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Differential D501 Diff 1439 cipher/cipher-gcm.c

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cipher/cipher-gcm.c

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ghash_armv7_neon (gcry_cipher_hd_t c, byte *result, const byte *buf, ghash_armv7_neon (gcry_cipher_hd_t c, byte *result, const byte *buf,
size_t nblocks) size_t nblocks)
{ {
return _gcry_ghash_armv7_neon(c->u_mode.gcm.u_ghash_key.key, result, buf, return _gcry_ghash_armv7_neon(c->u_mode.gcm.u_ghash_key.key, result, buf,
nblocks); nblocks);
} }
#endif /* GCM_USE_ARM_NEON */ #endif /* GCM_USE_ARM_NEON */
#ifdef GCM_USE_PPC_VPMSUM
extern void _gcry_ghash_setup_ppc_vpmsum (void *gcm_table, void *gcm_key);
/* result is 128-bits */
extern unsigned int _gcry_ghash_ppc_vpmsum (byte *result, void *gcm_table,
const byte *buf, size_t nblocks);
static void
ghash_setup_ppc_vpmsum (gcry_cipher_hd_t c)
{
_gcry_ghash_setup_ppc_vpmsum(c->u_mode.gcm.gcm_table, c->u_mode.gcm.u_ghash_key.key);
}
static unsigned int
ghash_ppc_vpmsum (gcry_cipher_hd_t c, byte *result, const byte *buf,
size_t nblocks)
{
unsigned __int128 *where = (unsigned __int128*)result;
_gcry_ghash_ppc_vpmsum(result, c->u_mode.gcm.gcm_table, buf,
nblocks);
return 0;
}
#endif /* GCM_USE_PPC_VPMSUM */
#ifdef GCM_USE_TABLES #ifdef GCM_USE_TABLES
static struct static struct
{ {
volatile u32 counter_head; volatile u32 counter_head;
u32 cacheline_align[64 / 4 - 1]; u32 cacheline_align[64 / 4 - 1];
u16 R[256]; u16 R[256];
volatile u32 counter_tail; volatile u32 counter_tail;
▲ Show 20 Lines • Show All 417 Lines • ▼ Show 20 Linesghash_internal (gcry_cipher_hd_t c, byte *result, const byte *buf,
return burn + (burn ? 5*sizeof(void*) : 0); return burn + (burn ? 5*sizeof(void*) : 0);
} }
static void static void
setupM (gcry_cipher_hd_t c) setupM (gcry_cipher_hd_t c)
{ {
#if defined(GCM_USE_INTEL_PCLMUL) || defined(GCM_USE_ARM_PMULL) #if defined(GCM_USE_INTEL_PCLMUL) || defined(GCM_USE_ARM_PMULL) || defined(GCM_USE_PPC_VPMSUM)
unsigned int features = _gcry_get_hw_features (); unsigned int features = _gcry_get_hw_features ();
#endif #endif
if (0) if (0)
; ;
#ifdef GCM_USE_INTEL_PCLMUL #ifdef GCM_USE_INTEL_PCLMUL
else if (features & HWF_INTEL_PCLMUL) else if (features & HWF_INTEL_PCLMUL)
{ {
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#endif #endif
#ifdef GCM_USE_ARM_NEON #ifdef GCM_USE_ARM_NEON
else if (features & HWF_ARM_NEON) else if (features & HWF_ARM_NEON)
{ {
c->u_mode.gcm.ghash_fn = ghash_armv7_neon; c->u_mode.gcm.ghash_fn = ghash_armv7_neon;
ghash_setup_armv7_neon (c); ghash_setup_armv7_neon (c);
} }
#endif #endif
#ifdef GCM_USE_PPC_VPMSUM
else if (features & HWF_PPC_VCRYPTO)
{
c->u_mode.gcm.ghash_fn = ghash_ppc_vpmsum;
ghash_setup_ppc_vpmsum (c);
}
#endif
else else
{ {
c->u_mode.gcm.ghash_fn = ghash_internal; c->u_mode.gcm.ghash_fn = ghash_internal;
fillM (c); fillM (c);
} }
} }
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