[Asterisk-code-review] func aes: fix misuse of strlen on binary data (asterisk[13])

[Gianluca Merlo]

Gianluca Merlo has uploaded a new change for review.

  https://gerrit.asterisk.org/2439

Change subject: func_aes: fix misuse of strlen on binary data
......................................................................

func_aes: fix misuse of strlen on binary data

The encryption code for AES_ENCRYPT evaluates the length of the data to
be encoded in base64 using strlen. The data is binary, thus the length
of it can be underestimated at the first NULL character.
Reuse the write pointer offset to evaluate it, instead.

ASTERISK-25857 #close

Change-Id: If686b5d570473eb926693c73461177b35b13b186
---
M funcs/func_aes.c
1 file changed, 1 insertion(+), 1 deletion(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/39/2439/1

diff --git a/funcs/func_aes.c b/funcs/func_aes.c
index 3338118..f4a8d06 100644
--- a/funcs/func_aes.c
+++ b/funcs/func_aes.c
@@ -146,7 +146,7 @@
 	}
 
 	if (encrypt) {                            /* if encrypting encode result to base64 */
-		ast_base64encode(buf, (unsigned char *) tmp, strlen(tmp), len);
+		ast_base64encode(buf, (unsigned char *) tmp, tmpP - tmp, len);
 	} else {
 		memcpy(buf, tmp, len);
 	}

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: If686b5d570473eb926693c73461177b35b13b186
Gerrit-PatchSet: 1
Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-Owner: Gianluca Merlo <gianluca.merlo at gmail.com>