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//
//
// Copyright 2016 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
#include <grpc/support/port_platform.h>
#include "src/core/lib/surface/validate_metadata.h"
#include "y_absl/status/status.h"
#include "y_absl/strings/escaping.h"
#include "y_absl/strings/str_cat.h"
#include "y_absl/strings/string_view.h"
#include <grpc/grpc.h>
#include "src/core/lib/gprpp/bitset.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/slice/slice_internal.h"
namespace grpc_core {
namespace {
class LegalHeaderKeyBits : public BitSet<256> {
public:
constexpr LegalHeaderKeyBits() {
for (int i = 'a'; i <= 'z'; i++) set(i);
for (int i = '0'; i <= '9'; i++) set(i);
set('-');
set('_');
set('.');
}
};
constexpr LegalHeaderKeyBits g_legal_header_key_bits;
GPR_ATTRIBUTE_NOINLINE
y_absl::Status DoesNotConformTo(y_absl::string_view x, const char* err_desc) {
return y_absl::InternalError(y_absl::StrCat(err_desc, ": ", x, " (hex ",
y_absl::BytesToHexString(x), ")"));
}
y_absl::Status ConformsTo(y_absl::string_view x, const BitSet<256>& legal_bits,
const char* err_desc) {
for (uint8_t c : x) {
if (!legal_bits.is_set(c)) {
return DoesNotConformTo(x, err_desc);
}
}
return y_absl::OkStatus();
}
} // namespace
y_absl::Status ValidateHeaderKeyIsLegal(y_absl::string_view key) {
if (key.empty()) {
return y_absl::InternalError("Metadata keys cannot be zero length");
}
if (key.size() > UINT32_MAX) {
return y_absl::InternalError(
"Metadata keys cannot be larger than UINT32_MAX");
}
return ConformsTo(key, g_legal_header_key_bits, "Illegal header key");
}
} // namespace grpc_core
static int error2int(grpc_error_handle error) {
int r = (error.ok());
return r;
}
grpc_error_handle grpc_validate_header_key_is_legal(const grpc_slice& slice) {
return grpc_core::ValidateHeaderKeyIsLegal(
grpc_core::StringViewFromSlice(slice));
}
int grpc_header_key_is_legal(grpc_slice slice) {
return error2int(grpc_validate_header_key_is_legal(slice));
}
namespace {
class LegalHeaderNonBinValueBits : public grpc_core::BitSet<256> {
public:
constexpr LegalHeaderNonBinValueBits() {
for (int i = 32; i <= 126; i++) {
set(i);
}
}
};
constexpr LegalHeaderNonBinValueBits g_legal_header_non_bin_value_bits;
} // namespace
grpc_error_handle grpc_validate_header_nonbin_value_is_legal(
const grpc_slice& slice) {
return grpc_core::ConformsTo(grpc_core::StringViewFromSlice(slice),
g_legal_header_non_bin_value_bits,
"Illegal header value");
}
int grpc_header_nonbin_value_is_legal(grpc_slice slice) {
return error2int(grpc_validate_header_nonbin_value_is_legal(slice));
}
int grpc_is_binary_header_internal(const grpc_slice& slice) {
return grpc_key_is_binary_header(GRPC_SLICE_START_PTR(slice),
GRPC_SLICE_LENGTH(slice));
}
int grpc_is_binary_header(grpc_slice slice) {
return grpc_is_binary_header_internal(slice);
}
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