#include <openssl/pkcs7.h>

              #include <openssl/objects.h>

              #include <openssl/pem.h>

              int    main()

              {

                     BIO        *b;

                     PKCS7    *p7;

             

                     b=BIO_new_file("p7Digest.pem","r");

                     p7=PEM_read_bio_PKCS7(b,NULL,NULL,NULL);

                     BIO_free(b);

                     PKCS7_free(p7);

                     return 0;

              }

              本例用于读取PEM格式的PKCS7数据。