Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,129 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_SSL_CTX_DATA
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_SSLVERSION (3)
+  - CURLOPT_SSL_CTX_FUNCTION (3)
+Protocol:
+  - TLS
+TLS-backend:
+  - OpenSSL
+  - wolfSSL
+  - mbedTLS
+Added-in: 7.10.6
+---
+
+# NAME
+
+CURLOPT_SSL_CTX_DATA - pointer passed to SSL context callback
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_CTX_DATA, void *pointer);
+~~~
+
+# DESCRIPTION
+
+Data *pointer* to pass to the ssl context callback set by the option
+CURLOPT_SSL_CTX_FUNCTION(3), this is the pointer you get as third
+parameter.
+
+# DEFAULT
+
+NULL
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+/* OpenSSL specific */
+
+#include <openssl/ssl.h>
+#include <curl/curl.h>
+#include <stdio.h>
+
+static CURLcode sslctx_function(CURL *curl, void *sslctx, void *pointer)
+{
+  X509_STORE *store;
+  X509 *cert = NULL;
+  BIO *bio;
+  char *mypem = pointer;
+  /* get a BIO */
+  bio = BIO_new_mem_buf(mypem, -1);
+  /* use it to read the PEM formatted certificate from memory into an
+   * X509 structure that SSL can use
+   */
+  PEM_read_bio_X509(bio, &cert, 0, NULL);
+  if(!cert)
+    printf("PEM_read_bio_X509 failed...\n");
+
+  /* get a pointer to the X509 certificate store (which may be empty) */
+  store = SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
+
+  /* add our certificate to this store */
+  if(X509_STORE_add_cert(store, cert) == 0)
+    printf("error adding certificate\n");
+
+  /* decrease reference counts */
+  X509_free(cert);
+  BIO_free(bio);
+
+  /* all set to go */
+  return CURLE_OK;
+}
+
+int main(void)
+{
+  CURL *ch;
+  CURLcode rv;
+  char *mypem = /* CA cert in PEM format, replace the XXXs */
+    "-----BEGIN CERTIFICATE-----\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
+    "-----END CERTIFICATE-----\n";
+
+  curl_global_init(CURL_GLOBAL_ALL);
+  ch = curl_easy_init();
+
+  curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
+  curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
+  curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
+
+  curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
+  curl_easy_setopt(ch, CURLOPT_SSL_CTX_DATA, mypem);
+  rv = curl_easy_perform(ch);
+  if(!rv)
+    printf("*** transfer succeeded ***\n");
+  else
+    printf("*** transfer failed ***\n");
+
+  curl_easy_cleanup(ch);
+  curl_global_cleanup();
+  return rv;
+}
+~~~
+
+# HISTORY
+
+Added in 7.11.0 for OpenSSL, in 7.42.0 for wolfSSL, in 7.54.0 for mbedTLS.
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+CURLE_OK if supported; or an error such as:
+
+CURLE_NOT_BUILT_IN - Not supported by the SSL backend
+
+CURLE_UNKNOWN_OPTION