X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Fimport-util.c;h=001a8a37e81667746af704a7d38ff2c44300e04a;hb=30ab6a0fc1bb950c4dcd90dcd3dfe00a810c7fc1;hp=660d92ac5dea5560b64d9f6cd12807dd6a58d9fd;hpb=7f444afa1b62920265fec99a61cb4dc53d521956;p=elogind.git

diff --git a/src/shared/import-util.c b/src/shared/import-util.c
index 660d92ac5..001a8a37e 100644
--- a/src/shared/import-util.c
+++ b/src/shared/import-util.c
@@ -150,6 +150,27 @@ int raw_strip_suffixes(const char *p, char **ret) {
         return 0;
 }
 
+bool dkr_digest_is_valid(const char *digest) {
+        /* 7 chars for prefix, 64 chars for the digest itself */
+        if (strlen(digest) != 71)
+                return false;
+
+        return startswith(digest, "sha256:") && in_charset(digest + 7, "0123456789abcdef");
+}
+
+bool dkr_ref_is_valid(const char *ref) {
+        const char *colon;
+
+        if (isempty(ref))
+                return false;
+
+        colon = strchr(ref, ':');
+        if (!colon)
+                return filename_is_valid(ref);
+
+        return dkr_digest_is_valid(ref);
+}
+
 bool dkr_name_is_valid(const char *name) {
         const char *slash, *p;