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| author | Egor Tensin <Egor.Tensin@gmail.com> | 2015-06-04 03:18:34 +0300 |
|---|---|---|
| committer | Egor Tensin <Egor.Tensin@gmail.com> | 2015-06-04 03:18:34 +0300 |
| commit | 21b736e980709dad61c1412e22ec26265bfe4f0e (patch) | |
| tree | 0a29fafff6a9b6c5a31d39c39480dca5084bbcb0 /include | |
| parent | add BE-to-LE conversion functions (diff) | |
| download | aes-tools-21b736e980709dad61c1412e22ec26265bfe4f0e.tar.gz aes-tools-21b736e980709dad61c1412e22ec26265bfe4f0e.zip | |
add CTR mode
Diffstat (limited to 'include')
| -rw-r--r-- | include/aesni/api.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/aesni/api.h b/include/aesni/api.h index fff3672..3318aef 100644 --- a/include/aesni/api.h +++ b/include/aesni/api.h @@ -105,6 +105,30 @@ static __inline AesBlock128 __fastcall aes128ofb_decrypt( return _mm_xor_si128(tmp, cypher); } +static __inline AesBlock128 __fastcall aes128ctr_encrypt( + AesBlock128 plain, + Aes128KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(plain, raw_aes128ecb_encrypt(init_vector, key_schedule)); +} + +static __inline AesBlock128 __fastcall aes128ctr_decrypt( + AesBlock128 cypher, + Aes128KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(cypher, raw_aes128ecb_encrypt(init_vector, key_schedule)); +} + static __inline void __fastcall aes192_expand_key_schedule( AesBlock192* key, Aes192KeySchedule* key_schedule) @@ -199,6 +223,30 @@ static __inline AesBlock128 __fastcall aes192ofb_decrypt( return _mm_xor_si128(tmp, cypher); } +static __inline AesBlock128 __fastcall aes192ctr_encrypt( + AesBlock128 plain, + Aes192KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(plain, raw_aes192ecb_encrypt(init_vector, key_schedule)); +} + +static __inline AesBlock128 __fastcall aes192ctr_decrypt( + AesBlock128 cypher, + Aes192KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(cypher, raw_aes192ecb_encrypt(init_vector, key_schedule)); +} + static __inline void __fastcall aes256_expand_key_schedule( AesBlock256* key, Aes256KeySchedule* key_schedule) @@ -292,3 +340,27 @@ static __inline AesBlock128 __fastcall aes256ofb_decrypt( _mm_storeu_si128(next_init_vector, tmp); return _mm_xor_si128(tmp, cypher); } + +static __inline AesBlock128 __fastcall aes256ctr_encrypt( + AesBlock128 plain, + Aes256KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(plain, raw_aes256ecb_encrypt(init_vector, key_schedule)); +} + +static __inline AesBlock128 __fastcall aes256ctr_decrypt( + AesBlock128 cypher, + Aes256KeySchedule* key_schedule, + AesBlock128 init_vector, + int counter) +{ + init_vector = aes128_le2be(init_vector); + init_vector = _mm_add_epi32(init_vector, make_aes_block128(0, 0, 0, counter)); + init_vector = aes128_be2le(init_vector); + return _mm_xor_si128(cypher, raw_aes256ecb_encrypt(init_vector, key_schedule)); +} |