This is a set of startup code for the DSO support, it's not yet linked into

the build process (an upcoming commit no doubt), and is very much *new*
code - what that means is that it compiles ok - usually. It certainly
doesn't mean it runs well or even properly yet. Please don't muck round
with this unless you're looking to help out and hunt bugs. :-)

Currently this code doesn't have any support for controlling the "load"
behaviour (eg. paths, filename translations, etc). That'll be handled
using DSO_ctrl() and various flags, once we work out a sensible set of
flags.

1 files changed, 251 insertions, 0 deletions

diff --git a/crypto/dso/dso_lib.c b/crypto/dso/dso_lib.c
new file mode 100644
index 0000000000..acaac27847
--- /dev/null
+++ b/crypto/dso/dso_lib.c
@@ -0,0 +1,251 @@
+/* dso_lib.c */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include "cryptlib.h"
+#include <openssl/dso.h>
+
+static DSO_METHOD *default_DSO_meth = NULL;
+
+DSO *DSO_new(void)
+	{
+	return(DSO_new_method(NULL));
+	}
+
+void DSO_set_default_method(DSO_METHOD *meth)
+	{
+	default_DSO_meth = meth;
+	}
+
+DSO_METHOD *DSO_get_default_method(void)
+	{
+	return(default_DSO_meth);
+	}
+
+DSO_METHOD *DSO_get_method(DSO *dso)
+	{
+	return(dso->meth);
+	}
+
+DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
+	{
+	DSO_METHOD *mtmp;
+	mtmp = dso->meth;
+	dso->meth = meth;
+	return(mtmp);
+	}
+
+DSO *DSO_new_method(DSO_METHOD *meth)
+	{
+	DSO *ret;
+
+	if(default_DSO_meth == NULL)
+		/* We default to DSO_METH_openssl() which in turn defaults
+		 * to stealing the "best available" method. Will fallback
+		 * to DSO_METH_null() in the worst case. */
+		default_DSO_meth = DSO_METHOD_openssl();
+	ret = (DSO *)Malloc(sizeof(DSO));
+	if(ret == NULL)
+		{
+		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
+		return(NULL);
+		}
+	memset(ret, 0, sizeof(DSO));
+	ret->meth_data = sk_new(NULL);
+	if((ret->meth_data = sk_new(NULL)) == NULL)
+		{
+		/* sk_new doesn't generate any errors so we do */
+		DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
+		Free(ret);
+		return(NULL);
+		}
+	if(meth == NULL)
+		ret->meth = default_DSO_meth;
+	else
+		ret->meth = meth;
+	ret->references = 1;
+	if((ret->meth->init != NULL) && !ret->meth->init(ret))
+		{
+		Free(ret);
+		ret=NULL;
+		}
+	return(ret);
+	}
+
+int DSO_free(DSO *dso)
+	{
+        int i;
+ 
+	if(dso == NULL)
+		{
+		DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
+		return(0);
+		}
+ 
+	i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
+#ifdef REF_PRINT
+	REF_PRINT("DSO",dso);
+#endif
+	if(i > 0) return(1);
+#ifdef REF_CHECK
+	if(i < 0)
+		{
+		fprintf(stderr,"DSO_free, bad reference count\n");
+		abort();
+		}
+#endif
+
+	if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
+		{
+		DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
+		return(0);
+		}
+ 
+	if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
+		{
+		DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
+		return(0);
+		}
+	
+	sk_free(dso->meth_data);
+ 
+	Free(dso);
+	return(1);
+	}
+
+int DSO_flags(DSO *dso)
+	{
+	return((dso == NULL) ? 0 : dso->flags);
+	}
+
+
+int DSO_up(DSO *dso)
+	{
+	if (dso == NULL)
+		{
+		DSOerr(DSO_F_DSO_UP,ERR_R_PASSED_NULL_PARAMETER);
+		return(0);
+		}
+
+	CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
+	return(1);
+	}
+
+DSO *DSO_load(DSO *dso, char *filename, DSO_METHOD *meth)
+	{
+	DSO *ret;
+	int allocated = 0;
+
+	if(filename == NULL)
+		{
+		DSOerr(DSO_F_DSO_LOAD,ERR_R_PASSED_NULL_PARAMETER);
+		return(NULL);
+		}
+	if(dso == NULL)
+		{
+		ret = DSO_new_method(meth);
+		if(ret == NULL)
+			{
+			DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
+			return(NULL);
+			}
+		allocated = 1;
+		}
+	else
+		ret = dso;
+	if(ret->meth->dso_load == NULL)
+		{
+		DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
+		if(allocated)
+			DSO_free(ret);
+		return(NULL);
+		}
+	if(!ret->meth->dso_load(ret, filename))
+		{
+		DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
+		if(allocated)
+			DSO_free(ret);
+		return(NULL);
+		}
+	/* Load succeeded */
+	return(ret);
+	}
+
+void *DSO_bind(DSO *dso, char *symname)
+	{
+	void *ret = NULL;
+
+	if((dso == NULL) || (symname == NULL))
+		{
+		DSOerr(DSO_F_DSO_BIND,ERR_R_PASSED_NULL_PARAMETER);
+		return(NULL);
+		}
+	if(dso->meth->dso_bind == NULL)
+		{
+		DSOerr(DSO_F_DSO_BIND,DSO_R_UNSUPPORTED);
+		return(NULL);
+		}
+	if(!dso->meth->dso_bind(dso, symname, &ret))
+		{
+		DSOerr(DSO_F_DSO_BIND,DSO_R_SYM_FAILURE);
+		return(NULL);
+		}
+	/* Success */
+	return(ret);
+	}