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File Transfer Protocol HASH Command for Cryptographic Hashes

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Anthony Bryan , Tim Kosse , Daniel Stenberg
Last updated 2010-11-29 (Latest revision 2010-10-25)
Replaces draft-twine-ftpmd5
Replaced by draft-ietf-ftpext2-hash
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-ftpext2-hash
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The File Transfer Protocol does not offer any method to verify the integrity of a transferred file, nor can two files be compared against each other without actually transferring them first. Cryptographic hashes are a possible solution to this problem. In the past, several attempts have been made to add commands to obtain checksums and hashes, however none have been formally specified, leading to non-interoperability and confusion. To solve these issues, this document specifies a new FTP command to be used by clients to request cryptographic hashes of files.


Anthony Bryan
Tim Kosse
Daniel Stenberg

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)