1 files changed, 53 insertions, 0 deletions
diff --git a/src/libnsss/nsss_switch_pwd_read.c b/src/libnsss/nsss_switch_pwd_read.c
new file mode 100644
index 0000000..936b0f4
--- /dev/null
+++ b/src/libnsss/nsss_switch_pwd_read.c
@@ -0,0 +1,53 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <skalibs/posixplz.h>
+#include <skalibs/uint32.h>
+#include <skalibs/error.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/unix-timed.h>
+#include <nsss/pwd-def.h>
+#include "nsss-switch-internal.h"
+
+/*
+   Expects:
+     4 bytes pw_uid
+     4 bytes pw_gid
+     4 bytes total length of strings (including \0's)
+     \0-terminated pw_name
+     \0-terminated pw_passwd
+     \0-terminated pw_gecos
+     \0-terminated pw_dir
+     \0-terminated pw_shell
+*/
+
+int nsss_switch_pwd_read (buffer *b, struct passwd *pw, stralloc *sa, tain_t const *deadline, tain_t *stamp)
+{
+  struct passwd pwtmp ;
+  uint32_t total, len, x ;
+  char *p ;
+  char buf[12] ;
+  if (!buffer_timed_get(b, buf, 12, deadline, stamp)) return 0 ;
+  uint32_unpack_big(buf, &x) ; pwtmp.pw_uid = x ;
+  uint32_unpack_big(buf + 4, &x) ; pwtmp.pw_gid = x ;
+  uint32_unpack_big(buf + 8, &total) ;
+  if (!stralloc_readyplus(sa, total)) return 0 ;
+  if (!buffer_timed_get(b, sa->s + sa->len, total, deadline, stamp)) return 0 ;
+  if (sa->s[sa->len + total - 1]) return (errno = EPROTO, 0) ;
+  p = sa->s + sa->len ; len = total ;
+  pwtmp.pw_name = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
+  if (!len) return (errno = EPROTO, 0) ;
+  pwtmp.pw_passwd = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
+  if (!len) return (errno = EPROTO, 0) ;
+  pwtmp.pw_gecos = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
+  if (!len) return (errno = EPROTO, 0) ;
+  pwtmp.pw_dir = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
+  if (!len) return (errno = EPROTO, 0) ;
+  pwtmp.pw_shell = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
+  if (len) return (errno = EPROTO, 0) ;
+  sa->len += total ;
+  *pw = pwtmp ;
+  return 1 ;
+}