stackoverflow com questions what-are-the-differences-between-pem-cer-and-derYou need to rename pem to cer first in order for Windows to recognize the file as a certificate private key file Both file extensions may contain cert(s) and or key(s) in either ASCII-armored plaintext or Base64 DER encoded binary format, but you can use cer files with Windows built-in utilities – It turns out there is more complexity here: I needed to provide many more details to get this rolling I think its something to do with the fact that its a connection that needs client authentication, and the hankshake needed more info to continue to the stage where the certificates were dumped I have a cer certificate file, and need to extract the Public Key I can only extract to PEM format The "outform" parameter does nothing openssl x509 -inform PEM -in certificate cer -outform DER - I cannot use functions attached to the object I want to use I added a comment to the line that is not working As an error, I get: Error; pointer to incomplete class type is not allowed dokter c stackoverflow com ----error-403-14-forbidden-the-web-server-is-configure -inform DER|NET|PEM This specifies the input format The DER option uses an ASN1 DER encoded form compatible with the PKCS#1 RSAPrivateKey or SubjectPublicKeyInfo format The PEM form is the default format: it consists of the DER format base64 encoded with additional header and footer lines On input PKCS#8 format private keys are also accepted This was most of the answer I needed The controller name however has to match what was created for an MVC application Controller name (If you call your controller IndexController then it would work) - so the action name default on a controller should be Index and then it all gets tied together - the suggestions to use directory browsing is NOT a good idea in my opinion as it allows anyone to Importing cer certificate file downloaded from browser (open the url and dig for details) into cacerts keystore in java_home\jre\lib\security worked for me, as opposed to attemps to generate and use my own keystore stackoverflow com questions pointer-to-incomplete-class-type-is-not-allowedstackoverflow com convert-a-cert-pem-certificate-to-a-pfx-certificateI cannot use functions attached to the object I want to use I added a comment to the line that is not working As an error, I get: Error; pointer to incomplete class type is not allowed dokter c Apr 12, 2016 · The problem is not PEM vs DER but that you are using a certificate request in a place where a certificate is expected This is clearly shown by the PEM header
BEGIN CERTIFICATE REQUEST
To show the content of a certificate request use openssl req -in CSR csr -text To show the content of a certificate use openssl x509 -in CERT crt stackoverflow com using-openssl-to-get-the-certificate-from-a-serverstackoverflow com how-to-determine-ssl-cert-expiration-date-from-a-pem-en stackoverflow com error-importing-ssl-certificate-not-an-x-509-certificateJun 20, 2020 · You need to rename pem to cer first in order for Windows to recognize the file as a certificate private key file Both file extensions may contain cert(s) and or key(s) in either ASCII-armored plaintext or Base64 DER encoded binary format, but you can use cer files with Windows built-in utilities – stackoverflow com questions 13732826 convert-pem-to-crt-and-keystackoverflow com extract-public-key-from-certificate-in-der-formatThe OpenSSL command line contains lots of options to convert between PEM and DER, print out high level certificate information or parse the ASN 1 to get a low level view of what is in there Details Like most ASN 1 structures, DER encoded certificate always starts off with a byte 30 which is the tag encoding of an ASN 1 SEQUENCE Importing cer certificate file downloaded from browser (open the url and dig for details) into cacerts keystore in java_home\jre\lib\security worked for me, as opposed to attemps to generate and use my own keystore Oct 11, 2017 · openssl x509 -inform DER -outform PEM -in server crt -out server crt pem For server key, use openssl rsa in place of openssl x509 The server key is likely your private key, and the crt file is the returned, signed, x509 certificate If this is for a Web server and you cannot specify loading a separate private and public key: Mar 27, 2012 · The lines should already be there If they are not, your certificate is likely DER encoded (or invalid) To convert it do openssl x509 -in mycert der -inform DER -out myCert pem -outform PEM To view and verify it openssl -in myCert pem -text The file must contain a single certificate – Mar 30, 2014 · The OpenSSL command line contains lots of options to convert between PEM and DER , print out high level certificate information or parse the ASN 1 to get a low level view of what is in there Details Like most ASN 1 structures, DER encoded certificate always starts off with a byte 30 which is the tag encoding of an ASN 1 SEQUENCE Jul 31, 2020 · Those file names represent different parts of the key generation and verification process Please note that the names are just convention, you could just as easily call the files pepperoni pizza and the content will be the same, so do be conscious of how you use the filenames It turns out there is more complexity here: I needed to provide many more details to get this rolling I think its something to do with the fact that its a connection that needs client authentication, and the hankshake needed more info to continue to the stage where the certificates were dumped stackoverflow com how-to-import-a-cer-certificate-into-a-java-keystoreMar 9, 2010 · I'm trying to read a custom extension from a digital certificate I know the value is a GeneralString encoded in DER Is there an easy way to correctly decode it and get a Java String? I tried the following, but 's' includes some of the encoding metadata as junk characters at the start of the string Here's a bash function which checks all your servers, assuming you're using DNS round-robin Note that this requires GNU date and won't work on Mac OSThe lines should already be there If they are not, your certificate is likely DER encoded (or invalid) To convert it do openssl x509 -in mycert der -inform DER -out myCert pem -outform PEM To view and verify it openssl -in myCert pem -text The file must contain a single certificate –