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openssl/SOURCES/0112-pbdkf2-Set-indicator-i...

81 lines
2.9 KiB

From fa96a2f493276e7a57512e8c3d535052586f1525 Mon Sep 17 00:00:00 2001
From: Clemens Lang <cllang@redhat.com>
Date: Mon, 6 Mar 2023 12:32:04 +0100
Subject: [PATCH 2/2] pbdkf2: Set indicator if pkcs5 param disabled checks
The pbkdf2 implementation in the FIPS provider supports the checks
required by NIST, but allows disabling these checks by setting the
OSSL_KDF_PARAM_PKCS5 parameter to 1. The implementation must indicate
that the use of this configuration is not approved in FIPS mode. Add an
explicit indicator to provide this indication.
Resolves: rhbz#2175145
Signed-off-by: Clemens Lang <cllang@redhat.com>
---
providers/implementations/kdfs/pbkdf2.c | 40 +++++++++++++++++++++++--
1 file changed, 37 insertions(+), 3 deletions(-)
diff --git a/providers/implementations/kdfs/pbkdf2.c b/providers/implementations/kdfs/pbkdf2.c
index aa0adce5e6..6df8c6d321 100644
--- a/providers/implementations/kdfs/pbkdf2.c
+++ b/providers/implementations/kdfs/pbkdf2.c
@@ -251,11 +251,42 @@ static const OSSL_PARAM *kdf_pbkdf2_settable_ctx_params(ossl_unused void *ctx,
static int kdf_pbkdf2_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
+#ifdef FIPS_MODULE
+ KDF_PBKDF2 *ctx = (KDF_PBKDF2 *)vctx;
+#endif /* defined(FIPS_MODULE) */
OSSL_PARAM *p;
+ int any_valid = 0; /* set to 1 when at least one parameter was valid */
+
+ if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL) {
+ any_valid = 1;
+
+ if (!OSSL_PARAM_set_size_t(p, SIZE_MAX))
+ return 0;
+ }
+
+#ifdef FIPS_MODULE
+ if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_REDHAT_FIPS_INDICATOR))
+ != NULL) {
+ int fips_indicator = EVP_KDF_REDHAT_FIPS_INDICATOR_APPROVED;
+
+ /* The lower_bound_checks parameter enables checks required by FIPS. If
+ * those checks are disabled, the PBKDF2 implementation will also
+ * support non-approved parameters (e.g., salt lengths < 16 bytes, see
+ * NIST SP 800-132 section 5.1). */
+ if (!ctx->lower_bound_checks)
+ fips_indicator = EVP_KDF_REDHAT_FIPS_INDICATOR_NOT_APPROVED;
- if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL)
- return OSSL_PARAM_set_size_t(p, SIZE_MAX);
- return -2;
+ if (!OSSL_PARAM_set_int(p, fips_indicator))
+ return 0;
+
+ any_valid = 1;
+ }
+#endif /* defined(FIPS_MODULE) */
+
+ if (!any_valid)
+ return -2;
+
+ return 1;
}
static const OSSL_PARAM *kdf_pbkdf2_gettable_ctx_params(ossl_unused void *ctx,
@@ -263,6 +294,9 @@ static const OSSL_PARAM *kdf_pbkdf2_gettable_ctx_params(ossl_unused void *ctx,
{
static const OSSL_PARAM known_gettable_ctx_params[] = {
OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL),
+#ifdef FIPS_MODULE
+ OSSL_PARAM_int(OSSL_KDF_PARAM_REDHAT_FIPS_INDICATOR, NULL),
+#endif /* defined(FIPS_MODULE) */
OSSL_PARAM_END
};
return known_gettable_ctx_params;
--
2.39.2