apache rewrite to nginx

[Frank Dias]

I need some help, migrating from Apache to Nginx.
The following logic is in Apache, how do I convert to Nginx

<VirtualHost 172.20.1.145:443>
DocumentRoot "/var/www/default"
ServerName *.diasranch.net
SSLProxyEngine On
ProxyPreserveHost On
RewriteEngine on
RewriteMap host_finder prg:/usr/local/bin/host_finder.php
# Rule to handle the + character in (un)marking a voicemail and Par Cntl
RewriteCond %{HTTP_HOST} ^rwa-(.*) [OR]
RewriteCond %{HTTP_HOST} ^m2m-(.*) [OR]
RewriteCond %{HTTP_HOST} ^dwa-(.*)
RewriteRule ^(/ws/v[1-9]/dias/[^+]*)\+([^+]*)$ https://${host_finder:%{HTTP_HOST}}/$1\%2B$2<https://$%7bhost_finder:%25%7bHTTP_HOST%7d%7d/$1/%2B$2> [NE,P,L]
RewriteCond %{HTTP_HOST} ^rwa-(.*) [OR]
RewriteCond %{HTTP_HOST} ^m2m-(.*) [OR]
RewriteCond %{HTTP_HOST} ^dwa-(.*)
RewriteRule ^(/ws/v[1-9]/dias/.*)\+(.*)$ $1\%2B$2 [N,NE]
# The next rule catches everything else and does not use the NE flag
RewriteCond %{HTTP_HOST} ^rwa-(.*) [OR]
RewriteCond %{HTTP_HOST} ^m2m-(.*) [OR]
RewriteCond %{HTTP_HOST} ^dwa-(.*)
RewriteRule ^/(.*) https://${host_finder:%{HTTP_HOST}}/$1<https://$%7bhost_finder:%25%7bHTTP_HOST%7d%7d/$1> [P,L]
# The next rule is to defeat TRACE attecks which is a med security CVE
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
ErrorLog logs/ssl_error_log
#TransferLog logs/ssl_access_log
LogLevel warn
SSLEngine on
SSLProxyProtocol all -SSLv2 -SSLv3
SSLProtocol all -SSLv2 -SSLv3
SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
SSLCertificateFile /etc/pki/tls/certs/star.diasranch.net.crt
SSLCertificateKeyFile /etc/pki/tls/private/star.diasranch.net_key.pem
SSLCertificateChainFile /etc/pki/tls/certs/star.diasranch.net.crt
SSLCACertificateFile /etc/pki/tls/certs/ca-bundle.crt
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown downgrade-1.0 force-response-1.0
#CustomLog logs/ssl_request_log "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x [%r] %b"
CustomLog /dev/null " "
</VirtualHost>

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