From 1bd0b66128ab1b2b2cd6476fd378a6e304a769be Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 3 Jun 2015 22:36:04 +0300
Subject: add OFB mode

---
 include/aesni/api.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'include')

diff --git a/include/aesni/api.h b/include/aesni/api.h
index 6e30b65..6d275a5 100644
--- a/include/aesni/api.h
+++ b/include/aesni/api.h
@@ -71,6 +71,22 @@ static __inline AesBlock128 __fastcall aes128cfb_decrypt(
     return _mm_xor_si128(raw_aes128ecb_encrypt(init_vector, key_schedule), cypher);
 }
 
+static __inline AesBlock128 __fastcall aes128ofb_encrypt(
+    AesBlock128 plain,
+    Aes128KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes128ecb_encrypt(init_vector, key_schedule), plain);
+}
+
+static __inline AesBlock128 __fastcall aes128ofb_decrypt(
+    AesBlock128 cypher,
+    Aes128KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes128ecb_encrypt(init_vector, key_schedule), cypher);
+}
+
 static __inline void __fastcall aes192_expand_key_schedule(
     AesBlock192* key,
     Aes192KeySchedule* key_schedule)
@@ -131,6 +147,22 @@ static __inline AesBlock128 __fastcall aes192cfb_decrypt(
     return _mm_xor_si128(raw_aes192ecb_encrypt(init_vector, key_schedule), cypher);
 }
 
+static __inline AesBlock128 __fastcall aes192ofb_encrypt(
+    AesBlock128 plain,
+    Aes192KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes192ecb_encrypt(init_vector, key_schedule), plain);
+}
+
+static __inline AesBlock128 __fastcall aes192ofb_decrypt(
+    AesBlock128 cypher,
+    Aes192KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes192ecb_encrypt(init_vector, key_schedule), cypher);
+}
+
 static __inline void __fastcall aes256_expand_key_schedule(
     AesBlock256* key,
     Aes256KeySchedule* key_schedule)
@@ -190,3 +222,19 @@ static __inline AesBlock128 __fastcall aes256cfb_decrypt(
 {
     return _mm_xor_si128(raw_aes256ecb_encrypt(init_vector, key_schedule), cypher);
 }
+
+static __inline AesBlock128 __fastcall aes256ofb_encrypt(
+    AesBlock128 plain,
+    Aes256KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes256ecb_encrypt(init_vector, key_schedule), plain);
+}
+
+static __inline AesBlock128 __fastcall aes256ofb_decrypt(
+    AesBlock128 cypher,
+    Aes256KeySchedule* key_schedule,
+    AesBlock128 init_vector)
+{
+    return _mm_xor_si128(raw_aes256ecb_encrypt(init_vector, key_schedule), cypher);
+}
-- 
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