---
name: "sexp-conv.nettle"
section: "1"
platform: "linux"
package: "nettle-bin"
version: "1.15-5"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/sexp-conv.nettle"
---

# sexp-conv.nettle(1)

convert s-expression to a different encoding

## NAME

sexp-conv - convert s-expression to a different encoding

## SYNOPSIS

Conversion:\
 **sexp-conv** \[*OPTION*\]... \< *INPUT-SEXP*

Fingerprinting:\
 **sexp-conv --hash\[=*algorithm*\]** \[*OPTION*\]... \< *INPUT-SEXP*

## DESCRIPTION

This manual page documents briefly the **sexp-conv** command. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. Instead, it has documentation in the GNU Info format; see below.

**sexp-conv** is a program that converts S-expressions. It automatically detects the s-expression syntax variant of the input. It is primarily used by the \`lsh' packages, which stores keys and most other objects on disk in that format, but may be of other use as well.

## OPTIONS

This program follows the usual GNU command line syntax, with long options starting with two dashes (\`-'). A summary of options is included below. For a complete description, see the Info files.

- **--hash=*algorithm***

  Output only the hash of the s-expression, using *algorithm* (default: sha1).

- **--raw-hash**

  Alias for --hash, for compatibility with lsh 1.x.

- **--once**

  Process exactly one s-expression.

- **--spki-hash**

  Output an SPKI hash for the object. **Not yet implemented.**

- **-s, --syntax=*format***

  Variant of S-expression to output. Valid S-expression formats are: transport, canonical (binary), advanced, and hex (same as advanced, but numbers in hex instead of base64).

- **-w, --width=*width***

  Limit output to lines of *width* characters (has no effect on canonical syntax). Zero means no limit.

- **-?, --help**

  Show summary of options.

- **-V, --version**

  Show version of program.

## SEE ALSO

[**ssh-conv**(1)](/ssh-conv/1.md), [**lsh**(1)](/lsh/1.md), [**lshd**(8)](/lshd/8.md), http://theworld.com/~cme/spki.txt.\
 The programs are documented fully by the *sexp* section under the *Getting Started* header of the lsh info page, available via the Info system.

## BUGS

This program should be documented in the nettle manual, not in the lsh manual.

## AUTHOR

This manual page was originally written by Timshel Knoll \<timshel@debian.org\>, for the Debian GNU/Linux system (but may be used by others). Edited by Magnus Holmgren \<magnus@kibibyte.se\>.