aboutsummaryrefslogtreecommitdiffstats
path: root/src/lib/modes
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/modes')
-rw-r--r--src/lib/modes/aead/gcm/clmul/clmul.cpp119
-rw-r--r--src/lib/modes/aead/gcm/gcm.cpp6
2 files changed, 46 insertions, 79 deletions
diff --git a/src/lib/modes/aead/gcm/clmul/clmul.cpp b/src/lib/modes/aead/gcm/clmul/clmul.cpp
index 0f07c2763..632de6d33 100644
--- a/src/lib/modes/aead/gcm/clmul/clmul.cpp
+++ b/src/lib/modes/aead/gcm/clmul/clmul.cpp
@@ -13,58 +13,51 @@ namespace Botan {
namespace {
-BOTAN_FUNC_ISA("pclmul,ssse3")
-inline __m128i gcm_multiply(const __m128i& x, const __m128i& H)
+BOTAN_FUNC_ISA("sse2")
+inline __m128i gcm_reduce(const __m128i& B0, const __m128i& B1)
{
- __m128i T0, T1, T2, T3, T4, T5;
+ __m128i T0, T1, T2, T3;
- T0 = _mm_clmulepi64_si128(x, H, 0x00);
- T1 = _mm_clmulepi64_si128(x, H, 0x01);
- T2 = _mm_clmulepi64_si128(x, H, 0x10);
- T3 = _mm_clmulepi64_si128(x, H, 0x11);
+ T0 = _mm_srli_epi32(B1, 31);
+ T1 = _mm_slli_epi32(B1, 1);
+ T2 = _mm_srli_epi32(B0, 31);
+ T3 = _mm_slli_epi32(B0, 1);
+
+ T3 = _mm_or_si128(T3, _mm_srli_si128(T0, 12));
+ T3 = _mm_or_si128(T3, _mm_slli_si128(T2, 4));
+ T1 = _mm_or_si128(T1, _mm_slli_si128(T0, 4));
+
+ T0 = _mm_xor_si128(_mm_slli_epi32(T1, 31), _mm_slli_epi32(T1, 30));
+ T0 = _mm_xor_si128(T0, _mm_slli_epi32(T1, 25));
+
+ T1 = _mm_xor_si128(T1, _mm_slli_si128(T0, 12));
+
+ T0 = _mm_xor_si128(T3, _mm_srli_si128(T0, 4));
+ T0 = _mm_xor_si128(T0, T1);
+ T0 = _mm_xor_si128(T0, _mm_srli_epi32(T1, 7));
+ T0 = _mm_xor_si128(T0, _mm_srli_epi32(T1, 1));
+ T0 = _mm_xor_si128(T0, _mm_srli_epi32(T1, 2));
+ return T0;
+ }
+
+BOTAN_FUNC_ISA("pclmul,sse2")
+inline __m128i gcm_multiply(const __m128i& H, const __m128i& x)
+ {
+ __m128i T0, T1, T2, T3, T4;
+
+ T0 = _mm_clmulepi64_si128(x, H, 0x11);
+ T1 = _mm_clmulepi64_si128(x, H, 0x10);
+ T2 = _mm_clmulepi64_si128(x, H, 0x01);
+ T3 = _mm_clmulepi64_si128(x, H, 0x00);
T1 = _mm_xor_si128(T1, T2);
- T2 = _mm_slli_si128(T1, 8);
- T1 = _mm_srli_si128(T1, 8);
- T0 = _mm_xor_si128(T0, T2);
- T3 = _mm_xor_si128(T3, T1);
-
- T4 = _mm_srli_epi32(T0, 31);
- T0 = _mm_slli_epi32(T0, 1);
-
- T5 = _mm_srli_epi32(T3, 31);
- T3 = _mm_slli_epi32(T3, 1);
-
- T2 = _mm_srli_si128(T4, 12);
- T5 = _mm_slli_si128(T5, 4);
- T4 = _mm_slli_si128(T4, 4);
- T0 = _mm_or_si128(T0, T4);
- T3 = _mm_or_si128(T3, T5);
- T3 = _mm_or_si128(T3, T2);
-
- T4 = _mm_slli_epi32(T0, 31);
- T5 = _mm_slli_epi32(T0, 30);
- T2 = _mm_slli_epi32(T0, 25);
-
- T4 = _mm_xor_si128(T4, T5);
- T4 = _mm_xor_si128(T4, T2);
- T5 = _mm_srli_si128(T4, 4);
- T3 = _mm_xor_si128(T3, T5);
- T4 = _mm_slli_si128(T4, 12);
- T0 = _mm_xor_si128(T0, T4);
- T3 = _mm_xor_si128(T3, T0);
-
- T4 = _mm_srli_epi32(T0, 1);
- T1 = _mm_srli_epi32(T0, 2);
- T2 = _mm_srli_epi32(T0, 7);
- T3 = _mm_xor_si128(T3, T1);
- T3 = _mm_xor_si128(T3, T2);
- T3 = _mm_xor_si128(T3, T4);
-
- return T3;
+ T0 = _mm_xor_si128(T0, _mm_srli_si128(T1, 8));
+ T3 = _mm_xor_si128(T3, _mm_slli_si128(T1, 8));
+
+ return gcm_reduce(T0, T3);
}
-BOTAN_FUNC_ISA("pclmul,ssse3")
+BOTAN_FUNC_ISA("pclmul,sse2")
inline __m128i gcm_multiply_x4(const __m128i& H1, const __m128i& H2, const __m128i& H3, const __m128i& H4,
const __m128i& X1, const __m128i& X2, const __m128i& X3, const __m128i& X4)
{
@@ -92,7 +85,7 @@ inline __m128i gcm_multiply_x4(const __m128i& H1, const __m128i& H2, const __m12
_mm_xor_si128(H3_X3_hi, H4_X4_hi));
__m128i T0 = _mm_xor_si128(lo, hi);
- __m128i T1, T2, T3, T4, T5;
+ __m128i T1, T2, T3, T4;
T1 = _mm_xor_si128(_mm_srli_si128(H1, 8), H1);
T2 = _mm_xor_si128(_mm_srli_si128(X1, 8), X1);
@@ -108,36 +101,10 @@ inline __m128i gcm_multiply_x4(const __m128i& H1, const __m128i& H2, const __m12
T0 = _mm_xor_si128(T0, _mm_clmulepi64_si128(T1, T2, 0x00));
T0 = _mm_xor_si128(T0, _mm_clmulepi64_si128(T3, T4, 0x00));
- T3 = _mm_xor_si128(_mm_slli_si128(T0, 8), lo);
T1 = _mm_xor_si128(_mm_srli_si128(T0, 8), hi);
+ T2 = _mm_xor_si128(_mm_slli_si128(T0, 8), lo);
- T0 = _mm_srli_epi32(T3, 31);
- T4 = _mm_srli_epi32(T1, 31);
- T3 = _mm_slli_epi32(T3, 1);
- T1 = _mm_slli_epi32(T1, 1);
-
- T1 = _mm_or_si128(T1, _mm_srli_si128(T0, 12));
- T1 = _mm_or_si128(T1, _mm_slli_si128(T4, 4));
- T3 = _mm_or_si128(T3, _mm_slli_si128(T0, 4));
-
- T0 = _mm_slli_epi32(T3, 31);
- T0 = _mm_xor_si128(T0, _mm_slli_epi32(T3, 30));
- T0 = _mm_xor_si128(T0, _mm_slli_epi32(T3, 25));
-
- T5 = _mm_srli_si128(T0, 4);
- T3 = _mm_xor_si128(T3, _mm_slli_si128(T0, 12));
- T2 = _mm_srli_epi32(T3, 1);
- T4 = _mm_srli_epi32(T3, 2);
- T0 = _mm_srli_epi32(T3, 7);
-
- // combine results: T0 ^ T1 ^ T2 ^ T3 ^ T4 ^ T5
- T0 = _mm_xor_si128(T0, T1);
- T2 = _mm_xor_si128(T2, T3);
- T4 = _mm_xor_si128(T4, T5);
-
- T0 = _mm_xor_si128(T0, T2);
- T0 = _mm_xor_si128(T0, T4);
- return T0;
+ return gcm_reduce(T1, T2);
}
}
@@ -205,7 +172,7 @@ void gcm_multiply_clmul(uint8_t x[16],
const __m128i m = _mm_shuffle_epi8(_mm_loadu_si128(input + i), BSWAP_MASK);
a = _mm_xor_si128(a, m);
- a = gcm_multiply(a, H);
+ a = gcm_multiply(H, a);
}
a = _mm_shuffle_epi8(a, BSWAP_MASK);
diff --git a/src/lib/modes/aead/gcm/gcm.cpp b/src/lib/modes/aead/gcm/gcm.cpp
index 4abf8b5f6..dfaffedb7 100644
--- a/src/lib/modes/aead/gcm/gcm.cpp
+++ b/src/lib/modes/aead/gcm/gcm.cpp
@@ -103,10 +103,10 @@ void GCM_Mode::start_msg(const uint8_t nonce[], size_t nonce_len)
m_ctr->set_iv(y0.data(), y0.size());
- secure_vector<uint8_t> m_enc_y0(GCM_BS);
- m_ctr->encipher(m_enc_y0);
+ zeroise(y0);
+ m_ctr->encipher(y0);
- m_ghash->start(m_enc_y0.data(), m_enc_y0.size());
+ m_ghash->start(y0.data(), y0.size());
}
size_t GCM_Encryption::process(uint8_t buf[], size_t sz)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 06:26:50 +0000