From 6b070da3e039d2ca7accae8489d8bc4a44ba652a Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 3 Jun 2015 20:55:09 +0300
Subject: implement CBC wrappers in C

---
 include/aesni/api.h | 24 ++++++++++++------------
 include/aesni/raw.h | 27 ---------------------------
 2 files changed, 12 insertions(+), 39 deletions(-)

(limited to 'include/aesni')

diff --git a/include/aesni/api.h b/include/aesni/api.h
index efcecc4..72e689b 100644
--- a/include/aesni/api.h
+++ b/include/aesni/api.h
@@ -42,17 +42,17 @@ static __inline AesBlock128 __fastcall aes128ecb_decrypt(
 static __inline AesBlock128 __fastcall aes128cbc_encrypt(
     AesBlock128 plain,
     Aes128KeySchedule* key_schedule,
-    AesBlock128* init_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes128cbc_encrypt(plain, key_schedule, init_vector);
+    return raw_aes128ecb_encrypt(_mm_xor_si128(plain, init_vector), key_schedule);
 }
 
 static __inline AesBlock128 __fastcall aes128cbc_decrypt(
     AesBlock128 cypher,
     Aes128KeySchedule* inverted_schedule,
-    AesBlock128* init_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes128cbc_decrypt(cypher, inverted_schedule, init_vector);
+    return _mm_xor_si128(raw_aes128ecb_decrypt(cypher, inverted_schedule), init_vector);
 }
 
 static __inline void __fastcall aes192_expand_key_schedule(
@@ -86,17 +86,17 @@ static __inline AesBlock128 __fastcall aes192ecb_decrypt(
 static __inline AesBlock128 __fastcall aes192cbc_encrypt(
     AesBlock128 plain,
     Aes192KeySchedule* key_schedule,
-    AesBlock128* initialization_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes192cbc_encrypt(plain, key_schedule, initialization_vector);
+    return raw_aes192ecb_encrypt(_mm_xor_si128(plain, init_vector), key_schedule);
 }
 
 static __inline AesBlock128 __fastcall aes192cbc_decrypt(
     AesBlock128 cypher,
     Aes192KeySchedule* inverted_schedule,
-    AesBlock128* initialization_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes192cbc_decrypt(cypher, inverted_schedule, initialization_vector);
+    return _mm_xor_si128(raw_aes192ecb_decrypt(cypher, inverted_schedule), init_vector);
 }
 
 static __inline void __fastcall aes256_expand_key_schedule(
@@ -130,15 +130,15 @@ static __inline AesBlock128 __fastcall aes256ecb_decrypt(
 static __inline AesBlock128 __fastcall aes256cbc_encrypt(
     AesBlock128 plain,
     Aes256KeySchedule* key_schedule,
-    AesBlock128* initialization_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes256cbc_encrypt(plain, key_schedule, initialization_vector);
+    return raw_aes256ecb_encrypt(_mm_xor_si128(plain, init_vector), key_schedule);
 }
 
 static __inline AesBlock128 __fastcall aes256cbc_decrypt(
     AesBlock128 cypher,
     Aes256KeySchedule* inverted_schedule,
-    AesBlock128* initialization_vector)
+    AesBlock128 init_vector)
 {
-    return raw_aes256cbc_decrypt(cypher, inverted_schedule, initialization_vector);
+    return _mm_xor_si128(raw_aes256ecb_decrypt(cypher, inverted_schedule), init_vector);
 }
diff --git a/include/aesni/raw.h b/include/aesni/raw.h
index db342c7..d6b9518 100644
--- a/include/aesni/raw.h
+++ b/include/aesni/raw.h
@@ -24,15 +24,6 @@ AesBlock128 __fastcall raw_aes128ecb_decrypt(
     AesBlock128 cypher,
     Aes128KeySchedule* inverted_schedule);
 
-AesBlock128 __fastcall raw_aes128cbc_encrypt(
-    AesBlock128 plain,
-    Aes128KeySchedule* key_schedule,
-    AesBlock128* iv);
-AesBlock128 __fastcall raw_aes128cbc_decrypt(
-    AesBlock128 cypher,
-    Aes128KeySchedule* inverted_schedule,
-    AesBlock128* iv);
-
 void __fastcall raw_aes192_expand_key_schedule(
     AesBlock128 key_lo,
     AesBlock128 key_hi,
@@ -48,15 +39,6 @@ AesBlock128 __fastcall raw_aes192ecb_decrypt(
     AesBlock128 cypher,
     Aes192KeySchedule* inverted_schedule);
 
-AesBlock128 __fastcall raw_aes192cbc_encrypt(
-    AesBlock128 plain,
-    Aes192KeySchedule* key_schedule,
-    AesBlock128 *iv);
-AesBlock128 __fastcall raw_aes192cbc_decrypt(
-    AesBlock128 cypher,
-    Aes192KeySchedule* inverted_schedule,
-    AesBlock128 *iv);
-
 void __fastcall raw_aes256_expand_key_schedule(
     AesBlock128 key_lo,
     AesBlock128 key_hi,
@@ -71,12 +53,3 @@ AesBlock128 __fastcall raw_aes256ecb_encrypt(
 AesBlock128 __fastcall raw_aes256ecb_decrypt(
     AesBlock128 cypher,
     Aes256KeySchedule* inverted_schedule);
-
-AesBlock128 __fastcall raw_aes256cbc_encrypt(
-    AesBlock128 plain,
-    Aes256KeySchedule* key_schedule,
-    AesBlock128 *iv);
-AesBlock128 __fastcall raw_aes256cbc_decrypt(
-    AesBlock128 cypher,
-    Aes256KeySchedule* inverted_schedule,
-    AesBlock128 *iv);
-- 
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