crypto/krb5/rfc3961_simplified.c

256  * DR(Key, Constant) = k-truncate(E(Key, Constant, initial-cipher-state))
257  * K1 = E(Key, n-fold(Constant), initial-cipher-state)
258  * K2 = E(Key, K1, initial-cipher-state)
259  * K3 = E(Key, K2, initial-cipher-state)
272 	struct crypto_sync_skcipher *cipher;
284 	cipher = crypto_alloc_sync_skcipher(krb5->derivation_enc, 0, 0);
285 	if (IS_ERR(cipher)) {
286 		ret = (PTR_ERR(cipher) == -ENOENT) ? -ENOPKG : PTR_ERR(cipher);
289 	ret = crypto_sync_skcipher_setkey(cipher, inkey->data, inkey->len);
314 		rfc3961_do_encrypt(cipher, NULL, &inblock, &outblock);
337 	crypto_free_sync_skcipher(cipher);
353 	struct crypto_sync_skcipher *cipher;
356 	cipher = crypto_alloc_sync_skcipher(krb5->derivation_enc, 0, 0);
357 	if (IS_ERR(cipher)) {
358 		ret = (PTR_ERR(cipher) == -ENOENT) ? -ENOPKG : PTR_ERR(cipher);
362 	ret = crypto_sync_skcipher_setkey(cipher, key->data, key->len);
366 	ret = rfc3961_do_encrypt(cipher, NULL, in_data, result);
369 	crypto_free_sync_skcipher(cipher);
379  *      PRF = E(DK(protocol-key, prfconstant), tmp2, initial-cipher-state)