<div dir="ltr">Please download the source code and refer to apps/x509.c - this handles the conversion command, such as:<div><br></div><div>openssl x509 -in xxx.pem -inform pem -out xxx.cer -outform DER<br></div><div><br></div><div>the function you will look for is i2d_X509_bio</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 12 December 2016 at 09:37, Sairam Rangaswamy -X (sairanga - ARICENT TECHNOLOGIES MAURIITIUS  LIMITED at Cisco) <span dir="ltr"><<a href="mailto:sairanga@cisco.com" target="_blank">sairanga@cisco.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">




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<p class="MsoNormal">As I understand, the X509 certificates from CA or self-signed can be created in either<u></u><u></u></p>
<p class="MsoNormal">PEM or DER format.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Is there a way to programmatically convert the PEM format file to DER or DER to PEM?<u></u><u></u></p>
<p class="MsoNormal">Is there a single API or set of APIs available from openssl libraries?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards,<u></u><u></u></p>
<p class="MsoNormal">R. Sairam<u></u><u></u></p>
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<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif"">Sairam Rangaswamy</span></b><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal" style="line-height:115%"><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif"">Architect</span><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal" style="line-height:115%"><span style="font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif""><a href="mailto:sairanga@cisco.com" target="_blank"><span style="color:blue">sairanga@cisco.com</span></a> | Mobile <a href="tel:+91%2098803%2002240" value="+919880302240" target="_blank">+919880302240</a> | Office <a href="tel:+91%2080%204106%208409" value="+918041068409" target="_blank">+918041068409</a></span><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal" style="line-height:115%"><a href="https://www.aricent.com/" target="_blank"><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif";color:windowtext;text-decoration:none"><img border="0" width="246" height="62" id="m_8808679826262006273Picture_x0020_4" src="cid:image002.jpg@01D25489.7A99ACB0"></span></a><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif"">  
<u></u><u></u></span></p>
<p class="MsoNormal" style="line-height:115%"><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal" style="line-height:115%"><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal" style="line-height:115%"><u></u><span style="margin-top:7px;width:644px;height:1px"><img width="644" height="1" src="cid:image003.png@01D25489.7A99ACB0"></span><u></u><span style="font-size:9.0pt;line-height:115%;font-family:"Helvetica","sans-serif""><u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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