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-rw-r--r--src/block/aes_ssse3/aes_ssse3.cpp76
-rw-r--r--src/block/aes_ssse3/aes_ssse3.h22
2 files changed, 93 insertions, 5 deletions
diff --git a/src/block/aes_ssse3/aes_ssse3.cpp b/src/block/aes_ssse3/aes_ssse3.cpp
index be0408897..8a70a90d0 100644
--- a/src/block/aes_ssse3/aes_ssse3.cpp
+++ b/src/block/aes_ssse3/aes_ssse3.cpp
@@ -397,12 +397,80 @@ void AES_128_SSSE3::key_schedule(const byte keyb[], u32bit)
}
/*
-* Clear memory of sensitive data
+* AES-256 Encryption
*/
-void AES_128_SSSE3::clear()
+void AES_256_SSSE3::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
- EK.clear();
- DK.clear();
+ const __m128i* in_mm = (const __m128i*)in;
+ __m128i* out_mm = (__m128i*)out;
+
+ const __m128i* keys = (const __m128i*)&EK[0];
+
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ __m128i B = _mm_loadu_si128(in_mm + i);
+ _mm_storeu_si128(out_mm + i, aes_ssse3_encrypt(B, keys, 14));
+ }
+ }
+
+/*
+* AES-256 Decryption
+*/
+void AES_256_SSSE3::decrypt_n(const byte in[], byte out[], u32bit blocks) const
+ {
+ const __m128i* in_mm = (const __m128i*)in;
+ __m128i* out_mm = (__m128i*)out;
+
+ const __m128i* keys = (const __m128i*)&DK[0];
+
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ __m128i B = _mm_loadu_si128(in_mm + i);
+ _mm_storeu_si128(out_mm + i, aes_ssse3_decrypt(B, keys, 14));
+ }
+ }
+
+/*
+* AES-256 Key Schedule
+*/
+void AES_256_SSSE3::key_schedule(const byte keyb[], u32bit)
+ {
+ __m128i rcon = _mm_set_epi32(0x702A9808, 0x4D7C7D81,
+ 0x1F8391B9, 0xAF9DEEB6);
+
+ __m128i* EK_out = (__m128i*)&EK[0];
+ __m128i* DK_out = (__m128i*)&DK[0];
+
+ __m128i key1 = _mm_loadu_si128((const __m128i*)keyb);
+ __m128i key2 = _mm_loadu_si128((const __m128i*)(keyb + 16));
+
+ _mm_storeu_si128(DK_out + 14, _mm_shuffle_epi8(key1, sr[2]));
+
+ key1 = aes_schedule_transform(key1, k_ipt1, k_ipt2);
+ key2 = aes_schedule_transform(key2, k_ipt1, k_ipt2);
+
+ _mm_storeu_si128(EK_out + 0, key1);
+ _mm_storeu_si128(EK_out + 1, aes_schedule_mangle(key2, 3));
+
+ _mm_storeu_si128(DK_out + 13, aes_schedule_mangle_dec(key2, 1));
+
+ for(u32bit i = 2; i != 14; i += 2)
+ {
+ __m128i k_t = key2;
+ key1 = key2 = aes_schedule_round(&rcon, key2, key1);
+
+ _mm_storeu_si128(EK_out + i, aes_schedule_mangle(key2, i % 4));
+ _mm_storeu_si128(DK_out + (14-i), aes_schedule_mangle_dec(key2, (i+2) % 4));
+
+ key2 = aes_schedule_round(NULL, _mm_shuffle_epi32(key2, 0xFF), k_t);
+ _mm_storeu_si128(EK_out + i + 1, aes_schedule_mangle(key2, (i - 1) % 4));
+ _mm_storeu_si128(DK_out + (13-i), aes_schedule_mangle_dec(key2, (i+1) % 4));
+ }
+
+ key2 = aes_schedule_round(&rcon, key2, key1);
+
+ _mm_storeu_si128(EK_out + 14, aes_schedule_mangle_last(key2, 2));
+ _mm_storeu_si128(DK_out + 0, aes_schedule_mangle_last_dec(key2));
}
}
diff --git a/src/block/aes_ssse3/aes_ssse3.h b/src/block/aes_ssse3/aes_ssse3.h
index dea225b3c..25a3e97b9 100644
--- a/src/block/aes_ssse3/aes_ssse3.h
+++ b/src/block/aes_ssse3/aes_ssse3.h
@@ -21,7 +21,7 @@ class BOTAN_DLL AES_128_SSSE3 : public BlockCipher
void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
- void clear();
+ void clear() { EK.clear(); DK.clear(); }
std::string name() const { return "AES-128"; }
BlockCipher* clone() const { return new AES_128_SSSE3; }
@@ -32,6 +32,26 @@ class BOTAN_DLL AES_128_SSSE3 : public BlockCipher
SecureVector<u32bit, 44> EK, DK;
};
+/**
+* AES-256 using SSSE3
+*/
+class BOTAN_DLL AES_256_SSSE3 : public BlockCipher
+ {
+ public:
+ void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
+ void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
+
+ void clear() { EK.clear(); DK.clear(); }
+ std::string name() const { return "AES-256"; }
+ BlockCipher* clone() const { return new AES_256_SSSE3; }
+
+ AES_256_SSSE3() : BlockCipher(16, 32) {}
+ private:
+ void key_schedule(const byte[], u32bit);
+
+ SecureVector<u32bit, 60> EK, DK;
+ };
+
}
#endif