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diff --git a/nss/lib/mozpkix/include/pkix/pkixnss.h b/nss/lib/mozpkix/include/pkix/pkixnss.h
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+++ b/nss/lib/mozpkix/include/pkix/pkixnss.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This code is made available to you under your choice of the following sets
+ * of licensing terms:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+/* Copyright 2013 Mozilla Contributors
+ *
+ * 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.
+ */
+
+#ifndef mozilla_pkix_pkixnss_h
+#define mozilla_pkix_pkixnss_h
+
+#include <seccomon.h>
+#include "mozpkix/pkixtypes.h"
+#include "prerror.h"
+
+namespace mozilla {
+namespace pkix {
+
+// Verifies the PKCS#1.5 signature on the given data using the given RSA public
+// key.
+Result VerifyRSAPKCS1SignedDataNSS(Input data, DigestAlgorithm digestAlgorithm,
+                                   Input signature, Input subjectPublicKeyInfo,
+                                   void* pkcs11PinArg);
+
+// Verifies the RSA-PSS signature on the given data using the given RSA
+// public key.
+Result VerifyRSAPSSSignedDataNSS(Input data, DigestAlgorithm digestAlgorithm,
+                                 Input signature, Input subjectPublicKeyInfo,
+                                 void* pkcs11PinArg);
+
+// Verifies the ECDSA signature on the given data using the given ECC public
+// key.
+Result VerifyECDSASignedDataNSS(Input data, DigestAlgorithm digestAlgorithm,
+                                Input signature, Input subjectPublicKeyInfo,
+                                void* pkcs11PinArg);
+
+// Computes the digest of the given data using the given digest algorithm.
+//
+// item contains the data to hash.
+// digestBuf must point to a buffer to where the digest will be written.
+// digestBufLen must be the size of the buffer, which must be exactly equal
+//              to the size of the digest output (20 for SHA-1, 32 for SHA-256,
+//              etc.)
+//
+// TODO: Taking the output buffer as (uint8_t*, size_t) is counter to our
+// other, extensive, memory safety efforts in mozilla::pkix, and we should find
+// a way to provide a more-obviously-safe interface.
+Result DigestBufNSS(Input item, DigestAlgorithm digestAlg,
+                    /*out*/ uint8_t* digestBuf, size_t digestBufLen);
+
+Result MapPRErrorCodeToResult(PRErrorCode errorCode);
+PRErrorCode MapResultToPRErrorCode(Result result);
+
+// The error codes within each module must fit in 16 bits. We want these
+// errors to fit in the same module as the NSS errors but not overlap with
+// any of them. Converting an NSS SEC, NSS SSL, or PSM error to an NS error
+// involves negating the value of the error and then synthesizing an error
+// in the NS_ERROR_MODULE_SECURITY module. Hence, PSM errors will start at
+// a negative value that both doesn't overlap with the current value
+// ranges for NSS errors and that will fit in 16 bits when negated.
+static const PRErrorCode ERROR_BASE = -0x4000;
+static const PRErrorCode ERROR_LIMIT = ERROR_BASE + 1000;
+
+enum ErrorCode {
+  MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE = ERROR_BASE + 0,
+  MOZILLA_PKIX_ERROR_CA_CERT_USED_AS_END_ENTITY = ERROR_BASE + 1,
+  MOZILLA_PKIX_ERROR_INADEQUATE_KEY_SIZE = ERROR_BASE + 2,
+  MOZILLA_PKIX_ERROR_V1_CERT_USED_AS_CA = ERROR_BASE + 3,
+  MOZILLA_PKIX_ERROR_NO_RFC822NAME_MATCH = ERROR_BASE + 4,
+  MOZILLA_PKIX_ERROR_NOT_YET_VALID_CERTIFICATE = ERROR_BASE + 5,
+  MOZILLA_PKIX_ERROR_NOT_YET_VALID_ISSUER_CERTIFICATE = ERROR_BASE + 6,
+  MOZILLA_PKIX_ERROR_SIGNATURE_ALGORITHM_MISMATCH = ERROR_BASE + 7,
+  MOZILLA_PKIX_ERROR_OCSP_RESPONSE_FOR_CERT_MISSING = ERROR_BASE + 8,
+  MOZILLA_PKIX_ERROR_VALIDITY_TOO_LONG = ERROR_BASE + 9,
+  MOZILLA_PKIX_ERROR_REQUIRED_TLS_FEATURE_MISSING = ERROR_BASE + 10,
+  MOZILLA_PKIX_ERROR_INVALID_INTEGER_ENCODING = ERROR_BASE + 11,
+  MOZILLA_PKIX_ERROR_EMPTY_ISSUER_NAME = ERROR_BASE + 12,
+  MOZILLA_PKIX_ERROR_ADDITIONAL_POLICY_CONSTRAINT_FAILED = ERROR_BASE + 13,
+  MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT = ERROR_BASE + 14,
+  MOZILLA_PKIX_ERROR_MITM_DETECTED = ERROR_BASE + 15,
+  END_OF_LIST
+};
+
+void RegisterErrorTable();
+
+inline SECItem UnsafeMapInputToSECItem(Input input) {
+  SECItem result = {siBuffer, const_cast<uint8_t*>(input.UnsafeGetData()),
+                    input.GetLength()};
+  static_assert(sizeof(decltype(input.GetLength())) <= sizeof(result.len),
+                "input.GetLength() must fit in a SECItem");
+  return result;
+}
+}  // namespace pkix
+}  // namespace mozilla
+
+#endif  // mozilla_pkix_pkixnss_h