sslwrap | Simple wrappers around OpenSSL and SChannel | SSH Utils library
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kandi X-RAY | sslwrap Summary
Simple wrappers around OpenSSL and SChannel.
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QUESTION
I am having a partial failure with my code in that I can establish non-secure connections to places such as www.hp.com and www.google.com, but when adding SSL to the socket I can no longer connect to www.google.com even though I can still connect to www.hp.com
In response to this I did a fair bit of research and came up with mixed answers. I tried testing different sites, and the results were spotty. So I feel like I am missing a crucial portion of the SSL handshake here that is not readily apparent (at least to me).
...ANSWER
Answered 2017-Jun-28 at 11:06strncpy(si.Host, "www.google.com", 10);
10 is too short; just use strcpy()
here.
[also a strong advice: never use strncpy() , at least until you know what it does ...]
why is strncpy() considered evil? Mostly because it is confusing, at least for novice users. How?
using strncpy(dst, src, siz);
:
- If there is sufficient space in the destination buffer
(strlen(src) < siz)
, the restof the buffer will befilled with nullbytes - if there is not enough space
(strlen(src) >= siz)
, no more thansiz
bytes will be written to*dst
, but the copied string wil not be nul-terminated.
The first case is not that important, a few cycles are wasted for writing the extra nulls. The second case can be disastrous if you expect the resulting string to be null-terminated. (most people do) This is why strncpy()
raises red flags.
How to avoid strncpy()
? There are a few ways. one of the simplest:
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