libssh2\_userauth\_publickey(3) libssh2 libssh2\_userauth\_publickey(3)

# [NAME](#NAME)

libssh2\_userauth\_publickey - authenticate using a callback function

# [SYNOPSIS](#SYNOPSIS)

```
#include <libssh2.h>
int
libssh2_userauth_publickey(LIBSSH2_SESSION *session,


                           const char *user,


                           const unsigned char *pubkeydata,


                           size_t pubkeydata_len,


                           sign_callback,


                           void **abstract);
```

# [DESCRIPTION](#DESCRIPTION)

Authenticate with the *sign\_callback* callback that matches the prototype below

# [CALLBACK](#CALLBACK)

```
int name(LIBSSH2_SESSION *session, unsigned char **sig, size_t *sig_len,


         const unsigned char *data, size_t data_len, void **abstract);
```

This function gets called...

# [RETURN VALUE](#RETURN_VALUE)

Return 0 on success or negative on failure.

# [SEE ALSO](#SEE_ALSO)

[**libssh2\_userauth\_publickey\_fromfile\_ex(3)**](/man/os/libssh2/libssh2_userauth_publickey_fromfile_ex.3)

1 Jun 2007 libssh2 0.15

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Document: libssh2_userauth_publickey(3) from libssh2 1.11.1-r10 (Chainguard OS)
Source: https://github.com/libssh2/libssh2.git