Add the modes OFB128, CFB128 and CTR128 to AES.

Submitted by Stephen Sprunk <stephen@sprunk.org>

crypto/aes/Makefile.ssl

@@ -26,8 +26,8 @@ TEST=
 APPS=
 
 LIB=$(TOP)/libcrypto.a
-LIBSRC=aes_core.c aes_misc.c aes_ecb.c aes_cbc.c
+LIBSRC=aes_core.c aes_misc.c aes_ecb.c aes_cbc.c aes_cfb.c aes_ofb.c aes_ctr.c
-LIBOBJ=aes_core.o aes_misc.o aes_ecb.o aes_cbc.o
+LIBOBJ=aes_core.o aes_misc.o aes_ecb.o aes_cbc.o aes_cfb.o aes_ofb.o aes_ctr.o
 
 SRC= $(LIBSRC)
 

crypto/aes/aes.h

@@ -1,6 +1,6 @@
 /* crypto/aes/aes.h -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -58,8 +58,10 @@
 
 static const int AES_DECRYPT = 0;
 static const int AES_ENCRYPT = 1;
-#define AES_MAXNR 14 /* array size can't be a const in C */
+/* Because array size can't be a const in C, the following two are macros.
-static const int AES_BLOCK_SIZE = 16; /* bytes */
+   Both sizes are in bytes. */
+#define AES_MAXNR 14
+#define AES_BLOCK_SIZE 16
 
 #ifdef  __cplusplus
 extern "C" {
@@ -74,17 +76,31 @@ typedef struct aes_key_st AES_KEY;
 
 const char *AES_options(void);
 
-int AES_set_encrypt_key(const unsigned char *userKey, const int bits, AES_KEY *key);
+int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
-int AES_set_decrypt_key(const unsigned char *userKey, const int bits, AES_KEY *key);
+	AES_KEY *key);
+int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
+	AES_KEY *key);
 
-void AES_encrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key);
+void AES_encrypt(const unsigned char *in, unsigned char *out,
-void AES_decrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key);
+	const AES_KEY *key);
+void AES_decrypt(const unsigned char *in, unsigned char *out,
+	const AES_KEY *key);
 
 void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
-	       	     const AES_KEY *key, const int enc);
+	const AES_KEY *key, const int enc);
 void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
-	       	     const unsigned long length, const AES_KEY *key,
+	const unsigned long length, const AES_KEY *key,
-		     unsigned char *ivec, const int enc);
+	unsigned char *ivec, const int enc);
+void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
+	const unsigned long length, const AES_KEY *key,
+	unsigned char *ivec, int *num, const int enc);
+void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
+	const unsigned long length, const AES_KEY *key,
+	unsigned char *ivec, int *num);
+void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
+	const unsigned long length, const AES_KEY *key,
+	unsigned char *counter, unsigned int *num);
+
 
 #ifdef  __cplusplus
 }

crypto/aes/aes_cbc.c

@@ -1,6 +1,6 @@
 /* crypto/aes/aes_cbc.c -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

crypto/aes/aes_core.c

@@ -715,16 +715,6 @@ static const u32 rcon[] = {
 	0x1B000000, 0x36000000, /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
 };
 
-#define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
-
-#ifdef _MSC_VER
-#define GETU32(p) SWAP(*((u32 *)(p)))
-#define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
-#else
-#define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ ((u32)(pt)[2] <<  8) ^ ((u32)(pt)[3]))
-#define PUTU32(ct, st) { (ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); (ct)[2] = (u8)((st) >>  8); (ct)[3] = (u8)(st); }
-#endif
-
 /**
  * Expand the cipher key into the encryption key schedule.
  */

crypto/aes/aes_ecb.c

@@ -1,6 +1,6 @@
 /* crypto/aes/aes_ecb.c -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

crypto/aes/aes_locl.h

@@ -1,6 +1,6 @@
 /* crypto/aes/aes.h -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -65,6 +65,15 @@
 #include <string.h>
 #endif
 
+#ifdef _MSC_VER
+# define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
+# define GETU32(p) SWAP(*((u32 *)(p)))
+# define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
+#else
+# define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ ((u32)(pt)[2] <<  8) ^ ((u32)(pt)[3]))
+# define PUTU32(ct, st) { (ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); (ct)[2] = (u8)((st) >>  8); (ct)[3] = (u8)(st); }
+#endif
+
 typedef unsigned long u32;
 typedef unsigned short u16;
 typedef unsigned char u8;

crypto/aes/aes_misc.c

@@ -1,6 +1,6 @@
 /* crypto/aes/aes_misc.c -*- mode:C; c-file-style: "eay" -*- */
 /* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions