| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "crypto/nss_key_util.h" |
| |
| #include <cryptohi.h> |
| #include <keyhi.h> |
| #include <pk11pub.h> |
| #include <secmod.h> |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "base/logging.h" |
| #include "crypto/nss_util.h" |
| #include "crypto/nss_util_internal.h" |
| |
| namespace crypto { |
| |
| namespace { |
| |
| struct PublicKeyInfoDeleter { |
| inline void operator()(CERTSubjectPublicKeyInfo* spki) { |
| SECKEY_DestroySubjectPublicKeyInfo(spki); |
| } |
| }; |
| |
| typedef std::unique_ptr<CERTSubjectPublicKeyInfo, PublicKeyInfoDeleter> |
| ScopedPublicKeyInfo; |
| |
| // Decodes |input| as a SubjectPublicKeyInfo and returns a SECItem containing |
| // the CKA_ID of that public key or nullptr on error. |
| ScopedSECItem MakeIDFromSPKI(const std::vector<uint8_t>& input) { |
| // First, decode and save the public key. |
| SECItem key_der; |
| key_der.type = siBuffer; |
| key_der.data = const_cast<unsigned char*>(input.data()); |
| key_der.len = input.size(); |
| |
| ScopedPublicKeyInfo spki(SECKEY_DecodeDERSubjectPublicKeyInfo(&key_der)); |
| if (!spki) |
| return nullptr; |
| |
| ScopedSECKEYPublicKey result(SECKEY_ExtractPublicKey(spki.get())); |
| if (!result) |
| return nullptr; |
| |
| // See pk11_MakeIDFromPublicKey from NSS. For now, only RSA keys are |
| // supported. |
| if (SECKEY_GetPublicKeyType(result.get()) != rsaKey) |
| return nullptr; |
| |
| return ScopedSECItem(PK11_MakeIDFromPubKey(&result->u.rsa.modulus)); |
| } |
| |
| } // namespace |
| |
| bool GenerateRSAKeyPairNSS(PK11SlotInfo* slot, |
| uint16_t num_bits, |
| bool permanent, |
| ScopedSECKEYPublicKey* public_key, |
| ScopedSECKEYPrivateKey* private_key) { |
| DCHECK(slot); |
| |
| PK11RSAGenParams param; |
| param.keySizeInBits = num_bits; |
| param.pe = 65537L; |
| SECKEYPublicKey* public_key_raw = nullptr; |
| private_key->reset(PK11_GenerateKeyPair(slot, CKM_RSA_PKCS_KEY_PAIR_GEN, |
| ¶m, &public_key_raw, permanent, |
| permanent /* sensitive */, nullptr)); |
| if (!*private_key) |
| return false; |
| |
| public_key->reset(public_key_raw); |
| return true; |
| } |
| |
| ScopedSECKEYPrivateKey ImportNSSKeyFromPrivateKeyInfo( |
| PK11SlotInfo* slot, |
| const std::vector<uint8_t>& input, |
| bool permanent) { |
| DCHECK(slot); |
| |
| ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE)); |
| DCHECK(arena); |
| |
| // Excess data is illegal, but NSS silently accepts it, so first ensure that |
| // |input| consists of a single ASN.1 element. |
| SECItem input_item; |
| input_item.data = const_cast<unsigned char*>(input.data()); |
| input_item.len = input.size(); |
| SECItem der_private_key_info; |
| SECStatus rv = |
| SEC_QuickDERDecodeItem(arena.get(), &der_private_key_info, |
| SEC_ASN1_GET(SEC_AnyTemplate), &input_item); |
| if (rv != SECSuccess) |
| return nullptr; |
| |
| // Allow the private key to be used for key unwrapping, data decryption, |
| // and signature generation. |
| const unsigned int key_usage = |
| KU_KEY_ENCIPHERMENT | KU_DATA_ENCIPHERMENT | KU_DIGITAL_SIGNATURE; |
| SECKEYPrivateKey* key_raw = nullptr; |
| rv = PK11_ImportDERPrivateKeyInfoAndReturnKey( |
| slot, &der_private_key_info, nullptr, nullptr, permanent, |
| permanent /* sensitive */, key_usage, &key_raw, nullptr); |
| if (rv != SECSuccess) |
| return nullptr; |
| return ScopedSECKEYPrivateKey(key_raw); |
| } |
| |
| ScopedSECKEYPrivateKey FindNSSKeyFromPublicKeyInfo( |
| const std::vector<uint8_t>& input) { |
| EnsureNSSInit(); |
| |
| ScopedSECItem cka_id(MakeIDFromSPKI(input)); |
| if (!cka_id) |
| return nullptr; |
| |
| // Search all slots in all modules for the key with the given ID. |
| AutoSECMODListReadLock auto_lock; |
| const SECMODModuleList* head = SECMOD_GetDefaultModuleList(); |
| for (const SECMODModuleList* item = head; item != nullptr; |
| item = item->next) { |
| int slot_count = item->module->loaded ? item->module->slotCount : 0; |
| for (int i = 0; i < slot_count; i++) { |
| // Look for the key in slot |i|. |
| ScopedSECKEYPrivateKey key( |
| PK11_FindKeyByKeyID(item->module->slots[i], cka_id.get(), nullptr)); |
| if (key) |
| return key; |
| } |
| } |
| |
| // The key wasn't found in any module. |
| return nullptr; |
| } |
| |
| ScopedSECKEYPrivateKey FindNSSKeyFromPublicKeyInfoInSlot( |
| const std::vector<uint8_t>& input, |
| PK11SlotInfo* slot) { |
| DCHECK(slot); |
| |
| ScopedSECItem cka_id(MakeIDFromSPKI(input)); |
| if (!cka_id) |
| return nullptr; |
| |
| return ScopedSECKEYPrivateKey( |
| PK11_FindKeyByKeyID(slot, cka_id.get(), nullptr)); |
| } |
| |
| } // namespace crypto |