+++ /dev/null
-/*
- * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
- *
- * The contents of this file constitute Original Code as defined in and are
- * subject to the Apple Public Source License Version 1.2 (the 'License').
- * You may not use this file except in compliance with the License. Please obtain
- * a copy of the License at http://www.apple.com/publicsource and read it before
- * using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
- * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
- * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
- * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
- * specific language governing rights and limitations under the License.
- */
-
-
-/*
- * FEEKeys.cpp - FEE-related asymmetric key pair classes.
- *
- * Created 2/21/2001 by dmitch.
- */
-
-#ifdef CRYPTKIT_CSP_ENABLE
-
-#include "FEEKeys.h"
-#include "FEECSPUtils.h"
-#include "CryptKitSpace.h"
-#include <CryptKit/feePublicKey.h>
-#include <CryptKit/falloc.h>
-#include <Security/cssmdata.h>
-#include "AppleCSPSession.h"
-#include "AppleCSPUtils.h"
-#include <assert.h>
-#include <Security/debugging.h>
-
-#define feeKeyDebug(args...) secdebug("feeKey", ## args)
-
-/***
- *** FEE-style BinaryKey
- ***/
-
-/* constructor with optional existing feePubKey */
-CryptKit::FEEBinaryKey::FEEBinaryKey(feePubKey feeKey)
- : mFeeKey(feeKey)
-{
- if(mFeeKey == NULL) {
- mFeeKey = feePubKeyAlloc();
- if(mFeeKey == NULL) {
- CssmError::throwMe(CSSMERR_CSP_MEMORY_ERROR);
- }
- }
-}
-
-CryptKit::FEEBinaryKey::~FEEBinaryKey()
-{
- if(mFeeKey) {
- feePubKeyFree(mFeeKey);
- mFeeKey = NULL;
- }
-}
-
-void CryptKit::FEEBinaryKey::generateKeyBlob(
- CssmAllocator &allocator,
- CssmData &blob,
- CSSM_KEYBLOB_FORMAT &format,
- AppleCSPSession &session,
- const CssmKey *paramKey, /* optional, unused here */
- CSSM_KEYATTR_FLAGS &attrFlags) /* IN/OUT */
-{
- unsigned char *keyBlob;
- unsigned len;
- feeReturn frtn;
- bool derBlob;
- bool freeTheKey = false;
- feePubKey keyToEncode = mFeeKey;
-
- assert(mFeeKey != NULL);
- switch(format) {
- /* also case FEE_KEYBLOB_DEFAULT_FORMAT: */
- case CSSM_KEYBLOB_RAW_FORMAT_NONE:
- derBlob = true;
- break;
- case CSSM_KEYBLOB_RAW_FORMAT_DIGEST:
- {
- /* key digest calculation; special case for private keys: cook
- * up the associated public key and encode that */
- if(mKeyHeader.KeyClass == CSSM_KEYCLASS_PRIVATE_KEY) {
- keyToEncode = feePubKeyAlloc();
- if(keyToEncode == NULL) {
- CssmError::throwMe(CSSMERR_CSP_MEMORY_ERROR);
- }
- frtn = feePubKeyInitPubKeyFromPriv(mFeeKey, keyToEncode);
- if(frtn) {
- feePubKeyFree(keyToEncode);
- throwCryptKit(frtn, "feePubKeyInitPubKeyFromPriv");
- }
- freeTheKey = true;
- }
- /* in any case, DER-encode a public key */
- derBlob = true;
- break;
- }
- case CSSM_KEYBLOB_RAW_FORMAT_OCTET_STRING:
- /* native non-DER-encoded blob */
- derBlob = false;
- break;
- default:
- feeKeyDebug("FEEBinaryKey::generateKeyBlob: bad format (%ld)\n", format);
- CssmError::throwMe(feePubKeyIsPrivate(mFeeKey) ?
- CSSMERR_CSP_INVALID_ATTR_PRIVATE_KEY_FORMAT :
- CSSMERR_CSP_INVALID_ATTR_PUBLIC_KEY_FORMAT);
- }
- if(feePubKeyIsPrivate(keyToEncode)) {
- if(derBlob) {
- frtn = feePubKeyCreateDERPrivBlob(keyToEncode, &keyBlob, &len);
- }
- else {
- frtn = feePubKeyCreatePrivBlob(keyToEncode, &keyBlob, &len);
- }
- }
- else {
- if(derBlob) {
- frtn = feePubKeyCreateDERPubBlob(keyToEncode, &keyBlob, &len);
- }
- else {
- frtn = feePubKeyCreatePubBlob(keyToEncode, &keyBlob, &len);
- }
- }
- if(frtn) {
- throwCryptKit(frtn, "feePubKeyCreate*Blob");
- }
- setUpCssmData(blob, len, allocator);
- memmove(blob.data(), keyBlob, len);
- blob.length(len);
- ffree(keyBlob);
- format = derBlob ? FEE_KEYBLOB_DEFAULT_FORMAT :
- CSSM_KEYBLOB_RAW_FORMAT_OCTET_STRING;
- if(freeTheKey) {
- /* free the temp pub key we created here */
- feePubKeyFree(keyToEncode);
- }
-}
-
-/***
- *** FEE-style AppleKeyPairGenContext
- ***/
-
-/*
- * This one is specified in, and called from, CSPFullPluginSession. Our
- * only job is to prepare two subclass-specific BinaryKeys and call up to
- * AppleKeyPairGenContext.
- */
-void CryptKit::FEEKeyPairGenContext::generate(
- const Context &context,
- CssmKey &pubKey,
- CssmKey &privKey)
-{
- FEEBinaryKey *pubBinKey = new FEEBinaryKey();
- FEEBinaryKey *privBinKey = new FEEBinaryKey();
-
- try {
- AppleKeyPairGenContext::generate(context,
- session(),
- pubKey,
- pubBinKey,
- privKey,
- privBinKey);
- }
- catch (...) {
- delete pubBinKey;
- delete privBinKey;
- throw;
- }
-
-}
-
-// this one is specified in, and called from, AppleKeyPairGenContext
-void CryptKit::FEEKeyPairGenContext::generate(
- const Context &context,
- BinaryKey &pubBinKey,
- BinaryKey &privBinKey,
- uint32 &keyBits)
-{
- /*
- * These casts throw exceptions if the keys are of the
- * wrong classes, which would be a major bogon, since we created
- * the keys in the above generate() function.
- */
- FEEBinaryKey &fPubBinKey =
- dynamic_cast<FEEBinaryKey &>(pubBinKey);
- FEEBinaryKey &fPrivBinKey =
- dynamic_cast<FEEBinaryKey &>(privBinKey);
-
- /*
- * Two parameters from context. Key size in bits is required;
- * seed is optional. If not present, we cook up random private data.
- */
- keyBits = context.getInt(CSSM_ATTRIBUTE_KEY_LENGTH,
- CSSMERR_CSP_MISSING_ATTR_KEY_LENGTH);
- CssmCryptoData *cseed = context.get<CssmCryptoData>(CSSM_ATTRIBUTE_SEED);
- CssmData *seed;
- bool haveSeed;
- CssmAutoData aSeed(session()); // malloc on demand
- if(cseed) {
- /* caller specified seed */
- haveSeed = true;
- seed = &cseed->param();
- }
- else {
- /* generate random seed */
- haveSeed = false;
- unsigned keyBytes = ((keyBits + 7) / 8) + 1;
- aSeed.malloc(keyBytes);
- session().getRandomBytes(keyBytes, aSeed);
- seed = &aSeed.get();
- }
-
- /* Curve and prime types - optional */
- feePrimeType primeType = FPT_Default;
- uint32 uPrimeType = context.getInt(CSSM_ATTRIBUTE_FEE_PRIME_TYPE);
- switch(uPrimeType) {
- case CSSM_FEE_PRIME_TYPE_DEFAULT:
- break;
- case CSSM_FEE_PRIME_TYPE_MERSENNE:
- primeType = FPT_Mersenne;
- break;
- case CSSM_FEE_PRIME_TYPE_FEE:
- primeType = FPT_FEE;
- break;
- case CSSM_FEE_PRIME_TYPE_GENERAL:
- primeType = FPT_General;
- break;
- default:
- /* FIXME - maybe we should be more specific */
- CssmError::throwMe(CSSMERR_CSP_INVALID_ATTR_ALG_PARAMS);
- }
- feeCurveType curveType = FCT_Default;
- uint32 uCurveType = context.getInt(CSSM_ATTRIBUTE_FEE_CURVE_TYPE);
- switch(uCurveType) {
- case CSSM_FEE_CURVE_TYPE_DEFAULT:
- break;
- case CSSM_FEE_CURVE_TYPE_MONTGOMERY:
- curveType = FCT_Montgomery;
- break;
- case CSSM_FEE_CURVE_TYPE_WEIERSTRASS:
- curveType = FCT_Weierstrass;
- break;
- default:
- /* FIXME - maybe we should be more specific */
- CssmError::throwMe(CSSMERR_CSP_INVALID_ATTR_ALG_PARAMS);
- }
- feeReturn frtn = feePubKeyInitFromPrivDataKeyBits(
- fPrivBinKey.feeKey(),
- (unsigned char *)seed->data(),
- seed->length(),
- keyBits,
- primeType,
- curveType,
- /*
- * our random seed: trust it
- * caller's seed: hash it
- */
- haveSeed ? 1 : 0);
- if(frtn) {
- throwCryptKit(frtn, "feePubKeyInitFromPrivDataKeyBits");
- }
- frtn = feePubKeyInitPubKeyFromPriv(fPrivBinKey.feeKey(),
- fPubBinKey.feeKey());
- if(frtn) {
- throwCryptKit(frtn, "feePubKeyInitPubKeyFromPriv");
- }
-}
-
-
-/***
- *** FEE-style CSPKeyInfoProvider.
- ***/
-CryptKit::FEEKeyInfoProvider::FEEKeyInfoProvider(
- const CssmKey &cssmKey,
- AppleCSPSession &session) :
- CSPKeyInfoProvider(cssmKey, session)
-{
-}
-CSPKeyInfoProvider *FEEKeyInfoProvider::provider(
- const CssmKey &cssmKey,
- AppleCSPSession &session)
-{
- switch(cssmKey.algorithm()) {
- case CSSM_ALGID_FEE:
- break;
- default:
- return NULL;
- }
- switch(cssmKey.keyClass()) {
- case CSSM_KEYCLASS_PUBLIC_KEY:
- case CSSM_KEYCLASS_PRIVATE_KEY:
- /* FIXME - verify proper CSSM_KEYBLOB_RAW_FORMAT_xx */
- break;
- default:
- return NULL;
- }
- /* OK, we'll handle this one */
- return new FEEKeyInfoProvider(cssmKey, session);
-}
-
-/* Given a raw key, cook up a Binary key */
-void CryptKit::FEEKeyInfoProvider::CssmKeyToBinary(
- CssmKey *paramKey, // optional, ignored
- CSSM_KEYATTR_FLAGS &attrFlags, // IN/OUT
- BinaryKey **binKey)
-{
- *binKey = NULL;
- feePubKey feeKey = NULL;
-
- /* first cook up a feePubKey, then drop that into a BinaryKey */
- feeKey = rawCssmKeyToFee(mKey);
- FEEBinaryKey *feeBinKey = new FEEBinaryKey(feeKey);
- *binKey = feeBinKey;
-}
-
-/*
- * Obtain key size in bits.
- * Currently only raw public keys are dealt with (they're the ones
- * which come from certs, the only current use for this function).
- * Note that if we need to handle ref keys, we'll need a session ref...
- */
-void CryptKit::FEEKeyInfoProvider::QueryKeySizeInBits(
- CSSM_KEY_SIZE &keySize)
-{
- feePubKey feeKey = NULL;
-
- if(mKey.blobType() != CSSM_KEYBLOB_RAW) {
- CssmError::throwMe(CSSMERR_CSP_INVALID_KEY_FORMAT);
- }
- feeKey = rawCssmKeyToFee(mKey);
- keySize.LogicalKeySizeInBits = feePubKeyBitsize(feeKey);
- keySize.EffectiveKeySizeInBits = keySize.LogicalKeySizeInBits;
- feePubKeyFree(feeKey);
-}
-
-/*
- * Obtain blob suitable for hashing in CSSM_APPLECSP_KEYDIGEST
- * passthrough.
- */
-bool CryptKit::FEEKeyInfoProvider::getHashableBlob(
- CssmAllocator &allocator,
- CssmData &blob) // blob to hash goes here
-{
- /*
- * The optimized case, a raw key in the "proper" format already.
- */
- assert(mKey.blobType() == CSSM_KEYBLOB_RAW);
- if((mKey.blobFormat() == CSSM_KEYBLOB_RAW_FORMAT_NONE) &&
- (mKey.keyClass() == CSSM_KEYCLASS_PUBLIC_KEY)) {
- const CssmData &keyBlob = CssmData::overlay(mKey.KeyData);
- copyCssmData(keyBlob, blob, allocator);
- return true;
- }
-
- /* caller converts to binary and proceeds */
- return false;
-}
-
-#endif /* CRYPTKIT_CSP_ENABLE */
projects / apple / security.git / blobdiff