* ====================================================================
*/
+#define OPENSSL_FIPSAPI
+
+#include <openssl/crypto.h>
#include "modes_lcl.h"
#include <string.h>
#endif
#include <assert.h>
-typedef struct { u64 hi,lo; } u128;
-
#if defined(BSWAP4) && defined(STRICT_ALIGNMENT)
/* redefine, because alignment is ensured */
#undef GETU32
} \
} while(0)
-#ifdef TABLE_BITS
-#undef TABLE_BITS
-#endif
/*
* 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.
* - 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.
*/
-#define TABLE_BITS 4
-
#if TABLE_BITS==8
static void gcm_init_8bit(u128 Htable[256], u64 H[2])
}
}
-static void gcm_gmult_8bit(u64 Xi[2], u128 Htable[256])
+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};
+ __fips_constseg
static const size_t rem_8bit[256] = {
PACK(0x0000), PACK(0x01C2), PACK(0x0384), PACK(0x0246),
PACK(0x0708), PACK(0x06CA), PACK(0x048C), PACK(0x054E),
}
#ifndef GHASH_ASM
+__fips_constseg
static const size_t rem_4bit[16] = {
PACK(0x0000), PACK(0x1C20), PACK(0x3840), PACK(0x2460),
PACK(0x7080), PACK(0x6CA0), PACK(0x48C0), PACK(0x54E0),
size_t rem, nlo, nhi;
const union { long one; char little; } is_endian = {1};
+#if 1
do {
cnt = 15;
nlo = ((const u8 *)Xi)[15];
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 */
+ __fips_constseg
+ 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
/* 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 1024
+#define GHASH_CHUNK (3*1024)
#endif
#else /* TABLE_BITS */
#endif
-struct gcm128_context {
- /* Following 6 names follow names in GCM specification */
- union { u64 u[2]; u32 d[4]; u8 c[16]; } Yi,EKi,EK0,
- Xi,H,len;
- /* Pre-computed table used by gcm_gmult_* */
-#if TABLE_BITS==8
- u128 Htable[256];
-#else
- u128 Htable[16];
- void (*gmult)(u64 Xi[2],const u128 Htable[16]);
- void (*ghash)(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
-#endif
- unsigned int res, pad;
- block128_f block;
- void *key;
-};
-
-#if TABLE_BITS==4 && defined(GHASH_ASM) && !defined(I386_ONLY) && \
+#if TABLE_BITS==4 && defined(GHASH_ASM)
+# 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_IAX
+# 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
+# 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)
+# include "arm_arch.h"
+# if __ARM_ARCH__>=7
+# define GHASH_ASM_ARM
+# define GCM_FUNCREF_4BIT
+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);
+# endif
# endif
+#endif
+#ifdef GCM_FUNCREF_4BIT
# undef GCM_MUL
-# define GCM_MUL(ctx,Xi) (*((ctx)->gmult))(ctx->Xi.u,ctx->Htable)
-# undef GHASH
-# define GHASH(ctx,in,len) (*((ctx)->ghash))((ctx)->Xi.u,(ctx)->Htable,in,len)
+# 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)
#if TABLE_BITS==8
gcm_init_8bit(ctx->Htable,ctx->H.u);
#elif TABLE_BITS==4
-# if defined(GHASH_ASM_IAX)
- if (OPENSSL_ia32cap_P[1]&(1<<1)) {
+# 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)
- if (OPENSSL_ia32cap_P[0]&(1<<23)) {
+# 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;
ctx->ghash = gcm_ghash_4bit;
# endif
+# elif defined(GHASH_ASM_ARM)
+ if (OPENSSL_armcap_P & ARMV7_NEON) {
+ ctx->gmult = gcm_gmult_neon;
+ ctx->ghash = gcm_ghash_neon;
+ } else {
+ 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
{
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;
- ctx->len.u[1] = 0;
- ctx->res = 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.d[3] = ctr;
}
-void CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx,const unsigned char *aad,size_t len)
+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
- ctx->len.u[0] += len;
+ 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))) {
}
#endif
if (len) {
+ n = (unsigned int)len;
for (i=0; i<len; ++i) ctx->Xi.c[i] ^= aad[i];
- GCM_MUL(ctx,Xi);
}
+
+ ctx->ares = n;
+ return 0;
}
-void CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx,
+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;
+ }
- ctx->len.u[1] += len;
- n = ctx->res;
if (is_endian.little)
ctr = GETU32(ctx->Yi.c+12);
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) {
}
if (n==0) GCM_MUL(ctx,Xi);
else {
- ctx->res = n;
- return;
+ ctx->mres = n;
+ return 0;
}
}
#if defined(STRICT_ALIGNMENT)
size_t j=GHASH_CHUNK;
while (j) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
size_t j=i;
while (len>=16) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
#else
while (len>=16) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
#endif
if (len) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
}
- ctx->res = n;
- return;
+ ctx->mres = n;
+ return 0;
} while(0);
#endif
for (i=0;i<len;++i) {
if (n==0) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
GCM_MUL(ctx,Xi);
}
- ctx->res = n;
+ ctx->mres = n;
+ return 0;
}
-void CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx,
+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;
+ }
- ctx->len.u[1] += len;
- n = ctx->res;
if (is_endian.little)
ctr = GETU32(ctx->Yi.c+12);
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) {
}
if (n==0) GCM_MUL (ctx,Xi);
else {
- ctx->res = n;
- return;
+ ctx->mres = n;
+ return 0;
}
}
#if defined(STRICT_ALIGNMENT)
GHASH(ctx,in,GHASH_CHUNK);
while (j) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
if ((i = (len&(size_t)-16))) {
GHASH(ctx,in,i);
while (len>=16) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
#else
while (len>=16) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
#endif
if (len) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
}
}
- ctx->res = n;
- return;
+ ctx->mres = n;
+ return 0;
} while(0);
#endif
for (i=0;i<len;++i) {
u8 c;
if (n==0) {
- (*ctx->block)(ctx->Yi.c,ctx->EKi.c,ctx->key);
+ (*block)(ctx->Yi.c,ctx->EKi.c,key);
++ctr;
if (is_endian.little)
PUTU32(ctx->Yi.c+12,ctr);
ctx->Yi.d[3] = ctr;
}
c = in[i];
- out[i] ^= ctx->EKi.c[n];
+ out[i] = c^ctx->EKi.c[n];
ctx->Xi.c[n] ^= c;
n = (n+1)%16;
if (n==0)
GCM_MUL(ctx,Xi);
}
- ctx->res = n;
+ 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)
+ ctr = GETU32(ctx->Yi.c+12);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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;
}
-void CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx)
+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)
+ ctr = GETU32(ctx->Yi.c+12);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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)
+ PUTU32(ctx->Yi.c+12,ctr);
+ 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->res)
+ if (ctx->mres)
GCM_MUL(ctx,Xi);
if (is_endian.little) {
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)
/* Test Case 5 */
#define K5 K4
#define P5 P4
-static const u8 A5[]= {0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,0xfe,0xed,0xfa,0xce,0xde,0xad,0xbe,0xef,
- 0xab,0xad,0xda,0xd2},
- IV5[]= {0xca,0xfe,0xba,0xbe,0xfa,0xce,0xdb,0xad},
+#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,
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)); \
- CRYPTO_gcm128_finish(&ctx); \
- if (memcmp(ctx.Xi.c,T##n,16) || (C##n && memcmp(out,C##n,sizeof(out)))) \
- ret++, printf ("encrypt test#%d failed.\n",n);\
+ 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)); \
- CRYPTO_gcm128_finish(&ctx); \
- if (memcmp(ctx.Xi.c,T##n,16) || (P##n && memcmp(out,P##n,sizeof(out)))) \
- ret++, printf ("decrypt test#%d failed.\n",n);\
+ 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()
gcm_t = OPENSSL_rdtsc() - start;
CRYPTO_ctr128_encrypt(buf.c,buf.c,sizeof(buf),
- &key,ctx.Yi.c,ctx.EKi.c,&ctx.res,
+ &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.res,
+ &key,ctx.Yi.c,ctx.EKi.c,&ctx.mres,
(block128_f)AES_encrypt);
ctr_t = OPENSSL_rdtsc() - start;
projects / openssl.git / blobdiff