- {
- BIO *in;
- int ret=0;
- X509 *x=NULL;
-
- ERR_clear_error(); /* clear error stack for SSL_CTX_use_certificate() */
-
- in = BIO_new(BIO_s_file_internal());
- if (in == NULL)
- {
- SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_BUF_LIB);
- goto end;
- }
-
- if (BIO_read_filename(in,file) <= 0)
- {
- SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_SYS_LIB);
- goto end;
- }
-
- x=PEM_read_bio_X509_AUX(in,NULL,ctx->default_passwd_callback,
- ctx->default_passwd_callback_userdata);
- if (x == NULL)
- {
- SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_PEM_LIB);
- goto end;
- }
-
- ret = SSL_CTX_use_certificate(ctx, x);
-
- if (ERR_peek_error() != 0)
- ret = 0; /* Key/certificate mismatch doesn't imply ret==0 ... */
- if (ret)
- {
- /* If we could set up our certificate, now proceed to
- * the CA certificates.
- */
- X509 *ca;
- int r;
- unsigned long err;
-
- if (ctx->extra_certs != NULL)
- {
- sk_X509_pop_free(ctx->extra_certs, X509_free);
- ctx->extra_certs = NULL;
- }
-
- while ((ca = PEM_read_bio_X509(in, NULL,
- ctx->default_passwd_callback,
- ctx->default_passwd_callback_userdata))
- != NULL)
- {
- r = SSL_CTX_add_extra_chain_cert(ctx, ca);
- if (!r)
- {
- X509_free(ca);
- ret = 0;
- goto end;
- }
- /* Note that we must not free r if it was successfully
- * added to the chain (while we must free the main
- * certificate, since its reference count is increased
- * by SSL_CTX_use_certificate). */
- }
- /* When the while loop ends, it's usually just EOF. */
- err = ERR_peek_last_error();
- if (ERR_GET_LIB(err) == ERR_LIB_PEM && ERR_GET_REASON(err) == PEM_R_NO_START_LINE)
- ERR_clear_error();
- else
- ret = 0; /* some real error */
- }
-
-end:
- if (x != NULL) X509_free(x);
- if (in != NULL) BIO_free(in);
- return(ret);
- }
-#endif
+{
+ return use_certificate_chain_file(ctx, NULL, file);
+}
+
+int SSL_use_certificate_chain_file(SSL *ssl, const char *file)
+{
+ return use_certificate_chain_file(NULL, ssl, file);
+}
+
+static int serverinfo_find_extension(const unsigned char *serverinfo,
+ size_t serverinfo_length,
+ unsigned int extension_type,
+ const unsigned char **extension_data,
+ size_t *extension_length)
+{
+ *extension_data = NULL;
+ *extension_length = 0;
+ if (serverinfo == NULL || serverinfo_length == 0)
+ return -1;
+ for (;;) {
+ unsigned int type = 0;
+ size_t len = 0;
+
+ /* end of serverinfo */
+ if (serverinfo_length == 0)
+ return 0; /* Extension not found */
+
+ /* read 2-byte type field */
+ if (serverinfo_length < 2)
+ return -1; /* Error */
+ type = (serverinfo[0] << 8) + serverinfo[1];
+ serverinfo += 2;
+ serverinfo_length -= 2;
+
+ /* read 2-byte len field */
+ if (serverinfo_length < 2)
+ return -1; /* Error */
+ len = (serverinfo[0] << 8) + serverinfo[1];
+ serverinfo += 2;
+ serverinfo_length -= 2;
+
+ if (len > serverinfo_length)
+ return -1; /* Error */
+
+ if (type == extension_type) {
+ *extension_data = serverinfo;
+ *extension_length = len;
+ return 1; /* Success */
+ }
+
+ serverinfo += len;
+ serverinfo_length -= len;
+ }
+ /* Unreachable */
+}
+
+static int serverinfo_srv_parse_cb(SSL *s, unsigned int ext_type,
+ const unsigned char *in,
+ size_t inlen, int *al, void *arg)
+{
+
+ if (inlen != 0) {
+ *al = SSL_AD_DECODE_ERROR;
+ return 0;
+ }
+
+ return 1;
+}
+
+static int serverinfo_srv_add_cb(SSL *s, unsigned int ext_type,
+ const unsigned char **out, size_t *outlen,
+ int *al, void *arg)
+{
+ const unsigned char *serverinfo = NULL;
+ size_t serverinfo_length = 0;
+
+ /* Is there serverinfo data for the chosen server cert? */
+ if ((ssl_get_server_cert_serverinfo(s, &serverinfo,
+ &serverinfo_length)) != 0) {
+ /* Find the relevant extension from the serverinfo */
+ int retval = serverinfo_find_extension(serverinfo, serverinfo_length,
+ ext_type, out, outlen);
+ if (retval == -1) {
+ *al = SSL_AD_DECODE_ERROR;
+ return -1; /* Error */
+ }
+ if (retval == 0)
+ return 0; /* No extension found, don't send extension */
+ return 1; /* Send extension */
+ }
+ return 0; /* No serverinfo data found, don't send
+ * extension */
+}
+
+/*
+ * With a NULL context, this function just checks that the serverinfo data
+ * parses correctly. With a non-NULL context, it registers callbacks for
+ * the included extensions.
+ */
+static int serverinfo_process_buffer(const unsigned char *serverinfo,
+ size_t serverinfo_length, SSL_CTX *ctx)
+{
+ if (serverinfo == NULL || serverinfo_length == 0)
+ return 0;
+ for (;;) {
+ unsigned int ext_type = 0;
+ size_t len = 0;
+
+ /* end of serverinfo */
+ if (serverinfo_length == 0)
+ return 1;
+
+ /* read 2-byte type field */
+ if (serverinfo_length < 2)
+ return 0;
+ /* FIXME: check for types we understand explicitly? */
+
+ /* Register callbacks for extensions */
+ ext_type = (serverinfo[0] << 8) + serverinfo[1];
+ if (ctx) {
+ int have_ext_cbs = 0;
+ size_t i;
+ custom_ext_methods *exts = &ctx->cert->srv_ext;
+ custom_ext_method *meth = exts->meths;
+
+ for (i = 0; i < exts->meths_count; i++, meth++) {
+ if (ext_type == meth->ext_type) {
+ have_ext_cbs = 1;
+ break;
+ }
+ }
+
+ if (!have_ext_cbs && !SSL_CTX_add_server_custom_ext(ctx, ext_type,
+ serverinfo_srv_add_cb,
+ NULL, NULL,
+ serverinfo_srv_parse_cb,
+ NULL))
+ return 0;
+ }
+
+ serverinfo += 2;
+ serverinfo_length -= 2;
+
+ /* read 2-byte len field */
+ if (serverinfo_length < 2)
+ return 0;
+ len = (serverinfo[0] << 8) + serverinfo[1];
+ serverinfo += 2;
+ serverinfo_length -= 2;
+
+ if (len > serverinfo_length)
+ return 0;
+
+ serverinfo += len;
+ serverinfo_length -= len;
+ }
+}
+
+int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
+ size_t serverinfo_length)
+{
+ unsigned char *new_serverinfo;
+
+ if (ctx == NULL || serverinfo == NULL || serverinfo_length == 0) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ if (!serverinfo_process_buffer(serverinfo, serverinfo_length, NULL)) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA);
+ return 0;
+ }
+ if (ctx->cert->key == NULL) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+ new_serverinfo = OPENSSL_realloc(ctx->cert->key->serverinfo,
+ serverinfo_length);
+ if (new_serverinfo == NULL) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ ctx->cert->key->serverinfo = new_serverinfo;
+ memcpy(ctx->cert->key->serverinfo, serverinfo, serverinfo_length);
+ ctx->cert->key->serverinfo_length = serverinfo_length;
+
+ /*
+ * Now that the serverinfo is validated and stored, go ahead and
+ * register callbacks.
+ */
+ if (!serverinfo_process_buffer(serverinfo, serverinfo_length, ctx)) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA);
+ return 0;
+ }
+ return 1;
+}
+
+int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file)
+{
+ unsigned char *serverinfo = NULL;
+ unsigned char *tmp;
+ size_t serverinfo_length = 0;
+ unsigned char *extension = 0;
+ long extension_length = 0;
+ char *name = NULL;
+ char *header = NULL;
+ char namePrefix[] = "SERVERINFO FOR ";
+ int ret = 0;
+ BIO *bin = NULL;
+ size_t num_extensions = 0;
+
+ if (ctx == NULL || file == NULL) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PASSED_NULL_PARAMETER);
+ goto end;
+ }
+
+ bin = BIO_new(BIO_s_file());
+ if (bin == NULL) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_BUF_LIB);
+ goto end;
+ }
+ if (BIO_read_filename(bin, file) <= 0) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_SYS_LIB);
+ goto end;
+ }
+
+ for (num_extensions = 0;; num_extensions++) {
+ if (PEM_read_bio(bin, &name, &header, &extension, &extension_length)
+ == 0) {
+ /*
+ * There must be at least one extension in this file
+ */
+ if (num_extensions == 0) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
+ SSL_R_NO_PEM_EXTENSIONS);
+ goto end;
+ } else /* End of file, we're done */
+ break;
+ }
+ /* Check that PEM name starts with "BEGIN SERVERINFO FOR " */
+ if (strlen(name) < strlen(namePrefix)) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_PEM_NAME_TOO_SHORT);
+ goto end;
+ }
+ if (strncmp(name, namePrefix, strlen(namePrefix)) != 0) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE,
+ SSL_R_PEM_NAME_BAD_PREFIX);
+ goto end;
+ }
+ /*
+ * Check that the decoded PEM data is plausible (valid length field)
+ */
+ if (extension_length < 4
+ || (extension[2] << 8) + extension[3] != extension_length - 4) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_BAD_DATA);
+ goto end;
+ }
+ /* Append the decoded extension to the serverinfo buffer */
+ tmp = OPENSSL_realloc(serverinfo, serverinfo_length + extension_length);
+ if (tmp == NULL) {
+ SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_MALLOC_FAILURE);
+ goto end;
+ }
+ serverinfo = tmp;
+ memcpy(serverinfo + serverinfo_length, extension, extension_length);
+ serverinfo_length += extension_length;
+
+ OPENSSL_free(name);
+ name = NULL;
+ OPENSSL_free(header);
+ header = NULL;
+ OPENSSL_free(extension);
+ extension = NULL;
+ }
+
+ ret = SSL_CTX_use_serverinfo(ctx, serverinfo, serverinfo_length);
+ end:
+ /* SSL_CTX_use_serverinfo makes a local copy of the serverinfo. */
+ OPENSSL_free(name);
+ OPENSSL_free(header);
+ OPENSSL_free(extension);
+ OPENSSL_free(serverinfo);
+ BIO_free(bin);
+ return ret;
+}