core: blob+stream: Store stream/blob hashes

Signed-off-by: Chloe M. <chloe@mirocom.org>

core/stream_file.c

@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <openssl/sha.h>
 #include "blobchain/memlib.h"
 #include "blobchain/stream.h"
 
@@ -56,6 +57,7 @@ stream_from_file(struct data_stream *stmp, const char *path)
         return -1;
     }
 
+    SHA256(stmp->data, stmp->length, stmp->hash);
     return 0;
 }