diff options
| -rw-r--r-- | kerberos5/lib/libgssapi_krb5/pname_to_uid.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/kerberos5/lib/libgssapi_krb5/pname_to_uid.c b/kerberos5/lib/libgssapi_krb5/pname_to_uid.c index 52220f6..043ec22 100644 --- a/kerberos5/lib/libgssapi_krb5/pname_to_uid.c +++ b/kerberos5/lib/libgssapi_krb5/pname_to_uid.c @@ -26,6 +26,7 @@ */ /* $FreeBSD$ */ +#include <errno.h> #include <pwd.h> #include "krb5/gsskrb5_locl.h" @@ -37,8 +38,12 @@ _gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname, krb5_context context; krb5_const_principal name = (krb5_const_principal) pname; krb5_error_code kret; - char lname[MAXLOGNAME + 1], buf[128]; + char lname[MAXLOGNAME + 1], buf[1024], *bufp; struct passwd pwd, *pw; + size_t buflen; + int error; + OM_uint32 ret; + static size_t buflen_hint = 1024; GSSAPI_KRB5_INIT (&context); @@ -49,11 +54,30 @@ _gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname, } *minor_status = 0; - getpwnam_r(lname, &pwd, buf, sizeof(buf), &pw); + buflen = buflen_hint; + for (;;) { + pw = NULL; + bufp = buf; + if (buflen > sizeof(buf)) + bufp = malloc(buflen); + if (bufp == NULL) + break; + error = getpwnam_r(lname, &pwd, bufp, buflen, &pw); + if (error != ERANGE) + break; + if (buflen > sizeof(buf)) + free(bufp); + buflen += 1024; + if (buflen > buflen_hint) + buflen_hint = buflen; + } if (pw) { *uidp = pw->pw_uid; - return (GSS_S_COMPLETE); + ret = GSS_S_COMPLETE; } else { - return (GSS_S_FAILURE); + ret = GSS_S_FAILURE; } + if (bufp != NULL && buflen > sizeof(buf)) + free(bufp); + return (ret); } |
