Dear Expert, I am unable to sign using the following command openssl smime -sign -in <input filename> -out <signature filename> -outform pem -inkey <private key> -signer <certificate> Where input filename = 1.txt output filename = 2.txt certificate = abc.p7b Content of 1.txt is as follow This is testing file for attachement. I am getting following error. Loading 'screen' into random state - done unable to load certificate 2140:error:0906D06C:PEM routines:PEM_read_bio:no start line:.\crypto\pem\pem_lib.c:663:Expecting: TRUSTED CERTIFICATE Can't read signer certificate file abc.p7b Can you please help me out for the same?
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