Added AES CFB8 mode
diff --git a/library/aes.c b/library/aes.c
index 69da3f6..bc4b178 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -906,6 +906,39 @@
return( 0 );
}
+
+/*
+ * AES-CFB8 buffer encryption/decryption
+ */
+#include <stdio.h>
+int aes_crypt_cfb8( aes_context *ctx,
+ int mode,
+ size_t length,
+ unsigned char iv[16],
+ const unsigned char *input,
+ unsigned char *output )
+{
+ unsigned char c;
+ unsigned char ov[17];
+
+ while( length-- )
+ {
+ memcpy(ov, iv, 16);
+ aes_crypt_ecb( ctx, AES_ENCRYPT, iv, iv );
+
+ if( mode == AES_DECRYPT )
+ ov[16] = *input;
+
+ c = *output++ = (unsigned char)( iv[0] ^ *input++ );
+
+ if( mode == AES_ENCRYPT )
+ ov[16] = c;
+
+ memcpy(iv, ov + 1, 16);
+ }
+
+ return( 0 );
+}
#endif /*POLARSSL_CIPHER_MODE_CFB */
#if defined(POLARSSL_CIPHER_MODE_CTR)
