[OpenSIPS-Devel] [opensips] Added b64encode, b64decode, and xor string transformations (#565)

[Jarrod Baumann]

Here is an example of the string transformations in use:

## opensips.cfg specifics

```
modparam("cfgutils", "varset", "secret=s:90hf230fh209fh209")
 
route {
  ...
  xlog("L_INFO", "Call-ID            : $ci\n");
  $var(xor) = $(ci{s.xor, $var(secret)});
  xlog("L_INFO", "Call-ID XOR        : $var(xor)\n");
  $var(b64encoded) = $(var(xor){s.b64encode});
  xlog("L_INFO", "Call-ID b64encoded : $var(b64encoded)\n");
  $var(b64decoded) = $(var(b64encoded){s.b64decode});
  xlog("L_INFO", "Call-ID b64decoded : $var(b64decoded)\n");
  xlog("L_INFO", "Call-ID XOR        : $(var(b64decoded){s.xor, $var(secret)})\n");
}
```

## log output
```
Jul  1 17:33:34 localhost opensips: Call-ID            : ZjdiZDlmNTY2NDk4ZWNiYzNlNGVlNzA4ODM3NTFmNjg
Jul  1 17:33:34 localhost opensips: Call-ID XOR        : cZ#014#017hw\#013&fi#013(,Y#004cn~#001?H}\(/d\w#034)#006}t#003&2t^~#014#017
Jul  1 17:33:34 localhost opensips: Call-ID b64encoded : Y1oMD2h3XAsmZmkLKCxZBGNufgE/SH1cKC9kXHccKQZ/fXQDJjJ0Xn4MDw==
Jul  1 17:33:34 localhost opensips: Call-ID b64decoded : cZ#014#017hw\#013&fi#013(,Y#004cn~#001?H}\(/d\w#034)#006}t#003&2t^~#014#017
Jul  1 17:33:34 localhost opensips: Call-ID XOR        : ZjdiZDlmNTY2NDk4ZWNiYzNlNGVlNzA4ODM3NTFmNjg
```
You can view, comment on, or merge this pull request online at:

  https://github.com/OpenSIPS/opensips/pull/565

-- Commit Summary --

  * Added b64encode, b64decode, and xor string transformations

-- File Changes --

    M transformations.c (96)
    M transformations.h (3)

-- Patch Links --

https://github.com/OpenSIPS/opensips/pull/565.patch
https://github.com/OpenSIPS/opensips/pull/565.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/OpenSIPS/opensips/pull/565
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