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Sicherung

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This commit is contained in:
Werner Koch 1998-06-09 15:14:06 +00:00
parent ef75fa1802
commit 1ece02aa54
33 changed files with 704 additions and 766 deletions
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56
cipher/blowfish.c
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@ -38,6 +38,28 @@
#include "types.h"
#include "blowfish.h"
#define CIPHER_ALGO_BLOWFISH 4 /* blowfish 128 bit key */
#define CIPHER_ALGO_BLOWFISH160 42 /* blowfish 160 bit key (not in OpenPGP)*/
#define FNCCAST_SETKEY(f) (void(*)(void*, byte*, unsigned))(f)
#define FNCCAST_CRYPT(f) (void(*)(void*, byte*, byte*))(f)
#define BLOWFISH_BLOCKSIZE 8
#define BLOWFISH_ROUNDS 16
typedef struct {
u32 s0[256];
u32 s1[256];
u32 s2[256];
u32 s3[256];
u32 p[BLOWFISH_ROUNDS+2];
} BLOWFISH_context;
static void blowfish_setkey( BLOWFISH_context *c, byte *key, unsigned keylen );
static void blowfish_encrypt_block( BLOWFISH_context *bc, byte *outbuf, byte *inbuf );
static void blowfish_decrypt_block( BLOWFISH_context *bc, byte *outbuf, byte *inbuf );
/* precomputed S boxes */
static const u32 ks0[256] = {
0xD1310BA6,0x98DFB5AC,0x2FFD72DB,0xD01ADFB7,0xB8E1AFED,0x6A267E96,
@ -391,7 +413,7 @@ decrypt( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr )
#undef F
#undef R
void
static void
blowfish_encrypt_block( BLOWFISH_context *bc, byte *outbuf, byte *inbuf )
{
u32 d1, d2;
@ -410,7 +432,7 @@ blowfish_encrypt_block( BLOWFISH_context *bc, byte *outbuf, byte *inbuf )
}
void
static void
blowfish_decrypt_block( BLOWFISH_context *bc, byte *outbuf, byte *inbuf )
{
u32 d1, d2;
@ -458,7 +480,7 @@ selftest()
void
static void
blowfish_setkey( BLOWFISH_context *c, byte *key, unsigned keylen )
{
int i, j;
@ -524,3 +546,31 @@ blowfish_setkey( BLOWFISH_context *c, byte *key, unsigned keylen )
}
/****************
* Return some information about the algorithm. We need algo here to
* distinguish different flavors of the algorithm.
* Returns: A pointer to string describing the algorithm or NULL if
* the ALGO is invalid.
*/
const char *
blowfish_get_info( int algo, size_t *keylen,
size_t *blocksize, size_t *contextsize,
void (**setkey)( void *c, byte *key, unsigned keylen ),
void (**encrypt)( void *c, byte *outbuf, byte *inbuf ),
void (**decrypt)( void *c, byte *outbuf, byte *inbuf )
)
{
*keylen = algo == CIPHER_ALGO_BLOWFISH ? 128 : 160;
*blocksize = BLOWFISH_BLOCKSIZE;
*contextsize = sizeof(BLOWFISH_context);
*setkey = FNCCAST_SETKEY(blowfish_setkey);
*encrypt= FNCCAST_CRYPT(blowfish_encrypt_block);
*decrypt= FNCCAST_CRYPT(blowfish_decrypt_block);
if( algo == CIPHER_ALGO_BLOWFISH )
return "BLOWFISH";
if( algo == CIPHER_ALGO_BLOWFISH160 )
return "BLOWFISH160";
return NULL;
}