Resolve "SMIME Support"

Closes #232

enzevalos_iphone/c/smime-helpers.c

@@ -52,7 +52,6 @@ array_with_length *create_list_of_errors() {
         linked_list * newerr = malloc(sizeof(linked_list));
         newerr->content = malloc(sizeof(unsigned long));
         memcpy(newerr->content, &err, sizeof(unsigned long));
-        newerr->content = (void*) err;
         newerr->next = NULL;
         if (first)
         {
@@ -450,35 +449,59 @@ result * get_fingerprint_from_pem(const char *pem, int md_alg) {
         goto deinit;
     }
     
-    /*switch(md_alg)
-    {
-        case 0:
-            alg = EVP_sha256();
-            break;
-        case 1:
-            alg = EVP_sha1();
-            break;
-        default:
-            alg= EVP_sha256();
+    res->res = get_fingerprint_from_X509(rec_cert, md_alg);
+deinit:
+    temp = create_list_of_errors();
+    res->errors = temp->arr;
+    res->num_errors = temp->size;
+    free(temp);
+    BIO_free(rec_cert_bio);
+    X509_free(rec_cert);
+    return res;
+}
+
+result * get_pkey_from_enc_pem(const char *pem, const char *passwd) {
+    // https://github.com/openssl/openssl/blob/master/demos/cms/cms_enc.c
+    BIO *rec_cert_bio = NULL, *out = NULL;
+    // recipient certificate
+    array_with_length *temp = NULL;
+    result *res = new_result();
+    EVP_PKEY *skey = NULL;
+    
+    // this trick allows to hardcode a certificate as a string
+    rec_cert_bio = BIO_new_mem_buf(pem, (int) strlen(pem));
+    
+    if (!rec_cert_bio) {
+        printf("Failed reading mykey.pem!\n");
+        goto deinit;
     }
     
-    if (!X509_digest(rec_cert, alg, md, &len)) {
-        printf("Failed at digest!\n");
+    skey = PEM_read_bio_PrivateKey(rec_cert_bio, NULL, NULL, (void*) passwd);
+    
+    if (!skey) {
+        printf("Failed reading pem key\n");
         goto deinit;
     }
     
-    res->res = bin_to_hex(md, len);*/
-    res->res = get_fingerprint_from_X509(rec_cert, md_alg);
+    out = BIO_new(BIO_s_mem());
+
+    if (!PEM_write_bio_PrivateKey(out, skey, NULL, NULL, 0, NULL, NULL)) {
+        printf("Failed writing pem key\n");
+        goto deinit;
+    }
+    
+    bio_to_str(out, &(res->res));
 deinit:
     temp = create_list_of_errors();
     res->errors = temp->arr;
     res->num_errors = temp->size;
     free(temp);
+    BIO_free(out);
     BIO_free(rec_cert_bio);
-    X509_free(rec_cert);
+    EVP_PKEY_free(skey);
     return res;
 }
-
-
+// EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u);
+// X509 *PEM_read_bio_X509(BIO *bp, X509 **x, pem_password_cb *cb, void *u)
 // Add function taht takes pkcs8 encrzüpted priv kez pem and utputs unencrzpted pem+fpos_t)for import=