fix segfault when gpg is not present.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>

diff --git a/crypt.c b/crypt.c
index e137f2c..2273165 100644 (file)
--- a/crypt.c
+++ b/crypt.c
@@ -560,18 +560,15 @@ static char *encrypt_gpgme_object(gpgme_data_t plaintext, gpgme_key_t *rset,
 static int get_micalg(gpgme_ctx_t ctx, char *buf, ssize_t buflen)
 {
     gpgme_sign_result_t result = NULL;
-    const char *algorithm_name = NULL;
+    const char *alg = NULL;
 
-    *buf = '\0';
     result = gpgme_op_sign_result(ctx);
-    if (result) {
-        algorithm_name = gpgme_hash_algo_name (result->signatures->hash_algo);
-        if (algorithm_name) {
-            m_strcpy(buf, buflen, algorithm_name);
-        }
+    if (result && result->signatures) {
+        alg = gpgme_hash_algo_name(result->signatures->hash_algo);
     }
+    m_strcpy(buf, buflen, NONULL(alg));
 
-    return *buf ? 0 : -1;
+    return alg ? 0 : -1;
 }
 
 static void print_time(time_t t, STATE *s)