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