Convert From P7B To PEM Via OpenSSL


Answer :

Solution 1:


Try this:



$ openssl pkcs7 -inform der -in a.p7b -out a.cer


If it doesn't work, brings to a Windows machine and export follow this guide.



Solution 2:


So to combine the above answers, the command is:

openssl pkcs7 -in cert.p7b -inform DER -print_certs -out cert.pem



Verified to be working on Windows, using OpenSSL-Win64



/Thanks Bogdan for spotting the error




Solution 3:


I followed this guide that instructs you to change the header/footer lines from



-----BEGIN PKCS #7 SIGNED DATA-----
[data]
-----END PKCS #7 SIGNED DATA-----


to



-----BEGIN CERTIFICATE-----
[data]
-----END CERTIFICATE-----


Then run the command openssl pkcs7 -in foo.modified.crt -print_certs -out foo.certs (where foo.modified.crt is the file that you saved the modified version into). This gave me the same results as running through a Windows certificate export as suggested in other answers.




Solution 4:


As far as I know, the following should convert a pkcs7 cert to a pem



openssl pkcs7 -in certificate_file.p7b -print_certs -out cert.pem



Solution 5:


quick solution in my case (a lot of files with missing header/footer) :



base64 -d $FILE | openssl pkcs7 -inform DER -print_certs



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