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0.13.1
Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support
Security advisory:
This version has known vulnerabilities.
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Files
c_src/boringssl/crypto/dh/dh_asn1.cc
// Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
//
// 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
//
// https://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 <openssl/dh.h>
#include <assert.h>
#include <limits.h>
#include <openssl/bn.h>
#include <openssl/bytestring.h>
#include <openssl/err.h>
#include "../bytestring/internal.h"
#include "../fipsmodule/dh/internal.h"
static int parse_integer(CBS *cbs, BIGNUM **out) {
assert(*out == nullptr);
*out = BN_new();
if (*out == nullptr) {
return 0;
}
return BN_parse_asn1_unsigned(cbs, *out);
}
static int marshal_integer(CBB *cbb, BIGNUM *bn) {
if (bn == nullptr) {
// A DH object may be missing some components.
OPENSSL_PUT_ERROR(DH, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
return BN_marshal_asn1(cbb, bn);
}
DH *DH_parse_parameters(CBS *cbs) {
bssl::UniquePtr<DH> ret(DH_new());
if (ret == nullptr) {
return nullptr;
}
CBS child;
if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
!parse_integer(&child, &ret->p) ||
!parse_integer(&child, &ret->g)) {
OPENSSL_PUT_ERROR(DH, DH_R_DECODE_ERROR);
return nullptr;
}
uint64_t priv_length;
if (CBS_len(&child) != 0) {
if (!CBS_get_asn1_uint64(&child, &priv_length) ||
priv_length > UINT_MAX) {
OPENSSL_PUT_ERROR(DH, DH_R_DECODE_ERROR);
return nullptr;
}
ret->priv_length = (unsigned)priv_length;
}
if (CBS_len(&child) != 0) {
OPENSSL_PUT_ERROR(DH, DH_R_DECODE_ERROR);
return nullptr;
}
if (!dh_check_params_fast(ret.get())) {
OPENSSL_PUT_ERROR(DH, DH_R_DECODE_ERROR);
return nullptr;
}
return ret.release();
}
int DH_marshal_parameters(CBB *cbb, const DH *dh) {
CBB child;
if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
!marshal_integer(&child, dh->p) ||
!marshal_integer(&child, dh->g) ||
(dh->priv_length != 0 &&
!CBB_add_asn1_uint64(&child, dh->priv_length)) ||
!CBB_flush(cbb)) {
OPENSSL_PUT_ERROR(DH, DH_R_ENCODE_ERROR);
return 0;
}
return 1;
}
DH *d2i_DHparams(DH **out, const uint8_t **inp, long len) {
return bssl::D2IFromCBS(out, inp, len, DH_parse_parameters);
}
int i2d_DHparams(const DH *in, uint8_t **outp) {
return bssl::I2DFromCBB(
/*initial_capacity=*/256, outp,
[&](CBB *cbb) -> bool { return DH_marshal_parameters(cbb, in); });
}