From 98ee6faef3da1439c04f11cd2796132d27d1e607 Mon Sep 17 00:00:00 2001
From: Dmitry Belyavskiy <dbelyavs@redhat.com>
Date: Mon, 21 Aug 2023 15:58:07 +0200
Subject: [PATCH 41/48] 0088-signature-Add-indicator-for-PSS-salt-length.patch

Patch-name: 0088-signature-Add-indicator-for-PSS-salt-length.patch
Patch-id: 88
---
 include/openssl/core_names.h                  |  1 +
 include/openssl/evp.h                         |  4 ++++
 providers/implementations/signature/rsa_sig.c | 21 +++++++++++++++++++
 3 files changed, 26 insertions(+)

diff --git a/include/openssl/core_names.h b/include/openssl/core_names.h
index 1d1da4d3ca..48af87e236 100644
--- a/include/openssl/core_names.h
+++ b/include/openssl/core_names.h
@@ -458,6 +458,7 @@ extern "C" {
 #define OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES    \
     OSSL_PKEY_PARAM_MGF1_PROPERTIES
 #define OSSL_SIGNATURE_PARAM_DIGEST_SIZE        OSSL_PKEY_PARAM_DIGEST_SIZE
+#define OSSL_SIGNATURE_PARAM_REDHAT_FIPS_INDICATOR "redhat-fips-indicator"
 
 /* Asym cipher parameters */
 #define OSSL_ASYM_CIPHER_PARAM_DIGEST                   OSSL_PKEY_PARAM_DIGEST
diff --git a/include/openssl/evp.h b/include/openssl/evp.h
index 615857caf5..05f2d0f75a 100644
--- a/include/openssl/evp.h
+++ b/include/openssl/evp.h
@@ -799,6 +799,10 @@ __owur int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm,
 __owur int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                               int *outl);
 
+# define EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_UNDETERMINED 0
+# define EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_APPROVED     1
+# define EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_NOT_APPROVED 2
+
 __owur int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s,
                          EVP_PKEY *pkey);
 __owur int EVP_SignFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s,
diff --git a/providers/implementations/signature/rsa_sig.c b/providers/implementations/signature/rsa_sig.c
index cfaa4841cb..851671cfb1 100644
--- a/providers/implementations/signature/rsa_sig.c
+++ b/providers/implementations/signature/rsa_sig.c
@@ -1173,6 +1173,24 @@ static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
         }
     }
 
+#ifdef FIPS_MODULE
+    p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_REDHAT_FIPS_INDICATOR);
+    if (p != NULL) {
+        int fips_indicator = EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_APPROVED;
+        if (prsactx->pad_mode == RSA_PKCS1_PSS_PADDING) {
+            if (prsactx->md == NULL) {
+                fips_indicator = EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_UNDETERMINED;
+            } else if (rsa_pss_compute_saltlen(prsactx) > EVP_MD_get_size(prsactx->md)) {
+                fips_indicator = EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_NOT_APPROVED;
+            }
+        } else if (prsactx->pad_mode == RSA_NO_PADDING) {
+            if (prsactx->md == NULL) /* Should always be the case */
+                fips_indicator = EVP_SIGNATURE_REDHAT_FIPS_INDICATOR_NOT_APPROVED;
+        }
+        return OSSL_PARAM_set_int(p, fips_indicator);
+    }
+#endif
+
     return 1;
 }
 
@@ -1182,6 +1200,9 @@ static const OSSL_PARAM known_gettable_ctx_params[] = {
     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0),
     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0),
+#ifdef FIPS_MODULE
+    OSSL_PARAM_int(OSSL_SIGNATURE_PARAM_REDHAT_FIPS_INDICATOR, NULL),
+#endif
     OSSL_PARAM_END
 };
 
-- 
2.41.0