115 lines
3.4 KiB
Bash
115 lines
3.4 KiB
Bash
#! /bin/bash
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# Usage:
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# ./gen_certs.sh [cert-kind]
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#
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# [cert-kind]:
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# ed25519
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# rsa_sha256
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# ecdsa_nistp256_sha256
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# ecdsa_nistp384_sha384
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#
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# Generate a certificate of the [cert-kind] key type, or if no cert-kind is
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# specified, all of the certificates.
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#
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# Examples:
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# ./gen_certs.sh ed25519
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# ./gen_certs.sh rsa_sha256
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# TODO: `rustls` (really, `webpki`) doesn't currently use the CN in the subject
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# to check if a certificate is valid for a server name sent via SNI. It's not
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# clear if this is intended, since certificates _should_ have a `subjectAltName`
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# with a DNS name, or if it simply hasn't been implemented yet. See
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# https://bugzilla.mozilla.org/show_bug.cgi?id=552346 for a bit more info.
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CA_SUBJECT="/C=US/ST=CA/O=Rocket CA/CN=Rocket Root CA"
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SUBJECT="/C=US/ST=CA/O=Rocket/CN=localhost"
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ALT="DNS:localhost"
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function gen_ca() {
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openssl genrsa -out ca_key.pem 4096
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openssl req -new -x509 -days 3650 -key ca_key.pem \
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-subj "${CA_SUBJECT}" -out ca_cert.pem
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}
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function gen_ca_if_non_existent() {
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if ! [ -f ./ca_cert.pem ]; then gen_ca; fi
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}
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function gen_rsa_sha256() {
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gen_ca_if_non_existent
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openssl req -newkey rsa:4096 -nodes -sha256 -keyout rsa_sha256_key.pem \
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-subj "${SUBJECT}" -out server.csr
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openssl x509 -req -sha256 -extfile <(printf "subjectAltName=${ALT}") -days 3650 \
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-CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial \
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-in server.csr -out rsa_sha256_cert.pem
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rm ca_cert.srl server.csr
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}
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function gen_ed25519() {
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gen_ca_if_non_existent
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openssl genpkey -algorithm ED25519 > ed25519_key.pem
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openssl req -new -key ed25519_key.pem -subj "${SUBJECT}" -out server.csr
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openssl x509 -req -extfile <(printf "subjectAltName=${ALT}") -days 3650 \
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-CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial \
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-in server.csr -out ed25519_cert.pem
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rm ca_cert.srl server.csr
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}
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function gen_ecdsa_nistp256_sha256() {
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gen_ca_if_non_existent
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openssl ecparam -out ecdsa_nistp256_sha256_key.pem -name prime256v1 -genkey
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# Convert to pkcs8 format supported by rustls
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openssl pkcs8 -topk8 -nocrypt -in ecdsa_nistp256_sha256_key.pem \
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-out ecdsa_nistp256_sha256_key_pkcs8.pem
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openssl req -new -nodes -sha256 -key ecdsa_nistp256_sha256_key_pkcs8.pem \
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-subj "${SUBJECT}" -out server.csr
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openssl x509 -req -sha256 -extfile <(printf "subjectAltName=${ALT}") -days 3650 \
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-CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial \
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-in server.csr -out ecdsa_nistp256_sha256_cert.pem
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rm ca_cert.srl server.csr ecdsa_nistp256_sha256_key.pem
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}
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function gen_ecdsa_nistp384_sha384() {
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gen_ca_if_non_existent
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openssl ecparam -out ecdsa_nistp384_sha384_key.pem -name secp384r1 -genkey
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# Convert to pkcs8 format supported by rustls
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openssl pkcs8 -topk8 -nocrypt -in ecdsa_nistp384_sha384_key.pem \
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-out ecdsa_nistp384_sha384_key_pkcs8.pem
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openssl req -new -nodes -sha384 -key ecdsa_nistp384_sha384_key_pkcs8.pem \
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-subj "${SUBJECT}" -out server.csr
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openssl x509 -req -sha384 -extfile <(printf "subjectAltName=${ALT}") -days 3650 \
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-CA ca_cert.pem -CAkey ca_key.pem -CAcreateserial \
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-in server.csr -out ecdsa_nistp384_sha384_cert.pem
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rm ca_cert.srl server.csr ecdsa_nistp384_sha384_key.pem
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}
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case $1 in
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ed25519) gen_ed25519 ;;
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rsa_sha256) gen_rsa_sha256 ;;
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ecdsa_nistp256_sha256) gen_ecdsa_nistp256_sha256 ;;
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ecdsa_nistp384_sha384) gen_ecdsa_nistp384_sha384 ;;
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*)
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gen_ed25519
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gen_rsa_sha256
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gen_ecdsa_nistp256_sha256
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gen_ecdsa_nistp384_sha384
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;;
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esac
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