mozilla-central/security/nss/lib/softoken/jpakesftk.c (file symbol)

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "seccomon.h"
#include "secerr.h"
#include "blapi.h"
#include "pkcs11i.h"
#include "softoken.h"
static CK_RV
jpake_mapStatus(SECStatus rv, CK_RV invalidArgsMapping)
{
int err;
if (rv == SECSuccess)
return CKR_OK;
err = PORT_GetError();
switch (err) {
/* XXX: SEC_ERROR_INVALID_ARGS might be caused by invalid template
parameters. */
case SEC_ERROR_INVALID_ARGS:
return invalidArgsMapping;
case SEC_ERROR_BAD_SIGNATURE:
return CKR_SIGNATURE_INVALID;
case SEC_ERROR_NO_MEMORY:
return CKR_HOST_MEMORY;
}
return CKR_FUNCTION_FAILED;
}
/* If key is not NULL then the gx value will be stored as an attribute with
the type given by the gxAttrType parameter. */
static CK_RV
jpake_Sign(PLArenaPool *arena, const PQGParams *pqg, HASH_HashType hashType,
const SECItem *signerID, const SECItem *x,
CK_NSS_JPAKEPublicValue *out)
{
SECItem gx, gv, r;
CK_RV crv;
PORT_Assert(arena != NULL);
gx.data = NULL;
gv.data = NULL;
r.data = NULL;
crv = jpake_mapStatus(JPAKE_Sign(arena, pqg, hashType, signerID, x, NULL,
NULL, &gx, &gv, &r),
CKR_MECHANISM_PARAM_INVALID);
if (crv == CKR_OK) {
if ((out->pGX != NULL && out->ulGXLen >= gx.len) &&
(out->pGV != NULL && out->ulGVLen >= gv.len) &&
(out->pR != NULL && out->ulRLen >= r.len)) {
PORT_Memcpy(out->pGX, gx.data, gx.len);
PORT_Memcpy(out->pGV, gv.data, gv.len);
PORT_Memcpy(out->pR, r.data, r.len);
out->ulGXLen = gx.len;
out->ulGVLen = gv.len;
out->ulRLen = r.len;
} else {
crv = CKR_MECHANISM_PARAM_INVALID;
}
}
return crv;
}
static CK_RV
jpake_Verify(PLArenaPool *arena, const PQGParams *pqg,
HASH_HashType hashType, const SECItem *signerID,
const CK_BYTE *peerIDData, CK_ULONG peerIDLen,
const CK_NSS_JPAKEPublicValue *publicValueIn)
{
SECItem peerID, gx, gv, r;
peerID.data = (unsigned char *)peerIDData;
peerID.len = peerIDLen;
gx.data = publicValueIn->pGX;
gx.len = publicValueIn->ulGXLen;
gv.data = publicValueIn->pGV;
gv.len = publicValueIn->ulGVLen;
r.data = publicValueIn->pR;
r.len = publicValueIn->ulRLen;
return jpake_mapStatus(JPAKE_Verify(arena, pqg, hashType, signerID, &peerID,
&gx, &gv, &r),
CKR_MECHANISM_PARAM_INVALID);
}
#define NUM_ELEM(x) (sizeof(x) / sizeof(x)[0])
/* If the template has the key type set, ensure that it was set to the correct
* value. If the template did not have the key type set, set it to the
* correct value.
*/
static CK_RV
jpake_enforceKeyType(SFTKObject *key, CK_KEY_TYPE keyType)
{
CK_RV crv;
SFTKAttribute *keyTypeAttr = sftk_FindAttribute(key, CKA_KEY_TYPE);
if (keyTypeAttr != NULL) {
crv = *(CK_KEY_TYPE *)keyTypeAttr->attrib.pValue == keyType
? CKR_OK
: CKR_TEMPLATE_INCONSISTENT;
sftk_FreeAttribute(keyTypeAttr);
} else {
crv = sftk_forceAttribute(key, CKA_KEY_TYPE, &keyType, sizeof keyType);
}
return crv;
}
static CK_RV
jpake_MultipleSecItem2Attribute(SFTKObject *key, const SFTKItemTemplate *attrs,
size_t attrsCount)
{
size_t i;
for (i = 0; i < attrsCount; ++i) {
CK_RV crv = sftk_forceAttribute(key, attrs[i].type, attrs[i].item->data,
attrs[i].item->len);
if (crv != CKR_OK)
return crv;
}
return CKR_OK;
}
CK_RV
jpake_Round1(HASH_HashType hashType, CK_NSS_JPAKERound1Params *params,
SFTKObject *key)
{
CK_RV crv;
PQGParams pqg;
PLArenaPool *arena;
SECItem signerID;
SFTKItemTemplate templateAttrs[] = {
{ CKA_PRIME, &pqg.prime },
{ CKA_SUBPRIME, &pqg.subPrime },
{ CKA_BASE, &pqg.base },
{ CKA_NSS_JPAKE_SIGNERID, &signerID }
};
SECItem x2, gx1, gx2;
const SFTKItemTemplate generatedAttrs[] = {
{ CKA_NSS_JPAKE_X2, &x2 },
{ CKA_NSS_JPAKE_GX1, &gx1 },
{ CKA_NSS_JPAKE_GX2, &gx2 },
};
SECItem x1;
PORT_Assert(params != NULL);
PORT_Assert(key != NULL);
arena = PORT_NewArena(NSS_SOFTOKEN_DEFAULT_CHUNKSIZE);
if (arena == NULL)
crv = CKR_HOST_MEMORY;
crv = sftk_MultipleAttribute2SecItem(arena, key, templateAttrs,
NUM_ELEM(templateAttrs));
if (crv == CKR_OK && (signerID.data == NULL || signerID.len == 0))
crv = CKR_TEMPLATE_INCOMPLETE;
/* generate x1, g^x1 and the proof of knowledge of x1 */
if (crv == CKR_OK) {
x1.data = NULL;
crv = jpake_mapStatus(DSA_NewRandom(arena, &pqg.subPrime, &x1),
CKR_TEMPLATE_INCONSISTENT);
}
if (crv == CKR_OK)
crv = jpake_Sign(arena, &pqg, hashType, &signerID, &x1, &params->gx1);
/* generate x2, g^x2 and the proof of knowledge of x2 */
if (crv == CKR_OK) {
x2.data = NULL;
crv = jpake_mapStatus(DSA_NewRandom(arena, &pqg.subPrime, &x2),
CKR_TEMPLATE_INCONSISTENT);
}
if (crv == CKR_OK)
crv = jpake_Sign(arena, &pqg, hashType, &signerID, &x2, &params->gx2);
/* Save the values needed for round 2 into CKA_VALUE */
if (crv == CKR_OK) {
gx1.data = params->gx1.pGX;
gx1.len = params->gx1.ulGXLen;
gx2.data = params->gx2.pGX;
gx2.len = params->gx2.ulGXLen;
crv = jpake_MultipleSecItem2Attribute(key, generatedAttrs,
NUM_ELEM(generatedAttrs));
}
PORT_FreeArena(arena, PR_TRUE);
return crv;
}
CK_RV
jpake_Round2(HASH_HashType hashType, CK_NSS_JPAKERound2Params *params,
SFTKObject *sourceKey, SFTKObject *key)
{
CK_RV crv;
PLArenaPool *arena;
PQGParams pqg;
SECItem signerID, x2, gx1, gx2;
SFTKItemTemplate sourceAttrs[] = {
{ CKA_PRIME, &pqg.prime },
{ CKA_SUBPRIME, &pqg.subPrime },
{ CKA_BASE, &pqg.base },
{ CKA_NSS_JPAKE_SIGNERID, &signerID },
{ CKA_NSS_JPAKE_X2, &x2 },
{ CKA_NSS_JPAKE_GX1, &gx1 },
{ CKA_NSS_JPAKE_GX2, &gx2 },
};
SECItem x2s, gx3, gx4;
const SFTKItemTemplate copiedAndGeneratedAttrs[] = {
{ CKA_NSS_JPAKE_SIGNERID, &signerID },
{ CKA_PRIME, &pqg.prime },
{ CKA_SUBPRIME, &pqg.subPrime },
{ CKA_NSS_JPAKE_X2, &x2 },
{ CKA_NSS_JPAKE_X2S, &x2s },
{ CKA_NSS_JPAKE_GX1, &gx1 },
{ CKA_NSS_JPAKE_GX2, &gx2 },
{ CKA_NSS_JPAKE_GX3, &gx3 },
{ CKA_NSS_JPAKE_GX4, &gx4 }
};
SECItem peerID;
PORT_Assert(params != NULL);
PORT_Assert(sourceKey != NULL);
PORT_Assert(key != NULL);
arena = PORT_NewArena(NSS_SOFTOKEN_DEFAULT_CHUNKSIZE);
if (arena == NULL)
crv = CKR_HOST_MEMORY;
/* TODO: check CKK_NSS_JPAKE_ROUND1 */
crv = sftk_MultipleAttribute2SecItem(arena, sourceKey, sourceAttrs,
NUM_ELEM(sourceAttrs));
/* Get the peer's ID out of the template and sanity-check it. */
if (crv == CKR_OK)
crv = sftk_Attribute2SecItem(arena, &peerID, key,
CKA_NSS_JPAKE_PEERID);
if (crv == CKR_OK && (peerID.data == NULL || peerID.len == 0))
crv = CKR_TEMPLATE_INCOMPLETE;
if (crv == CKR_OK && SECITEM_CompareItem(&signerID, &peerID) == SECEqual)
crv = CKR_TEMPLATE_INCONSISTENT;
/* Verify zero-knowledge proofs for g^x3 and g^x4 */
if (crv == CKR_OK)
crv = jpake_Verify(arena, &pqg, hashType, &signerID,
peerID.data, peerID.len, &params->gx3);
if (crv == CKR_OK)
crv = jpake_Verify(arena, &pqg, hashType, &signerID,
peerID.data, peerID.len, &params->gx4);
/* Calculate the base and x2s for A=base^x2s */
if (crv == CKR_OK) {
SECItem s;
s.data = params->pSharedKey;
s.len = params->ulSharedKeyLen;
gx3.data = params->gx3.pGX;
gx3.len = params->gx3.ulGXLen;
gx4.data = params->gx4.pGX;
gx4.len = params->gx4.ulGXLen;
pqg.base.data = NULL;
x2s.data = NULL;
crv = jpake_mapStatus(JPAKE_Round2(arena, &pqg.prime, &pqg.subPrime,
&gx1, &gx3, &gx4, &pqg.base,
&x2, &s, &x2s),
CKR_MECHANISM_PARAM_INVALID);
}
/* Generate A=base^x2s and its zero-knowledge proof. */
if (crv == CKR_OK)
crv = jpake_Sign(arena, &pqg, hashType, &signerID, &x2s, &params->A);
/* Copy P and Q from the ROUND1 key to the ROUND2 key and save the values
needed for the final key material derivation into CKA_VALUE. */
if (crv == CKR_OK)
crv = sftk_forceAttribute(key, CKA_PRIME, pqg.prime.data,
pqg.prime.len);
if (crv == CKR_OK)
crv = sftk_forceAttribute(key, CKA_SUBPRIME, pqg.subPrime.data,
pqg.subPrime.len);
if (crv == CKR_OK) {
crv = jpake_MultipleSecItem2Attribute(key, copiedAndGeneratedAttrs,
NUM_ELEM(copiedAndGeneratedAttrs));
}
if (crv == CKR_OK)
crv = jpake_enforceKeyType(key, CKK_NSS_JPAKE_ROUND2);
PORT_FreeArena(arena, PR_TRUE);
return crv;
}
CK_RV
jpake_Final(HASH_HashType hashType, const CK_NSS_JPAKEFinalParams *param,
SFTKObject *sourceKey, SFTKObject *key)
{
PLArenaPool *arena;
SECItem K;
PQGParams pqg;
CK_RV crv;
SECItem peerID, signerID, x2s, x2, gx1, gx2, gx3, gx4;
SFTKItemTemplate sourceAttrs[] = {
{ CKA_NSS_JPAKE_PEERID, &peerID },
{ CKA_NSS_JPAKE_SIGNERID, &signerID },
{ CKA_PRIME, &pqg.prime },
{ CKA_SUBPRIME, &pqg.subPrime },
{ CKA_NSS_JPAKE_X2, &x2 },
{ CKA_NSS_JPAKE_X2S, &x2s },
{ CKA_NSS_JPAKE_GX1, &gx1 },
{ CKA_NSS_JPAKE_GX2, &gx2 },
{ CKA_NSS_JPAKE_GX3, &gx3 },
{ CKA_NSS_JPAKE_GX4, &gx4 }
};
PORT_Assert(param != NULL);
PORT_Assert(sourceKey != NULL);
PORT_Assert(key != NULL);
arena = PORT_NewArena(NSS_SOFTOKEN_DEFAULT_CHUNKSIZE);
if (arena == NULL)
crv = CKR_HOST_MEMORY;
/* TODO: verify key type CKK_NSS_JPAKE_ROUND2 */
crv = sftk_MultipleAttribute2SecItem(arena, sourceKey, sourceAttrs,
NUM_ELEM(sourceAttrs));
/* Calculate base for B=base^x4s */
if (crv == CKR_OK) {
pqg.base.data = NULL;
crv = jpake_mapStatus(JPAKE_Round2(arena, &pqg.prime, &pqg.subPrime,
&gx1, &gx2, &gx3, &pqg.base,
NULL, NULL, NULL),
CKR_MECHANISM_PARAM_INVALID);
}
/* Verify zero-knowledge proof for B */
if (crv == CKR_OK)
crv = jpake_Verify(arena, &pqg, hashType, &signerID,
peerID.data, peerID.len, &param->B);
if (crv == CKR_OK) {
SECItem B;
B.data = param->B.pGX;
B.len = param->B.ulGXLen;
K.data = NULL;
crv = jpake_mapStatus(JPAKE_Final(arena, &pqg.prime, &pqg.subPrime,
&x2, &gx4, &x2s, &B, &K),
CKR_MECHANISM_PARAM_INVALID);
}
/* Save key material into CKA_VALUE. */
if (crv == CKR_OK)
crv = sftk_forceAttribute(key, CKA_VALUE, K.data, K.len);
if (crv == CKR_OK)
crv = jpake_enforceKeyType(key, CKK_GENERIC_SECRET);
PORT_FreeArena(arena, PR_TRUE);
return crv;
}