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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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76
cipher/cast5.c
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@ -44,6 +44,26 @@
#include "types.h"
#include "cast5.h"
#define CIPHER_ALGO_CAST5 3
#define FNCCAST_SETKEY(f) (void(*)(void*, byte*, unsigned))(f)
#define FNCCAST_CRYPT(f) (void(*)(void*, byte*, byte*))(f)
#define CAST5_BLOCKSIZE 8
typedef struct {
u32 Km[16];
byte Kr[16];
} CAST5_context;
static void setkey( CAST5_context *c, byte *key, unsigned keylen );
static void encrypt_block( CAST5_context *bc, byte *outbuf, byte *inbuf );
static void decrypt_block( CAST5_context *bc, byte *outbuf, byte *inbuf );
static const u32 s1[256] = {
0x30fb40d4, 0x9fa0ff0b, 0x6beccd2f, 0x3f258c7a, 0x1e213f2f, 0x9c004dd3, 0x6003e540, 0xcf9fc949,
0xbfd4af27, 0x88bbbdb5, 0xe2034090, 0x98d09675, 0x6e63a0e0, 0x15c361d2, 0xc2e7661d, 0x22d4ff8e,
@ -338,8 +358,8 @@ rol(int n, u32 x)
#define F3(D,m,r) ( (I = ((m) - (D))), (I=rol((r),I)), \
(((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]) )
void
cast5_encrypt_block( CAST5_context *c, byte *outbuf, byte *inbuf )
static void
encrypt_block( CAST5_context *c, byte *outbuf, byte *inbuf )
{
u32 l, r, t;
u32 I; /* used by the Fx macros */
@ -392,8 +412,8 @@ cast5_encrypt_block( CAST5_context *c, byte *outbuf, byte *inbuf )
outbuf[7] = l & 0xff;
}
void
cast5_decrypt_block( CAST5_context *c, byte *outbuf, byte *inbuf )
static void
decrypt_block( CAST5_context *c, byte *outbuf, byte *inbuf )
{
u32 l, r, t;
u32 I;
@ -445,11 +465,11 @@ selftest()
byte cipher[8]= { 0x23, 0x8B, 0x4F, 0xE5, 0x84, 0x7E, 0x44, 0xB2 };
byte buffer[8];
cast5_setkey( &c, key, 16 );
cast5_encrypt_block( &c, buffer, plain );
setkey( &c, key, 16 );
encrypt_block( &c, buffer, plain );
if( memcmp( buffer, cipher, 8 ) )
log_error("wrong cast5-128 encryption\n");
cast5_decrypt_block( &c, buffer, buffer );
decrypt_block( &c, buffer, buffer );
if( memcmp( buffer, plain, 8 ) )
log_bug("cast5-128 failed\n");
@ -466,12 +486,12 @@ selftest()
0x80,0xAC,0x05,0xB8,0xE8,0x3D,0x69,0x6E };
for(i=0; i < 1000000; i++ ) {
cast5_setkey( &c, b0, 16 );
cast5_encrypt_block( &c, a0, a0 );
cast5_encrypt_block( &c, a0+8, a0+8 );
cast5_setkey( &c, a0, 16 );
cast5_encrypt_block( &c, b0, b0 );
cast5_encrypt_block( &c, b0+8, b0+8 );
setkey( &c, b0, 16 );
encrypt_block( &c, a0, a0 );
encrypt_block( &c, a0+8, a0+8 );
setkey( &c, a0, 16 );
encrypt_block( &c, b0, b0 );
encrypt_block( &c, b0+8, b0+8 );
}
if( memcmp( a0, a1, 16 ) || memcmp( b0, b1, 16 ) )
log_bug("cast5-128 maintenance test failed\n");
@ -529,8 +549,8 @@ key_schedule( u32 *x, u32 *z, u32 *k )
}
void
cast5_setkey( CAST5_context *c, byte *key, unsigned keylen )
static void
setkey( CAST5_context *c, byte *key, unsigned keylen )
{
static int initialized;
int i;
@ -565,3 +585,29 @@ cast5_setkey( CAST5_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 *
cast5_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 = 128;
*blocksize = CAST5_BLOCKSIZE;
*contextsize = sizeof(CAST5_context);
*setkey = FNCCAST_SETKEY(setkey);
*encrypt= FNCCAST_CRYPT(encrypt_block);
*decrypt= FNCCAST_CRYPT(decrypt_block);
if( algo == CIPHER_ALGO_CAST5 )
return "CAST5";
return NULL;
}