add extensions to the interface for Certificate
add extensions to the interface for Certificate

Hasimir/cryptography,sholsapp/cryptography,Ayrx/cryptography,sholsapp/cryptography,Ayrx/cryptography,kimvais/cryptography,Hasimir/cryptography,Ayrx/cryptography,Hasimir/cryptography,Hasimir/cryptography,kimvais/cryptography,skeuomorf/cryptography,skeuomorf/cryptography,skeuomorf/cryptography,sholsapp/cryptography,sholsapp/cryptography,skeuomorf/cryptography,kimvais/cryptography,kimvais/cryptography,Ayrx/cryptography