diff options
Diffstat (limited to 'security/nss/lib/freebl/gcm.c')
| -rw-r--r-- | security/nss/lib/freebl/gcm.c | 171 |
1 files changed, 49 insertions, 122 deletions
diff --git a/security/nss/lib/freebl/gcm.c b/security/nss/lib/freebl/gcm.c index 0fdb0fd48..f1e16da78 100644 --- a/security/nss/lib/freebl/gcm.c +++ b/security/nss/lib/freebl/gcm.c @@ -17,18 +17,50 @@ #include <limits.h> -#ifdef NSS_X86_OR_X64 -#include <wmmintrin.h> /* clmul */ -#endif - /* Forward declarations */ +SECStatus gcm_HashInit_hw(gcmHashContext *ghash); +SECStatus gcm_HashWrite_hw(gcmHashContext *ghash, unsigned char *outbuf); SECStatus gcm_HashMult_hw(gcmHashContext *ghash, const unsigned char *buf, unsigned int count); +SECStatus gcm_HashZeroX_hw(gcmHashContext *ghash); SECStatus gcm_HashMult_sftw(gcmHashContext *ghash, const unsigned char *buf, unsigned int count); SECStatus gcm_HashMult_sftw32(gcmHashContext *ghash, const unsigned char *buf, unsigned int count); +/* Stub definitions for the above *_hw functions, which shouldn't be + * used unless NSS_X86_OR_X64 is defined */ +#ifndef NSS_X86_OR_X64 +SECStatus +gcm_HashWrite_hw(gcmHashContext *ghash, unsigned char *outbuf) +{ + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; +} + +SECStatus +gcm_HashMult_hw(gcmHashContext *ghash, const unsigned char *buf, + unsigned int count) +{ + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; +} + +SECStatus +gcm_HashInit_hw(gcmHashContext *ghash) +{ + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; +} + +SECStatus +gcm_HashZeroX_hw(gcmHashContext *ghash) +{ + PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); + return SECFailure; +} +#endif /* NSS_X86_OR_X64 */ + uint64_t get64(const unsigned char *bytes) { @@ -46,6 +78,8 @@ get64(const unsigned char *bytes) SECStatus gcmHash_InitContext(gcmHashContext *ghash, const unsigned char *H, PRBool sw) { + SECStatus rv = SECSuccess; + ghash->cLen = 0; ghash->bufLen = 0; PORT_Memset(ghash->counterBuf, 0, sizeof(ghash->counterBuf)); @@ -53,17 +87,7 @@ gcmHash_InitContext(gcmHashContext *ghash, const unsigned char *H, PRBool sw) ghash->h_low = get64(H + 8); ghash->h_high = get64(H); if (clmul_support() && !sw) { -#ifdef NSS_X86_OR_X64 - ghash->ghash_mul = gcm_HashMult_hw; - ghash->x = _mm_setzero_si128(); - /* MSVC requires __m64 to load epi64. */ - ghash->h = _mm_set_epi32(ghash->h_high >> 32, (uint32_t)ghash->h_high, - ghash->h_low >> 32, (uint32_t)ghash->h_low); - ghash->hw = PR_TRUE; -#else - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; -#endif /* NSS_X86_OR_X64 */ + rv = gcm_HashInit_hw(ghash); } else { /* We fall back to the software implementation if we can't use / don't * want to use pclmul. */ @@ -75,7 +99,7 @@ gcmHash_InitContext(gcmHashContext *ghash, const unsigned char *H, PRBool sw) ghash->x_high = ghash->x_low = 0; ghash->hw = PR_FALSE; } - return SECSuccess; + return rv; } #ifdef HAVE_INT128_SUPPORT @@ -283,102 +307,17 @@ gcm_HashMult_sftw32(gcmHashContext *ghash, const unsigned char *buf, } #endif /* HAVE_INT128_SUPPORT */ -SECStatus -gcm_HashMult_hw(gcmHashContext *ghash, const unsigned char *buf, - unsigned int count) -{ -#ifdef NSS_X86_OR_X64 - size_t i; - pre_align __m128i z_high post_align; - pre_align __m128i z_low post_align; - pre_align __m128i C post_align; - pre_align __m128i D post_align; - pre_align __m128i E post_align; - pre_align __m128i F post_align; - pre_align __m128i bin post_align; - pre_align __m128i Ci post_align; - pre_align __m128i tmp post_align; - - for (i = 0; i < count; i++, buf += 16) { - bin = _mm_set_epi16(((uint16_t)buf[0] << 8) | buf[1], - ((uint16_t)buf[2] << 8) | buf[3], - ((uint16_t)buf[4] << 8) | buf[5], - ((uint16_t)buf[6] << 8) | buf[7], - ((uint16_t)buf[8] << 8) | buf[9], - ((uint16_t)buf[10] << 8) | buf[11], - ((uint16_t)buf[12] << 8) | buf[13], - ((uint16_t)buf[14] << 8) | buf[15]); - Ci = _mm_xor_si128(bin, ghash->x); - - /* Do binary mult ghash->X = Ci * ghash->H. */ - C = _mm_clmulepi64_si128(Ci, ghash->h, 0x00); - D = _mm_clmulepi64_si128(Ci, ghash->h, 0x11); - E = _mm_clmulepi64_si128(Ci, ghash->h, 0x01); - F = _mm_clmulepi64_si128(Ci, ghash->h, 0x10); - tmp = _mm_xor_si128(E, F); - z_high = _mm_xor_si128(tmp, _mm_slli_si128(D, 8)); - z_high = _mm_unpackhi_epi64(z_high, D); - z_low = _mm_xor_si128(_mm_slli_si128(tmp, 8), C); - z_low = _mm_unpackhi_epi64(_mm_slli_si128(C, 8), z_low); - - /* Shift one to the left (multiply by x) as gcm spec is stupid. */ - C = _mm_slli_si128(z_low, 8); - E = _mm_srli_epi64(C, 63); - D = _mm_slli_si128(z_high, 8); - F = _mm_srli_epi64(D, 63); - /* Carry over */ - C = _mm_srli_si128(z_low, 8); - D = _mm_srli_epi64(C, 63); - z_low = _mm_or_si128(_mm_slli_epi64(z_low, 1), E); - z_high = _mm_or_si128(_mm_or_si128(_mm_slli_epi64(z_high, 1), F), D); - - /* Reduce */ - C = _mm_slli_si128(z_low, 8); - /* D = z_low << 127 */ - D = _mm_slli_epi64(C, 63); - /* E = z_low << 126 */ - E = _mm_slli_epi64(C, 62); - /* F = z_low << 121 */ - F = _mm_slli_epi64(C, 57); - /* z_low ^= (z_low << 127) ^ (z_low << 126) ^ (z_low << 121); */ - z_low = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(z_low, D), E), F); - C = _mm_srli_si128(z_low, 8); - /* D = z_low >> 1 */ - D = _mm_slli_epi64(C, 63); - D = _mm_or_si128(_mm_srli_epi64(z_low, 1), D); - /* E = z_low >> 2 */ - E = _mm_slli_epi64(C, 62); - E = _mm_or_si128(_mm_srli_epi64(z_low, 2), E); - /* F = z_low >> 7 */ - F = _mm_slli_epi64(C, 57); - F = _mm_or_si128(_mm_srli_epi64(z_low, 7), F); - /* ghash->x ^= z_low ^ (z_low >> 1) ^ (z_low >> 2) ^ (z_low >> 7); */ - ghash->x = _mm_xor_si128(_mm_xor_si128( - _mm_xor_si128(_mm_xor_si128(z_high, z_low), D), E), - F); - } - return SECSuccess; -#else - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; -#endif /* NSS_X86_OR_X64 */ -} - static SECStatus gcm_zeroX(gcmHashContext *ghash) { + SECStatus rv = SECSuccess; + if (ghash->hw) { -#ifdef NSS_X86_OR_X64 - ghash->x = _mm_setzero_si128(); - return SECSuccess; -#else - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; -#endif /* NSS_X86_OR_X64 */ + rv = gcm_HashZeroX_hw(ghash); } ghash->x_high = ghash->x_low = 0; - return SECSuccess; + return rv; } /* @@ -503,15 +442,10 @@ gcmHash_Final(gcmHashContext *ghash, unsigned char *outbuf, } if (ghash->hw) { -#ifdef NSS_X86_OR_X64 - uint64_t tmp_out[2]; - _mm_storeu_si128((__m128i *)tmp_out, ghash->x); - WRITE64(tmp_out[0], T + 8); - WRITE64(tmp_out[1], T); -#else - PORT_SetError(SEC_ERROR_LIBRARY_FAILURE); - return SECFailure; -#endif /* NSS_X86_OR_X64 */ + rv = gcm_HashWrite_hw(ghash, T); + if (rv != SECSuccess) { + goto cleanup; + } } else { WRITE64(ghash->x_low, T + 8); WRITE64(ghash->x_high, T); @@ -595,14 +529,7 @@ GCM_CreateContext(void *context, freeblCipherFunc cipher, if (gcm == NULL) { return NULL; } - /* aligned_alloc is C11 so we have to do it the old way. */ - ghash = PORT_ZAlloc(sizeof(gcmHashContext) + 15); - if (ghash == NULL) { - PORT_SetError(SEC_ERROR_NO_MEMORY); - goto loser; - } - ghash->mem = ghash; - ghash = (gcmHashContext *)(((uintptr_t)ghash + 15) & ~(uintptr_t)0x0F); + ghash = PORT_ZNewAligned(gcmHashContext, 16, mem); /* first plug in the ghash context */ gcm->ghash_context = ghash; |