From: couturie <you@example.com>
Date: Sat, 30 Sep 2017 12:16:48 +0000 (+0200)
Subject: new
X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/Cipher_code.git/commitdiff_plain/a0503b76c805d08e9556705c3e690818ecac3abc

new
---

diff --git a/Arduino/libraries/Arduino-crypto-master/Crypto.cpp b/Arduino/libraries/Arduino-crypto-master/Crypto.cpp
index d2d8adf..2999026 100644
--- a/Arduino/libraries/Arduino-crypto-master/Crypto.cpp
+++ b/Arduino/libraries/Arduino-crypto-master/Crypto.cpp
@@ -652,6 +652,46 @@ void AES::process(const uint8_t *in, uint8_t *out, int length)
         decryptCBC(in, out, length);
 }
 
+
+void AES::encryptCTR(const uint8_t *in, uint8_t *out, int length)
+{
+    int i;
+    uint32_t tin[4], tout[4], iv[4];
+
+    memcpy(iv, _iv, AES_IV_SIZE);
+    for (i = 0; i < 4; i++)
+        tout[i] = crypto_ntohl(iv[i]);
+
+    for (length -= AES_BLOCKSIZE; length >= 0; length -= AES_BLOCKSIZE)
+    {
+        uint32_t msg_32[4];
+        uint32_t out_32[4];
+        memcpy(msg_32, in, AES_BLOCKSIZE);
+        in += AES_BLOCKSIZE;
+
+        for (i = 0; i < 4; i++)
+            tin[i] = crypto_ntohl(tout[i]);
+
+        AES::encrypt(tin);
+
+        for (i = 0; i < 4; i++)
+        {
+          
+            out_32[i] = crypto_htonl(tin[i])^msg_32[i];
+        }
+	 // tout[0]= tout[0]+1; 
+
+        memcpy(out, out_32, AES_BLOCKSIZE);
+        out += AES_BLOCKSIZE;
+    }
+
+    for (i = 0; i < 4; i++)
+        iv[i] = crypto_htonl(tout[i])+1;
+    memcpy(_iv, iv, AES_IV_SIZE);
+}
+
+
+
 void AES::encryptCBC(const uint8_t *in, uint8_t *out, int length)
 {
     int i;
diff --git a/Arduino/libraries/Arduino-crypto-master/Crypto.h b/Arduino/libraries/Arduino-crypto-master/Crypto.h
index 651d9f8..8959817 100644
--- a/Arduino/libraries/Arduino-crypto-master/Crypto.h
+++ b/Arduino/libraries/Arduino-crypto-master/Crypto.h
@@ -124,6 +124,7 @@ class AES
          * Note: the length must be a multiple of 16 bytes
          */
         void process(const uint8_t *in, uint8_t *out, int length);
+	void encryptCTR(const uint8_t *in, uint8_t *out, int length);
 	void encryptCBC(const uint8_t *in, uint8_t *out, int length);
         void decryptCBC(const uint8_t *in, uint8_t *out, int length);
         void convertKey();