Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

I guess we need to look at OpenWrt for MIPS-versions of the libraries.

We do have a device running on MIPS, and linking the OpenWrt-versions of
libcrypto.a and libssl.a (with our framework-binary) works like a charm.


Thanks and Regards,
Ajay

On Mon, Oct 17, 2016 at 7:30 PM, craig_we...@trendmicro.com <
craig_we...@trendmicro.com> wrote:

> I’m interested in the rest of this story.  Does compiling a separate
> library for linking work for you now?  Our product runs on two platforms:
> one Pentium-based and one Mips-based. The Pentium build works fine but the
> Mips build fails at link time with unresolved function references.
>
>
>
> *From:* openssl-users [mailto:openssl-users-boun...@openssl.org] *On
> Behalf Of *Ajay Garg
> *Sent:* Sunday, October 16, 2016 10:16 PM
> *To:* openssl-users@openssl.org
> *Subject:* Re: [openssl-users] Where to find definitions of certain
> functions
>
>
>
> Aah... I guess I was being an idiot.
>
> I just realize that the recommended/best/easier way is to compile openssl
> as a separate library (enabling/disabling/removing features as required),
> and then link this library to our application-binary.
>
> Thanks a ton Salz, you have saved me a LOT of hours :)
>
> Thanks and Regards,
>
> Ajay
>
>
>
> On Sun, Oct 16, 2016 at 10:09 PM, Salz, Rich <rs...@akamai.com> wrote:
>
>
> > Also, I am not using Makefiles, rather compiling each "c unit" using gcc
> using first-principles.
> > Could that be an issue?
>
> Probably.
>
> Only "make" is supported.  You are on your own.
>
>
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>
>
>
> --
>
> Regards,
> Ajay
>
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Re: [openssl-users] Where to find definitions of certain functions

[craig_we...@trendmicro.com]

I’m interested in the rest of this story.  Does compiling a separate library 
for linking work for you now?  Our product runs on two platforms: one 
Pentium-based and one Mips-based. The Pentium build works fine but the Mips 
build fails at link time with unresolved function references.

From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf Of 
Ajay Garg
Sent: Sunday, October 16, 2016 10:16 PM
To: openssl-users@openssl.org
Subject: Re: [openssl-users] Where to find definitions of certain functions

Aah... I guess I was being an idiot.
I just realize that the recommended/best/easier way is to compile openssl as a 
separate library (enabling/disabling/removing features as required), and then 
link this library to our application-binary.

Thanks a ton Salz, you have saved me a LOT of hours :)

Thanks and Regards,
Ajay

On Sun, Oct 16, 2016 at 10:09 PM, Salz, Rich 
<rs...@akamai.com<mailto:rs...@akamai.com>> wrote:

> Also, I am not using Makefiles, rather compiling each "c unit" using gcc 
> using first-principles.
> Could that be an issue?

Probably.

Only "make" is supported.  You are on your own.

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Ajay


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Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

Aah... I guess I was being an idiot.

I just realize that the recommended/best/easier way is to compile openssl
as a separate library (enabling/disabling/removing features as required),
and then link this library to our application-binary.


Thanks a ton Salz, you have saved me a LOT of hours :)


Thanks and Regards,
Ajay

On Sun, Oct 16, 2016 at 10:09 PM, Salz, Rich  wrote:

>
> > Also, I am not using Makefiles, rather compiling each "c unit" using gcc
> using first-principles.
> > Could that be an issue?
>
> Probably.
>
> Only "make" is supported.  You are on your own.
>
> --
> openssl-users mailing list
> To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
>



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Re: [openssl-users] Where to find definitions of certain functions

[Salz, Rich]

> Also, I am not using Makefiles, rather compiling each "c unit" using gcc 
> using first-principles.
> Could that be an issue?

Probably.

Only "make" is supported.  You are on your own.

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Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

I am bringing in the relevant sources from the cloned openssl-repository,
and comping each "c unit" separately.
Also, I am not using Makefiles, rather compiling each "c unit" using gcc
using first-principles.

Could that be an issue?

On Sun, Oct 16, 2016 at 8:10 PM, Salz, Rich  wrote:

> > ex_data.c:(.text+0xaa6): undefined reference to `sk_num'
>
> Something seems wrong in your build environment.  Make sure you are
> starting with a completely empty build tree.
> -rich salz
>
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Re: [openssl-users] Where to find definitions of certain functions

[Salz, Rich]

> ex_data.c:(.text+0xaa6): undefined reference to `sk_num'

Something seems wrong in your build environment.  Make sure you are starting 
with a completely empty build tree.
-rich salz

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Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

Thanks Salz.

I get a lot of linking-errors like ::

ex_data.c:(.text+0xaa6): undefined reference to `sk_num'
ex_data.c:(.text+0xb06): undefined reference to `sk_value'
ex_data.c:(.text+0xc5e): undefined reference to `sk_free'


Doing,



*nm -o /usr/lib/i386-linux-gnu/libssl.a | grep
sk_num*/usr/lib/i386-linux-gnu/libssl.a:s3_srvr.o:
U sk_num
/usr/lib/i386-linux-gnu/libssl.a:s3_clnt.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:s3_lib.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:s23_clnt.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:t1_lib.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:d1_srtp.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:ssl_lib.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:ssl_cert.o: U sk_num
/usr/lib/i386-linux-gnu/libssl.a:ssl_ciph.o: U sk_num


Now, if I see, for example in "openssl/ssl/s3_clnt.c", I do not get any
strings for "sk_num", but I do get the strings of the form
"sk_SSL_COMP_num".


Also, I tried doing the following, but could not see any correlation :



*grep -r "define SSL_COMP"
~/openssl/openssl/*/home/ajay/openssl/openssl/crypto/symhacks.h:#
define SSL_COMP_get_compression_methodsSSL_COMP_get_compress_methods
/home/ajay/openssl/openssl/crypto/symhacks.h:#  define
SSL_COMP_set0_compression_methods   SSL_COMP_set0_compress_methods
/home/ajay/openssl/openssl/crypto/symhacks.h:#  define
SSL_COMP_free_compression_methods   SSL_COMP_free_compress_methods
/home/ajay/openssl/openssl/ssl/ssl_ciph.c:#define SSL_COMP_NULL_IDX   0
/home/ajay/openssl/openssl/ssl/ssl_ciph.c:#define SSL_COMP_ZLIB_IDX   1
/home/ajay/openssl/openssl/ssl/ssl_ciph.c:#define SSL_COMP_NUM_IDX2



What's this mystery?



On Sat, Oct 15, 2016 at 10:55 PM, Salz, Rich  wrote:

> > Hardly helps :(
>
> ➢ /usr/lib/i386-linux-gnu/libcrypto.a:a_time.o:0230 T
> ASN1_TIME_to_generalizedtime
>
> Sure it does.  You know it's in a_time.c, which is crypto/asn1/a_time.c
> And if you look in that file you see "IMPLEMENT_ASN1_FJUNCTIONS" with an
> ASN1_TIME argument.  So, start digging.
>
>
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Re: [openssl-users] Where to find definitions of certain functions

[Salz, Rich]

> Hardly helps :(

➢ /usr/lib/i386-linux-gnu/libcrypto.a:a_time.o:0230 T 
ASN1_TIME_to_generalizedtime

Sure it does.  You know it's in a_time.c, which is crypto/asn1/a_time.c  And if 
you look in that file you see "IMPLEMENT_ASN1_FJUNCTIONS" with an ASN1_TIME 
argument.  So, start digging.


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Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

Hardly helps :(

*nm -o /usr/lib/i386-linux-gnu/libcrypto.a  | grep ASN1_TIME_t*
nm: ebcdic.o: no symbols
/usr/lib/i386-linux-gnu/libcrypto.a:a_time.o:0230 T
ASN1_TIME_to_generalizedtime
/usr/lib/i386-linux-gnu/libcrypto.a:ocsp_srv.o: U
ASN1_TIME_to_generalizedtime

On Sat, Oct 15, 2016 at 9:08 PM, Salz, Rich  wrote:

> > grep -r ASN1_TIME\( ~/openssl/openssl/
> > /home/ajay/openssl/openssl/crypto/asn1/a_time.c:int
> i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp)
>
> > How to search for such symbols in the cloned source-code?
>
> Much of the ASN1 data structures are created by macros and it will not be
> immediately obvious to newcomers how it works.
>
> Your best bet is to use "nm -o" on the library and find the file, and then
> work backward from there.
>
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Re: [openssl-users] Where to find definitions of certain functions

[Salz, Rich]

> grep -r ASN1_TIME\( ~/openssl/openssl/
> /home/ajay/openssl/openssl/crypto/asn1/a_time.c:int i2d_ASN1_TIME(ASN1_TIME 
> *a, unsigned char **pp)

> How to search for such symbols in the cloned source-code?

Much of the ASN1 data structures are created by macros and it will not be 
immediately obvious to newcomers how it works.

Your best bet is to use "nm -o" on the library and find the file, and then work 
backward from there.

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Re: [openssl-users] Where to find definitions of certain functions

[Ajay Garg]

Thanks Matt.


That helped.


However, I am now searching for symbols like ASN_TIME_it, but I get nothing
useful ::

*grep -r ASN1_TIME_it ~/openssl/openssl/*
/home/ajay/openssl/openssl/util/libeay.num:ASN1_TIME_it2715
EXIST:!EXPORT_VAR_AS_FUNCTION:VARIABLE:
/home/ajay/openssl/openssl/util/libeay.num:ASN1_TIME_it2715
EXIST:EXPORT_VAR_AS_FUNCTION:FUNCTION:

*grep -r ASN1_TIME\( ~/openssl/openssl/*
/home/ajay/openssl/openssl/crypto/asn1/a_time.c:int i2d_ASN1_TIME(ASN1_TIME
*a, unsigned char **pp)


How to search for such symbols in the cloned source-code?

On Sat, Oct 15, 2016 at 6:20 PM, Matt Caswell  wrote:

>
>
> On 15/10/16 13:43, Ajay Garg wrote:
> > Hi All.
> >
> > I plan to integrate openssl in our client-side-framework, so that we can
> > remove all the unneeded stuff (as the TLS-versions, and
> > certificate-management is controlled by the server only, which is only a
> > limited subset amongst the vast feature-set of openssl).
> >
> > As part of this, I am first bringing in *all* code into our framework,
> > to the extent that the code compiles as the first stage.
> > My progress is going mostly fine, however I am stuck as I am unable to
> > retrieve the definitions of certain symbols (macros I guess), such as ::
> >
> >   ASN1_OCTET_STRING_free
> >   ASN1_OCTET_STRING_new
> >
> >
> > There are others too, but I guess that if I can be known how to retrieve
> > the above definitions, then others will follow similarly.
> > So, will be grateful to hear from you experts :)
>
> See:
>
> https://github.com/openssl/openssl/blob/master/crypto/asn1/tasn_typ.c
>
> Matt
>
>
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Re: [openssl-users] Where to find definitions of certain functions

[Matt Caswell]

On 15/10/16 13:43, Ajay Garg wrote:
> Hi All.
> 
> I plan to integrate openssl in our client-side-framework, so that we can
> remove all the unneeded stuff (as the TLS-versions, and
> certificate-management is controlled by the server only, which is only a
> limited subset amongst the vast feature-set of openssl).
> 
> As part of this, I am first bringing in *all* code into our framework,
> to the extent that the code compiles as the first stage.
> My progress is going mostly fine, however I am stuck as I am unable to
> retrieve the definitions of certain symbols (macros I guess), such as ::
> 
>   ASN1_OCTET_STRING_free
>   ASN1_OCTET_STRING_new
> 
> 
> There are others too, but I guess that if I can be known how to retrieve
> the above definitions, then others will follow similarly.
> So, will be grateful to hear from you experts :)

See:

https://github.com/openssl/openssl/blob/master/crypto/asn1/tasn_typ.c

Matt


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