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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/hash.h"
#include <ostream>
#include "base/check.h"
#include "base/check_op.h"
#include "base/notreached.h"
#include "third_party/boringssl/src/include/openssl/digest.h"
#include "third_party/boringssl/src/include/openssl/evp.h"
namespace crypto::hash {
namespace {
const EVP_MD* EVPMDForHashKind(HashKind kind) {
switch (kind) {
case HashKind::kSha1:
return EVP_sha1();
case HashKind::kSha256:
return EVP_sha256();
case HashKind::kSha384:
return EVP_sha384();
case HashKind::kSha512:
return EVP_sha512();
}
NOTREACHED();
}
} // namespace
void Hash(HashKind kind,
base::span<const uint8_t> data,
base::span<uint8_t> digest) {
const EVP_MD* md = EVPMDForHashKind(kind);
CHECK_EQ(digest.size(), EVP_MD_size(md));
CHECK(EVP_Digest(data.data(), data.size(), digest.data(), nullptr, md,
nullptr));
}
void Hash(HashKind kind, std::string_view data, base::span<uint8_t> digest) {
Hash(kind, base::as_byte_span(data), digest);
}
std::array<uint8_t, kSha1Size> Sha1(base::span<const uint8_t> data) {
std::array<uint8_t, kSha1Size> result;
Hash(HashKind::kSha1, data, result);
return result;
}
std::array<uint8_t, kSha1Size> Sha1(std::string_view data) {
return Sha1(base::as_byte_span(data));
}
std::array<uint8_t, kSha256Size> Sha256(base::span<const uint8_t> data) {
std::array<uint8_t, kSha256Size> result;
Hash(HashKind::kSha256, data, result);
return result;
}
std::array<uint8_t, kSha256Size> Sha256(std::string_view data) {
return Sha256(base::as_byte_span(data));
}
std::array<uint8_t, kSha512Size> Sha512(base::span<const uint8_t> data) {
std::array<uint8_t, kSha512Size> result;
Hash(HashKind::kSha512, data, result);
return result;
}
std::array<uint8_t, kSha512Size> Sha512(std::string_view data) {
return Sha512(base::as_byte_span(data));
}
Hasher::Hasher(HashKind kind) {
CHECK(EVP_DigestInit(ctx_.get(), EVPMDForHashKind(kind)));
}
Hasher::Hasher(const Hasher& other) {
*this = other;
}
Hasher::Hasher(Hasher&& other) {
*this = other;
}
Hasher& Hasher::operator=(const Hasher& other) {
CHECK(EVP_MD_CTX_copy_ex(ctx_.get(), other.ctx_.get()));
return *this;
}
Hasher& Hasher::operator=(Hasher&& other) {
ctx_ = std::move(other.ctx_);
return *this;
}
Hasher::~Hasher() = default;
void Hasher::Update(base::span<const uint8_t> data) {
CHECK(EVP_MD_CTX_md(ctx_.get()))
<< "Hasher::Update() called after Hasher::Finish()";
CHECK(EVP_DigestUpdate(ctx_.get(), data.data(), data.size()));
}
void Hasher::Update(std::string_view data) {
Update(base::as_byte_span(data));
}
void Hasher::Finish(base::span<uint8_t> digest) {
CHECK(EVP_MD_CTX_md(ctx_.get())) << "Hasher::Finish() called multiple times";
CHECK_EQ(digest.size(), EVP_MD_CTX_size(ctx_.get()));
CHECK(EVP_DigestFinal(ctx_.get(), digest.data(), nullptr));
}
} // namespace crypto::hash
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