+static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK_OF(OPENSSL_STRING) *ns)
+ {
+ int i;
+ STACK_OF(GENERAL_NAMES) *ret;
+ GENERAL_NAMES *gens = NULL;
+ GENERAL_NAME *gen = NULL;
+ ret = sk_GENERAL_NAMES_new_null();
+ if (!ret)
+ goto err;
+ for (i = 0; i < sk_OPENSSL_STRING_num(ns); i++)
+ {
+ char *str = sk_OPENSSL_STRING_value(ns, i);
+ gen = a2i_GENERAL_NAME(NULL, NULL, NULL, GEN_EMAIL, str, 0);
+ if (!gen)
+ goto err;
+ gens = GENERAL_NAMES_new();
+ if (!gens)
+ goto err;
+ if (!sk_GENERAL_NAME_push(gens, gen))
+ goto err;
+ gen = NULL;
+ if (!sk_GENERAL_NAMES_push(ret, gens))
+ goto err;
+ gens = NULL;
+ }
+
+ return ret;
+
+ err:
+ if (ret)
+ sk_GENERAL_NAMES_pop_free(ret, GENERAL_NAMES_free);
+ if (gens)
+ GENERAL_NAMES_free(gens);
+ if (gen)
+ GENERAL_NAME_free(gen);
+ return NULL;
+ }
+
+
+static CMS_ReceiptRequest *make_receipt_request(STACK_OF(OPENSSL_STRING) *rr_to,
+ int rr_allorfirst,
+ STACK_OF(OPENSSL_STRING) *rr_from)
+ {
+ STACK_OF(GENERAL_NAMES) *rct_to, *rct_from;
+ CMS_ReceiptRequest *rr;
+ rct_to = make_names_stack(rr_to);
+ if (!rct_to)
+ goto err;
+ if (rr_from)
+ {
+ rct_from = make_names_stack(rr_from);
+ if (!rct_from)
+ goto err;
+ }
+ else
+ rct_from = NULL;
+ rr = CMS_ReceiptRequest_create0(NULL, -1, rr_allorfirst, rct_from,
+ rct_to);
+ return rr;
+ err:
+ return NULL;
+ }
+
+static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,
+ STACK_OF(OPENSSL_STRING) *param)
+ {
+ char *keyopt;
+ int i;
+ if (sk_OPENSSL_STRING_num(param) <= 0)
+ return 1;
+ for (i = 0; i < sk_OPENSSL_STRING_num(param); i++)
+ {
+ keyopt = sk_OPENSSL_STRING_value(param, i);
+ if (pkey_ctrl_string(pctx, keyopt) <= 0)
+ {
+ BIO_printf(bio_err, "parameter error \"%s\"\n",
+ keyopt);
+ ERR_print_errors(bio_err);
+ return 0;
+ }
+ }
+ return 1;
+ }
+