43 lines
1.4 KiB
Diff
43 lines
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Xi Ruoyao <xry111@xry111.site>
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Date: Thu, 27 Jul 2023 12:18:15 +0800
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Subject: [PATCH] Fix probing of C_GetInterface
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`p11_dl_symbol (dl, "C_GetInterface")` uses dlsym() to find
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C_GetInterface in the loaded pkcs11 module. For legacy (pre-3.0) pkcs11
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modules, C_GetInterface is not defined in the module. But according to
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the documentation of dlsym():
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The search performed by dlsym() is breadth first through the
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dependency tree of these shared objects.
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So if a pkcs11 module links to libp11-kit.so, the C_GetInterface
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implementation in libp11-kit.so itself will be found. This
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C_GetInterface will return the metadata of p11-kit-proxy.so, causing
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"Refuse to load the p11-kit-proxy.so as a registered module".
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To solve the issue, if p11_dl_symbol() returns the C_GetInterface in
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libp11-kit.so itself, we should ignore it and continue trying
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C_GetFunctionList.
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---
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p11-kit/modules.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/p11-kit/modules.c b/p11-kit/modules.c
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index 8ad88ae01d5d..da0a7f04d68f 100644
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--- a/p11-kit/modules.c
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+++ b/p11-kit/modules.c
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@@ -383,6 +383,12 @@ dlopen_and_get_function_list (Module *mod,
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mod->loaded_module = dl;
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gi = p11_dl_symbol (dl, "C_GetInterface");
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+
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+#ifndef OS_WIN32
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+ if (gi == C_GetInterface)
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+ gi = NULL;
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+#endif
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+
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if (gi) {
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/* Get the default standard interface */
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rv = gi ((unsigned char *)"PKCS 11", NULL, &interface, 0);
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