mbedtls: support CURLOPT_CERTINFO

lib/vtls/mbedtls.c

@@ -73,6 +73,7 @@
 #include "mbedtls.h"
 #include "vtls.h"
 #include "vtls_int.h"
+#include "x509asn1.h"
 #include "parsedate.h"
 #include "connect.h" /* for the connect timeout */
 #include "select.h"
@@ -744,6 +745,60 @@ mbed_connect_step1(struct Curl_cfilter *cf, struct Curl_easy *data)
  return CURLE_OK;
 }
 
+static int count_server_cert(const mbedtls_x509_crt *peercert)
+{
+ int count = 1;
+
+ DEBUGASSERT(peercert);
+
+ while(peercert->next) {
+ ++count;
+ peercert = peercert->next;
+ }
+ return count;
+}
+
+static CURLcode collect_server_cert_single(struct Curl_easy *data,
+ const mbedtls_x509_crt *server_cert,
+ int idx)
+{
+ const char *beg, *end;
+
+ DEBUGASSERT(server_cert);
+
+ beg = (const char *)server_cert->raw.p;
+ end = beg + server_cert->raw.len;
+ return Curl_extract_certinfo(data, idx, beg, end);
+}
+
+static CURLcode collect_server_cert(struct Curl_cfilter *cf,
+ struct Curl_easy *data,
+ const struct mbedtls_x509_crt *peercert)
+{
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
+ const bool show_verbose_server_cert = data->set.verbose;
+#else
+ const bool show_verbose_server_cert = false;
+#endif
+ struct ssl_config_data *ssl_config = Curl_ssl_cf_get_config(cf, data);
+ CURLcode result = CURLE_PEER_FAILED_VERIFICATION;
+ int i, count;
+
+ if(!show_verbose_server_cert && !ssl_config->certinfo)
+ return CURLE_OK;
+
+ if(!peercert)
+ return result;
+
+ count = count_server_cert(peercert);
+ result = Curl_ssl_init_certinfo(data, count);
+ for(i = 0 ; !result && peercert ; i++) {
+ result = collect_server_cert_single(data, peercert, i);
+ peercert = peercert->next;
+ }
+ return result;
+}
+
 static CURLcode
 mbed_connect_step2(struct Curl_cfilter *cf, struct Curl_easy *data)
 {
@@ -807,6 +862,12 @@ mbed_connect_step2(struct Curl_cfilter *cf, struct Curl_easy *data)
 
  peercert = mbedtls_ssl_get_peer_cert(&backend->ssl);
 
+ if(peercert) {
+ const CURLcode result = collect_server_cert(cf, data, peercert);
+ if(result)
+ return result;
+ }
+
  if(peercert && data->set.verbose) {
 #ifndef MBEDTLS_X509_REMOVE_INFO
  const size_t bufsize = 16384;
@@ -1317,6 +1378,7 @@ const struct Curl_ssl Curl_ssl_mbedtls = {
 
  SSLSUPP_CA_PATH |
  SSLSUPP_CAINFO_BLOB |
+ SSLSUPP_CERTINFO |
  SSLSUPP_PINNEDPUBKEY |
  SSLSUPP_SSL_CTX |
  SSLSUPP_HTTPS_PROXY,

lib/vtls/x509asn1.c

@@ -25,13 +25,15 @@
 #include "curl_setup.h"
 
 #if defined(USE_GNUTLS) || defined(USE_WOLFSSL) || \
- defined(USE_SCHANNEL) || defined(USE_SECTRANSP)
+ defined(USE_SCHANNEL) || defined(USE_SECTRANSP) || \
+ defined(USE_MBEDTLS)
 
 #if defined(USE_WOLFSSL) || defined(USE_SCHANNEL)
 #define WANT_PARSEX509 /* uses Curl_parseX509() */
 #endif
 
-#if defined(USE_GNUTLS) || defined(USE_SCHANNEL) || defined(USE_SECTRANSP)
+#if defined(USE_GNUTLS) || defined(USE_SCHANNEL) || defined(USE_SECTRANSP) || \
+ defined(USE_MBEDTLS)
 #define WANT_EXTRACT_CERTINFO /* uses Curl_extract_certinfo() */
 #define WANT_PARSEX509 /* ... uses Curl_parseX509() */
 #endif

lib/vtls/x509asn1.h

@@ -28,7 +28,8 @@
 #include "curl_setup.h"
 
 #if defined(USE_GNUTLS) || defined(USE_WOLFSSL) || \
- defined(USE_SCHANNEL) || defined(USE_SECTRANSP)
+ defined(USE_SCHANNEL) || defined(USE_SECTRANSP) || \
+ defined(USE_MBEDTLS)
 
 #include "cfilters.h"
 #include "urldata.h"

tests/data/test3102

@@ -20,7 +20,6 @@ HTTP GET
 <features>
 SSL
 !bearssl
-!mbedtls
 !rustls
 !wolfssl
 </features>