Reland "Cut down /crypto and switch what is left of it to boringssl".

crypto/p224.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CRYPTO_P224_H_
-#define CRYPTO_P224_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/strings/string_piece.h"
-#include "crypto/crypto_export.h"
-
-namespace crypto {
-
-// P224 implements an elliptic curve group, commonly known as P224 and defined
-// in FIPS 186-3, section D.2.2.
-namespace p224 {
-
-// An element of the field (ℤ/pℤ) is represented with 8, 28-bit limbs in
-// little endian order.
-typedef uint32 FieldElement[8];
-
-struct CRYPTO_EXPORT Point {
-  // SetFromString the value of the point from the 56 byte, external
-  // representation. The external point representation is an (x, y) pair of a
-  // point on the curve. Each field element is represented as a big-endian
-  // number < p.
-  bool SetFromString(const base::StringPiece& in);
-
-  // ToString returns an external representation of the Point.
-  std::string ToString() const;
-
-  // An Point is represented in Jacobian form (x/z², y/z³).
-  FieldElement x, y, z;
-};
-
-// kScalarBytes is the number of bytes needed to represent an element of the
-// P224 field.
-static const size_t kScalarBytes = 28;
-
-// ScalarMult computes *out = in*scalar where scalar is a 28-byte, big-endian
-// number.
-void CRYPTO_EXPORT ScalarMult(const Point& in, const uint8* scalar, Point* out);
-
-// ScalarBaseMult computes *out = g*scalar where g is the base point of the
-// curve and scalar is a 28-byte, big-endian number.
-void CRYPTO_EXPORT ScalarBaseMult(const uint8* scalar, Point* out);
-
-// Add computes *out = a+b.
-void CRYPTO_EXPORT Add(const Point& a, const Point& b, Point* out);
-
-// Negate calculates out = -a;
-void CRYPTO_EXPORT Negate(const Point& a, Point* out);
-
-}  // namespace p224
-
-}  // namespace crypto
-
-#endif  // CRYPTO_P224_H_