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Simply handling of SSH_CONNECTION PAM env var.

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Prompted by bz#3508: there's no need to cache the value of
sshpam_conninfo so remove the global.  While there, add check of
return value from pam_putenv.  ok djm@
This commit is contained in:
Darren Tucker 2022-12-19 18:49:51 +11:00
parent ed8444572a
commit b0b58222c7
No known key found for this signature in database
1 changed files with 11 additions and 5 deletions
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16
auth-pam.c
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@ -252,7 +252,6 @@ static Authctxt *sshpam_authctxt = NULL;
static const char *sshpam_password = NULL;
static char *sshpam_rhost = NULL;
static char *sshpam_laddr = NULL;
static char *sshpam_conninfo = NULL;
/* Some PAM implementations don't implement this */
#ifndef HAVE_PAM_GETENVLIST
@ -688,6 +687,7 @@ sshpam_init(struct ssh *ssh, Authctxt *authctxt)
{
const char *pam_user, *user = authctxt->user;
const char **ptr_pam_user = &pam_user;
int r;
#if defined(PAM_SUN_CODEBASE) && defined(PAM_MAX_RESP_SIZE)
/* Protect buggy PAM implementations from excessively long usernames */
@ -729,9 +729,6 @@ sshpam_init(struct ssh *ssh, Authctxt *authctxt)
options.use_dns));
sshpam_laddr = get_local_ipaddr(
ssh_packet_get_connection_in(ssh));
xasprintf(&sshpam_conninfo, "SSH_CONNECTION=%.50s %d %.50s %d",
ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
sshpam_laddr, ssh_local_port(ssh));
}
if (sshpam_rhost != NULL) {
debug("PAM: setting PAM_RHOST to \"%s\"", sshpam_rhost);
@ -742,8 +739,17 @@ sshpam_init(struct ssh *ssh, Authctxt *authctxt)
sshpam_handle = NULL;
return (-1);
}
}
if (ssh != NULL && sshpam_laddr != NULL) {
char *conninfo;
/* Put SSH_CONNECTION in the PAM environment too */
pam_putenv(sshpam_handle, sshpam_conninfo);
xasprintf(&conninfo, "SSH_CONNECTION=%.50s %d %.50s %d",
ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
sshpam_laddr, ssh_local_port(ssh));
if ((r = pam_putenv(sshpam_handle, conninfo)) != PAM_SUCCESS)
logit("pam_putenv: %s", pam_strerror(sshpam_handle, r));
free(conninfo);
}
#ifdef PAM_TTY_KLUDGE