On Thu, Apr 19, 2012 at 09:08:48PM +0200, Kurt Roeckx wrote:
> On Wed, Apr 18, 2012 at 08:04:28PM +0200, Andy Polyakov via RT wrote:
> > > I've had 2 users report a crash in RC4() on x86_64. The
> > > backtrace looks like:
> > > #0 RC4 () at rc4-x86_64.s:343
> > > #1 0x000000000000012d in ?? ()
> > > #2 0x00000000000000df in ?? ()
> > > #3 0x00000000020b5660 in ?? ()
> > > #4 0x00007fc075f6a9c9 in rc4_hmac_md5_cipher (ctx=<optimized out>,
> > > out=0x20aae98
> > > ".\324\300\377AE'|#\242\300\233\025T\341\002}\237\242\240\273G\260\257\214z\321\001HK«RA\257HC0\"0\257N*1C/,$\252-N1&%&1\261\"/0C*'C\246-\"!/&C*\nb%
> > > SO\261\067\303\060,17^'*\260\063/\":C7+\261&\"'^1&%\246\061&-
> > > &0C\267+1&\"'^1\246%0C.6/7\252\"33&-'C\266-0&/& 7\303
> > > +*/'1&\255C-\".&03\242
> > > &C6*'3\257\066\060C/*07\316&;7&-'&\247C*R[-/&\265&/^RC ,\255"...,
> > > in=<optimized out>, len=0) at e_rc4_hmac_md5.c:163
> > > #5 0x00007fc076272b8f in tls1_enc (s=0x209c120, send=1) at t1_enc.c:828
> > > #6 0x00007fc076269e18 in do_ssl3_write (s=0x209c120, type=23,
> > > buf=0x209cf34 "2 OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR
> > > LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES
> > > THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED
> > > I18NLEVEL=1 CON"..., len=285, create_empty_fragment=0) at s3_pkt.c:808
> > > #7 0x00007fc07626a144 in ssl3_write_bytes (s=0x209c120, type=23,
> > > buf_=0x209cf34, len=<optimized out>) at s3_pkt.c:605
> > >
> > >
> > > This looks simular to the AES problem with had, with a length of 0?
> > >
> > >
> > > More details are at:
> > > http://bugs.debian.org/666405
> >
> > http://cvs.openssl.org/chngview?cn=22424 is combined patch.
>
> This fails like this on non-i386/x86_64 arches:
> ../libcrypto.a(e_rc4_hmac_md5.o): In function `EVP_rc4_hmac_md5':
> /build/buildd-openssl_1.0.1a-1-ia64-b35uCp/openssl-1.0.1a/crypto/evp/e_rc4_hmac_md5.c:294:
> undefined reference to `OPENSSL_ia32cap_P'
> /build/buildd-openssl_1.0.1a-1-ia64-b35uCp/openssl-1.0.1a/crypto/evp/e_rc4_hmac_md5.c:294:
> undefined reference to `OPENSSL_ia32cap_P'
I've used this patch to fix it:
Index: openssl-1.0.1a/crypto/evp/e_rc4_hmac_md5.c
===================================================================
--- openssl-1.0.1a.orig/crypto/evp/e_rc4_hmac_md5.c 2012-04-18
19:51:33.000000000 +0200
+++ openssl-1.0.1a/crypto/evp/e_rc4_hmac_md5.c 2012-04-19 21:53:36.000000000
+0200
@@ -289,8 +289,14 @@
const EVP_CIPHER *EVP_rc4_hmac_md5(void)
{
+#if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
+ defined(__INTEL__) || \
+ defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) ||
defined(_M_X64)
extern unsigned int OPENSSL_ia32cap_P[];
/* RC4_CHAR flag ------------vvvvv */
return(OPENSSL_ia32cap_P[0]&(1<<20) ? NULL : &r4_hmac_md5_cipher);
+#else
+ return(&r4_hmac_md5_cipher);
+#endif
}
#endif
Kurt
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