---
name: "sasl_decode"
section: "3"
platform: "linux"
package: "libsasl2-dev"
version: "2.1.28+dfsg1-9"
release: "Debian 13 (Trixie)"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/sasl_decode"
---

# sasl\_decode(3)

Cyrus SASL documentation

## NAME

sasl\_decode - Cyrus SASL documentation

## SYNOPSIS

```
#include <sasl/sasl.h>
int sasl_decode(sasl_conn_t *conn,
               const char * input,
                unsigned inputlen,
               const char ** output,
               unsigned * outputlen);
```

## DESCRIPTION

- **int sasl\_decode(sasl\_conn\_t \*conn,**

  - **const char \* input,**

  - **unsigned inputlen,**

  - **const char \*\* output,**

  - **unsigned \* outputlen);**

  **sasl\_decode** decodes   data  received.  After  successful authentication this function should be called on all  data received.  It  decodes  the data from encrypted or signed form to plain data. If there was no security layer negotiated the *output* is identical to the *input*.

  - **Parameters**

    - •

      **conn** – is the SASL connection context

    - •

      **output** – contains the decoded data and is allocated/freed by the library.

    - •

      **outputlen** – length of *output*.

  One should not give  sasl\_decode  more  data  than  the negotiated *maxbufsize* (see *[sasl\_getprop(3)](/sasl_getprop/3.md)*).

  Note  that  sasl\_decode  can  succeed and outputlen can be zero. If this is the case simply wait for  more  data  and call sasl\_decode again.

## RETURN VALUE

SASL  callback  functions should return SASL return codes. See sasl.h for a complete list. *SASL\_OK* indicates success.

Other return codes indicate errors and should be handled.

## SEE ALSO

*RFC 4422*,:saslman:*[sasl(3)](/sasl/3.md)*, *[sasl\_encode(3)](/sasl_encode/3.md)*, *[sasl\_errors(3)](/sasl_errors/3.md)*

## AUTHOR

The Cyrus Team

## COPYRIGHT

1993-2016, The Cyrus Team