1 files changed, 57 insertions, 0 deletions
diff --git a/src/tool_metalink.h b/src/tool_metalink.h
index f7a0abe84..0c9d589eb 100644
--- a/src/tool_metalink.h
+++ b/src/tool_metalink.h
@@ -56,4 +56,61 @@ int parse_metalink(struct Configurable *config, const char *infile);
  */
 int check_metalink_content_type(const char *content_type);
 
+typedef void (* Curl_digest_init_func)(void *context);
+typedef void (* Curl_digest_update_func)(void *context,
+                                         const unsigned char *data,
+                                         unsigned int len);
+typedef void (* Curl_digest_final_func)(unsigned char *result, void *context);
+
+typedef struct {
+  Curl_digest_init_func     digest_init;   /* Initialize context procedure */
+  Curl_digest_update_func   digest_update; /* Update context with data */
+  Curl_digest_final_func    digest_final;  /* Get final result procedure */
+  unsigned int           digest_ctxtsize;  /* Context structure size */
+  unsigned int           digest_resultlen; /* Result length (bytes) */
+} digest_params;
+
+typedef struct {
+  const digest_params   *digest_hash;      /* Hash function definition */
+  void                  *digest_hashctx;   /* Hash function context */
+} digest_context;
+
+extern const digest_params MD5_DIGEST_PARAMS[1];
+extern const digest_params SHA1_DIGEST_PARAMS[1];
+extern const digest_params SHA256_DIGEST_PARAMS[1];
+
+digest_context * Curl_digest_init(const digest_params *dparams);
+int Curl_digest_update(digest_context *context,
+                       const unsigned char *data,
+                       unsigned int len);
+int Curl_digest_final(digest_context *context, unsigned char *result);
+
+typedef struct {
+  const char *hash_name;
+  const digest_params *dparams;
+} metalink_digest_def;
+
+typedef struct {
+  const char *alias_name;
+  const metalink_digest_def *digest_def;
+} metalink_digest_alias;
+
+/*
+ * Check checksum of file denoted by filename.
+ *
+ * This function returns 1 if the checksum matches or one of the
+ * following integers:
+ *
+ * 0:
+ *   Checksum didn't match.
+ * -1:
+ *   Could not open file; or could not read data from file.
+ * -2:
+ *   No checksum in Metalink supported; or Metalink does not contain
+ *   checksum.
+ */
+int metalink_check_hash(struct Configurable *config,
+                        struct metalinkfile *mlfile,
+                        const char *filename);
+
 #endif /* HEADER_CURL_TOOL_METALINK_H */