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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/hash_value.h"
#include <stdlib.h>
#include <algorithm>
#include <ostream>
#include "base/base64.h"
#include "base/check_op.h"
#include "base/compiler_specific.h"
#include "base/containers/span.h"
#include "base/notreached.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "crypto/sha2.h"
namespace net {
namespace {
constexpr std::string_view kSha256Slash = "sha256/";
} // namespace
HashValue::HashValue(const SHA256HashValue& hash)
: HashValue(HASH_VALUE_SHA256) {
fingerprint.sha256 = hash;
}
HashValue::HashValue(base::span<const uint8_t> hash)
: HashValue(HASH_VALUE_SHA256) {
base::span(fingerprint.sha256).copy_from(hash);
}
bool HashValue::FromString(std::string_view value) {
if (!value.starts_with(kSha256Slash)) {
return false;
}
std::string_view base64_str = value.substr(kSha256Slash.size());
auto decoded = base::Base64Decode(base64_str);
if (!decoded || decoded->size() != span().size()) {
return false;
}
tag_ = HASH_VALUE_SHA256;
span().copy_from(*decoded);
return true;
}
std::string HashValue::ToString() const {
std::string base64_str = base::Base64Encode(span());
switch (tag_) {
case HASH_VALUE_SHA256:
return std::string(kSha256Slash) + base64_str;
}
NOTREACHED();
}
base::span<uint8_t> HashValue::span() {
switch (tag_) {
case HASH_VALUE_SHA256:
return fingerprint.sha256;
}
NOTREACHED();
}
base::span<const uint8_t> HashValue::span() const {
switch (tag_) {
case HASH_VALUE_SHA256:
return fingerprint.sha256;
}
NOTREACHED();
}
bool operator==(const HashValue& lhs, const HashValue& rhs) {
if (lhs.tag_ != rhs.tag_)
return false;
switch (lhs.tag_) {
case HASH_VALUE_SHA256:
return lhs.fingerprint.sha256 == rhs.fingerprint.sha256;
}
NOTREACHED();
}
bool operator<(const HashValue& lhs, const HashValue& rhs) {
if (lhs.tag_ != rhs.tag_)
return lhs.tag_ < rhs.tag_;
switch (lhs.tag_) {
case HASH_VALUE_SHA256:
return lhs.fingerprint.sha256 < rhs.fingerprint.sha256;
}
NOTREACHED();
}
bool operator>(const HashValue& lhs, const HashValue& rhs) {
return rhs < lhs;
}
bool operator<=(const HashValue& lhs, const HashValue& rhs) {
return !(lhs > rhs);
}
bool operator>=(const HashValue& lhs, const HashValue& rhs) {
return !(lhs < rhs);
}
} // namespace net
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