int
setkey(const char *key)
{
int i, j;
u_int32_t packed_keys[2];
u_char *p;
p = (u_char *) packed_keys;
for (i = 0; i < 8; i++) {
p[i] = 0;
for (j = 0; j < 8; j++)
if (*key++ & 1)
p[i] |= _des_bits8[j];
}
return(des_setkey((char *)p));
}
Gc_rc
gc_cipher_setkey (gc_cipher_handle handle, size_t keylen, const char *key)
{
_gc_cipher_ctx *ctx = handle;
switch (ctx->alg)
{
#ifdef GC_USE_ARCTWO
case GC_ARCTWO40:
arctwo_setkey (&ctx->arctwoContext, keylen, key);
break;
#endif
#ifdef GC_USE_ARCFOUR
case GC_ARCFOUR128:
case GC_ARCFOUR40:
arcfour_setkey (&ctx->arcfourContext, key, keylen);
break;
#endif
#ifdef GC_USE_DES
case GC_DES:
if (keylen != 8)
return GC_INVALID_CIPHER;
des_setkey (&ctx->desContext, key);
break;
#endif
#ifdef GC_USE_RIJNDAEL
case GC_AES128:
case GC_AES192:
case GC_AES256:
{
rijndael_rc rc;
size_t i;
char keyMaterial[RIJNDAEL_MAX_KEY_SIZE + 1];
for (i = 0; i < keylen; i++)
sprintf (&keyMaterial[2*i], "%02x", key[i] & 0xFF);
rc = rijndaelMakeKey (&ctx->aesEncKey, RIJNDAEL_DIR_ENCRYPT,
keylen * 8, keyMaterial);
if (rc < 0)
return GC_INVALID_CIPHER;
rc = rijndaelMakeKey (&ctx->aesDecKey, RIJNDAEL_DIR_DECRYPT,
keylen * 8, keyMaterial);
if (rc < 0)
return GC_INVALID_CIPHER;
rc = rijndaelCipherInit (&ctx->aesContext, RIJNDAEL_MODE_ECB, NULL);
if (rc < 0)
return GC_INVALID_CIPHER;
}
break;
#endif
default:
return GC_INVALID_CIPHER;
}
return GC_OK;
}
