Update WIP discord and some vendors.

CPR has features disabled and PCRE is fully disabled until updated to new code.

vendor/CPR/cpr/ssl_ctx.cpp

@@ -0,0 +1,70 @@
+
+#include "cpr/ssl_ctx.h"
+
+#if SUPPORT_CURLOPT_SSL_CTX_FUNCTION
+
+#ifdef OPENSSL_BACKEND_USED
+
+#include <openssl/err.h>
+#include <openssl/safestack.h>
+#include <openssl/ssl.h>
+
+namespace cpr {
+
+/**
+ * The ssl_ctx parameter is actually a pointer to the SSL library's SSL_CTX for OpenSSL.
+ * If an error is returned from the callback no attempt to establish a connection is made and
+ * the perform operation will return the callback's error code.
+ *
+ * Sources: https://curl.se/libcurl/c/CURLOPT_SSL_CTX_FUNCTION.html
+ *          https://curl.se/libcurl/c/CURLOPT_SSL_CTX_DATA.html
+ */
+CURLcode sslctx_function_load_ca_cert_from_buffer(CURL* /*curl*/, void* sslctx, void* raw_cert_buf) {
+    // Check arguments
+    if (raw_cert_buf == nullptr || sslctx == nullptr) {
+        printf("Invalid callback arguments\n");
+        return CURLE_ABORTED_BY_CALLBACK;
+    }
+
+    // Setup pointer
+    X509_STORE* store = nullptr;
+    X509* cert = nullptr;
+    BIO* bio = nullptr;
+    char* cert_buf = static_cast<char*>(raw_cert_buf);
+
+    // Create a memory BIO using the data of cert_buf.
+    // Note: It is assumed, that cert_buf is nul terminated and its length is determined by strlen.
+    bio = BIO_new_mem_buf(cert_buf, -1);
+
+    // Load the PEM formatted certicifate into an X509 structure which OpenSSL can use.
+    PEM_read_bio_X509(bio, &cert, nullptr, nullptr);
+    if (cert == nullptr) {
+        printf("PEM_read_bio_X509 failed\n");
+        return CURLE_ABORTED_BY_CALLBACK;
+    }
+
+    // Get a pointer to the current certificate verification storage
+    store = SSL_CTX_get_cert_store(static_cast<SSL_CTX*>(sslctx));
+
+    // Add the loaded certificate to the verification storage
+    const int status = X509_STORE_add_cert(store, cert);
+    if (status == 0) {
+        printf("Error adding certificate\n");
+        return CURLE_ABORTED_BY_CALLBACK;
+    }
+
+    // Decrement the reference count of the X509 structure cert and frees it up
+    X509_free(cert);
+
+    // Free the entire bio chain
+    BIO_free(bio);
+
+    // The CA certificate was loaded successfully into the verification storage
+    return CURLE_OK;
+}
+
+} // namespace cpr
+
+#endif // OPENSSL_BACKEND_USED
+
+#endif // SUPPORT_CURLOPT_SSL_CTX_FUNCTION