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What are the differences between . pem, . cer, and . der? 233 pem, cer and der are all file extensions for files that may contain a X 509 v3 certificate The der extension DER is the method of encoding the data that makes up the certificate DER itself could represent any kind of data, but usually it describes an encoded certificate or a CMS container
openssl der files importing into java keystore - Stack Overflow I created a keypair with openssl and want them to import into the java-keystore: 1) openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out my_privatekey pem 2) openssl rsa -pubout -outf
Encoding of implicit and explicit tags in ASN. 1 - Stack Overflow This is also not specific to BER DER, it's a feature of ASN 1 Some encoding rules (BER, DER, and OER to a limited extent) use the tags in the encodings, while other encoding rules (PER, JER) don't include the tags in the encodings Still, the tags exist independently of the encoding rules being used
OpenSsl cannot read DER formatted certificate - Stack Overflow Update I have based my solution on this and this answers Background I am trying to read a DER formatted certificate file and attempt to verify it My cert is in DER format I have confirmed t
How do I decode a DER encoded string in Java? - Stack Overflow 19 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
Identifying whether a certificate is der encoded or base 64 encoded 2 Informational since this got a search hit - All X 509 certs pretty much use Distinguished Encoding Rules (DER) as the defacto encoding standard to store certificate data in Abstract Syntax Notation One (ASN 1) Base64 is a form of binary-to-text encoding (usually in ASCII text) This makes it "transmission" friendly
x509 - Can I view a raw DER binary file? - Stack Overflow But when I convert it into a DER format with this openssl x509 -in cert pem -out cert der -outform DER I get a DER file and when I view it in a text editor I don't get the binary view Is there a way to see the binary view of DER? Thank you in advance, Dubbed_Kiwi
How to verify DER certificate with openssl? - Stack Overflow openssl x509 -inform der -in \leaf cert cer -outform pem Converts the DER certificate to PEM format with the output to the stdout openssl verify -CAfile CA ca crt Verifies the PEM certificate from stdin And you combine the two with the pipe '|' command which pipes the stdout from the first command to the stdin for the second command
Do I need to convert . CER to . CRT for Apache SSL certificates? If so . . . CER and CRT extensions mean nothing Different PKI vendors use different extensions for the same thing If the file is binary, then its probably ASN 1 DER encoded If the file is human readable with -----BEGIN CERTIFICATE-----, then its PEM encoded What do you have (DER or PEM), and what do you need (DER or PEM)?