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/*
* ngtcp2
*
* Copyright (c) 2024 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "tls_shared_boringssl.h"
#ifdef HAVE_LIBBROTLI
# include <brotli/encode.h>
# include <brotli/decode.h>
#endif // defined(HAVE_LIBBROTLI)
namespace ngtcp2 {
namespace tls {
#ifdef HAVE_LIBBROTLI
int cert_compress(SSL *ssl, CBB *out, const uint8_t *in, size_t in_len) {
uint8_t *dest;
auto compressed_size = BrotliEncoderMaxCompressedSize(in_len);
if (compressed_size == 0) {
return 0;
}
if (!CBB_reserve(out, &dest, compressed_size)) {
return 0;
}
if (BrotliEncoderCompress(BROTLI_MAX_QUALITY, BROTLI_DEFAULT_WINDOW,
BROTLI_MODE_GENERIC, in_len, in, &compressed_size,
dest) != BROTLI_TRUE) {
return 0;
}
if (!CBB_did_write(out, compressed_size)) {
return 0;
}
return 1;
}
int cert_decompress(SSL *ssl, CRYPTO_BUFFER **out, size_t uncompressed_len,
const uint8_t *in, size_t in_len) {
uint8_t *dest;
auto buf = CRYPTO_BUFFER_alloc(&dest, uncompressed_len);
auto len = uncompressed_len;
if (BrotliDecoderDecompress(in_len, in, &len, dest) !=
BROTLI_DECODER_RESULT_SUCCESS) {
CRYPTO_BUFFER_free(buf);
return 0;
}
if (uncompressed_len != len) {
CRYPTO_BUFFER_free(buf);
return 0;
}
*out = buf;
return 1;
}
#endif // defined(HAVE_LIBBROTLI)
} // namespace tls
} // namespace ngtcp2
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