From 6dc576bab7cf2be774649ea9b3fa665dbc6566d6 Mon Sep 17 00:00:00 2001 From: Roger Dingledine Date: Sat, 15 May 2004 23:49:41 +0000 Subject: bugfix: our integrity-checking digest was checking only the most recent cell, not the previous cells like we'd thought. this change is backward incompatible. svn:r1868 --- src/common/crypto.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/common/crypto.c b/src/common/crypto.c index ba6e99f02..1c265628a 100644 --- a/src/common/crypto.c +++ b/src/common/crypto.c @@ -1029,9 +1029,12 @@ void crypto_digest_get_digest(crypto_digest_env_t *digest, char *out, size_t out_len) { static char r[DIGEST_LEN]; + SHA_CTX tmpctx; tor_assert(digest && out); tor_assert(out_len <= DIGEST_LEN); - SHA1_Final(r, &digest->d); + /* memcpy into a temporary ctx, since SHA1_Final clears the context */ + memcpy(&tmpctx, &digest->d, sizeof(SHA_CTX)); + SHA1_Final(r, &tmpctx); memcpy(out, r, out_len); } -- cgit v1.2.3