/* AES_CreateContext
*
* create a new context for Rijndael operations
*/
AESContext *
AES_CreateContext(const unsigned char *key, const unsigned char *iv,
int mode, int encrypt,
unsigned int keysize, unsigned int blocksize)
{
AESContext *cx = AES_AllocateContext();
if (cx) {
SECStatus rv = AES_InitContext(cx, key, keysize, iv, mode, encrypt,
blocksize);
if (rv != SECSuccess) {
AES_DestroyContext(cx, PR_TRUE);
cx = NULL;
}
}
return cx;
}
SECStatus
AESKeyWrap_InitContext(AESKeyWrapContext *cx,
const unsigned char *key,
unsigned int keylen,
const unsigned char *iv,
int x1,
unsigned int encrypt,
unsigned int x2)
{
SECStatus rv = SECFailure;
if (!cx) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
if (iv) {
memcpy(cx->iv, iv, sizeof cx->iv);
} else {
memset(cx->iv, 0xA6, sizeof cx->iv);
}
rv = AES_InitContext(&cx->aescx, key, keylen, NULL, NSS_AES, encrypt,
AES_BLOCK_SIZE);
return rv;
}
