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From 181b11362e95ff8ac4e812073c8f7267a02f1bf1 Mon Sep 17 00:00:00 2001
From: Ingo Franzki <ifranzki@linux.ibm.com>
Date: Wed, 2 Mar 2022 16:44:27 +0100
Subject: [PATCH 28/34] POLICY/STATISTICS: Check for Kyber KEM KDFs and count
KDF digest usage
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
---
man/man5/policy.conf.5.in | 2 +-
tools/policyexamplegen.c | 8 ++++++-
usr/lib/api/policy.c | 45 ++++++++++++++++++++++++++++++++++++----
usr/lib/api/statistics.c | 20 +++++++++++++++++-
usr/lib/common/kdf_translation.c | 30 +++++++++++++++++++++++++++
usr/lib/common/utility_common.c | 5 +++++
6 files changed, 103 insertions(+), 7 deletions(-)
diff --git a/man/man5/policy.conf.5.in b/man/man5/policy.conf.5.in
index 0b8bed27..c04b2adf 100644
--- a/man/man5/policy.conf.5.in
+++ b/man/man5/policy.conf.5.in
@@ -133,7 +133,7 @@ empty list allows no MGF.
.BR allowedkdfs
This key specifies the allowed Key Derivation Functions (KDFs) for use
-in ECDH key derivation. The value is a list of
+in ECDH key derivation and Kyber KEM. The value is a list of
.BR CKD_
constants supported by openCryptoki. This list has the same format as
the
diff --git a/tools/policyexamplegen.c b/tools/policyexamplegen.c
index 1649fc05..362acdf9 100644
--- a/tools/policyexamplegen.c
+++ b/tools/policyexamplegen.c
@@ -99,7 +99,13 @@ int main(void)
puts(" CKD_SHA224_KDF,");
puts(" CKD_SHA256_KDF,");
puts(" CKD_SHA384_KDF,");
- puts(" CKD_SHA512_KDF");
+ puts(" CKD_SHA512_KDF,");
+ puts(" CKD_IBM_HYBRID_NULL,");
+ puts(" CKD_IBM_HYBRID_SHA1_KDF,");
+ puts(" CKD_IBM_HYBRID_SHA224_KDF,");
+ puts(" CKD_IBM_HYBRID_SHA256_KDF,");
+ puts(" CKD_IBM_HYBRID_SHA384_KDF,");
+ puts(" CKD_IBM_HYBRID_SHA512_KDF");
puts(" # No comma after last element!");
puts(")");
puts("");
diff --git a/usr/lib/api/policy.c b/usr/lib/api/policy.c
index b513a8a9..8189dab0 100644
--- a/usr/lib/api/policy.c
+++ b/usr/lib/api/policy.c
@@ -70,6 +70,7 @@ struct policy_private {
CK_ULONG allowedmgfs;
CK_ULONG allowedvendormgfs;
CK_ULONG allowedkdfs;
+ CK_ULONG allowedvendorkdfs;
CK_ULONG allowedprfs;
CK_ULONG maxcurvesize;
/* Strength struct ordered from highest to lowest. */
@@ -105,6 +106,7 @@ void policy_private_deactivate(struct policy_private *pp)
pp->allowedmgfs = ~0lu;
pp->allowedvendormgfs = ~0lu;
pp->allowedkdfs = ~0lu;
+ pp->allowedvendorkdfs = ~0lu;
pp->allowedprfs = ~0lu;
pp->maxcurvesize = 521u;
}
@@ -496,8 +498,14 @@ static inline CK_RV policy_is_mgf_allowed(struct policy_private *pp,
static inline CK_RV policy_is_kdf_allowed(struct policy_private *pp,
CK_ULONG kdf)
{
- if (pp->allowedkdfs & (1u << kdf))
- return CKR_OK;
+ if (kdf > CKD_VENDOR_DEFINED) {
+ if ((kdf - CKD_VENDOR_DEFINED - 1) <= 31 &&
+ (pp->allowedvendorkdfs & (1u << (kdf - CKD_VENDOR_DEFINED - 1))))
+ return CKR_OK;
+ } else {
+ if (kdf <= 31 && (pp->allowedkdfs & (1u << kdf)))
+ return CKR_OK;
+ }
TRACE_WARNING("POLICY VIOLATION: kdf not allowed: 0x%lx\n", kdf);
return CKR_FUNCTION_FAILED;
}
@@ -920,6 +928,16 @@ static CK_RV policy_is_mech_allowed(policy_t p, CK_MECHANISM_PTR mech,
break;
}
break;
+ case CKM_IBM_KYBER:
+ /* Only KEM uses a parameter, KeyGen, Encrypt/Decrypt don't */
+ if (mech->ulParameterLen != sizeof(CK_IBM_KYBER_PARAMS))
+ break;
+ if (policy_is_kdf_allowed(pp,
+ ((CK_IBM_KYBER_PARAMS *)mech->pParameter)->kdf) != CKR_OK) {
+ rv = CKR_FUNCTION_FAILED;
+ break;
+ }
+ break;
default:
break;
}
@@ -1533,7 +1551,7 @@ static CK_RV policy_parse_kdfs(struct policy_private *pp,
struct ConfigBaseNode *list)
{
struct ConfigBaseNode *i;
- CK_ULONG kdfs = 0, kdf;
+ CK_ULONG kdfs = 0, vkdfs = 0, kdf;
CK_RV rc = CKR_OK;
int f;
@@ -1545,10 +1563,28 @@ static CK_RV policy_parse_kdfs(struct policy_private *pp,
i->key, i->line);
break;
}
- kdfs |= (1u << kdf);
+
+ if (kdf >= CKD_VENDOR_DEFINED) {
+ if ((kdf - CKD_VENDOR_DEFINED - 1) > 31) {
+ TRACE_ERROR("POLICY: KDF invalid: \"%s\" (line %hd)\n",
+ i->key, i->line);
+ rc = CKR_FUNCTION_FAILED;
+ break;
+ }
+ vkdfs |= (1u << (kdf - CKD_VENDOR_DEFINED - 1));
+ } else {
+ if (kdf > 31) {
+ TRACE_ERROR("POLICY: KDF invalid: \"%s\" (line %hd)\n",
+ i->key, i->line);
+ rc = CKR_FUNCTION_FAILED;
+ break;
+ }
+ kdfs |= (1u << kdf);
+ }
}
}
pp->allowedkdfs = kdfs;
+ pp->allowedvendorkdfs = vkdfs;
return rc;
}
@@ -1742,6 +1778,7 @@ CK_RV policy_load_policy_cfg(struct policy_private *pp,
if (!allowedkdfs) {
TRACE_DEVEL("POLICY: No KDF restrictions\n");
pp->allowedkdfs = ~0u;
+ pp->allowedvendorkdfs = ~0u;
} else if (!confignode_hastype(allowedkdfs, CT_BARELIST)) {
TRACE_ERROR("POLICY: allowedkdfs has wrong type!\n");
OCK_SYSLOG(LOG_ERR, "POLICY: allowedkdfs has wrong type!\n");
diff --git a/usr/lib/api/statistics.c b/usr/lib/api/statistics.c
index 0830bbeb..e34dfcee 100644
--- a/usr/lib/api/statistics.c
+++ b/usr/lib/api/statistics.c
@@ -110,7 +110,8 @@ static CK_RV statistics_increment(struct statistics *statistics,
if (mech->pParameter == NULL ||
mech->ulParameterLen != sizeof(CK_ECDH1_DERIVE_PARAMS))
return CKR_MECHANISM_PARAM_INVALID;
- if (((CK_ECDH1_DERIVE_PARAMS *)mech->pParameter)->kdf == CKD_NULL)
+ if (((CK_ECDH1_DERIVE_PARAMS *)mech->pParameter)->kdf == CKD_NULL ||
+ ((CK_ECDH1_DERIVE_PARAMS *)mech->pParameter)->kdf == CKD_IBM_HYBRID_NULL)
break;
rc = digest_from_kdf(((CK_ECDH1_DERIVE_PARAMS *)mech->pParameter)->kdf,
&implicit_mech.mechanism);
@@ -156,6 +157,23 @@ static CK_RV statistics_increment(struct statistics *statistics,
break;
}
break;
+ case CKM_IBM_KYBER:
+ /* Only KEM uses a parameter, KeyGen, Encrypt/Decrypt don't */
+ if (mech->ulParameterLen != sizeof(CK_IBM_KYBER_PARAMS))
+ break;
+ if (((CK_IBM_KYBER_PARAMS *)mech->pParameter)->kdf == CKD_NULL ||
+ ((CK_IBM_KYBER_PARAMS *)mech->pParameter)->kdf == CKD_IBM_HYBRID_NULL)
+ break;
+ rc = digest_from_kdf(((CK_IBM_KYBER_PARAMS *)mech->pParameter)->kdf,
+ &implicit_mech.mechanism);
+ if (rc != CKR_OK)
+ return rc;
+ rc = statistics_increment(statistics, slot, &implicit_mech,
+ POLICY_STRENGTH_IDX_0);
+ if (rc != CKR_OK)
+ return rc;
+ break;
+
default:
break;
}
diff --git a/usr/lib/common/kdf_translation.c b/usr/lib/common/kdf_translation.c
index 707cb912..f563234f 100644
--- a/usr/lib/common/kdf_translation.c
+++ b/usr/lib/common/kdf_translation.c
@@ -55,6 +55,36 @@ CK_RV translate_string_to_kdf(const char *str, size_t len, CK_ULONG* kdf)
return CKR_OK;
}
return CKR_FUNCTION_FAILED;
+ case 19:
+ if (strcmp("CKD_IBM_HYBRID_NULL", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_NULL;
+ return CKR_OK;
+ }
+ return CKR_FUNCTION_FAILED;
+ case 23:
+ if (strcmp("CKD_IBM_HYBRID_SHA1_KDF", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_SHA1_KDF;
+ return CKR_OK;
+ }
+ return CKR_FUNCTION_FAILED;
+ case 25:
+ if (strcmp("CKD_IBM_HYBRID_SHA224_KDF", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_SHA224_KDF;
+ return CKR_OK;
+ }
+ if (strcmp("CKD_IBM_HYBRID_SHA256_KDF", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_SHA256_KDF;
+ return CKR_OK;
+ }
+ if (strcmp("CKD_IBM_HYBRID_SHA384_KDF", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_SHA384_KDF;
+ return CKR_OK;
+ }
+ if (strcmp("CKD_IBM_HYBRID_SHA512_KDF", str) == 0) {
+ *kdf = CKD_IBM_HYBRID_SHA512_KDF;
+ return CKR_OK;
+ }
+ return CKR_FUNCTION_FAILED;
default:
return CKR_FUNCTION_FAILED;
}
diff --git a/usr/lib/common/utility_common.c b/usr/lib/common/utility_common.c
index 8d03c699..49ab609f 100644
--- a/usr/lib/common/utility_common.c
+++ b/usr/lib/common/utility_common.c
@@ -169,18 +169,23 @@ CK_RV digest_from_kdf(CK_EC_KDF_TYPE kdf, CK_MECHANISM_TYPE *mech)
{
switch (kdf) {
case CKD_SHA1_KDF:
+ case CKD_IBM_HYBRID_SHA1_KDF:
*mech = CKM_SHA_1;
break;
case CKD_SHA224_KDF:
+ case CKD_IBM_HYBRID_SHA224_KDF:
*mech = CKM_SHA224;
break;
case CKD_SHA256_KDF:
+ case CKD_IBM_HYBRID_SHA256_KDF:
*mech = CKM_SHA256;
break;
case CKD_SHA384_KDF:
+ case CKD_IBM_HYBRID_SHA384_KDF:
*mech = CKM_SHA384;
break;
case CKD_SHA512_KDF:
+ case CKD_IBM_HYBRID_SHA512_KDF:
*mech = CKM_SHA512;
break;
default:
--
2.16.2.windows.1
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