fix: situation with nested paths/secrets (#24)

* fix: vault-backup validation

vault-backup.sh

@@ -19,22 +19,66 @@ aws s3 cp /app/vault_${date}.snap s3://${s3_destination}
 unset VAULT_TOKEN
 echo "Uploaded backup to s3. BUT we still need to validate the backup!!"
 echo "Assuming vault-reader-role in vault"
-export VAULT_TOKEN=$(vault write -field=token auth/kubernetes/login jwt=$SA_TOKEN role=reader-role);
-echo "Reading first secret available in current vault environment. if it was updated since the backup was taken then this backup may fail!"
-FIRST_SECRET=$(vault list -format=json secret/metadata/ | jq -r '.[0]')
+# Authenticate and set VAULT_TOKEN
+export VAULT_TOKEN=$(vault write -field=token auth/kubernetes/login jwt=$SA_TOKEN role=reader-role)
+
+echo "Reading first secret available in current vault environment with actual data. If it was updated since the backup was taken then this backup may fail!"
+
+# Global variable to store the first secret with data
+FIRST_SECRET=""
+
+# Function to find the first secret with data
+function find_first_secret_with_data() {
+    # Exit if we have already found a secret
+    if [[ -n "$FIRST_SECRET" ]]; then
+        return
+    fi
+
+    local path=$1
+    local secrets=$(vault list -format=json "${path}" | jq -r '.[]' | grep -v '^\s*$')
+
+    for secret in $secrets; do
+        if [[ $secret == */ ]]; then
+            # It's a directory, go deeper
+            find_first_secret_with_data "${path}${secret}"
+        else
+            # Adjust the path for reading the secret
+            local adjusted_path="${path}${secret}"
+            adjusted_path=${adjusted_path/\/metadata\//\/data\/}
+            local secret_data=$(vault read -format=json "$adjusted_path" | jq '.data')
+            if [[ $secret_data != "{}" && $secret_data != "null" ]]; then
+                FIRST_SECRET="$adjusted_path"
+                return
+            fi
+        fi
+    done
+}
+
+# Find the first secret with actual data
+find_first_secret_with_data "secret/metadata/"
+echo "Found first secret with data: $FIRST_SECRET"
+
+# Reading the data/values within the first secret
 echo "Reading the data/values within the first secret"
-VAULT_OUTPUT=$(vault read -format=json "secret/data/$FIRST_SECRET")
+VAULT_OUTPUT=$(vault read -format=json "$FIRST_SECRET")
 KEY_VALUES=$(echo $VAULT_OUTPUT | jq '.data.data')
+
+# Rest of your script logic
 echo "Getting s3 presigned url for vault backup"
 BACKUP_S3_PRESIGNED_URL=$(aws s3 presign s3://${s3_destination} --expires-in 300)
 echo "Getting s3 presigned url for vault access tokens"
 TOKENS_S3_PRESIGNED_URL=$(aws s3 presign s3://${S3_BUCKET_NAME}/${CAPTAIN_DOMAIN}/hashicorp-vault-init/vault_access.json --expires-in 300)
+
 BASE_JSON='{
     "source_backup_url": "'"$BACKUP_S3_PRESIGNED_URL"'",
     "source_keys_url": "'"$TOKENS_S3_PRESIGNED_URL"'",
     "path_values_map":{},
     "vault_version": "1.14.8"
 }'
-UPDATED_JSON=$(echo $BASE_JSON | jq --arg path "secret/$FIRST_SECRET" --argjson kv "$KEY_VALUES" '.path_values_map[$path] = $kv')
+
+FIRST_SECRET_NO_PREFIX=${FIRST_SECRET#"secret/data/"}
+
+UPDATED_JSON=$(echo $BASE_JSON | jq --arg path "secret/$FIRST_SECRET_NO_PREFIX" --argjson kv "$KEY_VALUES" '.path_values_map[$path] = $kv')
+
 echo "Validating Backup now....."
 curl glueops-backup-and-exports.glueops-core-backup.svc.cluster.local:8080/api/v1/validate --fail-with-body -X POST -d "${UPDATED_JSON}"