Encrypt a big file using openssl smime
I have generated a local certificate in my system and I am trying to encrypt a file through smime. But when I run the command it give me error Unable to load certificate Expecting trusted certificate Error 1024 . This is my script that I am trying to run
openssl smime -encrypt -aes256 -in ABC.xml -binary -outform DEM -out DEF.xml test.pem
Test.pem is my public key. Can anyone tell me that how can I bypass this section and generate a file. Thanks in advance.
You don't indicate how you created your test.pem , but here's the sequence of commands you might be able to use:
Create a new key and a certificate request (you will be prompted for additional information to complete the request):
openssl req -newkey rsa:2048 -keyout privkey.pem -out req.pem
Self-sign the certificate request to create a certificate
openssl x509 -req -in req.pem -signkey privkey.pem -out cert.pem
(You can delete req.pem at this point if you wish)
Encrypt the file using the newly generated certificate:
openssl smime -encrypt -aes256 -in ABC.xml -binary -outform DER -out DEF.xml cert.pem
The file can then be decrypted using:
openssl smime -decrypt -in DEF.xml -inform DER -inkey privkey.pem -out GHI.xml
在openssl中为大文件执行加密，首先使用sha算法对该文件进行散列，然后尝试加密数据，因为smime支持将有限的数据作为输入
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