mirror of
https://gitlab.torproject.org/tpo/core/tor.git
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107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/* Copyright (c) 2001, Matej Pfajfar.
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* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file aes_nss.c
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* \brief Use NSS to implement AES_CTR.
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**/
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#include "orconfig.h"
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#include "lib/crypt_ops/aes.h"
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#include "lib/crypt_ops/crypto_nss_mgt.h"
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#include "lib/crypt_ops/crypto_util.h"
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#include "lib/log/util_bug.h"
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DISABLE_GCC_WARNING(strict-prototypes)
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#include <pk11pub.h>
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#include <secerr.h>
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ENABLE_GCC_WARNING(strict-prototypes)
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aes_cnt_cipher_t *
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aes_new_cipher(const uint8_t *key, const uint8_t *iv,
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int key_bits)
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{
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const CK_MECHANISM_TYPE ckm = CKM_AES_CTR;
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SECItem keyItem = { .type = siBuffer,
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.data = (unsigned char *)key,
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.len = (key_bits / 8) };
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CK_AES_CTR_PARAMS params;
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params.ulCounterBits = 128;
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memcpy(params.cb, iv, 16);
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SECItem ivItem = { .type = siBuffer,
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.data = (unsigned char *)¶ms,
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.len = sizeof(params) };
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PK11SlotInfo *slot = NULL;
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PK11SymKey *keyObj = NULL;
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SECItem *ivObj = NULL;
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PK11Context *result = NULL;
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slot = PK11_GetBestSlot(ckm, NULL);
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if (!slot)
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goto err;
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keyObj = PK11_ImportSymKey(slot, ckm, PK11_OriginUnwrap,
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CKA_ENCRYPT, &keyItem, NULL);
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if (!keyObj)
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goto err;
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ivObj = PK11_ParamFromIV(ckm, &ivItem);
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if (!ivObj)
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goto err;
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PORT_SetError(SEC_ERROR_IO);
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result = PK11_CreateContextBySymKey(ckm, CKA_ENCRYPT, keyObj, ivObj);
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err:
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memwipe(¶ms, 0, sizeof(params));
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if (ivObj)
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SECITEM_FreeItem(ivObj, PR_TRUE);
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if (keyObj)
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PK11_FreeSymKey(keyObj);
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if (slot)
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PK11_FreeSlot(slot);
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tor_assert(result);
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return (aes_cnt_cipher_t *)result;
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}
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void
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aes_cipher_free_(aes_cnt_cipher_t *cipher)
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{
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if (!cipher)
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return;
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PK11_DestroyContext((PK11Context*) cipher, PR_TRUE);
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}
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void
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aes_crypt_inplace(aes_cnt_cipher_t *cipher, char *data_, size_t len_)
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{
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tor_assert(len_ <= INT_MAX);
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SECStatus s;
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PK11Context *ctx = (PK11Context*)cipher;
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unsigned char *data = (unsigned char *)data_;
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int len = (int) len_;
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int result_len = 0;
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s = PK11_CipherOp(ctx, data, &result_len, len, data, len);
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tor_assert(s == SECSuccess);
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tor_assert(result_len == len);
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}
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int
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evaluate_evp_for_aes(int force_value)
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{
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(void)force_value;
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return 0;
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}
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int
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evaluate_ctr_for_aes(void)
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{
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return 0;
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}
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