diff options
Diffstat (limited to 'cloudinit/util.py')
| -rw-r--r-- | cloudinit/util.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/cloudinit/util.py b/cloudinit/util.py index fc777b82..2eb79d33 100644 --- a/cloudinit/util.py +++ b/cloudinit/util.py @@ -1725,7 +1725,7 @@ def logexc(log, msg, *args): log.debug(msg, exc_info=exc_info, *args) -def hash_blob(blob, routine, mlen=None): +def hash_blob(blob, routine: str, mlen=None) -> str: hasher = hashlib.new(routine) hasher.update(encode_text(blob)) digest = hasher.hexdigest() @@ -1736,6 +1736,18 @@ def hash_blob(blob, routine, mlen=None): return digest +def hash_buffer(f: io.BufferedIOBase) -> bytes: + """Hash the content of a binary buffer using SHA1. + + @param f: buffered binary stream to hash. + @return: digested data as bytes. + """ + hasher = hashlib.sha1() + for chunk in iter(lambda: f.read(io.DEFAULT_BUFFER_SIZE), b""): + hasher.update(chunk) + return hasher.digest() + + def is_user(name): try: if pwd.getpwnam(name): |