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improve a comment in memwipe

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Nick Mathewson 2015-12-10 09:03:47 -05:00
parent 7186e2a943
commit ce3b7ddb54
1 changed files with 5 additions and 1 deletions
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6
src/common/crypto.c
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@ -2817,7 +2817,11 @@ memwipe(void *mem, uint8_t byte, size_t sz)
* variable. It's an elaborate ruse to trick the compiler into not * variable. It's an elaborate ruse to trick the compiler into not
* optimizing out the "wipe this memory" code. Read it if you like zany * optimizing out the "wipe this memory" code. Read it if you like zany
* programming tricks! In later versions of Tor, we should look for better * programming tricks! In later versions of Tor, we should look for better
* not-optimized-out memory wiping stuff. */ * not-optimized-out memory wiping stuff...
*
* ...or maybe not. In practice, there are pure-asm implementations of
* OPENSSL_cleanse() on most platforms, which ought to do the job.
**/
OPENSSL_cleanse(mem, sz); OPENSSL_cleanse(mem, sz);
/* Just in case some caller of memwipe() is relying on getting a buffer /* Just in case some caller of memwipe() is relying on getting a buffer
* filled with a particular value, fill the buffer. * filled with a particular value, fill the buffer.