1int PKCS7_set_content_type(PKCS7 *p7, int type); 2Call to set the type of PKCS7 object we are working on 3 4int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey, 5 EVP_MD *dgst); 6Use this to setup a signer info 7There will also be functions to add signed and unsigned attributes. 8 9int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *p7i); 10Add a signer info to the content. 11 12int PKCS7_add_certificae(PKCS7 *p7, X509 *x509); 13int PKCS7_add_crl(PKCS7 *p7, X509_CRL *x509); 14 15---- 16 17p7=PKCS7_new(); 18PKCS7_set_content_type(p7,NID_pkcs7_signed); 19 20signer=PKCS7_SINGNER_INFO_new(); 21PKCS7_SIGNER_INFO_set(signer,x509,pkey,EVP_md5()); 22PKCS7_add_signer(py,signer); 23 24we are now setup. 25