Added mechanism to provide alternative cipher / hash implementations

All symmetric cipher algorithms and hash algorithms now include support
for a POLARSSL_XXX_ALT flag that prevents the definition of the
algorithm context structure and all 'core' functions.
(cherry picked from commit 4087c47043)

include/polarssl/aes.h

@@ -3,7 +3,7 @@
  *
  * \brief AES block cipher
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_AES_H
 #define POLARSSL_AES_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -42,6 +44,10 @@ typedef UINT32 uint32_t;
 #define POLARSSL_ERR_AES_INVALID_KEY_LENGTH                -0x0020  /**< Invalid key length. */
 #define POLARSSL_ERR_AES_INVALID_INPUT_LENGTH              -0x0022  /**< Invalid data input length. */
 
+#if !defined(POLARSSL_AES_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          AES context structure
  */
@@ -169,6 +175,19 @@ int aes_crypt_ctr( aes_context *ctx,
                        unsigned char stream_block[16],
                        const unsigned char *input,
                        unsigned char *output );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_AES_ALT */
+#include "aes_alt.h"
+#endif /* POLARSSL_AES_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

include/polarssl/arc4.h

@@ -3,7 +3,7 @@
  *
  * \brief The ARCFOUR stream cipher
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,8 +27,14 @@
 #ifndef POLARSSL_ARC4_H
 #define POLARSSL_ARC4_H
 
+#include "config.h"
+
 #include <string.h>
 
+#if !defined(POLARSSL_ARC4_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          ARC4 context structure
  */
@@ -66,6 +72,18 @@ void arc4_setup( arc4_context *ctx, const unsigned char *key, unsigned int keyle
 int arc4_crypt( arc4_context *ctx, size_t length, const unsigned char *input,
                 unsigned char *output );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_ARC4_ALT */
+#include "arc4_alt.h"
+#endif /* POLARSSL_ARC4_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

include/polarssl/blowfish.h

@@ -3,7 +3,7 @@
  *
  * \brief Blowfish block cipher
  *
- *  Copyright (C) 2012-2012, Brainspark B.V.
+ *  Copyright (C) 2012-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_BLOWFISH_H
 #define POLARSSL_BLOWFISH_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -46,6 +48,10 @@ typedef UINT32 uint32_t;
 #define POLARSSL_ERR_BLOWFISH_INVALID_KEY_LENGTH                -0x0016  /**< Invalid key length. */
 #define POLARSSL_ERR_BLOWFISH_INVALID_INPUT_LENGTH              -0x0018  /**< Invalid data input length. */
 
+#if !defined(POLARSSL_BLOWFISH_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          Blowfish context structure
  */
@@ -158,4 +164,8 @@ int blowfish_crypt_ctr( blowfish_context *ctx,
 }
 #endif
 
+#else  /* POLARSSL_BLOWFISH_ALT */
+#include "blowfish_alt.h"
+#endif /* POLARSSL_BLOWFISH_ALT */
+
 #endif /* blowfish.h */

include/polarssl/camellia.h

@@ -3,7 +3,7 @@
  *
  * \brief Camellia block cipher
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_CAMELLIA_H
 #define POLARSSL_CAMELLIA_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -42,6 +44,10 @@ typedef UINT32 uint32_t;
 #define POLARSSL_ERR_CAMELLIA_INVALID_KEY_LENGTH           -0x0024  /**< Invalid key length. */
 #define POLARSSL_ERR_CAMELLIA_INVALID_INPUT_LENGTH         -0x0026  /**< Invalid data input length. */
 
+#if !defined(POLARSSL_CAMELLIA_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          CAMELLIA context structure
  */
@@ -168,6 +174,18 @@ int camellia_crypt_ctr( camellia_context *ctx,
                        const unsigned char *input,
                        unsigned char *output );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_CAMELLIA_ALT */
+#include "camellia_alt.h"
+#endif /* POLARSSL_CAMELLIA_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

include/polarssl/config.h

@@ -104,6 +104,35 @@
  * \{
  */
 
+/**
+ * \def POLARSSL_XXX_ALT
+ *
+ * Uncomment a macro to let PolarSSL use your alternate core implementation of
+ * a symmetric or hash algorithm (e.g. platform specific assembly optimized
+ * implementations). Keep in mind that the function prototypes should remain
+ * the same.
+ *
+ * Example: In case you uncomment POLARSSL_AES_ALT, PolarSSL will no longer
+ * provide the "struct aes_context" definition and omit the base function
+ * declarations and implementations. "aes_alt.h" will be included from
+ * "aes.h" to include the new function definitions.
+ *
+ * Uncomment a macro to enable alternate implementation for core algorithm
+ * functions
+#define POLARSSL_AES_ALT
+#define POLARSSL_ARC4_ALT
+#define POLARSSL_BLOWFISH_ALT
+#define POLARSSL_CAMELLIA_ALT
+#define POLARSSL_DES_ALT
+#define POLARSSL_XTEA_ALT
+#define POLARSSL_MD2_ALT
+#define POLARSSL_MD4_ALT
+#define POLARSSL_MD5_ALT
+#define POLARSSL_SHA1_ALT
+#define POLARSSL_SHA2_ALT
+#define POLARSSL_SHA4_ALT
+ */
+
 /**
  * \def POLARSSL_AES_ROM_TABLES
  *

include/polarssl/des.h

@@ -3,7 +3,7 @@
  *
  * \brief DES block cipher
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_DES_H
 #define POLARSSL_DES_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -43,6 +45,10 @@ typedef UINT32 uint32_t;
 
 #define DES_KEY_SIZE    8
 
+#if !defined(POLARSSL_DES_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          DES context structure
  */
@@ -220,6 +226,18 @@ int des3_crypt_cbc( des3_context *ctx,
                      const unsigned char *input,
                      unsigned char *output );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_DES_ALT */
+#include "des_alt.h"
+#endif /* POLARSSL_DES_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

include/polarssl/md2.h

@@ -3,7 +3,7 @@
  *
  * \brief MD2 message digest algorithm (hash function)
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,10 +27,16 @@
 #ifndef POLARSSL_MD2_H
 #define POLARSSL_MD2_H
 
+#include "config.h"
+
 #include <string.h>
 
 #define POLARSSL_ERR_MD2_FILE_IO_ERROR                 -0x0070  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_MD2_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          MD2 context structure
  */
@@ -74,6 +80,18 @@ void md2_update( md2_context *ctx, const unsigned char *input, size_t ilen );
  */
 void md2_finish( md2_context *ctx, unsigned char output[16] );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_MD2_ALT */
+#include "md2_alt.h"
+#endif /* POLARSSL_MD2_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = MD2( input buffer )
  *

include/polarssl/md4.h

@@ -3,7 +3,7 @@
  *
  * \brief MD4 message digest algorithm (hash function)
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_MD4_H
 #define POLARSSL_MD4_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -38,6 +40,10 @@ typedef UINT32 uint32_t;
 
 #define POLARSSL_ERR_MD4_FILE_IO_ERROR                 -0x0072  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_MD4_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          MD4 context structure
  */
@@ -80,6 +86,18 @@ void md4_update( md4_context *ctx, const unsigned char *input, size_t ilen );
  */
 void md4_finish( md4_context *ctx, unsigned char output[16] );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_MD4_ALT */
+#include "md4_alt.h"
+#endif /* POLARSSL_MD4_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = MD4( input buffer )
  *

include/polarssl/md5.h

@@ -3,7 +3,7 @@
  *
  * \brief MD5 message digest algorithm (hash function)
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_MD5_H
 #define POLARSSL_MD5_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -38,6 +40,10 @@ typedef UINT32 uint32_t;
 
 #define POLARSSL_ERR_MD5_FILE_IO_ERROR                 -0x0074  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_MD5_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          MD5 context structure
  */
@@ -80,6 +86,21 @@ void md5_update( md5_context *ctx, const unsigned char *input, size_t ilen );
  */
 void md5_finish( md5_context *ctx, unsigned char output[16] );
 
+/* Internal use */
+void md5_process( md5_context *ctx, const unsigned char data[64] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_MD5_ALT */
+#include "md5_alt.h"
+#endif /* POLARSSL_MD5_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = MD5( input buffer )
  *
@@ -154,9 +175,6 @@ void md5_hmac( const unsigned char *key, size_t keylen,
  */
 int md5_self_test( int verbose );
 
-/* Internal use */
-void md5_process( md5_context *ctx, const unsigned char data[64] );
-
 #ifdef __cplusplus
 }
 #endif

include/polarssl/sha1.h

@@ -3,7 +3,7 @@
  *
  * \brief SHA-1 cryptographic hash function
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_SHA1_H
 #define POLARSSL_SHA1_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -38,6 +40,10 @@ typedef UINT32 uint32_t;
 
 #define POLARSSL_ERR_SHA1_FILE_IO_ERROR                -0x0076  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_SHA1_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          SHA-1 context structure
  */
@@ -80,6 +86,21 @@ void sha1_update( sha1_context *ctx, const unsigned char *input, size_t ilen );
  */
 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
 
+/* Internal use */
+void sha1_process( sha1_context *ctx, const unsigned char data[64] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_SHA1_ALT */
+#include "sha1_alt.h"
+#endif /* POLARSSL_SHA1_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = SHA-1( input buffer )
  *
@@ -152,9 +173,6 @@ void sha1_hmac( const unsigned char *key, size_t keylen,
  */
 int sha1_self_test( int verbose );
 
-/* Internal use */
-void sha1_process( sha1_context *ctx, const unsigned char data[64] );
-
 #ifdef __cplusplus
 }
 #endif

include/polarssl/sha2.h

@@ -3,7 +3,7 @@
  *
  * \brief SHA-224 and SHA-256 cryptographic hash function
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_SHA2_H
 #define POLARSSL_SHA2_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -38,6 +40,10 @@ typedef UINT32 uint32_t;
 
 #define POLARSSL_ERR_SHA2_FILE_IO_ERROR                -0x0078  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_SHA2_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          SHA-256 context structure
  */
@@ -82,6 +88,21 @@ void sha2_update( sha2_context *ctx, const unsigned char *input, size_t ilen );
  */
 void sha2_finish( sha2_context *ctx, unsigned char output[32] );
 
+/* Internal use */
+void sha2_process( sha2_context *ctx, const unsigned char data[64] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_SHA2_ALT */
+#include "sha2_alt.h"
+#endif /* POLARSSL_SHA2_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = SHA-256( input buffer )
  *
@@ -160,9 +181,6 @@ void sha2_hmac( const unsigned char *key, size_t keylen,
  */
 int sha2_self_test( int verbose );
 
-/* Internal use */
-void sha2_process( sha2_context *ctx, const unsigned char data[64] );
-
 #ifdef __cplusplus
 }
 #endif

include/polarssl/sha4.h

@@ -3,7 +3,7 @@
  *
  * \brief SHA-384 and SHA-512 cryptographic hash function
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_SHA4_H
 #define POLARSSL_SHA4_H
 
+#include "config.h"
+
 #include <string.h>
 
 #if defined(_MSC_VER) || defined(__WATCOMC__)
@@ -39,6 +41,10 @@
 
 #define POLARSSL_ERR_SHA4_FILE_IO_ERROR                -0x007A  /**< Read/write error in file. */
 
+#if !defined(POLARSSL_SHA1_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          SHA-512 context structure
  */
@@ -83,6 +89,18 @@ void sha4_update( sha4_context *ctx, const unsigned char *input, size_t ilen );
  */
 void sha4_finish( sha4_context *ctx, unsigned char output[64] );
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_SHA4_ALT */
+#include "sha4_alt.h"
+#endif /* POLARSSL_SHA4_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Output = SHA-512( input buffer )
  *

include/polarssl/xtea.h

@@ -3,7 +3,7 @@
  *
  * \brief XTEA block cipher (32-bit)
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_XTEA_H
 #define POLARSSL_XTEA_H
 
+#include "config.h"
+
 #include <string.h>
 
 #ifdef _MSC_VER
@@ -41,6 +43,10 @@ typedef UINT32 uint32_t;
 
 #define POLARSSL_ERR_XTEA_INVALID_INPUT_LENGTH             -0x0028  /**< The data input has an invalid length. */
 
+#if !defined(POLARSSL_XTEA_ALT)
+// Regular implementation
+//
+
 /**
  * \brief          XTEA context structure
  */
@@ -97,6 +103,18 @@ int xtea_crypt_cbc( xtea_context *ctx,
                     unsigned char *input,
                     unsigned char *output);
 
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_XTEA_ALT */
+#include "xtea_alt.h"
+#endif /* POLARSSL_XTEA_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

library/aes.c

@@ -1,7 +1,7 @@
 /*
  *  FIPS-197 compliant AES implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include "polarssl/padlock.h"
 #endif
 
+#if !defined(POLARSSL_AES_ALT)
+
 /*
  * 32-bit integer manipulation macros (little endian)
  */
@@ -914,6 +916,7 @@ int aes_crypt_ctr( aes_context *ctx,
     return( 0 );
 }
 #endif /* POLARSSL_CIPHER_MODE_CTR */
+#endif /* !POLARSSL_AES_ALT */
 
 #if defined(POLARSSL_SELF_TEST)
 

library/arc4.c

@@ -1,7 +1,7 @@
 /*
  *  An implementation of the ARCFOUR algorithm
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -34,6 +34,8 @@
 
 #include "polarssl/arc4.h"
 
+#if !defined(POLARSSL_ARC4_ALT)
+
 /*
  * ARC4 key schedule
  */
@@ -95,6 +97,8 @@ int arc4_crypt( arc4_context *ctx, size_t length, const unsigned char *input,
     return( 0 );
 }
 
+#endif /* !POLARSSL_ARC4_ALT */
+
 #if defined(POLARSSL_SELF_TEST)
 
 #include <string.h>

library/blowfish.c

@@ -1,7 +1,7 @@
 /*
  *  Blowfish implementation
  *
- *  Copyright (C) 2012-2012, Brainspark B.V.
+ *  Copyright (C) 2012-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -35,6 +35,8 @@
 
 #include "polarssl/blowfish.h"
 
+#if !defined(POLARSSL_BLOWFISH_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -626,4 +628,5 @@ static const uint32_t S[4][256] = {
         0xB74E6132L, 0xCE77E25BL, 0x578FDFE3L, 0x3AC372E6L  }
 };
 
+#endif /* !POLARSSL_BLOWFISH_ALT */
 #endif /* POLARSSL_BLOWFISH_C */

library/camellia.c

@@ -1,7 +1,7 @@
 /*
  *  Camellia implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -35,6 +35,8 @@
 
 #include "polarssl/camellia.h"
 
+#if !defined(POLARSSL_CAMELLIA_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -656,6 +658,7 @@ int camellia_crypt_ctr( camellia_context *ctx,
     return( 0 );
 }
 #endif /* POLARSSL_CIPHER_MODE_CTR */
+#endif /* !POLARSSL_CAMELLIA_ALT */
 
 #if defined(POLARSSL_SELF_TEST)
 

library/des.c

@@ -1,7 +1,7 @@
 /*
  *  FIPS-46-3 compliant Triple-DES implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -35,6 +35,8 @@
 
 #include "polarssl/des.h"
 
+#if !defined(POLARSSL_DES_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -751,6 +753,8 @@ int des3_crypt_cbc( des3_context *ctx,
     return( 0 );
 }
 
+#endif /* !POLARSSL_DES_ALT */
+
 #if defined(POLARSSL_SELF_TEST)
 
 #include <stdio.h>

library/md2.c

@@ -1,7 +1,7 @@
 /*
  *  RFC 1115/1319 compliant MD2 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -39,6 +39,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_MD2_ALT)
+
 static const unsigned char PI_SUBST[256] =
 {
     0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
@@ -163,6 +165,8 @@ void md2_finish( md2_context *ctx, unsigned char output[16] )
     memcpy( output, ctx->state, 16 );
 }
 
+#endif /* !POLARSSL_MD2_ALT */
+
 /*
  * output = MD2( input buffer )
  */

library/md4.c

@@ -1,7 +1,7 @@
 /*
  *  RFC 1186/1320 compliant MD4 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -39,6 +39,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_MD4_ALT)
+
 /*
  * 32-bit integer manipulation macros (little endian)
  */
@@ -259,6 +261,8 @@ void md4_finish( md4_context *ctx, unsigned char output[16] )
     PUT_UINT32_LE( ctx->state[3], output, 12 );
 }
 
+#endif /* !POLARSSL_MD4_ALT */
+
 /*
  * output = MD4( input buffer )
  */

library/md5.c

@@ -1,7 +1,7 @@
 /*
  *  RFC 1321 compliant MD5 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_MD5_ALT)
+
 /*
  * 32-bit integer manipulation macros (little endian)
  */
@@ -276,6 +278,8 @@ void md5_finish( md5_context *ctx, unsigned char output[16] )
     PUT_UINT32_LE( ctx->state[3], output, 12 );
 }
 
+#endif /* !POLARSSL_MD5_ALT */
+
 /*
  * output = MD5( input buffer )
  */

library/sha1.c

@@ -1,7 +1,7 @@
 /*
  *  FIPS-180-1 compliant SHA-1 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_SHA1_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -309,6 +311,8 @@ void sha1_finish( sha1_context *ctx, unsigned char output[20] )
     PUT_UINT32_BE( ctx->state[4], output, 16 );
 }
 
+#endif /* !POLARSSL_SHA1_ALT */
+
 /*
  * output = SHA-1( input buffer )
  */

library/sha2.c

@@ -1,7 +1,7 @@
 /*
  *  FIPS-180-2 compliant SHA-256 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_SHA2_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -310,6 +312,8 @@ void sha2_finish( sha2_context *ctx, unsigned char output[32] )
         PUT_UINT32_BE( ctx->state[7], output, 28 );
 }
 
+#endif /* !POLARSSL_SHA2_ALT */
+
 /*
  * output = SHA-256( input buffer )
  */

library/sha4.c

@@ -1,7 +1,7 @@
 /*
  *  FIPS-180-2 compliant SHA-384/512 implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include <stdio.h>
 #endif
 
+#if !defined(POLARSSL_SHA4_ALT)
+
 /*
  * 64-bit integer manipulation macros (big endian)
  */
@@ -308,6 +310,8 @@ void sha4_finish( sha4_context *ctx, unsigned char output[64] )
     }
 }
 
+#endif /* !POLARSSL_SHA4_ALT */
+
 /*
  * output = SHA-512( input buffer )
  */

library/ssl_tls.c

@@ -2290,11 +2290,15 @@ static void ssl_calc_finished_ssl(
      *         SHA1( handshake + sender + master + pad1 ) )
      */
 
+#if !defined(POLARSSL_MD5_ALT)
     SSL_DEBUG_BUF( 4, "finished  md5 state", (unsigned char *)
                     md5.state, sizeof(  md5.state ) );
+#endif
 
+#if !defined(POLARSSL_SHA1_ALT)
     SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
                    sha1.state, sizeof( sha1.state ) );
+#endif
 
     sender = ( from == SSL_IS_CLIENT ) ? "CLNT"
                                        : "SRVR";
@@ -2361,11 +2365,15 @@ static void ssl_calc_finished_tls(
      *               MD5( handshake ) + SHA1( handshake ) )[0..11]
      */
 
+#if !defined(POLARSSL_MD5_ALT)
     SSL_DEBUG_BUF( 4, "finished  md5 state", (unsigned char *)
                     md5.state, sizeof(  md5.state ) );
+#endif
 
+#if !defined(POLARSSL_SHA1_ALT)
     SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
                    sha1.state, sizeof( sha1.state ) );
+#endif
 
     sender = ( from == SSL_IS_CLIENT )
              ? "client finished"
@@ -2409,8 +2417,10 @@ static void ssl_calc_finished_tls_sha256(
      *               Hash( handshake ) )[0.11]
      */
 
+#if !defined(POLARSSL_SHA2_ALT)
     SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
                    sha2.state, sizeof( sha2.state ) );
+#endif
 
     sender = ( from == SSL_IS_CLIENT )
              ? "client finished"
@@ -2453,8 +2463,10 @@ static void ssl_calc_finished_tls_sha384(
      *               Hash( handshake ) )[0.11]
      */
 
+#if !defined(POLARSSL_SHA4_ALT)
     SSL_DEBUG_BUF( 4, "finished sha4 state", (unsigned char *)
                    sha4.state, sizeof( sha4.state ) );
+#endif
 
     sender = ( from == SSL_IS_CLIENT )
              ? "client finished"

library/xtea.c

@@ -1,7 +1,7 @@
 /*
  *  An 32-bit implementation of the XTEA algorithm
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -29,6 +29,8 @@
 
 #include "polarssl/xtea.h"
 
+#if !defined(POLARSSL_XTEA_ALT)
+
 /*
  * 32-bit integer manipulation macros (big endian)
  */
@@ -160,6 +162,7 @@ int xtea_crypt_cbc( xtea_context *ctx,
 
     return( 0 );
 }
+#endif /* !POLARSSL_XTEA_ALT */
 
 #if defined(POLARSSL_SELF_TEST)