fetch: indicate an error if the connection was terminated prematurely

[project/uclient.git] / uclient-utils.c

diff --git a/uclient-utils.c b/uclient-utils.c
index 0d09974..a375eea 100644 (file)
--- a/uclient-utils.c
+++ b/uclient-utils.c
@@ -1,7 +1,28 @@
+/*
+ * uclient - ustream based protocol client library
+ *
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
 #include <ctype.h>
 
+#include <libubox/md5.h>
+#include <libubox/utils.h>
+
 #include "uclient-utils.h"
 
 static const char *b64 =
@@ -75,3 +96,89 @@ int uclient_urldecode(const char *in, char *out, bool decode_plus)
        *out = 0;
        return ret;
 }
+
+static char hex_digit(char val)
+{
+       val += val > 9 ? 'a' - 10 : '0';
+       return val;
+}
+
+void bin_to_hex(char *dest, const void *buf, int len)
+{
+       const uint8_t *data = buf;
+       int i;
+
+       for (i = 0; i < len; i++) {
+               *(dest++) = hex_digit(data[i] >> 4);
+               *(dest++) = hex_digit(data[i] & 0xf);
+       }
+       *dest = 0;
+}
+
+static void http_create_hash(char *dest, const char * const * str, int n_str)
+{
+       uint32_t hash[4];
+       md5_ctx_t md5;
+       int i;
+
+       md5_begin(&md5);
+       for (i = 0; i < n_str; i++) {
+               if (i)
+                       md5_hash(":", 1, &md5);
+               md5_hash(str[i], strlen(str[i]), &md5);
+       }
+       md5_end(hash, &md5);
+       bin_to_hex(dest, &hash, sizeof(hash));
+}
+
+void http_digest_calculate_auth_hash(char *dest, const char *user, const char *realm, const char *password)
+{
+       const char *hash_str[] = {
+               user,
+               realm,
+               password
+       };
+
+       http_create_hash(dest, hash_str, ARRAY_SIZE(hash_str));
+}
+
+void http_digest_calculate_response(char *dest, const struct http_digest_data *data)
+{
+       const char *h_a2_strings[] = {
+               data->method,
+               data->uri,
+       };
+       const char *resp_strings[] = {
+               data->auth_hash,
+               data->nonce,
+               data->nc,
+               data->cnonce,
+               data->qop,
+               dest, /* initialized to H(A2) first */
+       };
+
+       http_create_hash(dest, h_a2_strings, ARRAY_SIZE(h_a2_strings));
+       http_create_hash(dest, resp_strings, ARRAY_SIZE(resp_strings));
+}
+
+char *uclient_get_url_filename(const char *url, const char *default_name)
+{
+       const char *str;
+       int len = strcspn(url, ";&");
+
+       while (len > 0 && url[len - 1] == '/')
+               len--;
+
+       for (str = url + len - 1; str >= url; str--) {
+               if (*str == '/')
+                       break;
+       }
+
+       str++;
+       len -= str - url;
+
+       if (len > 0)
+               return strncpy(calloc(1, len + 1), str, len);
+
+       return strdup(default_name);
+}