X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fopenssl%2Fdigest.c;h=0e600b9d07d31a0e83bfcecab08809442fbd467d;hp=9699d37b5d94623ff00edbb5da3d2fcdb6a8a035;hb=d4410d0cce40929db9a0ce7042ef962f1867234d;hpb=5b07039b0712bee0f19749d63116a10fb08a2d8b

diff --git a/src/openssl/digest.c b/src/openssl/digest.c
index 9699d37b..0e600b9d 100644
--- a/src/openssl/digest.c
+++ b/src/openssl/digest.c
@@ -88,7 +88,10 @@ bool digest_create(digest_t *digest, const void *indata, size_t inlen, void *out
 	unsigned char tmpdata[len];
 
 	if(digest->key) {
-		HMAC(digest->digest, digest->key, digest->keylength, indata, inlen, tmpdata, NULL);
+		if(!HMAC(digest->digest, digest->key, digest->keylength, indata, inlen, tmpdata, NULL)) {
+			logger(DEBUG_ALWAYS, LOG_DEBUG, "Error creating digest: %s", ERR_error_string(ERR_get_error(), NULL));
+			return false;
+		}
 	} else {
 		EVP_MD_CTX ctx;
 
@@ -112,14 +115,23 @@ bool digest_verify(digest_t *digest, const void *indata, size_t inlen, const voi
 }
 
 int digest_get_nid(const digest_t *digest) {
-	return digest->digest ? digest->digest->type : 0;
+	if(!digest || !digest->digest)
+		return 0;
+
+	return digest->digest->type;
 }
 
 size_t digest_keylength(const digest_t *digest) {
+	if(!digest || !digest->digest)
+		return 0;
+
 	return digest->digest->md_size;
 }
 
 size_t digest_length(const digest_t *digest) {
+	if(!digest)
+		return 0;
+
 	return digest->maclength;
 }