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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Matt,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Thanks for the reply.. we would implement as you suggested.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Matt Caswell <matt@openssl.org>
<br>
<b>Sent:</b> 23 November 2020 17:12<br>
<b>To:</b> Narayana, Sunil Kumar <sanarayana@rbbn.com>; openssl-users@openssl.org<br>
<b>Subject:</b> Re: set/get utilities are not available to access variable 'num' of structure bio_st (Matt Caswell)<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">NOTICE: This email was received from an EXTERNAL sender<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<br>
On 23/11/2020 11:28, Narayana, Sunil Kumar wrote:<br>
> Hi Matt,<br>
> We are using MEM type BIO. similar to the openssl<br>
> library ‘BIO_TYPE_MEM ‘ we have an internal type defined like ex:-<br>
> ‘BIO_TYPE_XYZ_MEM’ and all other mem utilities are internally defined.<br>
> <br>
> Like XYZ_mem_new/XYZ_mem_read … etc these utilities are accessing the<br>
> bio_st variable ‘*num’*.<br>
> <br>
> please suggest set/get utilities to handle this scenario.<br>
<br>
If I understand correctly you want to store an "int" value internally to<br>
a custom BIO.<br>
<br>
Custom BIOs can associate an arbitrary data structure with the BIO<br>
object and store whatever they like in it using the BIO_get_data() and<br>
BIO_set_data() functions.<br>
<br>
For example:<br>
<br>
typedef struct {<br>
int num;<br>
} XYZ_PRIVATE_DATA;<br>
<br>
static int XYZ_mem_new(BIO *bio)<br>
{<br>
XYZ_PRIVATE_DATA *data = OPENSSL_zalloc(sizeof(*data));<br>
<br>
if (data == NULL)<br>
return 0;<br>
<br>
/* Store whatever you like in num */<br>
data->num = 5;<br>
BIO_set_data(bio, data);<br>
}<br>
<br>
static int XYZ_mem_free(BIO *bio)<br>
{<br>
XYZ_PRIVATE_DATA *data = BIO_get_data(bio);<br>
<br>
OPENSSL_free(data);<br>
BIO_set_data(bio, NULL);<br>
}<br>
<br>
static int XYZ_mem_read(BIO *bio, char *out, int outl)<br>
{<br>
XYZ_PRIVATE_DATA *data = BIO_get_data(bio);<br>
<br>
/* Do the read operation and use data->num as required */<br>
}<br>
<br>
<br>
Matt<br>
<br>
> <br>
> <br>
> Regards,<br>
> <br>
> Sunil<br>
> <br>
> *From:*openssl-users <<a href="mailto:openssl-users-bounces@openssl.org">openssl-users-bounces@openssl.org</a>> *On Behalf Of<br>
> <a href="mailto:*openssl-users-request@openssl.org">*openssl-users-request@openssl.org</a><br>
> *Sent:* 20 November 2020 23:34<br>
> *To:* <a href="mailto:openssl-users@openssl.org">openssl-users@openssl.org</a><br>
> *Subject:* openssl-users Digest, Vol 72, Issue 19<br>
> <br>
> <br>
> <br>
> ------------------------------------------------------------------------<br>
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> Today's Topics:<br>
> <br>
> 1. set/get utilities are not available to access variable<br>
> 'num' of structure bio_st (Narayana, Sunil Kumar)<br>
> 2. Re: set/get utilities are not available to access variable<br>
> 'num' of structure bio_st (Matt Caswell)<br>
> 3. EC curve preferences (Skip Carter)<br>
> 4. RE: EC curve preferences (Michael Wojcik)<br>
> <br>
> <br>
> ----------------------------------------------------------------------<br>
> <br>
> Message: 1<br>
> Date: Fri, 20 Nov 2020 13:46:00 +0000<br>
> From: "Narayana, Sunil Kumar" <<a href="mailto:sanarayana@rbbn.com%0b">sanarayana@rbbn.com<br>
</a>> <<a href="mailto:sanarayana@rbbn.com">mailto:sanarayana@rbbn.com</a>>><br>
> To: "<a href="mailto:openssl-users@openssl.org%20%3cmailto:openssl-users@openssl.org%3e">openssl-users@openssl.org <mailto:openssl-users@openssl.org></a>"<br>
> <<a href="mailto:openssl-users@openssl.org%20%3cmailto:openssl-users@openssl.org">openssl-users@openssl.org <mailto:openssl-users@openssl.org</a>>><br>
> Subject: set/get utilities are not available to access variable<br>
> 'num' of structure bio_st<br>
> Message-ID:<br>
> <<a href="mailto:SN6PR03MB4061A9FF473DE74B064A1D8DB0FF0@SN6PR03MB4061.namprd03.prod.outlook.com%0b">SN6PR03MB4061A9FF473DE74B064A1D8DB0FF0@SN6PR03MB4061.namprd03.prod.outlook.com<br>
</a>> <<a href="mailto:SN6PR03MB4061A9FF473DE74B064A1D8DB0FF0@SN6PR03MB4061.namprd03.prod.outlook.com">mailto:SN6PR03MB4061A9FF473DE74B064A1D8DB0FF0@SN6PR03MB4061.namprd03.prod.outlook.com</a>>><br>
> <br>
> Content-Type: text/plain; charset="utf-8"<br>
> <br>
> Hi ,<br>
> We are porting our Application from openssl 1.0.1 to openssl 3.0. In<br>
> related to this activity we require to access the variable 'num' of<br>
> structure bio_st.<br>
> In older versions the variable was accessed to set and get value using<br>
> pointer operator (bi->num ).<br>
> Since this is not allowed in 3.0 we are looking for the Get/Set<br>
> utilities similar to other member (BIO_set_flags/ BIO_get_flags)<br>
> <br>
> Is this not supported in 3.0 ? If yes, Please guide the proper alternatives.<br>
> <br>
> Regards,<br>
> Sunil<br>
> <br>
> <br>
> -----------------------------------------------------------------------------------------------------------------------<br>
> Notice: This e-mail together with any attachments may contain<br>
> information of Ribbon Communications Inc. that<br>
> is confidential and/or proprietary for the sole use of the intended<br>
> recipient. Any review, disclosure, reliance or<br>
> distribution by others or forwarding without express permission is<br>
> strictly prohibited. If you are not the intended<br>
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> <br>
> ------------------------------<br>
> <br>
> Message: 2<br>
> Date: Fri, 20 Nov 2020 13:55:34 +0000<br>
> From: Matt Caswell <<a href="mailto:matt@openssl.org%20%3cmailto:matt@openssl.org">matt@openssl.org <mailto:matt@openssl.org</a>>><br>
> To: <a href="mailto:openssl-users@openssl.org">openssl-users@openssl.org</a> <<a href="mailto:openssl-users@openssl.org">mailto:openssl-users@openssl.org</a>><br>
> Subject: Re: set/get utilities are not available to access variable<br>
> 'num' of structure bio_st<br>
> Message-ID: <<a href="mailto:53108b39-21f8-dea0-c3c3-fe5517a5613f@openssl.org%0b">53108b39-21f8-dea0-c3c3-fe5517a5613f@openssl.org<br>
</a>> <<a href="mailto:53108b39-21f8-dea0-c3c3-fe5517a5613f@openssl.org">mailto:53108b39-21f8-dea0-c3c3-fe5517a5613f@openssl.org</a>>><br>
> Content-Type: text/plain; charset=utf-8<br>
> <br>
> <br>
> <br>
> On 20/11/2020 13:46, Narayana, Sunil Kumar wrote:<br>
>> Hi ,<br>
>><br>
>> ??????????????? We are porting our Application from ?openssl 1.0.1 to<br>
>> openssl 3.0. In related to this activity we require to access the<br>
>> variable ?*num*? of structure *bio_st. *<br>
>><br>
>> In older versions the variable was accessed to set and get value using<br>
>> pointer operator (bi->num ).<br>
>><br>
>> Since this is not allowed in 3.0 we are looking for the Get/Set<br>
>> utilities similar to other member*(BIO_set_flags/ BIO_get_flags) *<br>
>><br>
>> ?<br>
>><br>
>> Is this not supported in 3.0 ? If yes, Please guide the proper<br>
> alternatives.<br>
> <br>
> What kind of BIO are you using? Different BIOs may provide different<br>
> mechanisms to get hold of this value. For example a number of file<br>
> descriptor based BIOs provide BIO_get_fd().<br>
> <br>
> Matt<br>
> <br>
> <br>
> <br>
> ------------------------------<br>
> <br>
> Message: 3<br>
> Date: Fri, 20 Nov 2020 08:43:59 -0800<br>
> From: Skip Carter <<a href="mailto:skip@taygeta.com%20%3cmailto:skip@taygeta.com">skip@taygeta.com <mailto:skip@taygeta.com</a>>><br>
> To: OpenSSL Users <<a href="mailto:openssl-users@openssl.org%0b">openssl-users@openssl.org<br>
</a>> <<a href="mailto:openssl-users@openssl.org">mailto:openssl-users@openssl.org</a>>><br>
> Subject: EC curve preferences<br>
> Message-ID: <<a href="mailto:1605890639.1675.24.camel@taygeta.com%0b">1605890639.1675.24.camel@taygeta.com<br>
</a>> <<a href="mailto:1605890639.1675.24.camel@taygeta.com">mailto:1605890639.1675.24.camel@taygeta.com</a>>><br>
> Content-Type: text/plain; charset="utf-8"<br>
> <br>
> <br>
> I am sure this in the documentation somewhere; but where ?<br>
> <br>
> What are the preferred ECDH curves for a given keysize ? Which curves<br>
> are considered obsolete/deprecated/untrustworthy ?<br>
> <br>
> <br>
> -- <br>
> Dr Everett (Skip) Carter??0xF29BF36844FB7922<br>
> <a href="mailto:skip@taygeta.com">skip@taygeta.com</a> <<a href="mailto:skip@taygeta.com">mailto:skip@taygeta.com</a>><br>
> <br>
> Taygeta Scientific Inc<br>
> 607 Charles Ave<br>
> Seaside CA 93955<br>
> 831-641-0645 x103<br>
> <br>
> <br>
> -------------- next part --------------<br>
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> <br>
> ------------------------------<br>
> <br>
> Message: 4<br>
> Date: Fri, 20 Nov 2020 18:03:22 +0000<br>
> From: Michael Wojcik <<a href="mailto:Michael.Wojcik@microfocus.com%0b">Michael.Wojcik@microfocus.com<br>
</a>> <<a href="mailto:Michael.Wojcik@microfocus.com">mailto:Michael.Wojcik@microfocus.com</a>>><br>
> To: Skip Carter <<a href="mailto:skip@taygeta.com%20%3cmailto:skip@taygeta.com">skip@taygeta.com <mailto:skip@taygeta.com</a>>>, OpenSSL Users<br>
> <<a href="mailto:openssl-users@openssl.org%20%3cmailto:openssl-users@openssl.org">openssl-users@openssl.org <mailto:openssl-users@openssl.org</a>>><br>
> Subject: RE: EC curve preferences<br>
> Message-ID:<br>
> <<a href="mailto:DM6PR18MB2700D392831EA5CD3EF318D5F9FF0@DM6PR18MB2700.namprd18.prod.outlook.com%0b">DM6PR18MB2700D392831EA5CD3EF318D5F9FF0@DM6PR18MB2700.namprd18.prod.outlook.com<br>
</a>> <<a href="mailto:DM6PR18MB2700D392831EA5CD3EF318D5F9FF0@DM6PR18MB2700.namprd18.prod.outlook.com">mailto:DM6PR18MB2700D392831EA5CD3EF318D5F9FF0@DM6PR18MB2700.namprd18.prod.outlook.com</a>>><br>
> <br>
> Content-Type: text/plain; charset="utf-8"<br>
> <br>
>> From: openssl-users <<a href="mailto:openssl-users-bounces@openssl.org%0b">openssl-users-bounces@openssl.org<br>
</a>> <<a href="mailto:openssl-users-bounces@openssl.org">mailto:openssl-users-bounces@openssl.org</a>>> On Behalf Of Skip<br>
>> Carter<br>
>> Sent: Friday, 20 November, 2020 09:44<br>
>><br>
>> What are the preferred ECDH curves for a given keysize ? Which curves<br>
>> are considered obsolete/deprecated/untrustworthy ?<br>
> <br>
> For TLSv1.3, this is easy. RFC 8446 B.3.1.4 only allows the following:<br>
> secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019), x25519(0x001D),<br>
> x448(0x001E). Those are your choices. If you want interoperability,<br>
> enable them all; if you want maximum security, only use X25519 and X448.<br>
> See safecurves.cr.yp.to for the arguments in favor of the latter position.<br>
> <br>
> Frankly, unless you're dealing with something of very high value or that<br>
> needs to resist breaking for a long time, I don't see any real-world<br>
> risk in using the SEC 2 curves. You might want to disallow just<br>
> secp256r1 if you're concerned about that key size becoming tractable<br>
> under new attacks or quantum computing within your threat timeframe.<br>
> Ultimately, this is a question for your threat model.<br>
> <br>
> <br>
> For TLSv1.2, well...<br>
> <br>
> - Some people recommend avoiding non-prime curves (i.e. over binary<br>
> fields, such as the sect* ones) for intellectual-property reasons. I'm<br>
> not going to try to get into that, because IANAL and even if I were, I<br>
> wouldn't touch that without a hefty retainer.<br>
> <br>
> - Current consensus, more or less, seems to be to use named curves and<br>
> not custom ones. The arguments for that seem pretty persuasive to me. So<br>
> don't use custom curves.<br>
> <br>
> - Beyond that? Well, here's one Stack Exchange response from Thomas<br>
> Pornin (who knows a hell of a lot more about this stuff than I do) where<br>
> he suggests using just prime256v1 (which is the same as secp256r1 I<br>
> believe?) and secp384r1:<br>
> <br>
> <a href="https://security.stackexchange.com/questions/78621/which-elliptic-curve-should-i-use">
https://security.stackexchange.com/questions/78621/which-elliptic-curve-should-i-use</a><br>
> <br>
> Those are the curves in Suite B, before the NSA decided to emit vague<br>
> warnings about ECC. They subsequently decided P384 aka secp384r1 is OK<br>
> until post-quantum primitives are standardized. So if your application<br>
> prefers secp384r1 for TLSv1.2, then you can decide whether to also allow<br>
> prime256v1 for interoperability. Again, that's a question for your<br>
> threat model.<br>
> <br>
> All that said, some people will have different, and quite possibly<br>
> better-informed, opinions on this.<br>
> <br>
> --<br>
> Michael Wojcik<br>
> <br>
> ------------------------------<br>
> <br>
> Subject: Digest Footer<br>
> <br>
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> <br>
> End of openssl-users Digest, Vol 72, Issue 19<br>
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> <o:p></o:p></p>
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