+
+int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
+ {
+ STACK_OF(CMS_RecipientInfo) *ris;
+ CMS_RecipientInfo *ri;
+ int i, r;
+ ris = CMS_get0_RecipientInfos(cms);
+ for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
+ {
+ ri = sk_CMS_RecipientInfo_value(ris, i);
+ if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
+ continue;
+ /* If we have a cert try matching RecipientInfo
+ * otherwise try them all.
+ */
+ if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
+ {
+ CMS_RecipientInfo_set0_pkey(ri, pk);
+ r = CMS_RecipientInfo_decrypt(cms, ri);
+ CMS_RecipientInfo_set0_pkey(ri, NULL);
+ if (r > 0)
+ return 1;
+ if (cert)
+ {
+ CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
+ CMS_R_DECRYPT_ERROR);
+ return 0;
+ }
+ ERR_clear_error();
+ }
+ }
+
+ CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
+ return 0;
+
+ }
+
+int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
+ unsigned char *key, size_t keylen,
+ unsigned char *id, size_t idlen)
+ {
+ STACK_OF(CMS_RecipientInfo) *ris;
+ CMS_RecipientInfo *ri;
+ int i, r;
+ ris = CMS_get0_RecipientInfos(cms);
+ for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
+ {
+ ri = sk_CMS_RecipientInfo_value(ris, i);
+ if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
+ continue;
+
+ /* If we have an id try matching RecipientInfo
+ * otherwise try them all.
+ */
+ if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
+ {
+ CMS_RecipientInfo_set0_key(ri, key, keylen);
+ r = CMS_RecipientInfo_decrypt(cms, ri);
+ CMS_RecipientInfo_set0_key(ri, NULL, 0);
+ if (r > 0)
+ return 1;
+ if (id)
+ {
+ CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
+ CMS_R_DECRYPT_ERROR);
+ return 0;
+ }
+ ERR_clear_error();
+ }
+ }
+
+ CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
+ return 0;
+
+ }