189b2b4547
Newer gcc doesn't really like strncpy producing following warnings: warning: ‘strncpy’ specified bound depends on the length of the source argument I switched the function to the plain old strcpy as strncpy is not necessary anyway because we allocate the destination buffer using size returned from strlen.
85 lines
2.7 KiB
Go
85 lines
2.7 KiB
Go
// Copied from https://github.com/amoghe/go-crypt/blob/b3e291286513a0c993f7c4dd7060d327d2d56143/crypt_r.go
|
|
// Original sources are under MIT license:
|
|
// The MIT License (MIT)
|
|
//
|
|
// Copyright (c) 2015 Akshay Moghe
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
//
|
|
// Package crypt provides wrappers around functions available in crypt.h
|
|
//
|
|
// It wraps around the GNU specific extension (crypt_r) when it is available
|
|
// (i.e. where GOOS=linux). This makes the go function reentrant (and thus
|
|
// callable from concurrent goroutines).
|
|
package crypt
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
/*
|
|
#cgo LDFLAGS: -lcrypt
|
|
|
|
// this is needed for Ubuntu
|
|
#define _GNU_SOURCE
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <crypt.h>
|
|
|
|
char *gnu_ext_crypt(char *pass, char *salt) {
|
|
char *enc = NULL;
|
|
char *ret = NULL;
|
|
struct crypt_data data;
|
|
data.initialized = 0;
|
|
|
|
enc = crypt_r(pass, salt, &data);
|
|
if(enc == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
ret = (char *)malloc((strlen(enc)+1) * sizeof(char)); // for trailing null
|
|
strcpy(ret, enc);
|
|
ret[strlen(enc)]= '\0';
|
|
|
|
return ret;
|
|
}
|
|
*/
|
|
import "C"
|
|
|
|
// Crypt provides a wrapper around the glibc crypt_r() function.
|
|
// For the meaning of the arguments, refer to the package README.
|
|
func crypt(pass, salt string) (string, error) {
|
|
c_pass := C.CString(pass)
|
|
defer C.free(unsafe.Pointer(c_pass))
|
|
|
|
c_salt := C.CString(salt)
|
|
defer C.free(unsafe.Pointer(c_salt))
|
|
|
|
c_enc, err := C.gnu_ext_crypt(c_pass, c_salt)
|
|
if c_enc == nil {
|
|
return "", err
|
|
}
|
|
defer C.free(unsafe.Pointer(c_enc))
|
|
|
|
// Return nil error if the string is non-nil.
|
|
// As per the errno.h manpage, functions are allowed to set errno
|
|
// on success. Caller should ignore errno on success.
|
|
return C.GoString(c_enc), nil
|
|
}
|