diff -ur libgcrypt-1.5.0/cipher/idea.c libgcrypt-1.5.0f/cipher/idea.c
--- libgcrypt-1.5.0/cipher/idea.c	2011-12-25 00:45:06.747113267 +0100
+++ libgcrypt-1.5.0f/cipher/idea.c	2011-12-25 00:45:18.393287816 +0100
@@ -89,6 +89,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+#include "g10lib.h"
+#include "types.h"
+#include "cipher.h"
 
 #if !defined(BIG_ENDIAN_HOST) && !defined(LITTLE_ENDIAN_HOST)
 /* Try to handle endianness if we didn't get it from config.h */
@@ -103,9 +106,6 @@
 #endif
 #endif
 
-typedef unsigned short u16; /* Note: Make sure this is a 16 bit type. */
-typedef unsigned long  u32; /* Note: Make sure this is a 32 bit type. */
-
 /* end configurable stuff */
 
 
@@ -116,8 +116,8 @@
 
 /* local stuff */
 
-#define FNCCAST_SETKEY(f)   ((int(*)(void*, unsigned char*, unsigned int))(f))
-#define FNCCAST_CRYPT(f) ((void(*)(void*, unsigned char*, unsigned char*))(f))
+#define FNCCAST_SETKEY(f)   ((int(*)(void*, byte*, unsigned int))(f))
+#define FNCCAST_CRYPT(f) ((void(*)(void*, byte*, byte*))(f))
 
 #define IDEA_KEYSIZE 16
 #define IDEA_BLOCKSIZE 8
@@ -131,11 +131,9 @@
 } IDEA_context;
 
 
-static int do_setkey( IDEA_context *c, unsigned char *key, unsigned keylen );
-static void encrypt_block( IDEA_context *bc, unsigned char *outbuf,
-                           unsigned char *inbuf );
-static void decrypt_block( IDEA_context *bc, unsigned char *outbuf,
-                           unsigned char *inbuf );
+static gcry_err_code_t do_setkey( void *data, const byte *key, unsigned keylen );
+static void encrypt_block( void *data, byte *outbuf, const byte *inbuf );
+static void decrypt_block( void *data, byte *outbuf, const byte *inbuf );
 static int selftest(int);
 
 
@@ -170,7 +168,7 @@
 
 
 static void
-expand_key( unsigned char *userkey, u16 *ek )
+expand_key( const byte *userkey, u16 *ek )
 {
     int i,j;
 
@@ -233,7 +231,7 @@
 
 
 static void
-cipher( unsigned char *outbuf, unsigned char *inbuf, u16 *key )
+cipher( byte *outbuf, const byte *inbuf, u16 *key )
 {
     u16 x1, x2, x3,x4, s2, s3;
     u16 *in, *out;
@@ -309,25 +307,28 @@
 }
 
 
-static int
-do_setkey( IDEA_context *c, unsigned char *key, unsigned keylen )
+static gcry_err_code_t
+do_setkey( void *data, const byte *key, unsigned keylen )
 {
+    IDEA_context *c = (IDEA_context*)data;
     assert(keylen == 16);
     c->have_dk = 0;
     expand_key( key, c->ek );
     invert_key( c->ek, c->dk );
-    return 0;
+    return GPG_ERR_NO_ERROR;
 }
 
 static void
-encrypt_block( IDEA_context *c, unsigned char *outbuf, unsigned char *inbuf )
+encrypt_block( void *data, byte *outbuf, const byte *inbuf )
 {
+    IDEA_context *c = (IDEA_context*)data;
     cipher( outbuf, inbuf, c->ek );
 }
 
 static void
-decrypt_block( IDEA_context *c, unsigned char *outbuf, unsigned char *inbuf )
+decrypt_block( void *data, byte *outbuf, const byte *inbuf )
 {
+    IDEA_context *c = (IDEA_context*)data;
     if( !c->have_dk ) {
        c->have_dk = 1;
        invert_key( c->ek, c->dk );
@@ -340,9 +341,9 @@
 selftest( int check_decrypt )
 {
 static struct {
-    unsigned char key[16];
-    unsigned char plain[8];
-    unsigned char cipher[8];
+    byte key[16];
+    byte plain[8];
+    byte cipher[8];
 } test_vectors[] = {
     { { 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00, 0x04,
 	0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, 0x08 },
@@ -390,7 +391,7 @@
       { 0xF5, 0xDB, 0x1A, 0xC4, 0x5E, 0x5E, 0xF9, 0xF9 } }
 };
     IDEA_context c;
-    unsigned char buffer[8];
+    byte buffer[8];
     int i;
 
     for(i=0; i < DIM(test_vectors); i++ ) {
@@ -425,12 +426,12 @@
 const char *
 idea_get_info( int algo, size_t *keylen,
                size_t *blocksize, size_t *contextsize,
-               int	(**r_setkey)( void *c, unsigned char *key,
+               int	(**r_setkey)( void *c, byte *key,
                                       unsigned keylen ),
-               void (**r_encrypt)( void *c, unsigned char *outbuf,
-                                   unsigned char *inbuf ),
-               void (**r_decrypt)( void *c, unsigned char *outbuf,
-                                   unsigned char *inbuf )
+               void (**r_encrypt)( void *c, byte *outbuf,
+                                   byte *inbuf ),
+               void (**r_decrypt)( void *c, byte *outbuf,
+                                   byte *inbuf )
                )
 {
     static int initialized = 0;
@@ -451,7 +452,22 @@
     return NULL;
 }
 
+static gcry_err_code_t idea_setkey(void *data, const byte *key, unsigned keylen)
+{
+    static int initialized = 0;
+    if(!initialized) { 
+	initialized = 1;
+	if (selftest(0) || selftest(1))
+	    return GPG_ERR_CIPHER_ALGO;
+    }
+    return do_setkey(data, key, keylen);
+}
 
+gcry_cipher_spec_t _gcry_cipher_spec_idea =
+{
+    "IDEA", NULL, NULL, 8, 128, sizeof (IDEA_context),
+    idea_setkey, encrypt_block, decrypt_block
+};
 
 const char * const gnupgext_version = "IDEA ($Revision: 1.11 $)";