OpenSSL

X509

• openssl x509 -inform der -in xxx.der -text
• openssl x509 -in xxx.pem -text

RSA

• openssl rsa -in xxx.pem -text

CSR

• openssl req -inform der -in xxx.der -text
• openssl req -in xxx.pem -text

CRL

• openssl crl -inform der -in xxx.der -text
• openssl crl -in xxx.pem -text

P12

次の 2つのコマンドを順に実行(いったんファイルに保存する)

• openssl pkcs12 -in xxx.p12 -out xxx.pem
• openssl x509 -in xxx.pem -text

• 暗号化
  

openssl smime -encrypt -aes256 -in original.txt -out encrypted.txt smime.cer

• 復号化
  

openssl smime -decrypt -aes256 -in encrypted.txt -out original.txt -inkey smime.key -recip smime.cer

• 暗号化
  

openssl aes-256-cbc -e -in original.txt -out encrypted.txt

• 復号化
  

openssl aes-256-cbc -d -in encrypted.txt -out original.txt