File Transfer Protocol HASH Command for Cryptographic Hashes

Document Type Replaced Internet-Draft (individual)
Last updated 2015-10-14 (latest revision 2012-03-27)
Replaces draft-bryan-ftp-hash
Replaced by draft-bryan-ftpext-hash
Stream IETF
Intended RFC status Proposed Standard
Expired & archived
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Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-bryan-ftpext-hash
Telechat date
Responsible AD Pete Resnick
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.)