Slashes allowed in SHA1 digest for attachments?

I have a document attachment that has a slash in the digest and I believe it might be tripping up the replicator. Are slashes allowed in the digest?

I think I got my answer here:

That bug is about slashes in the attachment name, not the digest.

Slashes are going to be pretty common in digests, since each character has a 1/64 chance of being a slash. So I doubt any bug with slashes would have made it through testing.