RSA Key Generation OAEP SHA1 Padding

I am in need of a specialist who can generate an RSA key with OAEP SHA1 padding. generate RSA key with a OAEP sha1 padding and fix error
{"response_code":"36","response_description":"AES Decryption failed","error_details":"error:0607A082:digital envelope routines:EVP_CIPHER_CTX_set_key_length:invalid key length"}