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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
- ssl - How to convert a DER file to a PEM file? - Stack Overflow
Unfortunately there are various kinds how keys can be stored - DER vs PEM is not the only variation but there are also different ways to have a key in DER etc
- 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
- Identifying whether a certificate is der encoded or base 64 encoded
Identifying whether a certificate is der encoded or base 64 encoded Asked 16 years, 8 months ago Modified 4 years, 1 month ago Viewed 27k times
- 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
- 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
- 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
- mbedtls DER formatted certificate chain verification
The certificate chain in DER format as individual files The PKI is simple as three levels (1) Root_CA (2) Intermediate_CA (3) Device_CERT I could able to verify the certificates using openssl verify --- command ; but with below program, the certificate verification fails with Error: -0x2700; flag: 8
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