OpenSSL ABI change 20150612

[mancha]

On Fri, Jun 12, 2015 at 06:00:21AM +0000, mancha wrote:
> Hi Folks.
> 
> Today's OpenSSL releases 1.0.1n and 1.0.2b introduce ABI gremlins.
> Specifically, the HMAC_CTX stucture has a new "key_init" field of type
> integer:
> 
>   --- a/crypto/hmac/hmac.h
>   +++ b/crypto/hmac/hmac.h
>   @@ -75,6 +75,7 @@ typedef struct hmac_ctx_st {
>        EVP_MD_CTX o_ctx;
>        unsigned int key_length;
>        unsigned char key[HMAC_MAX_MD_CBLOCK];
>   +    int key_init;
>    } HMAC_CTX;
> 
> 
> This issue was identified by Dan McDonald of OmniOS (an illumos
> distribution) after their version of SSH (based on OpenSSH) broke. [1]
> 
> I've quickly reviewed things in OpenSSH and it seems to impact versions
> 4.7 through 6.5 inclusive (kex.h,v 1.62 makes it a NOP [2]).
> 
> Just a friendly heads up...
> 
> --mancha
> 
> ---
> [1] http://marc.info/?l=openssl-dev&m=143407129721271&w=2
> [2] http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.h.diff?r1=1.61&r2=1.62

By way of update, OpenSSL released versions 1.0.1o and 1.0.2c today to
resolve this issue.

https://twitter.com/mancha140/status/609386942489178112

--mancha
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