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DIGITAL SIGNATURE API REQUIREMENT : 1)We developing one web application for Import/Export Business of India.For that we need to create different types of files and upload on government portal. So,in my web application when we export our be(Bill of Entry File)/sb(Shipping Bill) file from our software we have to sign it digitally

2)we need signing algorithm to sign that file using 6 types of digital signature of CLASS 3 type like emudra,capricorn,tcs etc..

3)read signature in php because our project is in php codeigniter.