Do not link integritysetup and veritysetup with pwquality.

These tools do not read passphrases, no need to link to these libraries.

Just move the helper code that introduced this dependence as a side-effect.

Fixes: #677

src/utils_tools.c

@@ -493,3 +493,59 @@ int tools_reencrypt_progress(uint64_t size, uint64_t offset, void *usrptr)
 
 	return r;
 }
+
+int tools_read_mk(const char *file, char **key, int keysize)
+{
+	int fd = -1, r = -EINVAL;
+
+	if (keysize <= 0 || !key)
+		return -EINVAL;
+
+	*key = crypt_safe_alloc(keysize);
+	if (!*key)
+		return -ENOMEM;
+
+	fd = open(file, O_RDONLY);
+	if (fd == -1) {
+		log_err(_("Cannot read keyfile %s."), file);
+		goto out;
+	}
+
+	if (read_buffer(fd, *key, keysize) != keysize) {
+		log_err(_("Cannot read %d bytes from keyfile %s."), keysize, file);
+		goto out;
+	}
+	r = 0;
+out:
+	if (fd != -1)
+		close(fd);
+
+	if (r) {
+		crypt_safe_free(*key);
+		*key = NULL;
+	}
+
+	return r;
+}
+
+int tools_write_mk(const char *file, const char *key, int keysize)
+{
+	int fd, r = -EINVAL;
+
+	if (keysize <= 0 || !key)
+		return -EINVAL;
+
+	fd = open(file, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR);
+	if (fd < 0) {
+		log_err(_("Cannot open keyfile %s for write."), file);
+		return r;
+	}
+
+	if (write_buffer(fd, key, keysize) == keysize)
+		r = 0;
+	else
+		log_err(_("Cannot write to keyfile %s."), file);
+
+	close(fd);
+	return r;
+}