core: blob+stream: Store stream/blob hashes

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

core/blob_list.c

@@ -95,6 +95,9 @@ blob_list_dump(struct blob_list *lp)
     while (blob != NULL) {
         printf("blob %zd/%zd\n", count++, lp->count);
         printf("... length :: %zd\n", blob->length);
+        printf("... hash   :: ");
+        dump_bytes(blob->hash, SHA256_N_BYTES);
+
         printf("... data   :: ");
         dump_bytes(blob->data, blob->length < DUMP_SIZE
             ? blob->length

core/blob_subr.c

@@ -22,5 +22,6 @@ blob_allocate(struct data_stream *stmp)
         memcpy(bp->data, stmp->data, stmp->length);
     }
 
+    memcpy(bp->hash, stmp->hash, SHA256_N_BYTES);
     return bp;
 }

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;
 }