sk_X509_ALGOR_pop_free(a->md_algs,X509_ALGOR_free);
PKCS7_ENC_CONTENT_free(a->enc_data);
sk_X509_pop_free(a->cert,X509_free);
sk_X509_CRL_pop_free(a->crl,X509_CRL_free);
sk_PKCS7_SIGNER_INFO_pop_free(a->signer_info,PKCS7_SIGNER_INFO_free);
sk_X509_ALGOR_pop_free(a->md_algs,X509_ALGOR_free);
PKCS7_ENC_CONTENT_free(a->enc_data);
sk_X509_pop_free(a->cert,X509_free);
sk_X509_CRL_pop_free(a->crl,X509_CRL_free);
sk_PKCS7_SIGNER_INFO_pop_free(a->signer_info,PKCS7_SIGNER_INFO_free);