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diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
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index 0a2f260..606b6e2 100644
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--- a/src/event/ngx_event_openssl.c
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+++ b/src/event/ngx_event_openssl.c
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@@ -616,6 +616,71 @@ ngx_ssl_load_certificate(ngx_pool_t *pool, char **err, ngx_str_t *cert,
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X509 *x509, *temp;
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u_long n;
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+ if (ngx_strncmp(cert->data, "engine:", sizeof("engine:") - 1) == 0) {
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+
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+#ifndef OPENSSL_NO_ENGINE
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+
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+ u_char *p, *last;
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+ ENGINE *engine;
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+
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+ p = cert->data + sizeof("engine:") - 1;
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+ last = (u_char *) ngx_strchr(p, ':');
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+
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+ if (last == NULL) {
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+ *err = "invalid syntax";
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+ return NULL;
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+ }
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+
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+ *last = '\0';
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+
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+ engine = ENGINE_by_id((char *) p);
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+
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+ if (engine == NULL) {
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+ *err = "ENGINE_by_id() failed";
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+ return NULL;
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+ }
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+
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+ if (!ENGINE_init(engine)) {
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+ *err = "ENGINE_init() failed";
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+ ENGINE_free(engine);
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+ return NULL;
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+ }
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+
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+ *last++ = ':';
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+
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+ struct {
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+ const char *cert_id;
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+ X509 *cert;
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+ } params = { (char *) last, NULL };
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+
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+ if (!ENGINE_ctrl_cmd(engine, "LOAD_CERT_CTRL", 0, ¶ms, NULL, 1)) {
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+ *err = "ENGINE_ctrl_cmd() failed - Unable to get the certificate";
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+ ENGINE_free(engine);
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+ return NULL;
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+ }
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+
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+ ENGINE_finish(engine);
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+ ENGINE_free(engine);
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+
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+ /* set chain to null */
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+
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+ *chain = sk_X509_new_null();
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+ if (*chain == NULL) {
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+ *err = "sk_X509_new_null() failed";
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+ X509_free(params.cert);
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+ return NULL;
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+ }
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+
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+ return params.cert;
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+
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+#else
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+
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+ *err = "loading \"engine:...\" certificate is not supported";
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+ return NULL;
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+
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+#endif
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+ }
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+
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if (ngx_strncmp(cert->data, "data:", sizeof("data:") - 1) == 0) {
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bio = BIO_new_mem_buf(cert->data + sizeof("data:") - 1,
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