Extract cert from PKCS#12 openssl
Split .p12 into separate cert and key PEM files
openssl pkcs12 -in bundle.p12 -nokeys -out cert.pem && openssl pkcs12 -in bundle.p12 -nocerts -nodes -out key.pem
more openssl
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Check live TLS cert
echo | openssl s_client -connect example.com:443 -servername example.com 2>/dev/null | openssl x509 -noout -dates -subject -issuer
Check full cert chain
openssl s_client -connect example.com:443 -showcerts 2>/dev/null | openssl crl2pkcs7 -nocrl | openssl pkcs7 -print_certs -noout -text | grep -E 'Subject:|Issuer:'
Encrypt file with AES-256
openssl enc -aes-256-cbc -pbkdf2 -in secret.txt -out secret.enc
Decrypt AES-256 file
openssl enc -d -aes-256-cbc -pbkdf2 -in secret.enc -out secret.txt
Generate random hex token
openssl rand -hex 32