From 5da3b45fdce8354e320df91b26a170b21291c32e Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Thu, 20 Aug 2009 12:03:32 -0400
Subject: [PATCH] Make crypto_digest_get_digest nondestructive again.

Fixes bug in f57883a39.
---
 src/common/crypto.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/common/crypto.c b/src/common/crypto.c
index dc645b5eda..4a61d3faf3 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -1510,11 +1510,11 @@ crypto_digest_get_digest(crypto_digest_env_t *digest,
   switch (digest->algorithm) {
     case DIGEST_SHA1:
       tor_assert(out_len <= DIGEST_LEN);
-      SHA1_Final(r, &digest->d.sha1);
+      SHA1_Final(r, &tmpenv.d.sha1);
       break;
     case DIGEST_SHA256:
       tor_assert(out_len <= DIGEST256_LEN);
-      SHA256_Final(r, &digest->d.sha2);
+      SHA256_Final(r, &tmpenv.d.sha2);
       break;
     default:
       tor_fragile_assert();