blob: 8f9014efd17e46d6e3be08fcb1421d55aeaec580 [file] [log] [blame]
#include "http2/test_tools/http2_random.h"
#include "absl/strings/escaping.h"
#include "http2/platform/api/http2_logging.h"
#include "http2/platform/api/http2_string_utils.h"
#include "third_party/boringssl/src/include/openssl/chacha.h"
#include "third_party/boringssl/src/include/openssl/rand.h"
static const uint8_t kZeroNonce[12] = {0};
namespace http2 {
namespace test {
Http2Random::Http2Random() {
RAND_bytes(key_, sizeof(key_));
HTTP2_LOG(INFO) << "Initialized test RNG with the following key: " << Key();
}
Http2Random::Http2Random(absl::string_view key) {
std::string decoded_key = absl::HexStringToBytes(key);
QUICHE_CHECK_EQ(sizeof(key_), decoded_key.size());
memcpy(key_, decoded_key.data(), sizeof(key_));
}
std::string Http2Random::Key() const {
return absl::BytesToHexString(
absl::string_view(reinterpret_cast<const char*>(key_), sizeof(key_)));
}
void Http2Random::FillRandom(void* buffer, size_t buffer_size) {
memset(buffer, 0, buffer_size);
uint8_t* buffer_u8 = reinterpret_cast<uint8_t*>(buffer);
CRYPTO_chacha_20(buffer_u8, buffer_u8, buffer_size, key_, kZeroNonce,
counter_++);
}
std::string Http2Random::RandString(int length) {
std::string result;
result.resize(length);
FillRandom(&result[0], length);
return result;
}
uint64_t Http2Random::Rand64() {
union {
uint64_t number;
uint8_t bytes[sizeof(uint64_t)];
} result;
FillRandom(result.bytes, sizeof(result.bytes));
return result.number;
}
double Http2Random::RandDouble() {
union {
double f;
uint64_t i;
} value;
value.i = (1023ull << 52ull) | (Rand64() & 0xfffffffffffffu);
return value.f - 1.0;
}
std::string Http2Random::RandStringWithAlphabet(int length,
absl::string_view alphabet) {
std::string result;
result.resize(length);
for (int i = 0; i < length; i++) {
result[i] = alphabet[Uniform(alphabet.size())];
}
return result;
}
} // namespace test
} // namespace http2