<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:NSimSun;
panose-1:2 1 6 9 3 1 1 1 1 1;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:NSimSun;
panose-1:2 1 6 9 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>Dear Salz,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>I don’t know how </span><span lang=EN-US style='color:#1F497D'>to use accessors/settor functions. </span><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>And I still don’t know how to correct the compiling error in Visual Studio 2010. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>Specifically, for this line of code: EVP_ENCODE_CTX base64, I got the following error:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>error C2079: </span><span style='font-size:10.5pt;font-family:SimSun;color:#1F497D'>“</span><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>base64</span><span style='font-size:10.5pt;font-family:SimSun;color:#1F497D'>”</span><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>use undefined struct</span><span style='font-size:10.5pt;font-family:SimSun;color:#1F497D'>“</span><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>evp_Encode_Ctx_st</span><span style='font-size:10.5pt;font-family:SimSun;color:#1F497D'>”</span><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>.<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span lang=EN-US style='font-size:10.5pt;color:#1F497D'><o:p> </o:p></span></a></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>My code is as follows:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun;color:green'>//base64 encoding</span><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun;color:blue'>void</span><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> encode(<span style='color:blue'>unsigned</span> <span style='color:blue'>char</span>* outData,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> <span style='color:blue'>int</span> * outlen,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> <span style='color:blue'>const</span> <span style='color:blue'>unsigned</span> <span style='color:blue'>char</span>* data,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> <span style='color:blue'>int</span> datalen)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'>{<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> <span style='color:blue'>int</span> tmp=0;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> EVP_ENCODE_CTX base64;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> base64 = EVP_ENCODE_CTX_new();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> EVP_EncodeInit(&base64); <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> EVP_EncodeUpdate(&base64,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> outData,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> outlen,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> data,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> datalen<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> tmp=*outlen;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> EVP_EncodeFinal(&base64,outData+*outlen,outlen);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> EVP_ENCODE_CTX_free(&base64);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> *outlen+=tmp;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> outData[*outlen]=0;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'> print(<span style='color:#A31515'>"base64 encoded:"</span>,outData,*outlen);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:NSimSun'>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'>Jing<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;color:#1F497D'><o:p> </o:p></span></p><div><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> openssl-dev [mailto:openssl-dev-bounces@openssl.org] <b>On Behalf Of </b>Salz, Rich<br><b>Sent:</b> Friday, September 23, 2016 9:55 PM<br><b>To:</b> openssl-dev@openssl.org<br><b>Subject:</b> Re: [openssl-dev] Definitions for some structures are strangely missing from 'evp.h' or other header files in OpenSSL 1.1.0a<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Yes, in 1.1.0 we =ade many structures opaque. You will have to use accessors/settor =unctions.</span><span lang=EN-US><o:p></o:p></span></p></div></body></html>