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122 lines
4.2 KiB
C++
122 lines
4.2 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_SSL_TOKEN_BINDING_H_
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#define NET_SSL_TOKEN_BINDING_H_
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#include <string>
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#include <vector>
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#include "base/strings/string_piece.h"
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#include "net/base/net_errors.h"
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#include "net/base/net_export.h"
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namespace crypto {
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class ECPrivateKey;
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}
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namespace net {
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enum class TokenBindingType {
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PROVIDED = 0,
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REFERRED = 1,
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};
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// Takes an exported keying material value |ekm| from the TLS layer, the type of
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// Token Binding |type|, and a token binding key |key| and concatenates the
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// Token Binding type, key type, and ekm. This concatenation is signed with
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// |key| in accordance with section 3.3 of draft-ietf-tokbind-protocol-10, with
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// the signature written to |*out|. Returns true on success or false if there's
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// an error in the signing operations.
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bool CreateTokenBindingSignature(base::StringPiece ekm,
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TokenBindingType type,
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crypto::ECPrivateKey* key,
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std::vector<uint8_t>* out);
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// Given a vector of serialized TokenBinding structs (as defined in
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// draft-ietf-tokbind-protocol-04), this function combines them to form the
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// serialized TokenBindingMessage struct in |*out|. This function returns a net
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// error.
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//
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// struct {
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// TokenBinding tokenbindings<0..2^16-1>;
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// } TokenBindingMessage;
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Error BuildTokenBindingMessageFromTokenBindings(
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const std::vector<base::StringPiece>& token_bindings,
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std::string* out);
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// Builds a TokenBinding struct of type |type| with a TokenBindingID created
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// from |*key| and a signature of |ekm| using |*key| to sign.
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//
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// enum {
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// rsa2048_pkcs1.5(0), rsa2048_pss(1), ecdsap256(2), (255)
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// } TokenBindingKeyParameters;
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//
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// struct {
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// opaque modulus<1..2^16-1>;
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// opaque publicexponent<1..2^8-1>;
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// } RSAPublicKey;
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//
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// struct {
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// opaque point <1..2^8-1>;
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// } ECPoint;
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//
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// enum {
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// provided_token_binding(0), referred_token_binding(1), (255)
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// } TokenBindingType;
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//
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// struct {
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// TokenBindingType tokenbinding_type;
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// TokenBindingKeyParameters key_parameters;
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// select (key_parameters) {
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// case rsa2048_pkcs1.5:
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// case rsa2048_pss:
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// RSAPublicKey rsapubkey;
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// case ecdsap256:
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// ECPoint point;
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// }
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// } TokenBindingID;
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//
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// struct {
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// TokenBindingID tokenbindingid;
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// opaque signature<0..2^16-1>;// Signature over the exported keying
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// // material value
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// Extension extensions<0..2^16-1>;
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// } TokenBinding;
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Error BuildTokenBinding(TokenBindingType type,
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crypto::ECPrivateKey* key,
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const std::vector<uint8_t>& ekm,
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std::string* out);
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// Represents a parsed TokenBinding from a TokenBindingMessage.
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struct TokenBinding {
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TokenBinding();
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TokenBindingType type;
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std::string ec_point;
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std::string signature;
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};
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// Given a TokenBindingMessage, parses the TokenBinding structs from it, putting
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// them into |*token_bindings|. If there is an error parsing the
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// TokenBindingMessage or the key parameter for any TokenBinding in the
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// TokenBindingMessage is not ecdsap256, then this function returns false.
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NET_EXPORT_PRIVATE bool ParseTokenBindingMessage(
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base::StringPiece token_binding_message,
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std::vector<TokenBinding>* token_bindings);
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// Takes an ECPoint |ec_point| from a TokenBindingID, |signature| from a
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// TokenBinding, and a Token Binding type |type| and verifies that |signature|
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// is the signature of |ekm| using |ec_point| as the public key. Returns true if
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// the signature verifies and false if it doesn't or some other error occurs in
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// verification. This function is only provided for testing.
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NET_EXPORT_PRIVATE bool VerifyTokenBindingSignature(base::StringPiece ec_point,
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base::StringPiece signature,
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TokenBindingType type,
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base::StringPiece ekm);
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} // namespace net
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#endif // NET_SSL_TOKEN_BINDING_H_
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