X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=crypt.c;h=b754c0919e6fbccca77c0d662bddf59c6351fca6;hp=f33f769f6f035c18946c21fea064b37052802583;hb=2830b9f881898aaec073d5ba19e33482e30190bd;hpb=f0e41e36c3f1a3a5bb6ff66d92d2814391d8f908

diff --git a/crypt.c b/crypt.c
index f33f769f..b754c091 100644
--- a/crypt.c
+++ b/crypt.c
@@ -317,6 +317,23 @@ int sc_recv_bin_buffer(struct stream_cipher_context *scc, char *buf,
 	return ret;
 }
 
+void sc_crypt(struct stream_cipher *sc, struct iovec *src, struct iovec *dst)
+{
+	RC4_KEY *key = &sc->key;
+
+	*dst = (typeof(*dst)) {
+		/*
+		 * Add one for the terminating zero byte. Integer overflow is
+		 * no problem here as para_malloc() aborts when given a zero
+		 * size argument.
+		 */
+		.iov_base = para_malloc(src->iov_len + 1),
+		.iov_len = src->iov_len
+	};
+	RC4(key, src->iov_len, src->iov_base, dst->iov_base);
+	((char *)dst->iov_base)[dst->iov_len] = '\0';
+}
+
 void hash_function(const char *data, unsigned long len, unsigned char *hash)
 {
 	SHA_CTX c;