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mechanism.cc
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mechanism.cc
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "kmsp11/mechanism.h"
#include "absl/container/flat_hash_map.h"
#include "kmsp11/kmsp11.h"
namespace cloud_kms::kmsp11 {
namespace {
constexpr CK_FLAGS kEcFlags =
CKF_EC_F_P | CKF_EC_NAMEDCURVE | CKF_EC_UNCOMPRESS;
} // namespace
const absl::flat_hash_map<CK_MECHANISM_TYPE, const CK_MECHANISM_INFO>&
AllMechanisms() {
static const absl::flat_hash_map<CK_MECHANISM_TYPE, const CK_MECHANISM_INFO>
kMechanisms = {
// min/max key size of ECDSA mechanisms should be in bits, per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894664.
{
CKM_ECDSA,
{
256, // ulMinKeySize
384, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY | kEcFlags // flags
},
},
{
CKM_ECDSA_SHA256,
{
256, // ulMinKeySize
256, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY | kEcFlags // flags
},
},
{
CKM_ECDSA_SHA384,
{
384, // ulMinKeySize
384, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY | kEcFlags // flags
},
},
{
CKM_EC_KEY_PAIR_GEN,
{
256, // ulMinKeySize
384, // ulMaxKeySize
CKF_HW | CKF_GENERATE_KEY_PAIR | kEcFlags // flags
},
},
// min/max key size of PKCS #1 RSA mechanisms should be in bits, per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894633.
{
CKM_RSA_PKCS_KEY_PAIR_GEN,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_HW | CKF_GENERATE_KEY_PAIR // flags
},
},
{
CKM_RSA_PKCS,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA256_RSA_PKCS,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA512_RSA_PKCS,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
// min/max key size of PKCS #1 RSA OAEP mechanisms should be in bits,
// per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894637.
{
CKM_RSA_PKCS_OAEP,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
// min/max key size of PKCS #1 RSA PSS mechanisms should be in bits,
// per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894639.
{
CKM_RSA_PKCS_PSS,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA256_RSA_PKCS_PSS,
{
2048, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA512_RSA_PKCS_PSS,
{
4096, // ulMinKeySize
4096, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
// min/max key size should be in bits, per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894692
{
CKM_GENERIC_SECRET_KEY_GEN,
{
160, // ulMinKeySize
256, // ulMaxKeySize
CKF_HW | CKF_GENERATE // flags
},
},
// min/max key size should be in bytes, per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v3.0/os/pkcs11-curr-v3.0-os.html#_Toc30061300.
{
CKM_SHA_1_HMAC,
{
20, // ulMinKeySize
20, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA224_HMAC,
{
28, // ulMinKeySize
28, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA256_HMAC,
{
32, // ulMinKeySize
32, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA384_HMAC,
{
48, // ulMinKeySize
48, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
{
CKM_SHA512_HMAC,
{
48, // ulMinKeySize
48, // ulMaxKeySize
CKF_SIGN | CKF_VERIFY // flags
},
},
// min/max key size should be in bytes, per
// https://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/cs01/pkcs11-curr-v2.40-cs01.html#_Toc228894697
{
CKM_AES_KEY_GEN,
{
16, // ulMinKeySize
32, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
{
CKM_CLOUDKMS_AES_GCM,
{
16, // ulMinKeySize
32, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
{
CKM_AES_CTR,
{
16, // ulMinKeySize
32, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
{
CKM_AES_CBC,
{
16, // ulMinKeySize
32, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
{
CKM_AES_CBC_PAD,
{
16, // ulMinKeySize
32, // ulMaxKeySize
CKF_DECRYPT | CKF_ENCRYPT // flags
},
},
};
return kMechanisms;
}
const absl::flat_hash_set<CK_MECHANISM_TYPE>& AllMacMechanisms() {
// These mechanisms are only supported if the experimental_allow_mac_keys
// config flag is set.
static const absl::flat_hash_set<CK_MECHANISM_TYPE> kMacMechanisms = {
CKM_SHA_1_HMAC, CKM_SHA224_HMAC, CKM_SHA256_HMAC,
CKM_SHA384_HMAC, CKM_SHA512_HMAC,
};
return kMacMechanisms;
}
const absl::flat_hash_set<CK_MECHANISM_TYPE>& AllRawEncryptionMechanisms() {
// These mechanisms are only supported if the
// experimental_allow_raw_encryption_keys config flag is set.
static const absl::flat_hash_set<CK_MECHANISM_TYPE> kRawEncryptionMechanisms =
{CKM_CLOUDKMS_AES_GCM, CKM_AES_CTR, CKM_AES_CBC, CKM_AES_CBC_PAD};
return kRawEncryptionMechanisms;
}
} // namespace cloud_kms::kmsp11