xb1, 0x31, 0x79, 0xd8,
     0xe6, 0xf5, 0x17, 0x7a, 0x97, 0x2c, 0x57, 0xd7, 0xbf, 0xfa, 0x1a, 0x0b,
     0x9e, 0x59, 0x17, 0x87, 0x60, 0x33, 0x6d, 0x02, 0x81, 0x81, 0x00, 0xdb,
     0x0a, 0xa8, 0x10, 0x0f, 0x10, 0x78, 0xaf, 0x3a, 0x07, 0x6d, 0x1a, 0x31,
     0x24, 0x1e, 0xc3, 0xc4, 0x51, 0x41, 0xed, 0xa0, 0xbe, 0xdd, 0x60, 0xe4,
     0xde, 0x67, 0x34, 0xd6, 0xe2, 0x43, 0x5e, 0xe3, 0x38, 0xf2, 0x61, 0x3a,
     0x3c, 0xda, 0xa3, 0x96, 0x11, 0x19, 0x75, 0x89, 0xa3, 0x89, 0xf5, 0xb4,
     0x3d, 0x7c, 0xe9, 0xff, 0x72, 0xd6, 0xef, 0xd8, 0x2c, 0x97, 0x28, 0xdb,
     0xa4, 0x25, 0x9d, 0x37, 0xf2, 0xf6, 0xfc, 0x11, 0x4d, 0xba, 0x7b, 0x4f,
     0x44, 0xa2, 0x2d, 0x8b, 0x57, 0x5c, 0xc0, 0x02, 0xe3, 0xc6, 0x7c, 0xce,
     0x6c, 0xae, 0xb7, 0x9c, 0xe0, 0x7b, 0x51, 0x1d, 0x38, 0x7c, 0xcc, 0x6b,
     0x78, 0x13, 0x15, 0x28, 0x16, 0x02, 0xf6, 0xc7, 0xaf, 0x11, 0x10, 0x05,
     0x79, 0xc9, 0xa4, 0xee, 0x55, 0x43, 0xfb, 0x3e, 0x0e, 0x82, 0x34, 0x7e,
     0x91, 0x18, 0x6e, 0x07, 0x53, 0x25, 0x0d, 0x02, 0x81, 0x81, 0x00, 0xd0,
     0x83, 0x0a, 0x48, 0xe0, 0x2e, 0x01, 0x8b, 0x93, 0xa0, 0xba, 0x1c, 0xc0,
     0xe7, 0x08, 0x6f, 0x3c, 0x9c, 0x04, 0xfd, 0xea, 0x89, 0x11, 0x3e, 0x8a,
     0x4f, 0x5b, 0x27, 0x7a, 0x84, 0x6e, 0x01, 0x9e, 0x7e, 0xaf, 0x55, 0xc8,
     0xe4, 0xe8, 0x4f, 0xaf, 0x84, 0x65, 0x5f, 0x85, 0x2b, 0x7d, 0x2a, 0x14,
     0x0b, 0x08, 0x77, 0x51, 0x8d, 0xae, 0x23, 0xff, 0xf2, 0xdb, 0x0d, 0xb6,
     0xb1, 0xc3, 0x2b, 0x6c, 0x9b, 0x3b, 0x02, 0x5c, 0x87, 0xa3, 0xa6, 0x27,
     0x2a, 0x50, 0x1b, 0xf0, 0xda, 0x0d, 0x35, 0x25, 0xc6, 0x43, 0xb7, 0x94,
     0x15, 0x98, 0xa8, 0xe2, 0xfd, 0x29, 0x56, 0x53, 0xce, 0x84, 0x57, 0x4a,
     0x1f, 0x20, 0x1a, 0x49, 0x10, 0x54, 0xcc, 0x9b, 0x95, 0x8d, 0x3f, 0x50,
     0xfe, 0x3d, 0x8d, 0x03, 0x9e, 0xf1, 0x98, 0x37, 0xaa, 0xc1, 0x00, 0x0c,
     0xb5, 0xa2, 0xf9, 0x95, 0xa3, 0x8e, 0x0b, 0x02, 0x81, 0x80, 0x08, 0x24,
     0x49, 0x42, 0xef, 0x8c, 0x69, 0x2f, 0xfa, 0x34, 0x34, 0x75, 0xf8, 0xc5,
     0xa2, 0xef, 0x1b, 0xe8, 0xf9, 0x4e, 0x5f, 0xdf, 0x38, 0x53, 0x55, 0xae,
     0x7e, 0x9f, 0x94, 0x2d, 0x2c, 0xdb, 0xe6, 0x0e, 0x43, 0xd4, 0x21, 0x5a,
     0x09, 0xb6, 0x72, 0xe9, 0x87, 0xcc, 0xba, 0xa4, 0xfd, 0x87, 0xc8, 0x7f,
     0x50, 0x99, 0x52, 0x09, 0x6e, 0xbb, 0xd3, 0x89, 0x34, 0xc5, 0x2c, 0x04,
     0xd9, 0xf1, 0x12, 0x17, 0x51, 0xde, 0xe4, 0xb5, 0xc2, 0xec, 0xba, 0x71,
     0x8e, 0xa5, 0xaa, 0xbc, 0x40, 0x92, 0x52, 0x89, 0x2c, 0xe3, 0x8e, 0xb8,
     0xb3, 0x75, 0xd7, 0xba, 0xf0, 0x5a, 0x7f, 0x7f, 0x8e, 0x03, 0xfb, 0x2a,
     0xa7, 0x6a, 0xed, 0xe6, 0x83, 0x8d, 0xb0, 0xb6, 0x6d, 0x27, 0xef, 0x4c,
     0x2b, 0x96, 0x99, 0xd5, 0x49, 0x85, 0x99, 0x34, 0xe8, 0xda, 0x12, 0xaa,
     0x4a, 0x02, 0x2c, 0xfb, 0x86, 0x31, 0x02, 0x81, 0x81, 0x00, 0x96, 0x2b,
     0xca, 0x5c, 0x72, 0x18, 0xb0, 0x44, 0x36, 0x2e, 0xab, 0xdb, 0xc9, 0x92,
     0x9b, 0x20, 0x82, 0x26, 0x5b, 0xf2, 0x03, 0xd8, 0x73, 0xf2, 0xf6, 0xe9,
     0xf0, 0x5c, 0x9e, 0x80, 0x82, 0x39, 0xe8, 0x4c, 0x95, 0x3a, 0xd3, 0x55,
     0x09, 0x7b, 0x5a, 0x8d, 0x9f, 0xf5, 0x0b, 0x94, 0x26, 0xb1, 0x07, 0x7e,
     0x6a, 0xba, 0x84, 0xa1, 0xe5, 0xa9, 0x47, 0xcd, 0x40, 0xb6, 0xbf, 0xbd,
     0x87, 0x32, 0xdf, 0x25, 0x6d, 0x7a, 0x65, 0xe9, 0xca, 0x92, 0xff, 0xe2,
     0x19, 0x90, 0x06, 0x07, 0x05, 0x3c, 0x21, 0xd8, 0x89, 0x2c, 0xce, 0x1a,
     0x3f, 0xb8, 0x62, 0xc2, 0xb1, 0xe2, 0xda, 0xb9, 0x01, 0xd7, 0x5c, 0x2a,
     0xce, 0x94, 0x1f, 0xcb, 0x03, 0x47, 0xd9, 0x45, 0xfc, 0x54, 0x7d, 0xa0,
     0x9d, 0xf3, 0xd1, 0x87, 0xc7, 0xb8, 0x39, 0x5f, 0x61, 0x61, 0x07, 0xc6,
     0x49, 0x7a, 0x37, 0xab, 0x73, 0xc1, 0x02, 0x81, 0x81, 0x00, 0x9b, 0x62,
     0x86, 0x1c, 0xfd, 0x9e, 0x32, 0xf0, 0x1e, 0x09, 0x49, 0xea, 0x5b, 0xb7,
     0x65, 0x0f, 0x4c, 0x44, 0xd6, 0x2b, 0x66, 0x95, 0x85, 0x13, 0xe7, 0x9a,
     0xea, 0xb5, 0xc7, 0x05, 0x33, 0xe6, 0x04, 0x9f, 0x08, 0x62, 0xd0, 0xf1,
     0x0f, 0x06, 0xe9, 0xc7, 0x72, 0x2a, 0x63, 0xae, 0x66, 0x9c, 0x84, 0xef,
     0x2a, 0x92, 0x5e, 0x58, 0xdc, 0x85, 0x73, 0xad, 0xcb, 0x28, 0x26, 0x5b,
     0x67, 0x9a, 0x81, 0x60, 0xdb, 0x6a, 0x51, 0x7e, 0x81, 0xbc, 0x0e, 0xe4,
     0xdb, 0x13, 0x2a, 0x6c, 0x95, 0x86, 0x99, 0x48, 0xdf, 0x00, 0x54, 0x29,
     0x68, 0xcb, 0x20, 0xaa, 0x9f, 0x0a, 0xe5, 0x8f, 0xd3, 0x15, 0x97, 0xc6,
     0xf3, 0xa2, 0xd8, 0x26, 0x05, 0xf0, 0x4e, 0x04, 0x25, 0x50, 0xe8, 0x19,
     0xa9, 0x93, 0xaf, 0xb0, 0x08, 0xb7, 0x7a, 0xcb, 0x53, 0x81, 0x7d, 0xe6,
     0x57, 0x01, 0x2f, 0x06, 0x26, 0x19});

// TODO(b:314810831, b:325026413): Update the signatures to match the key used
// for testing defined by PolicyBuilder, or update them to support the
// PublicKeyVerificationData type included in new_public_key_verification_data.
constexpr char kSigningKey1[] =
    "MIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEA2c3KzcPqvnJ5HCk3OZkf1"
    "LMO8Ht4dw4FO2U0EmKvpo0zznj4RwUdmKobH1AFWzwZP4CDY2M67MsukE/1Jnbx1QIDAQ"
    "ABAkBkKcLZa/75hHVz4PR3tZaw34PATlfxEG6RiRIwXlf/FFlfGIZOSxdW/I1A3XRl0/9"
    "nZMuctBSKBrcTRZQWfT/hAiEA9g8xbQbMO6BEH/XCRSsQbPlvj4c9wDtVEzeAzZ/ht9kC"
    "IQDiml+/lXS1emqml711jJcYJNYJzdy1lL/ieKogR59oXQIhAK+Pl4xa1U2VxAWpq7r+R"
    "vH55wdZT03hB4p2h4gvEzXBAiAkw9kvE0eZPiBZoRrrHIFTOH7FnnHlwBmV2+/2RsiVPQ"
    "IhAKqx/4qisivvmoM/xbzUagfoxwsu1A/4mGjhBKiS0BCq";

constexpr char kSigningKey2[] =
    "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAmZhreV04M3knCi6wibr49"
    "oDesHny1G33PKOX9ko8pcxAiu9ZqsKCj7wNW2PGqnLi81fddACwQtYn5xdhCtzB9wIDAQ"
    "ABAkA0z8m0cy8N08xundspoFZWO71WJLgv/peSDBYGI0RzJR1l9Np355EukQUQwRs5XrL"
    "3vRQZy2vDqeiR96epkAhRAiEAzJ4DVI8k3pAl7CGv5icqFkJ02viExIwehhIEXBcB6p0C"
    "IQDAKmzpoRpBEZRQ9xrTvPOi+Ea8Jnd478BU7CI/LFfgowIgMfLIoVWoDGRnvXKju60Hy"
    "xNB70oHLut9cADp64j6QMkCIDrgxN4QbmrhaAAmtiGKE1wrlgCwCIsVamiasSOKAqLhAi"
    "EAo/ItVcFtQPod97qG71CY/O4JzOciuU6AMhprs181vfM=";

constexpr char kTestDomain1Signature1[] =
    "l+sT5mziei/GbmiP7VtRCCfwpZcg7uKbW2OlnK5B/TTELutjEIAMdHduNBwbO44qOn"
    "/5c7YrtkXbBehaaDYFPGI6bGTbDmG9KRxhS+DaB7opgfCQWLi79Gn/jytKLZhRN/VS"
    "y+PEbezqMi3d1/xDxlThwWZDNwnhv9ER/Nu/32ZTjzgtqonSn2CQtwXCIILm4FdV/1"
    "/BdmZG+Ge4i4FTqYtInir5YFe611KXU/AveGhQGBIAXo4qYg1IqbVrvKBSU9dlI6Sl"
    "9TJJLbJ3LGaXuljgFhyMAl3gcy7ftC9MohEmwa+sc7y2mOAgYQ5SSmyAtQwQgAkX9J"
    "3+tfxjmoA/dg==";

constexpr char kTestDomain1Signature2[] =
    "cO0nQjRptkeefKDw5QpJSQDavHABxUvbR9Wvoa235OG9Whw1RFqq2ye6pKnI3ezW6/"
    "7b4ANcpi5a7HV5uF8K7gWyYdxY8NHLeyrbwXxg5j6HAmHmkP1UZcf/dAnWqo7cW8g4"
    "DIQOhC43KkveMYJ2HnelwdXt/7zqkbe8/3Yj4nhjAUeARx86Sb8Nzydwkrvqs5Jw/x"
    "5LG+BODExrXXcGu/ubDlW4ivJFqfNUPQysqBXSMY2XCHPJDx3eECLGVVN/fFAWWgjM"
    "HFObAriAt0b18cc9Nr0mAt4Qq1oDzWcAHCPHE+5dr8Uf46BUrMLJRNRKCY7rrsoIin"
    "9Be9gs3W+Aww==";

constexpr char kTestDomain2Signature1[] =
    "TzBiigZKwBdr6lyP6tUDsw+Q9wYO1Yepyxm0O4JZ4RID32L27sWzC1/hwC51fRcCvP"
    "luEVIW6mH+BFODXMrteUFWfbbG7jgV+Wg+QdzMqgJjxhNKFXPTsZ7/286LAd1vBY/A"
    "nGd8Wog6AhzfrgMbLNsH794GD0xIUwRvXUWFNP8pClj5VPgQnJrIA9aZwW8FNGbteA"
    "HacFB0T/oqP5s7XT4Qvkj14RLmCgTwEM8Vcpqy5teJaF8yN17wniveddoOQGH6s0HC"
    "ocprEccrH5fP/WVAPxCfx4vVYQY5q4CZ4K3f6dTC2FV4IDelM6dugEkvSS02YCzDaO"
    "N+Z7IwElzTKg==";

constexpr char kTestDomain2Signature2[] =
    "mr+9CCYvR0cTvPwlzkxqlpGYy55gY7cPiIkPAPoql51yHK1tkMTOSFru8Dy/nMt+0o"
    "4z7WO60F1wnIBGkQxnTj/DsO6QpCYi7oHqtLmZ2jsLQFlMyvPGUtpJEFvRwjr/TNbh"
    "6RqUtz1LQFuJQ848kBrx7nkte1L8SuPDExgx+Q3LtbNj4SuTdvMUBMvEERXiLuwfFL"
    "BefGjtsqfWETQVlJTCW7xcqOLedIX8UYgEDBpDOZ23A3GzCShuBsIut5m87R5mODht"
    "EUmKNDK1+OMc6SyDpf+r48Wph4Db1bVaKy8fcpSNJOwEgsrmH7/+owKPGcN7I5jYAF"
    "Z2PGxHTQ9JNA==";

constexpr char kTestDomain3Signature1[] =
    "T0wXC5w3GXyovA09pyOLX7ui/NI603UfbZXYyTbHI7xtzCIaHVPH35Nx4zdqVrdsej"
    "ErQ12yVLDDIJokY4Yl+/fj/zrkAPxThI+TNQ+jo0i+al05PuopfpzvCzIXiZBbkbyW"
    "3XfedxXP3IPN2XU2/3vX+ZXUNG6pxeETem64kGezkjkUraqnHw3JVzwJYHhpMcwdLP"
    "PYK6V23BbEHEVBtQZd/ledXacz7gOzm1zGni4e+vxA2roAdJWyhbjU0dTKNNUsZmMv"
    "ryQH9Af1Jw+dqs0RAbhcJXm2i8EUWIgNv6aMn1Z2DzZwKKjXsKgcYSRo8pdYa8RZAo"
    "UExd9roA9a5w==";

constexpr char kTestDomain3Signature2[] =
    "o5MVSo4bRwIJ/aooGyXpRXsEsWPG8fNA2UTG8hgwnLYhNeJCCnLs/vW2vdp0URE8jn"
    "qiG4N8KjbuiGw0rJtO1EygdLfpnMEtqYlFjrOie38sy92l/AwohXj6luYzMWL+FqDu"
    "WQeXasjgyY4s9BOLQVDEnEj3pvqhrk/mXvMwUeXGpbxTNbWAd0C8BTZrGOwU/kIXxo"
    "vAMGg8L+rQaDwBTEnMsMZcvlrIyqSg5v4BxCWuL3Yd2xvUqZEUWRp1aKetsHRnz5hw"
    "H7WK7DzvKepDn06XjPG9lchi448U3HB3PRKtCzfO3nD9YXMKTuqRpKPF8PeK11CWh1"
    "DBvBYwi20vbQ==";

constexpr char kWildCard[] = "*";

crypto::keypair::PrivateKey DecodePrivateKey(const char* const encoded) {
  std::string to_decrypt;
  CHECK(base::Base64Decode(encoded, &to_decrypt));

  return *crypto::keypair::PrivateKey::FromPrivateKeyInfo(
      base::as_byte_span(to_decrypt));
}

std::string Decode64(const std::string& str64) {
  std::string result;
  CHECK(base::Base64Decode(str64, &result));
  return result;
}

void InitSigningKeys(std::vector<SignatureProvider::SigningKey>* signing_keys) {
  signing_keys->push_back(SignatureProvider::SigningKey(
      DecodePrivateKey(kSigningKey1),
      {
          {SignatureProvider::kTestDomain1, Decode64(kTestDomain1Signature1)},
          {SignatureProvider::kTestDomain2, Decode64(kTestDomain2Signature1)},
          {SignatureProvider::kTestDomain3, Decode64(kTestDomain3Signature1)},
      }));

  signing_keys->push_back(SignatureProvider::SigningKey(
      DecodePrivateKey(kSigningKey2),
      {
          {SignatureProvider::kTestDomain1, Decode64(kTestDomain1Signature2)},
          {SignatureProvider::kTestDomain2, Decode64(kTestDomain2Signature2)},
          {SignatureProvider::kTestDomain3, Decode64(kTestDomain3Signature2)},
      }));
}

}  // namespace

constexpr char SignatureProvider::kTestDomain1[];
constexpr char SignatureProvider::kTestDomain2[];
constexpr char SignatureProvider::kTestDomain3[];

SignatureProvider::SigningKey::SigningKey(
    crypto::keypair::PrivateKey private_key,
    const std::map<std::string, std::string>& signatures)
    : private_key_(std::move(private_key)), signatures_(signatures) {
  public_key_ = base::as_string_view(private_key_.ToSubjectPublicKeyInfo());
}

SignatureProvider::SigningKey::SigningKey(
    SignatureProvider::SigningKey&& signing_key) = default;

SignatureProvider::SigningKey& SignatureProvider::SigningKey::operator=(
    SignatureProvider::SigningKey&& signing_key) = default;

SignatureProvider::SigningKey::~SigningKey() = default;

bool SignatureProvider::SigningKey::GetSignatureForDomain(
    const std::string& domain,
    std::string* signature) const {
  auto domain_signature = signatures_.find(domain);
  if (domain_signature != signatures_.end()) {
    signature->assign(domain_signature->second);
    return true;
  }

  auto wildcard_signature = signatures_.find(kWildCard);
  if (wildcard_signature != signatures_.end()) {
    signature->assign(wildcard_signature->second);
    return true;
  }

  return false;
}

bool SignatureProvider::SigningKey::Sign(
    const std::string& str,
    em::PolicyFetchRequest::SignatureType signature_type,
    std::string* signature) const {
  crypto::sign::SignatureKind kind;
  switch (signature_type) {
    case em::PolicyFetchRequest::SHA256_RSA:
      kind = crypto::sign::SignatureKind::RSA_PKCS1_SHA256;
      break;
    case em::PolicyFetchRequest::NONE:
    case em::PolicyFetchRequest::SHA1_RSA:
      kind = crypto::sign::SignatureKind::RSA_PKCS1_SHA1;
      break;
  }

  std::vector<uint8_t> result =
      crypto::sign::Sign(kind, private_key_, base::as_byte_span(str));
  signature->assign(std::string(result.begin(), result.end()));

  return true;
}

void SignatureProvider::SetUniversalSigningKeys() {
  std::vector<policy::SignatureProvider::SigningKey> universal_signing_keys;
  universal_signing_keys.push_back(policy::SignatureProvider::SigningKey(
      policy::PolicyBuilder::CreateTestSigningKey(),
      {{kWildCard, policy::PolicyBuilder::GetTestSigningKeySignature()}}));
  set_signing_keys(std::move(universal_signing_keys));
}

void SignatureProvider::SetSigningKeysForChildDomain() {
  std::vector<policy::SignatureProvider::SigningKey> universal_signing_keys;
  universal_signing_keys.push_back(policy::SignatureProvider::SigningKey(
      policy::PolicyBuilder::CreateTestSigningKey(),
      {{kWildCard,
        policy::PolicyBuilder::GetTestSigningKeySignatureForChild()}}));
  set_signing_keys(std::move(universal_signing_keys));
}

bool SignatureProvider::SignVerificationData(const std::string& data,
                                             std::string* signature) const {
  std::vector<uint8_t> result =
      crypto::sign::Sign(crypto::sign::SignatureKind::RSA_PKCS1_SHA256,
                         verification_key_, base::as_byte_span(data));
  signature->assign(std::string(result.begin(), result.end()));

  return true;
}

std::string SignatureProvider::GetVerificationPublicKey() {
  return std::string(
      base::as_string_view(verification_key_.ToSubjectPublicKeyInfo()));
}

SignatureProvider::SignatureProvider()
    : verification_key_(*crypto::keypair::PrivateKey::FromPrivateKeyInfo(
          base::span(kVerificationPrivateKey))) {
  InitSigningKeys(&signing_keys_);
}

SignatureProvider::SignatureProvider(SignatureProvider&& signature_provider) =
    default;

SignatureProvider& SignatureProvider::operator=(
    SignatureProvider&& signature_provider) = default;

SignatureProvider::~SignatureProvider() = default;

const SignatureProvider::SigningKey* SignatureProvider::GetKeyByVersion(
    int key_version) const {
  // |key_version| is 1-based.
  if (key_version < 1) {
    return nullptr;
  }
  size_t key_index = static_cast<size_t>(key_version) - 1;
  if (key_index >= signing_keys_.size()) {
    if (!rotate_keys()) {
      return nullptr;
    }
    key_index %= signing_keys_.size();
  }
  return &signing_keys_[key_index];
}

const SignatureProvider::SigningKey* SignatureProvider::GetCurrentKey() const {
  return GetKeyByVersion(current_key_version());
}

}  // namespace policy