68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef CTLogVerifier_h
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#define CTLogVerifier_h
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#include "pkix/Input.h"
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#include "pkix/pkix.h"
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#include "SignedCertificateTimestamp.h"
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#include "SignedTreeHead.h"
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namespace mozilla { namespace ct {
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// Verifies Signed Certificate Timestamps (SCTs) provided by a specific log
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// using the public key of that log. Assumes the SCT being verified
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// matches the log by log key ID and signature parameters (an error is returned
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// otherwise).
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// The verification functions return Success if the provided SCT has passed
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// verification, ERROR_BAD_SIGNATURE if failed verification, or other result
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// on error.
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class CTLogVerifier
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{
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public:
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CTLogVerifier();
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// Initializes the verifier with log-specific information.
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// |subjectPublicKeyInfo| is a DER-encoded SubjectPublicKeyInfo.
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// An error is returned if |subjectPublicKeyInfo| refers to an unsupported
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// public key.
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pkix::Result Init(pkix::Input subjectPublicKeyInfo);
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// Returns the log's key ID, which is a SHA256 hash of its public key.
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// See RFC 6962, Section 3.2.
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const Buffer& keyId() const { return mKeyId; }
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// Verifies that |sct| contains a valid signature for |entry|.
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// |sct| must be signed by the verifier's log.
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pkix::Result Verify(const LogEntry& entry,
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const SignedCertificateTimestamp& sct);
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// Verifies the signature in |sth|.
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// |sth| must be signed by the verifier's log.
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pkix::Result VerifySignedTreeHead(const SignedTreeHead& sth);
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// Returns true if the signature and hash algorithms in |signature|
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// match those of the log.
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bool SignatureParametersMatch(const DigitallySigned& signature);
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private:
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// Performs the underlying verification using the log's public key. Note
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// that |signature| contains the raw signature data (i.e. without any
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// DigitallySigned struct encoding).
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// Returns Success if passed verification, ERROR_BAD_SIGNATURE if failed
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// verification, or other result on error.
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pkix::Result VerifySignature(pkix::Input data, pkix::Input signature);
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pkix::Result VerifySignature(const Buffer& data, const Buffer& signature);
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Buffer mSubjectPublicKeyInfo;
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Buffer mKeyId;
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DigitallySigned::SignatureAlgorithm mSignatureAlgorithm;
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};
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} } // namespace mozilla::ct
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#endif // CTLogVerifier_h
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