/* ====================================================================
 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#define OPENSSL_FIPSAPI

#include <openssl/crypto.h>
#include "modes_lcl.h"
#include <string.h>

#ifndef MODES_DEBUG
# ifndef NDEBUG
#  define NDEBUG
# endif
#endif
#include <assert.h>

#if defined(BSWAP4) && defined(STRICT_ALIGNMENT)
/* redefine, because alignment is ensured */
#undef	GETU32
#define	GETU32(p)	BSWAP4(*(const u32 *)(p))
#undef	PUTU32
#define	PUTU32(p,v)	*(u32 *)(p) = BSWAP4(v)
#endif

#define	PACK(s)		((size_t)(s)<<(sizeof(size_t)*8-16))
#define REDUCE1BIT(V)	do { \
	if (sizeof(size_t)==8) { \
		u64 T = U64(0xe100000000000000) & (0-(V.lo&1)); \
		V.lo  = (V.hi<<63)|(V.lo>>1); \
		V.hi  = (V.hi>>1 )^T; \
	} \
	else { \
		u32 T = 0xe1000000U & (0-(u32)(V.lo&1)); \
		V.lo  = (V.hi<<63)|(V.lo>>1); \
		V.hi  = (V.hi>>1 )^((u64)T<<32); \
	} \
} while(0)

/*
 * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
 * never be set to 8. 8 is effectively reserved for testing purposes.
 * TABLE_BITS>1 are lookup-table-driven implementations referred to as
 * "Shoup's" in GCM specification. In other words OpenSSL does not cover
 * whole spectrum of possible table driven implementations. Why? In
 * non-"Shoup's" case memory access pattern is segmented in such manner,
 * that it's trivial to see that cache timing information can reveal
 * fair portion of intermediate hash value. Given that ciphertext is
 * always available to attacker, it's possible for him to attempt to
 * deduce secret parameter H and if successful, tamper with messages
 * [which is nothing but trivial in CTR mode]. In "Shoup's" case it's
 * not as trivial, but there is no reason to believe that it's resistant
 * to cache-timing attack. And the thing about "8-bit" implementation is
 * that it consumes 16 (sixteen) times more memory, 4KB per individual
 * key + 1KB shared. Well, on pros side it should be twice as fast as
 * "4-bit" version. And for gcc-generated x86[_64] code, "8-bit" version
 * was observed to run ~75% faster, closer to 100% for commercial
 * compilers... Yet "4-bit" procedure is preferred, because it's
 * believed to provide better security-performance balance and adequate
 * all-round performance. "All-round" refers to things like:
 *
 * - shorter setup time effectively improves overall timing for
 *   handling short messages;
 * - larger table allocation can become unbearable because of VM
 *   subsystem penalties (for example on Windows large enough free
 *   results in VM working set trimming, meaning that consequent
 *   malloc would immediately incur working set expansion);
 * - larger table has larger cache footprint, which can affect
 *   performance of other code paths (not necessarily even from same
 *   thread in Hyper-Threading world);
 *
 * Value of 1 is not appropriate for performance reasons.
 */
#if	TABLE_BITS==8

static void gcm_init_8bit(u128 Htable[256], u64 H[2])
{
	int  i, j;
	u128 V;

	Htable[0].hi = 0;
	Htable[0].lo = 0;
	V.hi = H[0];
	V.lo = H[1];

	for (Htable[128]=V, i=64; i>0; i>>=1) {
		REDUCE1BIT(V);
		Htable[i] = V;
	}

	for (i=2; i<256; i<<=1) {
		u128 *Hi = Htable+i, H0 = *Hi;
		for (j=1; j<i; ++j) {
			Hi[j].hi = H0.hi^Htable[j].hi;
			Hi[j].lo = H0.lo^Htable[j].lo;
		}
	}
}

static void gcm_gmult_8bit(u64 Xi[2], const u128 Htable[256])
{
	u128 Z = { 0, 0};
	const u8 *xi = (const u8 *)Xi+15;
	size_t rem, n = *xi;
	const union { long one; char little; } is_endian = {1};
	static const size_t rem_8bit[256] = {
		PACK(0x0000), PACK(0x01C2), PACK(0x0384), PACK(0x0246),
		PACK(0x0708), PACK(0x06CA), PACK(0x048C), PACK(0x054E),
		PACK(0x0E10), PACK(0x0FD2), PACK(0x0D94), PACK(0x0C56),
		PACK(0x0918), PACK(0x08DA), PACK(0x0A9C), PACK(0x0B5E),
		PACK(0x1C20), PACK(0x1DE2), PACK(0x1FA4), PACK(0x1E66),
		PACK(0x1B28), PACK(0x1AEA), PACK(0x18AC), PACK(0x196E),
		PACK(0x1230), PACK(0x13F2), PACK(0x11B4), PACK(0x1076),
		PACK(0x1538), PACK(0x14FA), PACK(0x16BC), PACK(0x177E),
		PACK(0x3840), PACK(0x3982), PACK(0x3BC4), PACK(0x3A06),
		PACK(0x3F48), PACK(0x3E8A), PACK(0x3CCC), PACK(0x3D0E),
		PACK(0x3650), PACK(0x3792), PACK(0x35D4), PACK(0x3416),
		PACK(0x3158), PACK(0x309A), PACK(0x32DC), PACK(0x331E),
		PACK(0x2460), PACK(0x25A2), PACK(0x27E4), PACK(0x2626),
		PACK(0x2368), PACK(0x22AA), PACK(0x20EC), PACK(0x212E),
		PACK(0x2A70), PACK(0x2BB2), PACK(0x29F4), PACK(0x2836),
		PACK(0x2D78), PACK(0x2CBA), PACK(0x2EFC), PACK(0x2F3E),
		PACK(0x7080), PACK(0x7142), PACK(0x7304), PACK(0x72C6),
		PACK(0x7788), PACK(0x764A), PACK(0x740C), PACK(0x75CE),
		PACK(0x7E90), PACK(0x7F52), PACK(0x7D14), PACK(0x7CD6),
		PACK(0x7998), PACK(0x785A), PACK(0x7A1C), PACK(0x7BDE),
		PACK(0x6CA0), PACK(0x6D62), PACK(0x6F24), PACK(0x6EE6),
		PACK(0x6BA8), PACK(0x6A6A), PACK(0x682C), PACK(0x69EE),
		PACK(0x62B0), PACK(0x6372), PACK(0x6134), PACK(0x60F6),
		PACK(0x65B8), PACK(0x647A), PACK(0x663C), PACK(0x67FE),
		PACK(0x48C0), PACK(0x4902), PACK(0x4B44), PACK(0x4A86),
		PACK(0x4FC8), PACK(0x4E0A), PACK(0x4C4C), PACK(0x4D8E),
		PACK(0x46D0), PACK(0x4712), PACK(0x4554), PACK(0x4496),
		PACK(0x41D8), PACK(0x401A), PACK(0x425C), PACK(0x439E),
		PACK(0x54E0), PACK(0x5522), PACK(0x5764), PACK(0x56A6),
		PACK(0x53E8), PACK(0x522A), PACK(0x506C), PACK(0x51AE),
		PACK(0x5AF0), PACK(0x5B32), PACK(0x5974), PACK(0x58B6),
		PACK(0x5DF8), PACK(0x5C3A), PACK(0x5E7C), PACK(0x5FBE),
		PACK(0xE100), PACK(0xE0C2), PACK(0xE284), PACK(0xE346),
		PACK(0xE608), PACK(0xE7CA), PACK(0xE58C), PACK(0xE44E),
		PACK(0xEF10), PACK(0xEED2), PACK(0xEC94), PACK(0xED56),
		PACK(0xE818), PACK(0xE9DA), PACK(0xEB9C), PACK(0xEA5E),
		PACK(0xFD20), PACK(0xFCE2), PACK(0xFEA4), PACK(0xFF66),
		PACK(0xFA28), PACK(0xFBEA), PACK(0xF9AC), PACK(0xF86E),
		PACK(0xF330), PACK(0xF2F2), PACK(0xF0B4), PACK(0xF176),
		PACK(0xF438), PACK(0xF5FA), PACK(0xF7BC), PACK(0xF67E),
		PACK(0xD940), PACK(0xD882), PACK(0xDAC4), PACK(0xDB06),
		PACK(0xDE48), PACK(0xDF8A), PACK(0xDDCC), PACK(0xDC0E),
		PACK(0xD750), PACK(0xD692), PACK(0xD4D4), PACK(0xD516),
		PACK(0xD058), PACK(0xD19A), PACK(0xD3DC), PACK(0xD21E),
		PACK(0xC560), PACK(0xC4A2), PACK(0xC6E4), PACK(0xC726),
		PACK(0xC268), PACK(0xC3AA), PACK(0xC1EC), PACK(0xC02E),
		PACK(0xCB70), PACK(0xCAB2), PACK(0xC8F4), PACK(0xC936),
		PACK(0xCC78), PACK(0xCDBA), PACK(0xCFFC), PACK(0xCE3E),
		PACK(0x9180), PACK(0x9042), PACK(0x9204), PACK(0x93C6),
		PACK(0x9688), PACK(0x974A), PACK(0x950C), PACK(0x94CE),
		PACK(0x9F90), PACK(0x9E52), PACK(0x9C14), PACK(0x9DD6),
		PACK(0x9898), PACK(0x995A), PACK(0x9B1C), PACK(0x9ADE),
		PACK(0x8DA0), PACK(0x8C62), PACK(0x8E24), PACK(0x8FE6),
		PACK(0x8AA8), PACK(0x8B6A), PACK(0x892C), PACK(0x88EE),
		PACK(0x83B0), PACK(0x8272), PACK(0x8034), PACK(0x81F6),
		PACK(0x84B8), PACK(0x857A), PACK(0x873C), PACK(0x86FE),
		PACK(0xA9C0), PACK(0xA802), PACK(0xAA44), PACK(0xAB86),
		PACK(0xAEC8), PACK(0xAF0A), PACK(0xAD4C), PACK(0xAC8E),
		PACK(0xA7D0), PACK(0xA612), PACK(0xA454), PACK(0xA596),
		PACK(0xA0D8), PACK(0xA11A), PACK(0xA35C), PACK(0xA29E),
		PACK(0xB5E0), PACK(0xB422), PACK(0xB664), PACK(0xB7A6),
		PACK(0xB2E8), PACK(0xB32A), PACK(0xB16C), PACK(0xB0AE),
		PACK(0xBBF0), PACK(0xBA32), PACK(0xB874), PACK(0xB9B6),
		PACK(0xBCF8), PACK(0xBD3A), PACK(0xBF7C), PACK(0xBEBE) };

	while (1) {
		Z.hi ^= Htable[n].hi;
		Z.lo ^= Htable[n].lo;

		if ((u8 *)Xi==xi)	break;

		n = *(--xi);

		rem  = (size_t)Z.lo&0xff;
		Z.lo = (Z.hi<<56)|(Z.lo>>8);
		Z.hi = (Z.hi>>8);
		if (sizeof(size_t)==8)
			Z.hi ^= rem_8bit[rem];
		else
			Z.hi ^= (u64)rem_8bit[rem]<<32;
	}

	if (is_endian.little) {
#ifdef BSWAP8
		Xi[0] = BSWAP8(Z.hi);
		Xi[1] = BSWAP8(Z.lo);
#else
		u8 *p = (u8 *)Xi;
		u32 v;
		v = (u32)(Z.hi>>32);	PUTU32(p,v);
		v = (u32)(Z.hi);	PUTU32(p+4,v);
		v = (u32)(Z.lo>>32);	PUTU32(p+8,v);
		v = (u32)(Z.lo);	PUTU32(p+12,v);
#endif
	}
	else {
		Xi[0] = Z.hi;
		Xi[1] = Z.lo;
	}
}
#define GCM_MUL(ctx,Xi)   gcm_gmult_8bit(ctx->Xi.u,ctx->Htable)

#elif	TABLE_BITS==4

static void gcm_init_4bit(u128 Htable[16], u64 H[2])
{
	u128 V;
#if defined(OPENSSL_SMALL_FOOTPRINT)
	int  i;
#endif

	Htable[0].hi = 0;
	Htable[0].lo = 0;
	V.hi = H[0];
	V.lo = H[1];

#if defined(OPENSSL_SMALL_FOOTPRINT)
	for (Htable[8]=V, i=4; i>0; i>>=1) {
		REDUCE1BIT(V);
		Htable[i] = V;
	}

	for (i=2; i<16; i<<=1) {
		u128 *Hi = Htable+i;
		int   j;
		for (V=*Hi, j=1; j<i; ++j) {
			Hi[j].hi = V.hi^Htable[j].hi;
			Hi[j].lo = V.lo^Htable[j].lo;
		}
	}
#else
	Htable[8] = V;
	REDUCE1BIT(V);
	Htable[4] = V;
	REDUCE1BIT(V);
	Htable[2] = V;
	REDUCE1BIT(V);
	Htable[1] = V;
	Htable[3].hi  = V.hi^Htable[2].hi, Htable[3].lo  = V.lo^Htable[2].lo;
	V=Htable[4];
	Htable[5].hi  = V.hi^Htable[1].hi, Htable[5].lo  = V.lo^Htable[1].lo;
	Htable[6].hi  = V.hi^Htable[2].hi, Htable[6].lo  = V.lo^Htable[2].lo;
	Htable[7].hi  = V.hi^Htable[3].hi, Htable[7].lo  = V.lo^Htable[3].lo;
	V=Htable[8];
	Htable[9].hi  = V.hi^Htable[1].hi, Htable[9].lo  = V.lo^Htable[1].lo;
	Htable[10].hi = V.hi^Htable[2].hi, Htable[10].lo = V.lo^Htable[2].lo;
	Htable[11].hi = V.hi^Htable[3].hi, Htable[11].lo = V.lo^Htable[3].lo;
	Htable[12].hi = V.hi^Htable[4].hi, Htable[12].lo = V.lo^Htable[4].lo;
	Htable[13].hi = V.hi^Htable[5].hi, Htable[13].lo = V.lo^Htable[5].lo;
	Htable[14].hi = V.hi^Htable[6].hi, Htable[14].lo = V.lo^Htable[6].lo;
	Htable[15].hi = V.hi^Htable[7].hi, Htable[15].lo = V.lo^Htable[7].lo;
#endif
#if defined(GHASH_ASM) && (defined(__arm__) || defined(__arm))
	/*
	 * ARM assembler expects specific dword order in Htable.
	 */
	{
	int j;
	const union { long one; char little; } is_endian = {1};

	if (is_endian.little)
		for (j=0;j<16;++j) {
			V = Htable[j];
			Htable[j].hi = V.lo;
			Htable[j].lo = V.hi;
		}
	else
		for (j=0;j<16;++j) {
			V = Htable[j];
			Htable[j].hi = V.lo<<32|V.lo>>32;
			Htable[j].lo = V.hi<<32|V.hi>>32;
		}
	}
#endif
}

#ifndef GHASH_ASM
static const size_t rem_4bit[16] = {
	PACK(0x0000), PACK(0x1C20), PACK(0x3840), PACK(0x2460),
	PACK(0x7080), PACK(0x6CA0), PACK(0x48C0), PACK(0x54E0),
	PACK(0xE100), PACK(0xFD20), PACK(0xD940), PACK(0xC560),
	PACK(0x9180), PACK(0x8DA0), PACK(0xA9C0), PACK(0xB5E0) };

static void gcm_gmult_4bit(u64 Xi[2], const u128 Htable[16])
{
	u128 Z;
	int cnt = 15;
	size_t rem, nlo, nhi;
	const union { long one; char little; } is_endian = {1};

	nlo  = ((const u8 *)Xi)[15];
	nhi  = nlo>>4;
	nlo &= 0xf;

	Z.hi = Htable[nlo].hi;
	Z.lo = Htable[nlo].lo;

	while (1) {
		rem  = (size_t)Z.lo&0xf;
		Z.lo = (Z.hi<<60)|(Z.lo>>4);
		Z.hi = (Z.hi>>4);
		if (sizeof(size_t)==8)
			Z.hi ^= rem_4bit[rem];
		else
			Z.hi ^= (u64)rem_4bit[rem]<<32;

		Z.hi ^= Htable[nhi].hi;
		Z.lo ^= Htable[nhi].lo;

		if (--cnt<0)		break;

		nlo  = ((const u8 *)Xi)[cnt];
		nhi  = nlo>>4;
		nlo &= 0xf;

		rem  = (size_t)Z.lo&0xf;
		Z.lo = (Z.hi<<60)|(Z.lo>>4);
		Z.hi = (Z.hi>>4);
		if (sizeof(size_t)==8)
			Z.hi ^= rem_4bit[rem];
		else
			Z.hi ^= (u64)rem_4bit[rem]<<32;

		Z.hi ^= Htable[nlo].hi;
		Z.lo ^= Htable[nlo].lo;
	}

	if (is_endian.little) {
#ifdef BSWAP8
		Xi[0] = BSWAP8(Z.hi);
		Xi[1] = BSWAP8(Z.lo);
#else
		u8 *p = (u8 *)Xi;
		u32 v;
		v = (u32)(Z.hi>>32);	PUTU32(p,v);
		v = (u32)(Z.hi);	PUTU32(p+4,v);
		v = (u32)(Z.lo>>32);	PUTU32(p+8,v);
		v = (u32)(Z.lo);	PUTU32(p+12,v);
#endif
	}
	else {
		Xi[0] = Z.hi;
		Xi[1] = Z.lo;
	}
}

#if !defined(OPENSSL_SMALL_FOOTPRINT)
/*
 * Streamed gcm_mult_4bit, see CRYPTO_gcm128_[en|de]crypt for
 * details... Compiler-generated code doesn't seem to give any
 * performance improvement, at least not on x86[_64]. It's here
 * mostly as reference and a placeholder for possible future
 * non-trivial optimization[s]...
 */
static void gcm_ghash_4bit(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)
{
    u128 Z;
    int cnt;
    size_t rem, nlo, nhi;
    const union { long one; char little; } is_endian = {1};

#if 1
    do {
	cnt  = 15;
	nlo  = ((const u8 *)Xi)[15];
	nlo ^= inp[15];
	nhi  = nlo>>4;
	nlo &= 0xf;

	Z.hi = Htable[nlo].hi;
	Z.lo = Htable[nlo].lo;

	while (1) {
		rem  = (size_t)Z.lo&0xf;
		Z.lo = (Z.hi<<60)|(Z.lo>>4);
		Z.hi = (Z.hi>>4);
		if (sizeof(size_t)==8)
			Z.hi ^= rem_4bit[rem];
		else
			Z.hi ^= (u64)rem_4bit[rem]<<32;

		Z.hi ^= Htable[nhi].hi;
		Z.lo ^= Htable[nhi].lo;

		if (--cnt<0)		break;

		nlo  = ((const u8 *)Xi)[cnt];
		nlo ^= inp[cnt];
		nhi  = nlo>>4;
		nlo &= 0xf;

		rem  = (size_t)Z.lo&0xf;
		Z.lo = (Z.hi<<60)|(Z.lo>>4);
		Z.hi = (Z.hi>>4);
		if (sizeof(size_t)==8)
			Z.hi ^= rem_4bit[rem];
		else
			Z.hi ^= (u64)rem_4bit[rem]<<32;

		Z.hi ^= Htable[nlo].hi;
		Z.lo ^= Htable[nlo].lo;
	}
#else
    /*
     * Extra 256+16 bytes per-key plus 512 bytes shared tables
     * [should] give ~50% improvement... One could have PACK()-ed
     * the rem_8bit even here, but the priority is to minimize
     * cache footprint...
     */ 
    u128 Hshr4[16];	/* Htable shifted right by 4 bits */
    u8   Hshl4[16];	/* Htable shifted left  by 4 bits */
    static const unsigned short rem_8bit[256] = {
	0x0000, 0x01C2, 0x0384, 0x0246, 0x0708, 0x06CA, 0x048C, 0x054E,
	0x0E10, 0x0FD2, 0x0D94, 0x0C56, 0x0918, 0x08DA, 0x0A9C, 0x0B5E,
	0x1C20, 0x1DE2, 0x1FA4, 0x1E66, 0x1B28, 0x1AEA, 0x18AC, 0x196E,
	0x1230, 0x13F2, 0x11B4, 0x1076, 0x1538, 0x14FA, 0x16BC, 0x177E,
	0x3840, 0x3982, 0x3BC4, 0x3A06, 0x3F48, 0x3E8A, 0x3CCC, 0x3D0E,
	0x3650, 0x3792, 0x35D4, 0x3416, 0x3158, 0x309A, 0x32DC, 0x331E,
	0x2460, 0x25A2, 0x27E4, 0x2626, 0x2368, 0x22AA, 0x20EC, 0x212E,
	0x2A70, 0x2BB2, 0x29F4, 0x2836, 0x2D78, 0x2CBA, 0x2EFC, 0x2F3E,
	0x7080, 0x7142, 0x7304, 0x72C6, 0x7788, 0x764A, 0x740C, 0x75CE,
	0x7E90, 0x7F52, 0x7D14, 0x7CD6, 0x7998, 0x785A, 0x7A1C, 0x7BDE,
	0x6CA0, 0x6D62, 0x6F24, 0x6EE6, 0x6BA8, 0x6A6A, 0x682C, 0x69EE,
	0x62B0, 0x6372, 0x6134, 0x60F6, 0x65B8, 0x647A, 0x663C, 0x67FE,
	0x48C0, 0x4902, 0x4B44, 0x4A86, 0x4FC8, 0x4E0A, 0x4C4C, 0x4D8E,
	0x46D0, 0x4712, 0x4554, 0x4496, 0x41D8, 0x401A, 0x425C, 0x439E,
	0x54E0, 0x5522, 0x5764, 0x56A6, 0x53E8, 0x522A, 0x506C, 0x51AE,
	0x5AF0, 0x5B32, 0x5974, 0x58B6, 0x5DF8, 0x5C3A, 0x5E7C, 0x5FBE,
	0xE100, 0xE0C2, 0xE284, 0xE346, 0xE608, 0xE7CA, 0xE58C, 0xE44E,
	0xEF10, 0xEED2, 0xEC94, 0xED56, 0xE818, 0xE9DA, 0xEB9C, 0xEA5E,
	0xFD20, 0xFCE2, 0xFEA4, 0xFF66, 0xFA28, 0xFBEA, 0xF9AC, 0xF86E,
	0xF330, 0xF2F2, 0xF0B4, 0xF176, 0xF438, 0xF5FA, 0xF7BC, 0xF67E,
	0xD940, 0xD882, 0xDAC4, 0xDB06, 0xDE48, 0xDF8A, 0xDDCC, 0xDC0E,
	0xD750, 0xD692, 0xD4D4, 0xD516, 0xD058, 0xD19A, 0xD3DC, 0xD21E,
	0xC560, 0xC4A2, 0xC6E4, 0xC726, 0xC268, 0xC3AA, 0xC1EC, 0xC02E,
	0xCB70, 0xCAB2, 0xC8F4, 0xC936, 0xCC78, 0xCDBA, 0xCFFC, 0xCE3E,
	0x9180, 0x9042, 0x9204, 0x93C6, 0x9688, 0x974A, 0x950C, 0x94CE,
	0x9F90, 0x9E52, 0x9C14, 0x9DD6, 0x9898, 0x995A, 0x9B1C, 0x9ADE,
	0x8DA0, 0x8C62, 0x8E24, 0x8FE6, 0x8AA8, 0x8B6A, 0x892C, 0x88EE,
	0x83B0, 0x8272, 0x8034, 0x81F6, 0x84B8, 0x857A, 0x873C, 0x86FE,
	0xA9C0, 0xA802, 0xAA44, 0xAB86, 0xAEC8, 0xAF0A, 0xAD4C, 0xAC8E,
	0xA7D0, 0xA612, 0xA454, 0xA596, 0xA0D8, 0xA11A, 0xA35C, 0xA29E,
	0xB5E0, 0xB422, 0xB664, 0xB7A6, 0xB2E8, 0xB32A, 0xB16C, 0xB0AE,
	0xBBF0, 0xBA32, 0xB874, 0xB9B6, 0xBCF8, 0xBD3A, 0xBF7C, 0xBEBE };
    /*
     * This pre-processing phase slows down procedure by approximately
     * same time as it makes each loop spin faster. In other words
     * single block performance is approximately same as straightforward
     * "4-bit" implementation, and then it goes only faster...
     */
    for (cnt=0; cnt<16; ++cnt) {
	Z.hi = Htable[cnt].hi;
	Z.lo = Htable[cnt].lo;
	Hshr4[cnt].lo = (Z.hi<<60)|(Z.lo>>4);
	Hshr4[cnt].hi = (Z.hi>>4);
	Hshl4[cnt]    = (u8)(Z.lo<<4);
    }

    do {
	for (Z.lo=0, Z.hi=0, cnt=15; cnt; --cnt) {
		nlo  = ((const u8 *)Xi)[cnt];
		nlo ^= inp[cnt];
		nhi  = nlo>>4;
		nlo &= 0xf;

		Z.hi ^= Htable[nlo].hi;
		Z.lo ^= Htable[nlo].lo;

		rem = (size_t)Z.lo&0xff;

		Z.lo = (Z.hi<<56)|(Z.lo>>8);
		Z.hi = (Z.hi>>8);

		Z.hi ^= Hshr4[nhi].hi;
		Z.lo ^= Hshr4[nhi].lo;
		Z.hi ^= (u64)rem_8bit[rem^Hshl4[nhi]]<<48;
	}

	nlo  = ((const u8 *)Xi)[0];
	nlo ^= inp[0];
	nhi  = nlo>>4;
	nlo &= 0xf;

	Z.hi ^= Htable[nlo].hi;
	Z.lo ^= Htable[nlo].lo;

	rem = (size_t)Z.lo&0xf;

	Z.lo = (Z.hi<<60)|(Z.lo>>4);
	Z.hi = (Z.hi>>4);

	Z.hi ^= Htable[nhi].hi;
	Z.lo ^= Htable[nhi].lo;
	Z.hi ^= ((u64)rem_8bit[rem<<4])<<48;
#endif

	if (is_endian.little) {
#ifdef BSWAP8
		Xi[0] = BSWAP8(Z.hi);
		Xi[1] = BSWAP8(Z.lo);
#else
		u8 *p = (u8 *)Xi;
		u32 v;
		v = (u32)(Z.hi>>32);	PUTU32(p,v);
		v = (u32)(Z.hi);	PUTU32(p+4,v);
		v = (u32)(Z.lo>>32);	PUTU32(p+8,v);
		v = (u32)(Z.lo);	PUTU32(p+12,v);
#endif
	}
	else {
		Xi[0] = Z.hi;
		Xi[1] = Z.lo;
	}
    } while (inp+=16, len-=16);
}
#endif
#else
void gcm_gmult_4bit(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_4bit(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
#endif

#define GCM_MUL(ctx,Xi)   gcm_gmult_4bit(ctx->Xi.u,ctx->Htable)
#if defined(GHASH_ASM) || !defined(OPENSSL_SMALL_FOOTPRINT)
#define GHASH(ctx,in,len) gcm_ghash_4bit((ctx)->Xi.u,(ctx)->Htable,in,len)
/* GHASH_CHUNK is "stride parameter" missioned to mitigate cache
 * trashing effect. In other words idea is to hash data while it's
 * still in L1 cache after encryption pass... */
#define GHASH_CHUNK       (3*1024)
#endif

#else	/* TABLE_BITS */

static void gcm_gmult_1bit(u64 Xi[2],const u64 H[2])
{
	u128 V,Z = { 0,0 };
	long X;
	int  i,j;
	const long *xi = (const long *)Xi;
	const union { long one; char little; } is_endian = {1};

	V.hi = H[0];	/* H is in host byte order, no byte swapping */
	V.lo = H[1];

	for (j=0; j<16/sizeof(long); ++j) {
		if (is_endian.little) {
			if (sizeof(long)==8) {
#ifdef BSWAP8
				X = (long)(BSWAP8(xi[j]));
#else
				const u8 *p = (const u8 *)(xi+j);
				X = (long)((u64)GETU32(p)<<32|GETU32(p+4));
#endif
			}
			else {
				const u8 *p = (const u8 *)(xi+j);
				X = (long)GETU32(p);
			}
		}
		else
			X = xi[j];

		for (i=0; i<8*sizeof(long); ++i, X<<=1) {
			u64 M = (u64)(X>>(8*sizeof(long)-1));
			Z.hi ^= V.hi&M;
			Z.lo ^= V.lo&M;

			REDUCE1BIT(V);
		}
	}

	if (is_endian.little) {
#ifdef BSWAP8
		Xi[0] = BSWAP8(Z.hi);
		Xi[1] = BSWAP8(Z.lo);
#else
		u8 *p = (u8 *)Xi;
		u32 v;
		v = (u32)(Z.hi>>32);	PUTU32(p,v);
		v = (u32)(Z.hi);	PUTU32(p+4,v);
		v = (u32)(Z.lo>>32);	PUTU32(p+8,v);
		v = (u32)(Z.lo);	PUTU32(p+12,v);
#endif
	}
	else {
		Xi[0] = Z.hi;
		Xi[1] = Z.lo;
	}
}
#define GCM_MUL(ctx,Xi)	  gcm_gmult_1bit(ctx->Xi.u,ctx->H.u)

#endif

#if	TABLE_BITS==4 && (defined(GHASH_ASM) || defined(OPENSSL_CPUID_OBJ))
# if	!defined(I386_ONLY) && \
	(defined(__i386)	|| defined(__i386__)	|| \
	 defined(__x86_64)	|| defined(__x86_64__)	|| \
	 defined(_M_IX86)	|| defined(_M_AMD64)	|| defined(_M_X64))
#  define GHASH_ASM_X86_OR_64
#  define GCM_FUNCREF_4BIT
extern unsigned int OPENSSL_ia32cap_P[2];

void gcm_init_clmul(u128 Htable[16],const u64 Xi[2]);
void gcm_gmult_clmul(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_clmul(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);

#  if	defined(__i386) || defined(__i386__) || defined(_M_IX86)
#   define GHASH_ASM_X86
void gcm_gmult_4bit_mmx(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_4bit_mmx(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);

void gcm_gmult_4bit_x86(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_4bit_x86(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
#  endif
# elif defined(__arm__) || defined(__arm) || defined(__aarch64__)
#  include "arm_arch.h"
#  if __ARM_ARCH__>=7
#   define GHASH_ASM_ARM
#   define GCM_FUNCREF_4BIT
#   define PMULL_CAPABLE	(OPENSSL_armcap_P & ARMV8_PMULL)
#   if defined(__arm__) || defined(__arm)
#    define NEON_CAPABLE	(OPENSSL_armcap_P & ARMV7_NEON)
#   endif
void gcm_init_neon(u128 Htable[16],const u64 Xi[2]);
void gcm_gmult_neon(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_neon(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
void gcm_init_v8(u128 Htable[16],const u64 Xi[2]);
void gcm_gmult_v8(u64 Xi[2],const u128 Htable[16]);
void gcm_ghash_v8(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
#  endif
# endif
#endif

#ifdef GCM_FUNCREF_4BIT
# undef  GCM_MUL
# define GCM_MUL(ctx,Xi)	(*gcm_gmult_p)(ctx->Xi.u,ctx->Htable)
# ifdef GHASH
#  undef  GHASH
#  define GHASH(ctx,in,len)	(*gcm_ghash_p)(ctx->Xi.u,ctx->Htable,in,len)
# endif
#endif

void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx,void *key,block128_f block)
{
	const union { long one; char little; } is_endian = {1};

	memset(ctx,0,sizeof(*ctx));
	ctx->block = block;
	ctx->key   = key;

	(*block)(ctx->H.c,ctx->H.c,key);

	if (is_endian.little) {
		/* H is stored in host byte order */
#ifdef BSWAP8
		ctx->H.u[0] = BSWAP8(ctx->H.u[0]);
		ctx->H.u[1] = BSWAP8(ctx->H.u[1]);
#else
		u8 *p = ctx->H.c;
		u64 hi,lo;
		hi = (u64)GETU32(p)  <<32|GETU32(p+4);
		lo = (u64)GETU32(p+8)<<32|GETU32(p+12);
		ctx->H.u[0] = hi;
		ctx->H.u[1] = lo;
#endif
	}

#if	TABLE_BITS==8
	gcm_init_8bit(ctx->Htable,ctx->H.u);
#elif	TABLE_BITS==4
# if	defined(GHASH_ASM_X86_OR_64)
#  if	!defined(GHASH_ASM_X86) || defined(OPENSSL_IA32_SSE2)
	if (OPENSSL_ia32cap_P[0]&(1<<24) &&	/* check FXSR bit */
	    OPENSSL_ia32cap_P[1]&(1<<1) ) {	/* check PCLMULQDQ bit */
		gcm_init_clmul(ctx->Htable,ctx->H.u);
		ctx->gmult = gcm_gmult_clmul;
		ctx->ghash = gcm_ghash_clmul;
		return;
	}
#  endif
	gcm_init_4bit(ctx->Htable,ctx->H.u);
#  if	defined(GHASH_ASM_X86)			/* x86 only */
#   if	defined(OPENSSL_IA32_SSE2)
	if (OPENSSL_ia32cap_P[0]&(1<<25)) {	/* check SSE bit */
#   else
	if (OPENSSL_ia32cap_P[0]&(1<<23)) {	/* check MMX bit */
#   endif
		ctx->gmult = gcm_gmult_4bit_mmx;
		ctx->ghash = gcm_ghash_4bit_mmx;
	} else {
		ctx->gmult = gcm_gmult_4bit_x86;
		ctx->ghash = gcm_ghash_4bit_x86;
	}
#  else
	ctx->gmult = gcm_gmult_4bit;
	ctx->ghash = gcm_ghash_4bit;
#  endif
# elif	defined(GHASH_ASM_ARM)
#  ifdef PMULL_CAPABLE
	if (PMULL_CAPABLE) {
		gcm_init_v8(ctx->Htable,ctx->H.u);
		ctx->gmult = gcm_gmult_v8;
		ctx->ghash = gcm_ghash_v8;
	} else
#  endif
#  ifdef NEON_CAPABLE
	if (NEON_CAPABLE) {
		gcm_init_neon(ctx->Htable,ctx->H.u);
		ctx->gmult = gcm_gmult_neon;
		ctx->ghash = gcm_ghash_neon;
	} else
#  endif
	{
		gcm_init_4bit(ctx->Htable,ctx->H.u);
		ctx->gmult = gcm_gmult_4bit;
		ctx->ghash = gcm_ghash_4bit;
	}
# else
	gcm_init_4bit(ctx->Htable,ctx->H.u);
# endif
#endif
}

void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx,const unsigned char *iv,size_t len)
{
	const union { long one; char little; } is_endian = {1};
	unsigned int ctr;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
#endif

	ctx->Yi.u[0]  = 0;
	ctx->Yi.u[1]  = 0;
	ctx->Xi.u[0]  = 0;
	ctx->Xi.u[1]  = 0;
	ctx->len.u[0] = 0;	/* AAD length */
	ctx->len.u[1] = 0;	/* message length */
	ctx->ares = 0;
	ctx->mres = 0;

	if (len==12) {
		memcpy(ctx->Yi.c,iv,12);
		ctx->Yi.c[15]=1;
		ctr=1;
	}
	else {
		size_t i;
		u64 len0 = len;

		while (len>=16) {
			for (i=0; i<16; ++i) ctx->Yi.c[i] ^= iv[i];
			GCM_MUL(ctx,Yi);
			iv += 16;
			len -= 16;
		}
		if (len) {
			for (i=0; i<len; ++i) ctx->Yi.c[i] ^= iv[i];
			GCM_MUL(ctx,Yi);
		}
		len0 <<= 3;
		if (is_endian.little) {
#ifdef BSWAP8
			ctx->Yi.u[1]  ^= BSWAP8(len0);
#else
			ctx->Yi.c[8]  ^= (u8)(len0>>56);
			ctx->Yi.c[9]  ^= (u8)(len0>>48);
			ctx->Yi.c[10] ^= (u8)(len0>>40);
			ctx->Yi.c[11] ^= (u8)(len0>>32);
			ctx->Yi.c[12] ^= (u8)(len0>>24);
			ctx->Yi.c[13] ^= (u8)(len0>>16);
			ctx->Yi.c[14] ^= (u8)(len0>>8);
			ctx->Yi.c[15] ^= (u8)(len0);
#endif
		}
		else
			ctx->Yi.u[1]  ^= len0;

		GCM_MUL(ctx,Yi);

		if (is_endian.little)
#ifdef BSWAP4
			ctr = BSWAP4(ctx->Yi.d[3]);
#else
			ctr = GETU32(ctx->Yi.c+12);
#endif
		else
			ctr = ctx->Yi.d[3];
	}

	(*ctx->block)(ctx->Yi.c,ctx->EK0.c,ctx->key);
	++ctr;
	if (is_endian.little)
#ifdef BSWAP4
		ctx->Yi.d[3] = BSWAP4(ctr);
#else
		PUTU32(ctx->Yi.c+12,ctr);
#endif
	else
		ctx->Yi.d[3] = ctr;
}

int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx,const unsigned char *aad,size_t len)
{
	size_t i;
	unsigned int n;
	u64 alen = ctx->len.u[0];
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
# ifdef GHASH
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx->ghash;
# endif
#endif

	if (ctx->len.u[1]) return -2;

	alen += len;
	if (alen>(U64(1)<<61) || (sizeof(len)==8 && alen<len))
		return -1;
	ctx->len.u[0] = alen;

	n = ctx->ares;
	if (n) {
		while (n && len) {
			ctx->Xi.c[n] ^= *(aad++);
			--len;
			n = (n+1)%16;
		}
		if (n==0) GCM_MUL(ctx,Xi);
		else {
			ctx->ares = n;
			return 0;
		}
	}

#ifdef GHASH
	if ((i = (len&(size_t)-16))) {
		GHASH(ctx,aad,i);
		aad += i;
		len -= i;
	}
#else
	while (len>=16) {
		for (i=0; i<16; ++i) ctx->Xi.c[i] ^= aad[i];
		GCM_MUL(ctx,Xi);
		aad += 16;
		len -= 16;
	}
#endif
	if (len) {
		n = (unsigned int)len;
		for (i=0; i<len; ++i) ctx->Xi.c[i] ^= aad[i];
	}

	ctx->ares = n;
	return 0;
}

int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
		const unsigned char *in, unsigned char *out,
		size_t len)
{
	const union { long one; char little; } is_endian = {1};
	unsigned int n, ctr;
	size_t i;
	u64        mlen  = ctx->len.u[1];
	block128_f block = ctx->block;
	void      *key   = ctx->key;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
# ifdef GHASH
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx->ghash;
# endif
#endif

#if 0
	n = (unsigned int)mlen%16; /* alternative to ctx->mres */
#endif
	mlen += len;
	if (mlen>((U64(1)<<36)-32) || (sizeof(len)==8 && mlen<len))
		return -1;
	ctx->len.u[1] = mlen;

	if (ctx->ares) {
		/* First call to encrypt finalizes GHASH(AAD) */
		GCM_MUL(ctx,Xi);
		ctx->ares = 0;
	}

	if (is_endian.little)
#ifdef BSWAP4
		ctr = BSWAP4(ctx->Yi.d[3]);
#else
		ctr = GETU32(ctx->Yi.c+12);
#endif
	else
		ctr = ctx->Yi.d[3];

	n = ctx->mres;
#if !defined(OPENSSL_SMALL_FOOTPRINT)
	if (16%sizeof(size_t) == 0) do {	/* always true actually */
		if (n) {
			while (n && len) {
				ctx->Xi.c[n] ^= *(out++) = *(in++)^ctx->EKi.c[n];
				--len;
				n = (n+1)%16;
			}
			if (n==0) GCM_MUL(ctx,Xi);
			else {
				ctx->mres = n;
				return 0;
			}
		}
#if defined(STRICT_ALIGNMENT)
		if (((size_t)in|(size_t)out)%sizeof(size_t) != 0)
			break;
#endif
#if defined(GHASH) && defined(GHASH_CHUNK)
		while (len>=GHASH_CHUNK) {
		    size_t j=GHASH_CHUNK;

		    while (j) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i)
				out_t[i] = in_t[i] ^ ctx->EKi.t[i];
			out += 16;
			in  += 16;
			j   -= 16;
		    }
		    GHASH(ctx,out-GHASH_CHUNK,GHASH_CHUNK);
		    len -= GHASH_CHUNK;
		}
		if ((i = (len&(size_t)-16))) {
		    size_t j=i;

		    while (len>=16) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i)
				out_t[i] = in_t[i] ^ ctx->EKi.t[i];
			out += 16;
			in  += 16;
			len -= 16;
		    }
		    GHASH(ctx,out-j,j);
		}
#else
		while (len>=16) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i)
				ctx->Xi.t[i] ^=
				out_t[i] = in_t[i]^ctx->EKi.t[i];
			GCM_MUL(ctx,Xi);
			out += 16;
			in  += 16;
			len -= 16;
		}
#endif
		if (len) {
			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			while (len--) {
				ctx->Xi.c[n] ^= out[n] = in[n]^ctx->EKi.c[n];
				++n;
			}
		}

		ctx->mres = n;
		return 0;
	} while(0);
#endif
	for (i=0;i<len;++i) {
		if (n==0) {
			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
		}
		ctx->Xi.c[n] ^= out[i] = in[i]^ctx->EKi.c[n];
		n = (n+1)%16;
		if (n==0)
			GCM_MUL(ctx,Xi);
	}

	ctx->mres = n;
	return 0;
}

int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
		const unsigned char *in, unsigned char *out,
		size_t len)
{
	const union { long one; char little; } is_endian = {1};
	unsigned int n, ctr;
	size_t i;
	u64        mlen  = ctx->len.u[1];
	block128_f block = ctx->block;
	void      *key   = ctx->key;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
# ifdef GHASH
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx->ghash;
# endif
#endif

	mlen += len;
	if (mlen>((U64(1)<<36)-32) || (sizeof(len)==8 && mlen<len))
		return -1;
	ctx->len.u[1] = mlen;

	if (ctx->ares) {
		/* First call to decrypt finalizes GHASH(AAD) */
		GCM_MUL(ctx,Xi);
		ctx->ares = 0;
	}

	if (is_endian.little)
#ifdef BSWAP4
		ctr = BSWAP4(ctx->Yi.d[3]);
#else
		ctr = GETU32(ctx->Yi.c+12);
#endif
	else
		ctr = ctx->Yi.d[3];

	n = ctx->mres;
#if !defined(OPENSSL_SMALL_FOOTPRINT)
	if (16%sizeof(size_t) == 0) do {	/* always true actually */
		if (n) {
			while (n && len) {
				u8 c = *(in++);
				*(out++) = c^ctx->EKi.c[n];
				ctx->Xi.c[n] ^= c;
				--len;
				n = (n+1)%16;
			}
			if (n==0) GCM_MUL (ctx,Xi);
			else {
				ctx->mres = n;
				return 0;
			}
		}
#if defined(STRICT_ALIGNMENT)
		if (((size_t)in|(size_t)out)%sizeof(size_t) != 0)
			break;
#endif
#if defined(GHASH) && defined(GHASH_CHUNK)
		while (len>=GHASH_CHUNK) {
		    size_t j=GHASH_CHUNK;

		    GHASH(ctx,in,GHASH_CHUNK);
		    while (j) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i)
				out_t[i] = in_t[i]^ctx->EKi.t[i];
			out += 16;
			in  += 16;
			j   -= 16;
		    }
		    len -= GHASH_CHUNK;
		}
		if ((i = (len&(size_t)-16))) {
		    GHASH(ctx,in,i);
		    while (len>=16) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i)
				out_t[i] = in_t[i]^ctx->EKi.t[i];
			out += 16;
			in  += 16;
			len -= 16;
		    }
		}
#else
		while (len>=16) {
		    	size_t *out_t=(size_t *)out;
		    	const size_t *in_t=(const size_t *)in;

			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			for (i=0; i<16/sizeof(size_t); ++i) {
				size_t c = in[i];
				out[i] = c^ctx->EKi.t[i];
				ctx->Xi.t[i] ^= c;
			}
			GCM_MUL(ctx,Xi);
			out += 16;
			in  += 16;
			len -= 16;
		}
#endif
		if (len) {
			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
			while (len--) {
				u8 c = in[n];
				ctx->Xi.c[n] ^= c;
				out[n] = c^ctx->EKi.c[n];
				++n;
			}
		}

		ctx->mres = n;
		return 0;
	} while(0);
#endif
	for (i=0;i<len;++i) {
		u8 c;
		if (n==0) {
			(*block)(ctx->Yi.c,ctx->EKi.c,key);
			++ctr;
			if (is_endian.little)
#ifdef BSWAP4
				ctx->Yi.d[3] = BSWAP4(ctr);
#else
				PUTU32(ctx->Yi.c+12,ctr);
#endif
			else
				ctx->Yi.d[3] = ctr;
		}
		c = in[i];
		out[i] = c^ctx->EKi.c[n];
		ctx->Xi.c[n] ^= c;
		n = (n+1)%16;
		if (n==0)
			GCM_MUL(ctx,Xi);
	}

	ctx->mres = n;
	return 0;
}

int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
		const unsigned char *in, unsigned char *out,
		size_t len, ctr128_f stream)
{
	const union { long one; char little; } is_endian = {1};
	unsigned int n, ctr;
	size_t i;
	u64   mlen = ctx->len.u[1];
	void *key  = ctx->key;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
# ifdef GHASH
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx->ghash;
# endif
#endif

	mlen += len;
	if (mlen>((U64(1)<<36)-32) || (sizeof(len)==8 && mlen<len))
		return -1;
	ctx->len.u[1] = mlen;

	if (ctx->ares) {
		/* First call to encrypt finalizes GHASH(AAD) */
		GCM_MUL(ctx,Xi);
		ctx->ares = 0;
	}

	if (is_endian.little)
#ifdef BSWAP4
		ctr = BSWAP4(ctx->Yi.d[3]);
#else
		ctr = GETU32(ctx->Yi.c+12);
#endif
	else
		ctr = ctx->Yi.d[3];

	n = ctx->mres;
	if (n) {
		while (n && len) {
			ctx->Xi.c[n] ^= *(out++) = *(in++)^ctx->EKi.c[n];
			--len;
			n = (n+1)%16;
		}
		if (n==0) GCM_MUL(ctx,Xi);
		else {
			ctx->mres = n;
			return 0;
		}
	}
#if defined(GHASH) && !defined(OPENSSL_SMALL_FOOTPRINT)
	while (len>=GHASH_CHUNK) {
		(*stream)(in,out,GHASH_CHUNK/16,key,ctx->Yi.c);
		ctr += GHASH_CHUNK/16;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		GHASH(ctx,out,GHASH_CHUNK);
		out += GHASH_CHUNK;
		in  += GHASH_CHUNK;
		len -= GHASH_CHUNK;
	}
#endif
	if ((i = (len&(size_t)-16))) {
		size_t j=i/16;

		(*stream)(in,out,j,key,ctx->Yi.c);
		ctr += (unsigned int)j;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		in  += i;
		len -= i;
#if defined(GHASH)
		GHASH(ctx,out,i);
		out += i;
#else
		while (j--) {
			for (i=0;i<16;++i) ctx->Xi.c[i] ^= out[i];
			GCM_MUL(ctx,Xi);
			out += 16;
		}
#endif
	}
	if (len) {
		(*ctx->block)(ctx->Yi.c,ctx->EKi.c,key);
		++ctr;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		while (len--) {
			ctx->Xi.c[n] ^= out[n] = in[n]^ctx->EKi.c[n];
			++n;
		}
	}

	ctx->mres = n;
	return 0;
}

int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
		const unsigned char *in, unsigned char *out,
		size_t len,ctr128_f stream)
{
	const union { long one; char little; } is_endian = {1};
	unsigned int n, ctr;
	size_t i;
	u64   mlen = ctx->len.u[1];
	void *key  = ctx->key;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
# ifdef GHASH
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx->ghash;
# endif
#endif

	mlen += len;
	if (mlen>((U64(1)<<36)-32) || (sizeof(len)==8 && mlen<len))
		return -1;
	ctx->len.u[1] = mlen;

	if (ctx->ares) {
		/* First call to decrypt finalizes GHASH(AAD) */
		GCM_MUL(ctx,Xi);
		ctx->ares = 0;
	}

	if (is_endian.little)
#ifdef BSWAP4
		ctr = BSWAP4(ctx->Yi.d[3]);
#else
		ctr = GETU32(ctx->Yi.c+12);
#endif
	else
		ctr = ctx->Yi.d[3];

	n = ctx->mres;
	if (n) {
		while (n && len) {
			u8 c = *(in++);
			*(out++) = c^ctx->EKi.c[n];
			ctx->Xi.c[n] ^= c;
			--len;
			n = (n+1)%16;
		}
		if (n==0) GCM_MUL (ctx,Xi);
		else {
			ctx->mres = n;
			return 0;
		}
	}
#if defined(GHASH) && !defined(OPENSSL_SMALL_FOOTPRINT)
	while (len>=GHASH_CHUNK) {
		GHASH(ctx,in,GHASH_CHUNK);
		(*stream)(in,out,GHASH_CHUNK/16,key,ctx->Yi.c);
		ctr += GHASH_CHUNK/16;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		out += GHASH_CHUNK;
		in  += GHASH_CHUNK;
		len -= GHASH_CHUNK;
	}
#endif
	if ((i = (len&(size_t)-16))) {
		size_t j=i/16;

#if defined(GHASH)
		GHASH(ctx,in,i);
#else
		while (j--) {
			size_t k;
			for (k=0;k<16;++k) ctx->Xi.c[k] ^= in[k];
			GCM_MUL(ctx,Xi);
			in += 16;
		}
		j   = i/16;
		in -= i;
#endif
		(*stream)(in,out,j,key,ctx->Yi.c);
		ctr += (unsigned int)j;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		out += i;
		in  += i;
		len -= i;
	}
	if (len) {
		(*ctx->block)(ctx->Yi.c,ctx->EKi.c,key);
		++ctr;
		if (is_endian.little)
#ifdef BSWAP4
			ctx->Yi.d[3] = BSWAP4(ctr);
#else
			PUTU32(ctx->Yi.c+12,ctr);
#endif
		else
			ctx->Yi.d[3] = ctr;
		while (len--) {
			u8 c = in[n];
			ctx->Xi.c[n] ^= c;
			out[n] = c^ctx->EKi.c[n];
			++n;
		}
	}

	ctx->mres = n;
	return 0;
}

int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx,const unsigned char *tag,
			size_t len)
{
	const union { long one; char little; } is_endian = {1};
	u64 alen = ctx->len.u[0]<<3;
	u64 clen = ctx->len.u[1]<<3;
#ifdef GCM_FUNCREF_4BIT
	void (*gcm_gmult_p)(u64 Xi[2],const u128 Htable[16])	= ctx->gmult;
#endif

	if (ctx->mres || ctx->ares)
		GCM_MUL(ctx,Xi);

	if (is_endian.little) {
#ifdef BSWAP8
		alen = BSWAP8(alen);
		clen = BSWAP8(clen);
#else
		u8 *p = ctx->len.c;

		ctx->len.u[0] = alen;
		ctx->len.u[1] = clen;

		alen = (u64)GETU32(p)  <<32|GETU32(p+4);
		clen = (u64)GETU32(p+8)<<32|GETU32(p+12);
#endif
	}

	ctx->Xi.u[0] ^= alen;
	ctx->Xi.u[1] ^= clen;
	GCM_MUL(ctx,Xi);

	ctx->Xi.u[0] ^= ctx->EK0.u[0];
	ctx->Xi.u[1] ^= ctx->EK0.u[1];

	if (tag && len<=sizeof(ctx->Xi))
		return memcmp(ctx->Xi.c,tag,len);
	else
		return -1;
}

void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, unsigned char *tag, size_t len)
{
	CRYPTO_gcm128_finish(ctx, NULL, 0);
	memcpy(tag, ctx->Xi.c, len<=sizeof(ctx->Xi.c)?len:sizeof(ctx->Xi.c));
}

GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block)
{
	GCM128_CONTEXT *ret;

	if ((ret = (GCM128_CONTEXT *)OPENSSL_malloc(sizeof(GCM128_CONTEXT))))
		CRYPTO_gcm128_init(ret,key,block);

	return ret;
}

void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx)
{
	if (ctx) {
		OPENSSL_cleanse(ctx,sizeof(*ctx));
		OPENSSL_free(ctx);
	}
}

#if defined(SELFTEST)
#include <stdio.h>
#include <openssl/aes.h>

/* Test Case 1 */
static const u8	K1[16],
		*P1=NULL,
		*A1=NULL,
		IV1[12],
		*C1=NULL,
		T1[]=  {0x58,0xe2,0xfc,0xce,0xfa,0x7e,0x30,0x61,0x36,0x7f,0x1d,0x57,0xa4,0xe7,0x45,0x5a};

/* Test Case 2 */
#define K2 K1
#define A2 A1
#define IV2 IV1
static const u8	P2[16],
		C2[]=  {0x03,0x88,0xda,0xce,0x60,0xb6,0xa3,0x92,0xf3,0x28,0xc2,0xb9,0x71,0xb2,0xfe,0x78},
		T2[]=  {0xab,0x6e,0x47,0xd4,0x2c,0xec,0x13,0xbd,0xf5,0x3a,0x67,0xb2,0x12,0x57,0xbd,0xdf};

/* Test Case 3 */
#define A3 A2
static const u8	K3[]=  {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08},
		P3[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
		IV3[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
		C3[]=  {0x42,0x83,0x1e,0xc2,0x21,0x77,0x74,0x24,0x4b,0x72,0x21,0xb7,0x84,0xd0,0xd4,0x9c,
			0xe3,0xaa,0x21,0x2f,0x2c,0x02,0xa4,0xe0,0x35,0xc1,0x7e,0x23,0x29,0xac,0xa1,0x2e,
			0x21,0xd5,0x14,0xb2,0x54,0x66,0x93,0x1c,0x7d,0x8f,0x6a,0x5a,0xac,0x84,0xaa,0x05,
			0x1b,0xa3,0x0b,0x39,0x6a,0x0a,0xac,0x97,0x3d,0x58,0xe0,0x91,0x47,0x3f,0x59,0x85},
		T3[]=  {0x4d,0x5c,0x2a,0xf3,0x27,0xcd,0x64,0xa6,0x2c,0xf3,0x5a,0xbd,0x2b,0xa6,0xfa,0xb4};

/* Test Case 4 */
#define K4 K3
#define IV4 IV3
static const u8	P4[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
		A4[]=  {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
			0xab,0xad,0xda,0xd2},
		C4[]=  {0x42,0x83,0x1e,0xc2,0x21,0x77,0x74,0x24,0x4b,0x72,0x21,0xb7,0x84,0xd0,0xd4,0x9c,
			0xe3,0xaa,0x21,0x2f,0x2c,0x02,0xa4,0xe0,0x35,0xc1,0x7e,0x23,0x29,0xac,0xa1,0x2e,
			0x21,0xd5,0x14,0xb2,0x54,0x66,0x93,0x1c,0x7d,0x8f,0x6a,0x5a,0xac,0x84,0xaa,0x05,
			0x1b,0xa3,0x0b,0x39,0x6a,0x0a,0xac,0x97,0x3d,0x58,0xe0,0x91},
		T4[]=  {0x5b,0xc9,0x4f,0xbc,0x32,0x21,0xa5,0xdb,0x94,0xfa,0xe9,0x5a,0xe7,0x12,0x1a,0x47};

/* Test Case 5 */
#define K5 K4
#define P5 P4
#define A5 A4
static const u8	IV5[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
		C5[]=  {0x61,0x35,0x3b,0x4c,0x28,0x06,0x93,0x4a,0x77,0x7f,0xf5,0x1f,0xa2,0x2a,0x47,0x55,
			0x69,0x9b,0x2a,0x71,0x4f,0xcd,0xc6,0xf8,0x37,0x66,0xe5,0xf9,0x7b,0x6c,0x74,0x23,
			0x73,0x80,0x69,0x00,0xe4,0x9f,0x24,0xb2,0x2b,0x09,0x75,0x44,0xd4,0x89,0x6b,0x42,
			0x49,0x89,0xb5,0xe1,0xeb,0xac,0x0f,0x07,0xc2,0x3f,0x45,0x98},
		T5[]=  {0x36,0x12,0xd2,0xe7,0x9e,0x3b,0x07,0x85,0x56,0x1b,0xe1,0x4a,0xac,0xa2,0xfc,0xcb};

/* Test Case 6 */
#define K6 K5
#define P6 P5
#define A6 A5
static const u8	IV6[]= {0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
			0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
			0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
			0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
		C6[]=  {0x8c,0xe2,0x49,0x98,0x62,0x56,0x15,0xb6,0x03,0xa0,0x33,0xac,0xa1,0x3f,0xb8,0x94,
			0xbe,0x91,0x12,0xa5,0xc3,0xa2,0x11,0xa8,0xba,0x26,0x2a,0x3c,0xca,0x7e,0x2c,0xa7,
			0x01,0xe4,0xa9,0xa4,0xfb,0xa4,0x3c,0x90,0xcc,0xdc,0xb2,0x81,0xd4,0x8c,0x7c,0x6f,
			0xd6,0x28,0x75,0xd2,0xac,0xa4,0x17,0x03,0x4c,0x34,0xae,0xe5},
		T6[]=  {0x61,0x9c,0xc5,0xae,0xff,0xfe,0x0b,0xfa,0x46,0x2a,0xf4,0x3c,0x16,0x99,0xd0,0x50};

/* Test Case 7 */
static const u8 K7[24],
		*P7=NULL,
		*A7=NULL,
		IV7[12],
		*C7=NULL,
		T7[]=  {0xcd,0x33,0xb2,0x8a,0xc7,0x73,0xf7,0x4b,0xa0,0x0e,0xd1,0xf3,0x12,0x57,0x24,0x35};

/* Test Case 8 */
#define K8 K7
#define IV8 IV7
#define A8 A7
static const u8	P8[16],
		C8[]=  {0x98,0xe7,0x24,0x7c,0x07,0xf0,0xfe,0x41,0x1c,0x26,0x7e,0x43,0x84,0xb0,0xf6,0x00},
		T8[]=  {0x2f,0xf5,0x8d,0x80,0x03,0x39,0x27,0xab,0x8e,0xf4,0xd4,0x58,0x75,0x14,0xf0,0xfb};

/* Test Case 9 */
#define A9 A8
static const u8	K9[]=  {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08,
			0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c},
		P9[]=  {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
		IV9[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
		C9[]=  {0x39,0x80,0xca,0x0b,0x3c,0x00,0xe8,0x41,0xeb,0x06,0xfa,0xc4,0x87,0x2a,0x27,0x57,
			0x85,0x9e,0x1c,0xea,0xa6,0xef,0xd9,0x84,0x62,0x85,0x93,0xb4,0x0c,0xa1,0xe1,0x9c,
			0x7d,0x77,0x3d,0x00,0xc1,0x44,0xc5,0x25,0xac,0x61,0x9d,0x18,0xc8,0x4a,0x3f,0x47,
			0x18,0xe2,0x44,0x8b,0x2f,0xe3,0x24,0xd9,0xcc,0xda,0x27,0x10,0xac,0xad,0xe2,0x56},
		T9[]=  {0x99,0x24,0xa7,0xc8,0x58,0x73,0x36,0xbf,0xb1,0x18,0x02,0x4d,0xb8,0x67,0x4a,0x14};

/* Test Case 10 */
#define K10 K9
#define IV10 IV9
static const u8	P10[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
		A10[]= {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
			0xab,0xad,0xda,0xd2},
		C10[]= {0x39,0x80,0xca,0x0b,0x3c,0x00,0xe8,0x41,0xeb,0x06,0xfa,0xc4,0x87,0x2a,0x27,0x57,
			0x85,0x9e,0x1c,0xea,0xa6,0xef,0xd9,0x84,0x62,0x85,0x93,0xb4,0x0c,0xa1,0xe1,0x9c,
			0x7d,0x77,0x3d,0x00,0xc1,0x44,0xc5,0x25,0xac,0x61,0x9d,0x18,0xc8,0x4a,0x3f,0x47,
			0x18,0xe2,0x44,0x8b,0x2f,0xe3,0x24,0xd9,0xcc,0xda,0x27,0x10},
		T10[]= {0x25,0x19,0x49,0x8e,0x80,0xf1,0x47,0x8f,0x37,0xba,0x55,0xbd,0x6d,0x27,0x61,0x8c};

/* Test Case 11 */
#define K11 K10
#define P11 P10
#define A11 A10
static const u8	IV11[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
		C11[]= {0x0f,0x10,0xf5,0x99,0xae,0x14,0xa1,0x54,0xed,0x24,0xb3,0x6e,0x25,0x32,0x4d,0xb8,
			0xc5,0x66,0x63,0x2e,0xf2,0xbb,0xb3,0x4f,0x83,0x47,0x28,0x0f,0xc4,0x50,0x70,0x57,
			0xfd,0xdc,0x29,0xdf,0x9a,0x47,0x1f,0x75,0xc6,0x65,0x41,0xd4,0xd4,0xda,0xd1,0xc9,
			0xe9,0x3a,0x19,0xa5,0x8e,0x8b,0x47,0x3f,0xa0,0xf0,0x62,0xf7},
		T11[]= {0x65,0xdc,0xc5,0x7f,0xcf,0x62,0x3a,0x24,0x09,0x4f,0xcc,0xa4,0x0d,0x35,0x33,0xf8};

/* Test Case 12 */
#define K12 K11
#define P12 P11
#define A12 A11
static const u8	IV12[]={0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
			0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
			0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
			0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
		C12[]= {0xd2,0x7e,0x88,0x68,0x1c,0xe3,0x24,0x3c,0x48,0x30,0x16,0x5a,0x8f,0xdc,0xf9,0xff,
			0x1d,0xe9,0xa1,0xd8,0xe6,0xb4,0x47,0xef,0x6e,0xf7,0xb7,0x98,0x28,0x66,0x6e,0x45,
			0x81,0xe7,0x90,0x12,0xaf,0x34,0xdd,0xd9,0xe2,0xf0,0x37,0x58,0x9b,0x29,0x2d,0xb3,
			0xe6,0x7c,0x03,0x67,0x45,0xfa,0x22,0xe7,0xe9,0xb7,0x37,0x3b},
		T12[]= {0xdc,0xf5,0x66,0xff,0x29,0x1c,0x25,0xbb,0xb8,0x56,0x8f,0xc3,0xd3,0x76,0xa6,0xd9};

/* Test Case 13 */
static const u8	K13[32],
		*P13=NULL,
		*A13=NULL,
		IV13[12],
		*C13=NULL,
		T13[]={0x53,0x0f,0x8a,0xfb,0xc7,0x45,0x36,0xb9,0xa9,0x63,0xb4,0xf1,0xc4,0xcb,0x73,0x8b};

/* Test Case 14 */
#define K14 K13
#define A14 A13
static const u8	P14[16],
		IV14[12],
		C14[]= {0xce,0xa7,0x40,0x3d,0x4d,0x60,0x6b,0x6e,0x07,0x4e,0xc5,0xd3,0xba,0xf3,0x9d,0x18},
		T14[]= {0xd0,0xd1,0xc8,0xa7,0x99,0x99,0x6b,0xf0,0x26,0x5b,0x98,0xb5,0xd4,0x8a,0xb9,0x19};

/* Test Case 15 */
#define A15 A14
static const u8	K15[]= {0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08,
			0xfe,0xff,0xe9,0x92,0x86,0x65,0x73,0x1c,0x6d,0x6a,0x8f,0x94,0x67,0x30,0x83,0x08},
		P15[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55},
		IV15[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad,0xde,0xca,0xf8,0x88},
		C15[]= {0x52,0x2d,0xc1,0xf0,0x99,0x56,0x7d,0x07,0xf4,0x7f,0x37,0xa3,0x2a,0x84,0x42,0x7d,
			0x64,0x3a,0x8c,0xdc,0xbf,0xe5,0xc0,0xc9,0x75,0x98,0xa2,0xbd,0x25,0x55,0xd1,0xaa,
			0x8c,0xb0,0x8e,0x48,0x59,0x0d,0xbb,0x3d,0xa7,0xb0,0x8b,0x10,0x56,0x82,0x88,0x38,
			0xc5,0xf6,0x1e,0x63,0x93,0xba,0x7a,0x0a,0xbc,0xc9,0xf6,0x62,0x89,0x80,0x15,0xad},
		T15[]= {0xb0,0x94,0xda,0xc5,0xd9,0x34,0x71,0xbd,0xec,0x1a,0x50,0x22,0x70,0xe3,0xcc,0x6c};

/* Test Case 16 */
#define K16 K15
#define IV16 IV15
static const u8	P16[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39},
		A16[]= {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
			0xab,0xad,0xda,0xd2},
		C16[]= {0x52,0x2d,0xc1,0xf0,0x99,0x56,0x7d,0x07,0xf4,0x7f,0x37,0xa3,0x2a,0x84,0x42,0x7d,
			0x64,0x3a,0x8c,0xdc,0xbf,0xe5,0xc0,0xc9,0x75,0x98,0xa2,0xbd,0x25,0x55,0xd1,0xaa,
			0x8c,0xb0,0x8e,0x48,0x59,0x0d,0xbb,0x3d,0xa7,0xb0,0x8b,0x10,0x56,0x82,0x88,0x38,
			0xc5,0xf6,0x1e,0x63,0x93,0xba,0x7a,0x0a,0xbc,0xc9,0xf6,0x62},
		T16[]= {0x76,0xfc,0x6e,0xce,0x0f,0x4e,0x17,0x68,0xcd,0xdf,0x88,0x53,0xbb,0x2d,0x55,0x1b};

/* Test Case 17 */
#define K17 K16
#define P17 P16
#define A17 A16
static const u8	IV17[]={0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
		C17[]= {0xc3,0x76,0x2d,0xf1,0xca,0x78,0x7d,0x32,0xae,0x47,0xc1,0x3b,0xf1,0x98,0x44,0xcb,
			0xaf,0x1a,0xe1,0x4d,0x0b,0x97,0x6a,0xfa,0xc5,0x2f,0xf7,0xd7,0x9b,0xba,0x9d,0xe0,
			0xfe,0xb5,0x82,0xd3,0x39,0x34,0xa4,0xf0,0x95,0x4c,0xc2,0x36,0x3b,0xc7,0x3f,0x78,
			0x62,0xac,0x43,0x0e,0x64,0xab,0xe4,0x99,0xf4,0x7c,0x9b,0x1f},
		T17[]= {0x3a,0x33,0x7d,0xbf,0x46,0xa7,0x92,0xc4,0x5e,0x45,0x49,0x13,0xfe,0x2e,0xa8,0xf2};

/* Test Case 18 */
#define K18 K17
#define P18 P17
#define A18 A17
static const u8	IV18[]={0x93,0x13,0x22,0x5d,0xf8,0x84,0x06,0xe5,0x55,0x90,0x9c,0x5a,0xff,0x52,0x69,0xaa,
			0x6a,0x7a,0x95,0x38,0x53,0x4f,0x7d,0xa1,0xe4,0xc3,0x03,0xd2,0xa3,0x18,0xa7,0x28,
			0xc3,0xc0,0xc9,0x51,0x56,0x80,0x95,0x39,0xfc,0xf0,0xe2,0x42,0x9a,0x6b,0x52,0x54,
			0x16,0xae,0xdb,0xf5,0xa0,0xde,0x6a,0x57,0xa6,0x37,0xb3,0x9b},
		C18[]= {0x5a,0x8d,0xef,0x2f,0x0c,0x9e,0x53,0xf1,0xf7,0x5d,0x78,0x53,0x65,0x9e,0x2a,0x20,
			0xee,0xb2,0xb2,0x2a,0xaf,0xde,0x64,0x19,0xa0,0x58,0xab,0x4f,0x6f,0x74,0x6b,0xf4,
			0x0f,0xc0,0xc3,0xb7,0x80,0xf2,0x44,0x45,0x2d,0xa3,0xeb,0xf1,0xc5,0xd8,0x2c,0xde,
			0xa2,0x41,0x89,0x97,0x20,0x0e,0xf8,0x2e,0x44,0xae,0x7e,0x3f},
		T18[]= {0xa4,0x4a,0x82,0x66,0xee,0x1c,0x8e,0xb0,0xc8,0xb5,0xd4,0xcf,0x5a,0xe9,0xf1,0x9a};

/* Test Case 19 */
#define K19 K1
#define P19 P1
#define IV19 IV1
#define C19 C1
static const u8 A19[]= {0xd9,0x31,0x32,0x25,0xf8,0x84,0x06,0xe5,0xa5,0x59,0x09,0xc5,0xaf,0xf5,0x26,0x9a,
			0x86,0xa7,0xa9,0x53,0x15,0x34,0xf7,0xda,0x2e,0x4c,0x30,0x3d,0x8a,0x31,0x8a,0x72,
			0x1c,0x3c,0x0c,0x95,0x95,0x68,0x09,0x53,0x2f,0xcf,0x0e,0x24,0x49,0xa6,0xb5,0x25,
			0xb1,0x6a,0xed,0xf5,0xaa,0x0d,0xe6,0x57,0xba,0x63,0x7b,0x39,0x1a,0xaf,0xd2,0x55,
			0x52,0x2d,0xc1,0xf0,0x99,0x56,0x7d,0x07,0xf4,0x7f,0x37,0xa3,0x2a,0x84,0x42,0x7d,
			0x64,0x3a,0x8c,0xdc,0xbf,0xe5,0xc0,0xc9,0x75,0x98,0xa2,0xbd,0x25,0x55,0xd1,0xaa,
			0x8c,0xb0,0x8e,0x48,0x59,0x0d,0xbb,0x3d,0xa7,0xb0,0x8b,0x10,0x56,0x82,0x88,0x38,
			0xc5,0xf6,0x1e,0x63,0x93,0xba,0x7a,0x0a,0xbc,0xc9,0xf6,0x62,0x89,0x80,0x15,0xad},
		T19[]= {0x5f,0xea,0x79,0x3a,0x2d,0x6f,0x97,0x4d,0x37,0xe6,0x8e,0x0c,0xb8,0xff,0x94,0x92};

/* Test Case 20 */
#define K20 K1
#define A20 A1
static const u8 IV20[64]={0xff,0xff,0xff,0xff},	/* this results in 0xff in counter LSB */
		P20[288],
		C20[]= {0x56,0xb3,0x37,0x3c,0xa9,0xef,0x6e,0x4a,0x2b,0x64,0xfe,0x1e,0x9a,0x17,0xb6,0x14,
			0x25,0xf1,0x0d,0x47,0xa7,0x5a,0x5f,0xce,0x13,0xef,0xc6,0xbc,0x78,0x4a,0xf2,0x4f,
			0x41,0x41,0xbd,0xd4,0x8c,0xf7,0xc7,0x70,0x88,0x7a,0xfd,0x57,0x3c,0xca,0x54,0x18,
			0xa9,0xae,0xff,0xcd,0x7c,0x5c,0xed,0xdf,0xc6,0xa7,0x83,0x97,0xb9,0xa8,0x5b,0x49,
			0x9d,0xa5,0x58,0x25,0x72,0x67,0xca,0xab,0x2a,0xd0,0xb2,0x3c,0xa4,0x76,0xa5,0x3c,
			0xb1,0x7f,0xb4,0x1c,0x4b,0x8b,0x47,0x5c,0xb4,0xf3,0xf7,0x16,0x50,0x94,0xc2,0x29,
			0xc9,0xe8,0xc4,0xdc,0x0a,0x2a,0x5f,0xf1,0x90,0x3e,0x50,0x15,0x11,0x22,0x13,0x76,
			0xa1,0xcd,0xb8,0x36,0x4c,0x50,0x61,0xa2,0x0c,0xae,0x74,0xbc,0x4a,0xcd,0x76,0xce,
			0xb0,0xab,0xc9,0xfd,0x32,0x17,0xef,0x9f,0x8c,0x90,0xbe,0x40,0x2d,0xdf,0x6d,0x86,
			0x97,0xf4,0xf8,0x80,0xdf,0xf1,0x5b,0xfb,0x7a,0x6b,0x28,0x24,0x1e,0xc8,0xfe,0x18,
			0x3c,0x2d,0x59,0xe3,0xf9,0xdf,0xff,0x65,0x3c,0x71,0x26,0xf0,0xac,0xb9,0xe6,0x42,
			0x11,0xf4,0x2b,0xae,0x12,0xaf,0x46,0x2b,0x10,0x70,0xbe,0xf1,0xab,0x5e,0x36,0x06,
			0x87,0x2c,0xa1,0x0d,0xee,0x15,0xb3,0x24,0x9b,0x1a,0x1b,0x95,0x8f,0x23,0x13,0x4c,
			0x4b,0xcc,0xb7,0xd0,0x32,0x00,0xbc,0xe4,0x20,0xa2,0xf8,0xeb,0x66,0xdc,0xf3,0x64,
			0x4d,0x14,0x23,0xc1,0xb5,0x69,0x90,0x03,0xc1,0x3e,0xce,0xf4,0xbf,0x38,0xa3,0xb6,
			0x0e,0xed,0xc3,0x40,0x33,0xba,0xc1,0x90,0x27,0x83,0xdc,0x6d,0x89,0xe2,0xe7,0x74,
			0x18,0x8a,0x43,0x9c,0x7e,0xbc,0xc0,0x67,0x2d,0xbd,0xa4,0xdd,0xcf,0xb2,0x79,0x46,
			0x13,0xb0,0xbe,0x41,0x31,0x5e,0xf7,0x78,0x70,0x8a,0x70,0xee,0x7d,0x75,0x16,0x5c},
		T20[]= {0x8b,0x30,0x7f,0x6b,0x33,0x28,0x6d,0x0a,0xb0,0x26,0xa9,0xed,0x3f,0xe1,0xe8,0x5f};

#define TEST_CASE(n)	do {					\
	u8 out[sizeof(P##n)];					\
	AES_set_encrypt_key(K##n,sizeof(K##n)*8,&key);		\
	CRYPTO_gcm128_init(&ctx,&key,(block128_f)AES_encrypt);	\
	CRYPTO_gcm128_setiv(&ctx,IV##n,sizeof(IV##n));		\
	memset(out,0,sizeof(out));				\
	if (A##n) CRYPTO_gcm128_aad(&ctx,A##n,sizeof(A##n));	\
	if (P##n) CRYPTO_gcm128_encrypt(&ctx,P##n,out,sizeof(out));	\
	if (CRYPTO_gcm128_finish(&ctx,T##n,16) ||		\
	    (C##n && memcmp(out,C##n,sizeof(out))))		\
		ret++, printf ("encrypt test#%d failed.\n",n);	\
	CRYPTO_gcm128_setiv(&ctx,IV##n,sizeof(IV##n));		\
	memset(out,0,sizeof(out));				\
	if (A##n) CRYPTO_gcm128_aad(&ctx,A##n,sizeof(A##n));	\
	if (C##n) CRYPTO_gcm128_decrypt(&ctx,C##n,out,sizeof(out));	\
	if (CRYPTO_gcm128_finish(&ctx,T##n,16) ||		\
	    (P##n && memcmp(out,P##n,sizeof(out))))		\
		ret++, printf ("decrypt test#%d failed.\n",n);	\
	} while(0)

int main()
{
	GCM128_CONTEXT ctx;
	AES_KEY key;
	int ret=0;

	TEST_CASE(1);
	TEST_CASE(2);
	TEST_CASE(3);
	TEST_CASE(4);
	TEST_CASE(5);
	TEST_CASE(6);
	TEST_CASE(7);
	TEST_CASE(8);
	TEST_CASE(9);
	TEST_CASE(10);
	TEST_CASE(11);
	TEST_CASE(12);
	TEST_CASE(13);
	TEST_CASE(14);
	TEST_CASE(15);
	TEST_CASE(16);
	TEST_CASE(17);
	TEST_CASE(18);
	TEST_CASE(19);
	TEST_CASE(20);

#ifdef OPENSSL_CPUID_OBJ
	{
	size_t start,stop,gcm_t,ctr_t,OPENSSL_rdtsc();
	union { u64 u; u8 c[1024]; } buf;
	int i;

	AES_set_encrypt_key(K1,sizeof(K1)*8,&key);
	CRYPTO_gcm128_init(&ctx,&key,(block128_f)AES_encrypt);
	CRYPTO_gcm128_setiv(&ctx,IV1,sizeof(IV1));

	CRYPTO_gcm128_encrypt(&ctx,buf.c,buf.c,sizeof(buf));
	start = OPENSSL_rdtsc();
	CRYPTO_gcm128_encrypt(&ctx,buf.c,buf.c,sizeof(buf));
	gcm_t = OPENSSL_rdtsc() - start;

	CRYPTO_ctr128_encrypt(buf.c,buf.c,sizeof(buf),
			&key,ctx.Yi.c,ctx.EKi.c,&ctx.mres,
			(block128_f)AES_encrypt);
	start = OPENSSL_rdtsc();
	CRYPTO_ctr128_encrypt(buf.c,buf.c,sizeof(buf),
			&key,ctx.Yi.c,ctx.EKi.c,&ctx.mres,
			(block128_f)AES_encrypt);
	ctr_t = OPENSSL_rdtsc() - start;

	printf("%.2f-%.2f=%.2f\n",
			gcm_t/(double)sizeof(buf),
			ctr_t/(double)sizeof(buf),
			(gcm_t-ctr_t)/(double)sizeof(buf));
#ifdef GHASH
	{
	void (*gcm_ghash_p)(u64 Xi[2],const u128 Htable[16],
				const u8 *inp,size_t len)	= ctx.ghash;

	GHASH((&ctx),buf.c,sizeof(buf));
	start = OPENSSL_rdtsc();
	for (i=0;i<100;++i) GHASH((&ctx),buf.c,sizeof(buf));
	gcm_t = OPENSSL_rdtsc() - start;
	printf("%.2f\n",gcm_t/(double)sizeof(buf)/(double)i);
	}
#endif
	}
#endif

	return ret;
}
#endif