From 93ae6fc407d98eda73c6e27b1c918c67c67eeb92 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon, 27 Mar 2023 03:23:59 +0300
Subject: [PATCH] pss: add function to get salt length from RSA PSS keys

To create proper RsaPssParams it is necessary to determine the salt
length specified for the signing key. Add a function to get it from
signing keys.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 src/pss.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/pss.rs b/src/pss.rs
index 6b0ccbf5..cd75fe80 100644
--- a/src/pss.rs
+++ b/src/pss.rs
@@ -677,6 +677,11 @@ where
             phantom: Default::default(),
         })
     }
+
+    /// Return specified salt length for this key
+    pub fn salt_len(&self) -> Option<usize> {
+        self.salt_len
+    }
 }
 
 impl<D> From<RsaPrivateKey> for SigningKey<D>
@@ -808,6 +813,11 @@ where
             phantom: Default::default(),
         }
     }
+
+    /// Return specified salt length for this key
+    pub fn salt_len(&self) -> Option<usize> {
+        self.salt_len
+    }
 }
 
 impl<D> From<RsaPrivateKey> for BlindedSigningKey<D>