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// Copyright 2020 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/ssl/cert_compression.h"
#include <cstdint>
#include "third_party/boringssl/src/include/openssl/ssl.h"
#if !defined(NET_DISABLE_BROTLI)
#include "third_party/brotli/include/brotli/decode.h"
#endif
namespace net {
namespace {
#if !defined(NET_DISABLE_BROTLI)
int DecompressBrotliCert(SSL* ssl,
CRYPTO_BUFFER** out,
size_t uncompressed_len,
const uint8_t* in,
size_t in_len) {
uint8_t* data;
bssl::UniquePtr<CRYPTO_BUFFER> decompressed(
CRYPTO_BUFFER_alloc(&data, uncompressed_len));
if (!decompressed) {
return 0;
}
size_t output_size = uncompressed_len;
if (BrotliDecoderDecompress(in_len, in, &output_size, data) !=
BROTLI_DECODER_RESULT_SUCCESS ||
output_size != uncompressed_len) {
return 0;
}
*out = decompressed.release();
return 1;
}
#endif
} // namespace
void ConfigureCertificateCompression(SSL_CTX* ctx) {
#if !defined(NET_DISABLE_BROTLI)
SSL_CTX_add_cert_compression_alg(ctx, TLSEXT_cert_compression_brotli,
nullptr /* compression not supported */,
DecompressBrotliCert);
#endif
// Avoid "unused argument" errors in case no algorithms are supported.
(void)(ctx);
}
} // namespace net
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