send_remote_notification.sh

#!/bin/bash

TEAM_ID=Team ID
TOKEN_KEY_FILE_NAME=path to the private key file
AUTH_KEY_ID=your key identifier
TOPIC=App ID
DEVICE_TOKEN=device token for your app
APNS_HOST_NAME=api.sandbox.push.apple.com

read -r -d '' PAYLOAD <<'EOF'
{
   "aps": {
      "badge": 1,
      "alert": {
         "title": "불꽃남자",
         "subtitle": "정대만",
         "body": "❤️"
      }
   }
}
EOF


JWT_ISSUE_TIME=$(date +%s)
JWT_HEADER=$(printf '{ "alg": "ES256", "kid": "%s" }' "${AUTH_KEY_ID}" | openssl base64 -e -A | tr -- '+/' '-_' | tr -d =)
JWT_CLAIMS=$(printf '{ "iss": "%s", "iat": %d }' "${TEAM_ID}" "${JWT_ISSUE_TIME}" | openssl base64 -e -A | tr -- '+/' '-_' | tr -d =)
JWT_HEADER_CLAIMS="${JWT_HEADER}.${JWT_CLAIMS}"
JWT_SIGNED_HEADER_CLAIMS=$(printf "${JWT_HEADER_CLAIMS}" | openssl dgst -binary -sha256 -sign "${TOKEN_KEY_FILE_NAME}" | openssl base64 -e -A | tr -- '+/' '-_' | tr -d =)
AUTHENTICATION_TOKEN="${JWT_HEADER}.${JWT_CLAIMS}.${JWT_SIGNED_HEADER_CLAIMS}"


curl -v --header "apns-topic: $TOPIC" --header "apns-push-type: alert" --header "authorization: bearer $AUTHENTICATION_TOKEN" --data "${PAYLOAD}" --http2 https://${APNS_HOST_NAME}/3/device/${DEVICE_TOKEN}

https://zeddios.tistory.com/1384