154 lines
4.3 KiB
Bash
154 lines
4.3 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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# === Config (you can override via env or first arg) ===
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DOMAIN="${1:-${DOMAIN:-192.168.205.130.nip.io}}"
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BITS="${BITS:-4096}"
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DAYS_CA="${DAYS_CA:-3650}" # ~10 years for the CA
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DAYS_CERT="${DAYS_CERT:-397}" # keep server cert within common client limits
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WORKDIR="${WORKDIR:-ssl-${DOMAIN}}"
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echo ">> Generating Root CA and wildcard cert for domain: ${DOMAIN}"
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echo ">> Work directory: ${WORKDIR}"
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mkdir -p "${WORKDIR}"
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cd "${WORKDIR}"
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# Tighten key perms by default
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umask 077
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# --- CA OpenSSL config ---
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cat > ca.cnf <<'EOF'
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[ ca ]
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default_ca = CA_default
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[ CA_default ]
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dir = .
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new_certs_dir = $dir/newcerts
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database = $dir/index.txt
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serial = $dir/serial
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private_key = $dir/ca.key.pem
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certificate = $dir/ca.cert.pem
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default_md = sha256
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policy = policy_any
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copy_extensions = copy
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[ policy_any ]
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commonName = supplied
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countryName = optional
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stateOrProvinceName = optional
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localityName = optional
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organizationName = optional
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organizationalUnitName = optional
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emailAddress = optional
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[ req ]
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default_bits = 4096
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prompt = no
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default_md = sha256
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x509_extensions = v3_ca
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distinguished_name = req_dn
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string_mask = utf8only
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[ req_dn ]
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CN = Example Local Root CA
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[ v3_ca ]
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basicConstraints = critical, CA:true, pathlen:0
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keyUsage = critical, keyCertSign, cRLSign
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subjectKeyIdentifier = hash
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authorityKeyIdentifier = keyid:always,issuer
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EOF
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mkdir -p newcerts
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: > index.txt
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echo 1000 > serial
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# --- Generate CA key & self-signed cert (RSA-4096) ---
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echo ">> Creating CA key..."
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openssl genrsa -out ca.key.pem "${BITS}" >/dev/null 2>&1
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chmod 600 ca.key.pem
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echo ">> Creating CA certificate..."
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openssl req -config ca.cnf -key ca.key.pem -new -x509 -days "${DAYS_CA}" -sha256 -out ca.cert.pem
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# --- Server/OpenSSL config with SAN ---
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cat > server.cnf <<EOF
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[ req ]
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default_bits = ${BITS}
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prompt = no
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default_md = sha256
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distinguished_name = dn
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req_extensions = v3_req
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[ dn ]
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CN = ${DOMAIN}
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[ v3_req ]
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basicConstraints = CA:FALSE
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keyUsage = critical, digitalSignature, keyEncipherment
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extendedKeyUsage = serverAuth
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subjectAltName = @alt_names
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[ alt_names ]
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DNS.1 = *.${DOMAIN}
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DNS.2 = ${DOMAIN}
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EOF
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# --- Generate server key & CSR ---
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echo ">> Creating server key..."
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openssl genrsa -out "${DOMAIN}.key" "${BITS}" >/dev/null 2>&1
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chmod 600 "${DOMAIN}.key"
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echo ">> Creating CSR..."
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openssl req -new -key "${DOMAIN}.key" -out "${DOMAIN}.csr.pem" -config server.cnf
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# --- Extensions for final certificate (keep SAN/EKU consistent) ---
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cat > cert_ext.cnf <<EOF
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[ v3_server ]
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basicConstraints = CA:FALSE
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keyUsage = critical, digitalSignature, keyEncipherment
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extendedKeyUsage = serverAuth
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subjectAltName = @alt_names
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[ alt_names ]
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DNS.1 = *.${DOMAIN}
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DNS.2 = ${DOMAIN}
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EOF
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# --- Sign CSR with our CA ---
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echo ">> Signing server certificate with CA..."
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openssl x509 -req \
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-in "${DOMAIN}.csr.pem" \
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-CA ca.cert.pem -CAkey ca.key.pem -CAcreateserial \
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-out "${DOMAIN}.crt" \
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-days "${DAYS_CERT}" -sha256 \
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-extfile cert_ext.cnf -extensions v3_server
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# --- Produce handy bundles ---
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# Leaf only (typical when client already trusts the CA)
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cp "${DOMAIN}.crt" "${DOMAIN}.leaf.pem"
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# Leaf + CA (some servers/clients expect to see the issuing cert)
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cat "${DOMAIN}.crt" ca.cert.pem > "${DOMAIN}.chain.pem"
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# Optional PFX for systems that prefer it (no password)
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openssl pkcs12 -export -out "${DOMAIN}.pfx" -inkey "${DOMAIN}.key" -in "${DOMAIN}.crt" -certfile ca.cert.pem -passout pass:
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# --- Verify ---
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echo ">> Verifying certificate chain..."
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openssl verify -CAfile ca.cert.pem "${DOMAIN}.crt"
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echo
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echo "=== Done ==="
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echo "Files created in ${WORKDIR}:"
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printf " - Root CA: ca.key.pem (KEEP SECRET), ca.cert.pem (import into trust store)\n"
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printf " - Server key: %s.key (KEEP SECRET)\n" "${DOMAIN}"
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printf " - Server cert: %s.crt\n" "${DOMAIN}"
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printf " - Chain: %s.chain.pem (leaf + CA)\n" "${DOMAIN}"
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printf " - CSR: %s.csr.pem\n" "${DOMAIN}"
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printf " - PFX: %s.pfx (no password)\n" "${DOMAIN}"
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echo
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echo "Tip: import ca.cert.pem into your OS/browser trust store; point your server at:"
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echo " key=${DOMAIN}.key"
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echo " cert=${DOMAIN}.crt (or ${DOMAIN}.chain.pem if it wants a chain)"
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