зеркало из https://github.com/mozilla/gecko-dev.git
482 строки
16 KiB
C++
482 строки
16 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsSyncJPAKE.h"
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#include "mozilla/ModuleUtils.h"
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#include <pk11pub.h>
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#include <keyhi.h>
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#include <pkcs11.h>
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#include <nscore.h>
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#include <secmodt.h>
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#include <secport.h>
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#include <secerr.h>
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#include <nsDebug.h>
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#include <nsError.h>
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#include <base64.h>
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#include <nsString.h>
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using mozilla::fallible;
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static bool
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hex_from_2char(const unsigned char *c2, unsigned char *byteval)
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{
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int i;
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unsigned char offset;
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*byteval = 0;
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for (i=0; i<2; i++) {
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if (c2[i] >= '0' && c2[i] <= '9') {
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offset = c2[i] - '0';
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*byteval |= offset << 4*(1-i);
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} else if (c2[i] >= 'a' && c2[i] <= 'f') {
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offset = c2[i] - 'a';
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*byteval |= (offset + 10) << 4*(1-i);
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} else if (c2[i] >= 'A' && c2[i] <= 'F') {
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offset = c2[i] - 'A';
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*byteval |= (offset + 10) << 4*(1-i);
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} else {
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return false;
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}
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}
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return true;
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}
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static bool
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fromHex(const char * str, unsigned char * p, size_t sLen)
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{
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size_t i;
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if (sLen & 1)
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return false;
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for (i = 0; i < sLen / 2; ++i) {
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if (!hex_from_2char((const unsigned char *) str + (2*i),
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(unsigned char *) p + i)) {
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return false;
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}
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}
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return true;
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}
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static nsresult
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fromHexString(const nsACString & str, unsigned char * p, size_t pMaxLen)
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{
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char * strData = (char *) str.Data();
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unsigned len = str.Length();
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NS_ENSURE_ARG(len / 2 <= pMaxLen);
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if (!fromHex(strData, p, len)) {
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return NS_ERROR_INVALID_ARG;
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}
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return NS_OK;
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}
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static bool
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toHexString(const unsigned char * str, unsigned len, nsACString & out)
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{
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static const char digits[] = "0123456789ABCDEF";
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if (!out.SetCapacity(2 * len, fallible))
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return false;
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out.SetLength(0);
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for (unsigned i = 0; i < len; ++i) {
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out.Append(digits[str[i] >> 4]);
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out.Append(digits[str[i] & 0x0f]);
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}
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return true;
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}
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static nsresult
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mapErrno()
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{
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int err = PORT_GetError();
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switch (err) {
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case SEC_ERROR_NO_MEMORY: return NS_ERROR_OUT_OF_MEMORY;
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default: return NS_ERROR_UNEXPECTED;
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}
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}
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#define NUM_ELEM(x) (sizeof(x) / sizeof (x)[0])
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static const char p[] =
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"90066455B5CFC38F9CAA4A48B4281F292C260FEEF01FD61037E56258A7795A1C"
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"7AD46076982CE6BB956936C6AB4DCFE05E6784586940CA544B9B2140E1EB523F"
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"009D20A7E7880E4E5BFA690F1B9004A27811CD9904AF70420EEFD6EA11EF7DA1"
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"29F58835FF56B89FAA637BC9AC2EFAAB903402229F491D8D3485261CD068699B"
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"6BA58A1DDBBEF6DB51E8FE34E8A78E542D7BA351C21EA8D8F1D29F5D5D159394"
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"87E27F4416B0CA632C59EFD1B1EB66511A5A0FBF615B766C5862D0BD8A3FE7A0"
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"E0DA0FB2FE1FCB19E8F9996A8EA0FCCDE538175238FC8B0EE6F29AF7F642773E"
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"BE8CD5402415A01451A840476B2FCEB0E388D30D4B376C37FE401C2A2C2F941D"
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"AD179C540C1C8CE030D460C4D983BE9AB0B20F69144C1AE13F9383EA1C08504F"
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"B0BF321503EFE43488310DD8DC77EC5B8349B8BFE97C2C560EA878DE87C11E3D"
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"597F1FEA742D73EEC7F37BE43949EF1A0D15C3F3E3FC0A8335617055AC91328E"
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"C22B50FC15B941D3D1624CD88BC25F3E941FDDC6200689581BFEC416B4B2CB73";
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static const char q[] =
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"CFA0478A54717B08CE64805B76E5B14249A77A4838469DF7F7DC987EFCCFB11D";
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static const char g[] =
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"5E5CBA992E0A680D885EB903AEA78E4A45A469103D448EDE3B7ACCC54D521E37"
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"F84A4BDD5B06B0970CC2D2BBB715F7B82846F9A0C393914C792E6A923E2117AB"
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"805276A975AADB5261D91673EA9AAFFEECBFA6183DFCB5D3B7332AA19275AFA1"
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"F8EC0B60FB6F66CC23AE4870791D5982AAD1AA9485FD8F4A60126FEB2CF05DB8"
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"A7F0F09B3397F3937F2E90B9E5B9C9B6EFEF642BC48351C46FB171B9BFA9EF17"
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"A961CE96C7E7A7CC3D3D03DFAD1078BA21DA425198F07D2481622BCE45969D9C"
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"4D6063D72AB7A0F08B2F49A7CC6AF335E08C4720E31476B67299E231F8BD90B3"
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"9AC3AE3BE0C6B6CACEF8289A2E2873D58E51E029CAFBD55E6841489AB66B5B4B"
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"9BA6E2F784660896AFF387D92844CCB8B69475496DE19DA2E58259B090489AC8"
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"E62363CDF82CFD8EF2A427ABCD65750B506F56DDE3B988567A88126B914D7828"
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"E2B63A6D7ED0747EC59E0E0A23CE7D8A74C1D2C2A7AFB6A29799620F00E11C33"
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"787F7DED3B30E1A22D09F1FBDA1ABBBFBF25CAE05A13F812E34563F99410E73B";
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NS_IMETHODIMP nsSyncJPAKE::Round1(const nsACString & aSignerID,
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nsACString & aGX1,
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nsACString & aGV1,
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nsACString & aR1,
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nsACString & aGX2,
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nsACString & aGV2,
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nsACString & aR2)
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{
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nsNSSShutDownPreventionLock locker;
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if (isAlreadyShutDown()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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NS_ENSURE_STATE(round == JPAKENotStarted);
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NS_ENSURE_STATE(key == nullptr);
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static CK_MECHANISM_TYPE mechanisms[] = {
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CKM_NSS_JPAKE_ROUND1_SHA256,
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CKM_NSS_JPAKE_ROUND2_SHA256,
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CKM_NSS_JPAKE_FINAL_SHA256
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};
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ScopedPK11SlotInfo slot(PK11_GetBestSlotMultiple(mechanisms,
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NUM_ELEM(mechanisms),
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nullptr));
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NS_ENSURE_STATE(slot != nullptr);
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CK_BYTE pBuf[(NUM_ELEM(p) - 1) / 2];
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CK_BYTE qBuf[(NUM_ELEM(q) - 1) / 2];
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CK_BYTE gBuf[(NUM_ELEM(g) - 1) / 2];
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CK_KEY_TYPE keyType = CKK_NSS_JPAKE_ROUND1;
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NS_ENSURE_STATE(fromHex(p, pBuf, (NUM_ELEM(p) - 1)));
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NS_ENSURE_STATE(fromHex(q, qBuf, (NUM_ELEM(q) - 1)));
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NS_ENSURE_STATE(fromHex(g, gBuf, (NUM_ELEM(g) - 1)));
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CK_ATTRIBUTE keyTemplate[] = {
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{ CKA_NSS_JPAKE_SIGNERID, (CK_BYTE *) aSignerID.Data(),
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aSignerID.Length() },
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{ CKA_KEY_TYPE, &keyType, sizeof keyType },
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{ CKA_PRIME, pBuf, sizeof pBuf },
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{ CKA_SUBPRIME, qBuf, sizeof qBuf },
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{ CKA_BASE, gBuf, sizeof gBuf }
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};
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CK_BYTE gx1Buf[NUM_ELEM(p) / 2];
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CK_BYTE gv1Buf[NUM_ELEM(p) / 2];
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CK_BYTE r1Buf [NUM_ELEM(p) / 2];
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CK_BYTE gx2Buf[NUM_ELEM(p) / 2];
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CK_BYTE gv2Buf[NUM_ELEM(p) / 2];
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CK_BYTE r2Buf [NUM_ELEM(p) / 2];
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CK_NSS_JPAKERound1Params rp = {
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{ gx1Buf, sizeof gx1Buf, gv1Buf, sizeof gv1Buf, r1Buf, sizeof r1Buf },
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{ gx2Buf, sizeof gx2Buf, gv2Buf, sizeof gv2Buf, r2Buf, sizeof r2Buf }
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};
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SECItem paramsItem;
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paramsItem.data = (unsigned char *) &rp;
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paramsItem.len = sizeof rp;
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key = PK11_KeyGenWithTemplate(slot, CKM_NSS_JPAKE_ROUND1_SHA256,
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CKM_NSS_JPAKE_ROUND1_SHA256,
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¶msItem, keyTemplate,
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NUM_ELEM(keyTemplate), nullptr);
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nsresult rv = key != nullptr
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? NS_OK
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: mapErrno();
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if (rv == NS_OK) {
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NS_ENSURE_TRUE(toHexString(rp.gx1.pGX, rp.gx1.ulGXLen, aGX1) &&
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toHexString(rp.gx1.pGV, rp.gx1.ulGVLen, aGV1) &&
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toHexString(rp.gx1.pR, rp.gx1.ulRLen, aR1) &&
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toHexString(rp.gx2.pGX, rp.gx2.ulGXLen, aGX2) &&
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toHexString(rp.gx2.pGV, rp.gx2.ulGVLen, aGV2) &&
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toHexString(rp.gx2.pR, rp.gx2.ulRLen, aR2),
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NS_ERROR_OUT_OF_MEMORY);
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round = JPAKEBeforeRound2;
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}
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return rv;
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}
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NS_IMETHODIMP nsSyncJPAKE::Round2(const nsACString & aPeerID,
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const nsACString & aPIN,
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const nsACString & aGX3,
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const nsACString & aGV3,
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const nsACString & aR3,
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const nsACString & aGX4,
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const nsACString & aGV4,
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const nsACString & aR4,
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nsACString & aA,
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nsACString & aGVA,
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nsACString & aRA)
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{
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nsNSSShutDownPreventionLock locker;
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if (isAlreadyShutDown()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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NS_ENSURE_STATE(round == JPAKEBeforeRound2);
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NS_ENSURE_STATE(key != nullptr);
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NS_ENSURE_ARG(!aPeerID.IsEmpty());
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/* PIN cannot be equal to zero when converted to a bignum. NSS 3.12.9 J-PAKE
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assumes that the caller has already done this check. Future versions of
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NSS J-PAKE will do this check internally. See Bug 609068 Comment 4 */
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bool foundNonZero = false;
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for (size_t i = 0; i < aPIN.Length(); ++i) {
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if (aPIN[i] != 0) {
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foundNonZero = true;
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break;
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}
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}
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NS_ENSURE_ARG(foundNonZero);
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CK_BYTE gx3Buf[NUM_ELEM(p)/2], gv3Buf[NUM_ELEM(p)/2], r3Buf [NUM_ELEM(p)/2];
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CK_BYTE gx4Buf[NUM_ELEM(p)/2], gv4Buf[NUM_ELEM(p)/2], r4Buf [NUM_ELEM(p)/2];
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CK_BYTE gxABuf[NUM_ELEM(p)/2], gvABuf[NUM_ELEM(p)/2], rABuf [NUM_ELEM(p)/2];
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nsresult rv = fromHexString(aGX3, gx3Buf, sizeof gx3Buf);
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if (rv == NS_OK) rv = fromHexString(aGV3, gv3Buf, sizeof gv3Buf);
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if (rv == NS_OK) rv = fromHexString(aR3, r3Buf, sizeof r3Buf);
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if (rv == NS_OK) rv = fromHexString(aGX4, gx4Buf, sizeof gx4Buf);
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if (rv == NS_OK) rv = fromHexString(aGV4, gv4Buf, sizeof gv4Buf);
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if (rv == NS_OK) rv = fromHexString(aR4, r4Buf, sizeof r4Buf);
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if (rv != NS_OK)
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return rv;
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CK_NSS_JPAKERound2Params rp;
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rp.pSharedKey = (CK_BYTE *) aPIN.Data();
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rp.ulSharedKeyLen = aPIN.Length();
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rp.gx3.pGX = gx3Buf; rp.gx3.ulGXLen = aGX3.Length() / 2;
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rp.gx3.pGV = gv3Buf; rp.gx3.ulGVLen = aGV3.Length() / 2;
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rp.gx3.pR = r3Buf; rp.gx3.ulRLen = aR3 .Length() / 2;
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rp.gx4.pGX = gx4Buf; rp.gx4.ulGXLen = aGX4.Length() / 2;
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rp.gx4.pGV = gv4Buf; rp.gx4.ulGVLen = aGV4.Length() / 2;
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rp.gx4.pR = r4Buf; rp.gx4.ulRLen = aR4 .Length() / 2;
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rp.A.pGX = gxABuf; rp.A .ulGXLen = sizeof gxABuf;
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rp.A.pGV = gvABuf; rp.A .ulGVLen = sizeof gxABuf;
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rp.A.pR = rABuf; rp.A .ulRLen = sizeof gxABuf;
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// Bug 629090: NSS 3.12.9 J-PAKE fails to check that gx^4 != 1, so check here.
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bool gx4Good = false;
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for (unsigned i = 0; i < rp.gx4.ulGXLen; ++i) {
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if (rp.gx4.pGX[i] > 1 || (rp.gx4.pGX[i] != 0 && i < rp.gx4.ulGXLen - 1)) {
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gx4Good = true;
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break;
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}
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}
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NS_ENSURE_ARG(gx4Good);
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SECItem paramsItem;
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paramsItem.data = (unsigned char *) &rp;
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paramsItem.len = sizeof rp;
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CK_KEY_TYPE keyType = CKK_NSS_JPAKE_ROUND2;
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CK_ATTRIBUTE keyTemplate[] = {
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{ CKA_NSS_JPAKE_PEERID, (CK_BYTE *) aPeerID.Data(), aPeerID.Length(), },
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{ CKA_KEY_TYPE, &keyType, sizeof keyType }
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};
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ScopedPK11SymKey newKey(PK11_DeriveWithTemplate(key,
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CKM_NSS_JPAKE_ROUND2_SHA256,
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¶msItem,
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CKM_NSS_JPAKE_FINAL_SHA256,
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CKA_DERIVE, 0,
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keyTemplate,
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NUM_ELEM(keyTemplate),
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false));
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if (newKey != nullptr) {
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if (toHexString(rp.A.pGX, rp.A.ulGXLen, aA) &&
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toHexString(rp.A.pGV, rp.A.ulGVLen, aGVA) &&
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toHexString(rp.A.pR, rp.A.ulRLen, aRA)) {
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round = JPAKEAfterRound2;
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key = newKey.forget();
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return NS_OK;
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} else {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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} else {
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rv = mapErrno();
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}
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return rv;
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}
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static nsresult
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setBase64(const unsigned char * data, unsigned len, nsACString & out)
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{
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nsresult rv = NS_OK;
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const char * base64 = BTOA_DataToAscii(data, len);
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if (base64 != nullptr) {
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size_t len = PORT_Strlen(base64);
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if (out.SetCapacity(len, fallible)) {
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out.SetLength(0);
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out.Append(base64, len);
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} else {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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PORT_Free((void*) base64);
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} else {
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rv = NS_ERROR_OUT_OF_MEMORY;
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}
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return rv;
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}
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static nsresult
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base64KeyValue(PK11SymKey * key, nsACString & keyString)
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{
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nsresult rv = NS_OK;
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if (PK11_ExtractKeyValue(key) == SECSuccess) {
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const SECItem * value = PK11_GetKeyData(key);
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rv = value != nullptr && value->data != nullptr && value->len > 0
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? setBase64(value->data, value->len, keyString)
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: NS_ERROR_UNEXPECTED;
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} else {
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rv = mapErrno();
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}
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return rv;
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}
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static nsresult
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extractBase64KeyValue(PK11SymKey * keyBlock, CK_ULONG bitPosition,
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CK_MECHANISM_TYPE destMech, int keySize,
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nsACString & keyString)
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{
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SECItem paramsItem;
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paramsItem.data = (CK_BYTE *) &bitPosition;
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paramsItem.len = sizeof bitPosition;
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PK11SymKey * key = PK11_Derive(keyBlock, CKM_EXTRACT_KEY_FROM_KEY,
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¶msItem, destMech,
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CKA_SIGN, keySize);
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if (key == nullptr)
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return mapErrno();
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nsresult rv = base64KeyValue(key, keyString);
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PK11_FreeSymKey(key);
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return rv;
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}
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NS_IMETHODIMP nsSyncJPAKE::Final(const nsACString & aB,
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const nsACString & aGVB,
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const nsACString & aRB,
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const nsACString & aHKDFInfo,
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nsACString & aAES256Key,
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nsACString & aHMAC256Key)
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{
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nsNSSShutDownPreventionLock locker;
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if (isAlreadyShutDown()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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static const unsigned AES256_KEY_SIZE = 256 / 8;
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static const unsigned HMAC_SHA256_KEY_SIZE = 256 / 8;
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CK_EXTRACT_PARAMS aesBitPosition = 0;
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CK_EXTRACT_PARAMS hmacBitPosition = aesBitPosition + (AES256_KEY_SIZE * 8);
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NS_ENSURE_STATE(round == JPAKEAfterRound2);
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NS_ENSURE_STATE(key != nullptr);
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CK_BYTE gxBBuf[NUM_ELEM(p)/2], gvBBuf[NUM_ELEM(p)/2], rBBuf [NUM_ELEM(p)/2];
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nsresult rv = fromHexString(aB, gxBBuf, sizeof gxBBuf);
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if (rv == NS_OK) rv = fromHexString(aGVB, gvBBuf, sizeof gvBBuf);
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if (rv == NS_OK) rv = fromHexString(aRB, rBBuf, sizeof rBBuf);
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if (rv != NS_OK)
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return rv;
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CK_NSS_JPAKEFinalParams rp;
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rp.B.pGX = gxBBuf; rp.B.ulGXLen = aB .Length() / 2;
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rp.B.pGV = gvBBuf; rp.B.ulGVLen = aGVB.Length() / 2;
|
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rp.B.pR = rBBuf; rp.B.ulRLen = aRB .Length() / 2;
|
|
SECItem paramsItem;
|
|
paramsItem.data = (unsigned char *) &rp;
|
|
paramsItem.len = sizeof rp;
|
|
ScopedPK11SymKey keyMaterial(PK11_Derive(key, CKM_NSS_JPAKE_FINAL_SHA256,
|
|
¶msItem, CKM_NSS_HKDF_SHA256,
|
|
CKA_DERIVE, 0));
|
|
ScopedPK11SymKey keyBlock;
|
|
|
|
if (keyMaterial == nullptr)
|
|
rv = mapErrno();
|
|
|
|
if (rv == NS_OK) {
|
|
CK_NSS_HKDFParams hkdfParams;
|
|
hkdfParams.bExtract = CK_TRUE;
|
|
hkdfParams.pSalt = nullptr;
|
|
hkdfParams.ulSaltLen = 0;
|
|
hkdfParams.bExpand = CK_TRUE;
|
|
hkdfParams.pInfo = (CK_BYTE *) aHKDFInfo.Data();
|
|
hkdfParams.ulInfoLen = aHKDFInfo.Length();
|
|
paramsItem.data = (unsigned char *) &hkdfParams;
|
|
paramsItem.len = sizeof hkdfParams;
|
|
keyBlock = PK11_Derive(keyMaterial, CKM_NSS_HKDF_SHA256,
|
|
¶msItem, CKM_EXTRACT_KEY_FROM_KEY,
|
|
CKA_DERIVE, AES256_KEY_SIZE + HMAC_SHA256_KEY_SIZE);
|
|
if (keyBlock == nullptr)
|
|
rv = mapErrno();
|
|
}
|
|
|
|
if (rv == NS_OK) {
|
|
rv = extractBase64KeyValue(keyBlock, aesBitPosition, CKM_AES_CBC,
|
|
AES256_KEY_SIZE, aAES256Key);
|
|
}
|
|
if (rv == NS_OK) {
|
|
rv = extractBase64KeyValue(keyBlock, hmacBitPosition, CKM_SHA256_HMAC,
|
|
HMAC_SHA256_KEY_SIZE, aHMAC256Key);
|
|
}
|
|
|
|
if (rv == NS_OK) {
|
|
SECStatus srv = PK11_ExtractKeyValue(keyMaterial);
|
|
NS_ENSURE_TRUE(srv == SECSuccess, NS_ERROR_UNEXPECTED);
|
|
SECItem * keyMaterialBytes = PK11_GetKeyData(keyMaterial);
|
|
NS_ENSURE_TRUE(keyMaterialBytes != nullptr, NS_ERROR_UNEXPECTED);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_GENERIC_FACTORY_CONSTRUCTOR(nsSyncJPAKE)
|
|
NS_DEFINE_NAMED_CID(NS_SYNCJPAKE_CID);
|
|
|
|
nsSyncJPAKE::nsSyncJPAKE() : round(JPAKENotStarted), key(nullptr) { }
|
|
|
|
nsSyncJPAKE::~nsSyncJPAKE()
|
|
{
|
|
nsNSSShutDownPreventionLock locker;
|
|
if (isAlreadyShutDown()) {
|
|
return;
|
|
}
|
|
destructorSafeDestroyNSSReference();
|
|
shutdown(calledFromObject);
|
|
}
|
|
|
|
void
|
|
nsSyncJPAKE::virtualDestroyNSSReference()
|
|
{
|
|
destructorSafeDestroyNSSReference();
|
|
}
|
|
|
|
void
|
|
nsSyncJPAKE::destructorSafeDestroyNSSReference()
|
|
{
|
|
key.dispose();
|
|
}
|
|
|
|
static const mozilla::Module::CIDEntry kServicesCryptoCIDs[] = {
|
|
{ &kNS_SYNCJPAKE_CID, false, nullptr, nsSyncJPAKEConstructor },
|
|
{ nullptr }
|
|
};
|
|
|
|
static const mozilla::Module::ContractIDEntry kServicesCryptoContracts[] = {
|
|
{ NS_SYNCJPAKE_CONTRACTID, &kNS_SYNCJPAKE_CID },
|
|
{ nullptr }
|
|
};
|
|
|
|
static const mozilla::Module kServicesCryptoModule = {
|
|
mozilla::Module::kVersion,
|
|
kServicesCryptoCIDs,
|
|
kServicesCryptoContracts
|
|
};
|
|
|
|
NSMODULE_DEFN(nsServicesCryptoModule) = &kServicesCryptoModule;
|