Vendor import of OpenSSL 0.9.8b

5 files changed, 657 insertions, 0 deletions

diff --git a/crypto/openssl/crypto/pqueue/Makefile b/crypto/openssl/crypto/pqueue/Makefile
new file mode 100644
index 0000000..d0c39d2
--- /dev/null
+++ b/crypto/openssl/crypto/pqueue/Makefile
@@ -0,0 +1,84 @@
+#
+# OpenSSL/crypto/pqueue/Makefile
+#
+
+DIR=	pqueue
+TOP=	../..
+CC=	cc
+INCLUDES=
+CFLAG=-g
+MAKEFILE=	Makefile
+AR=		ar r
+
+CFLAGS= $(INCLUDES) $(CFLAG)
+
+GENERAL=Makefile
+TEST=
+APPS=
+
+LIB=$(TOP)/libcrypto.a
+LIBSRC=pqueue.c
+LIBOBJ=pqueue.o
+
+SRC= $(LIBSRC)
+
+EXHEADER= pqueue.h pq_compat.h
+HEADER=	$(EXHEADER)
+
+ALL=    $(GENERAL) $(SRC) $(HEADER)
+
+top:
+	(cd ../..; $(MAKE) DIRS=crypto SDIRS=$(DIR) sub_all)
+
+all:	lib
+
+lib:	$(LIBOBJ)
+	$(AR) $(LIB) $(LIBOBJ)
+	$(RANLIB) $(LIB) || echo Never mind.
+	@touch lib
+
+files:
+	$(PERL) $(TOP)/util/files.pl Makefile >> $(TOP)/MINFO
+
+links:
+	@$(PERL) $(TOP)/util/mklink.pl ../../include/openssl $(EXHEADER)
+	@$(PERL) $(TOP)/util/mklink.pl ../../test $(TEST)
+	@$(PERL) $(TOP)/util/mklink.pl ../../apps $(APPS)
+
+install:
+	@[ -n "$(INSTALLTOP)" ] # should be set by top Makefile...
+	@headerlist="$(EXHEADER)"; for i in $$headerlist ; \
+	do  \
+	(cp $$i $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i; \
+	chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i ); \
+	done;
+
+tags:
+	ctags $(SRC)
+
+tests:
+
+lint:
+	lint -DLINT $(INCLUDES) $(SRC)>fluff
+
+depend:
+	@[ -n "$(MAKEDEPEND)" ] # should be set by upper Makefile...
+	$(MAKEDEPEND) -- $(CFLAG) $(INCLUDES) $(DEPFLAG) -- $(PROGS) $(LIBSRC)
+
+dclean:
+	$(PERL) -pe 'if (/^# DO NOT DELETE THIS LINE/) {print; exit(0);}' $(MAKEFILE) >Makefile.new
+	mv -f Makefile.new $(MAKEFILE)
+
+clean:
+	rm -f *.o *.obj lib tags core .pure .nfs* *.old *.bak fluff
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+pqueue.o: ../../e_os.h ../../include/openssl/bio.h ../../include/openssl/bn.h
+pqueue.o: ../../include/openssl/buffer.h ../../include/openssl/crypto.h
+pqueue.o: ../../include/openssl/e_os2.h ../../include/openssl/err.h
+pqueue.o: ../../include/openssl/lhash.h ../../include/openssl/opensslconf.h
+pqueue.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
+pqueue.o: ../../include/openssl/pq_compat.h ../../include/openssl/safestack.h
+pqueue.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
+pqueue.o: ../cryptlib.h pqueue.c pqueue.h
diff --git a/crypto/openssl/crypto/pqueue/pq_compat.h b/crypto/openssl/crypto/pqueue/pq_compat.h
new file mode 100644
index 0000000..28c58a0
--- /dev/null
+++ b/crypto/openssl/crypto/pqueue/pq_compat.h
@@ -0,0 +1,147 @@
+/* crypto/pqueue/pqueue_compat.h */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 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
+ *    openssl-core@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 "opensslconf.h"
+#include <openssl/bn.h>
+
+/* 
+ * The purpose of this header file is for supporting 64-bit integer
+ * manipulation on 32-bit (and lower) machines.  Currently the only
+ * such environment is VMS, Utrix and those with smaller default integer
+ * sizes than 32 bits.  For all such environment, we fall back to using
+ * BIGNUM.  We may need to fine tune the conditions for systems that
+ * are incorrectly configured.
+ *
+ * The only clients of this code are (1) pqueue for priority, and
+ * (2) DTLS, for sequence number manipulation.
+ */
+
+#if (defined(THIRTY_TWO_BIT) && !defined(BN_LLONG)) || defined(SIXTEEN_BIT) || defined(EIGHT_BIT)
+
+#define PQ_64BIT_IS_INTEGER 0
+#define PQ_64BIT_IS_BIGNUM 1
+
+#define PQ_64BIT     BIGNUM
+#define PQ_64BIT_CTX BN_CTX
+
+#define pq_64bit_init(x)           BN_init(x)
+#define pq_64bit_free(x)           BN_free(x)
+
+#define pq_64bit_ctx_new(ctx)      BN_CTX_new()
+#define pq_64bit_ctx_free(x)       BN_CTX_free(x)
+
+#define pq_64bit_assign(x, y)      BN_copy(x, y)
+#define pq_64bit_assign_word(x, y) BN_set_word(x, y)
+#define pq_64bit_gt(x, y)          BN_ucmp(x, y) >= 1 ? 1 : 0
+#define pq_64bit_eq(x, y)          BN_ucmp(x, y) == 0 ? 1 : 0
+#define pq_64bit_add_word(x, w)    BN_add_word(x, w)
+#define pq_64bit_sub(r, x, y)      BN_sub(r, x, y)
+#define pq_64bit_sub_word(x, w)    BN_sub_word(x, w)
+#define pq_64bit_mod(r, x, n, ctx) BN_mod(r, x, n, ctx)
+
+#define pq_64bit_bin2num(bn, bytes, len)   BN_bin2bn(bytes, len, bn)
+#define pq_64bit_num2bin(bn, bytes)        BN_bn2bin(bn, bytes)
+#define pq_64bit_get_word(x)               BN_get_word(x)
+#define pq_64bit_is_bit_set(x, offset)     BN_is_bit_set(x, offset)
+#define pq_64bit_lshift(r, x, shift)       BN_lshift(r, x, shift)
+#define pq_64bit_set_bit(x, num)           BN_set_bit(x, num)
+#define pq_64bit_get_length(x)             BN_num_bits((x))
+
+#else
+
+#define PQ_64BIT_IS_INTEGER 1
+#define PQ_64BIT_IS_BIGNUM 0
+
+#if defined(SIXTY_FOUR_BIT)
+#define PQ_64BIT BN_ULONG
+#define PQ_64BIT_PRINT "%lld"
+#elif defined(SIXTY_FOUR_BIT_LONG)
+#define PQ_64BIT BN_ULONG
+#define PQ_64BIT_PRINT "%ld"
+#elif defined(THIRTY_TWO_BIT)
+#define PQ_64BIT BN_ULLONG
+#define PQ_64BIT_PRINT "%lld"
+#endif
+
+#define PQ_64BIT_CTX      void
+
+#define pq_64bit_init(x)
+#define pq_64bit_free(x)
+#define pq_64bit_ctx_new(ctx)        (ctx)
+#define pq_64bit_ctx_free(x)
+
+#define pq_64bit_assign(x, y)        (*(x) = *(y))
+#define pq_64bit_assign_word(x, y)   (*(x) = y)
+#define pq_64bit_gt(x, y)	         (*(x) > *(y))
+#define pq_64bit_eq(x, y)            (*(x) == *(y))
+#define pq_64bit_add_word(x, w)      (*(x) = (*(x) + (w)))
+#define pq_64bit_sub(r, x, y)        (*(r) = (*(x) - *(y)))
+#define pq_64bit_sub_word(x, w)      (*(x) = (*(x) - (w)))
+#define pq_64bit_mod(r, x, n, ctx)
+
+#define pq_64bit_bin2num(num, bytes, len) bytes_to_long_long(bytes, num)
+#define pq_64bit_num2bin(num, bytes)      long_long_to_bytes(num, bytes)
+#define pq_64bit_get_word(x)              *(x)
+#define pq_64bit_lshift(r, x, shift)      (*(r) = (*(x) << (shift)))
+#define pq_64bit_set_bit(x, num)          do { \
+                                              PQ_64BIT mask = 1; \
+                                              mask = mask << (num); \
+                                              *(x) |= mask; \
+                                          } while(0)
+#endif /* OPENSSL_SYS_VMS */
diff --git a/crypto/openssl/crypto/pqueue/pq_test.c b/crypto/openssl/crypto/pqueue/pq_test.c
new file mode 100644
index 0000000..8d496dfc
--- /dev/null
+++ b/crypto/openssl/crypto/pqueue/pq_test.c
@@ -0,0 +1,95 @@
+/* crypto/pqueue/pq_test.c */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 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
+ *    openssl-core@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 "pqueue.h"
+
+int
+main(void)
+	{
+	pitem *item;
+	pqueue pq;
+
+	pq = pqueue_new();
+
+	item = pitem_new(3, NULL);
+	pqueue_insert(pq, item);
+
+	item = pitem_new(1, NULL);
+	pqueue_insert(pq, item);
+
+	item = pitem_new(2, NULL);
+	pqueue_insert(pq, item);
+
+	item = pqueue_find(pq, 1);
+	fprintf(stderr, "found %ld\n", item->priority);
+
+	item = pqueue_find(pq, 2);
+	fprintf(stderr, "found %ld\n", item->priority);
+
+	item = pqueue_find(pq, 3);
+	fprintf(stderr, "found %ld\n", item ? item->priority: 0);
+
+	pqueue_print(pq);
+
+	for(item = pqueue_pop(pq); item != NULL; item = pqueue_pop(pq))
+		pitem_free(item);
+
+	pqueue_free(pq);
+	return 0;
+	}
diff --git a/crypto/openssl/crypto/pqueue/pqueue.c b/crypto/openssl/crypto/pqueue/pqueue.c
new file mode 100644
index 0000000..5cc1852
--- /dev/null
+++ b/crypto/openssl/crypto/pqueue/pqueue.c
@@ -0,0 +1,236 @@
+/* crypto/pqueue/pqueue.c */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 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
+ *    openssl-core@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 "cryptlib.h"
+#include <openssl/bn.h>
+#include "pqueue.h"
+
+typedef struct _pqueue
+	{
+	pitem *items;
+	int count;
+	} pqueue_s;
+
+pitem *
+pitem_new(PQ_64BIT priority, void *data)
+	{
+	pitem *item = (pitem *) OPENSSL_malloc(sizeof(pitem));
+	if (item == NULL) return NULL;
+
+	pq_64bit_init(&(item->priority));
+	pq_64bit_assign(&item->priority, &priority);
+
+	item->data = data;
+	item->next = NULL;
+
+	return item;
+	}
+
+void
+pitem_free(pitem *item)
+	{
+	if (item == NULL) return;
+
+	pq_64bit_free(&(item->priority));
+	OPENSSL_free(item);
+	}
+
+pqueue_s *
+pqueue_new()
+	{
+	pqueue_s *pq = (pqueue_s *) OPENSSL_malloc(sizeof(pqueue_s));
+	if (pq == NULL) return NULL;
+
+	memset(pq, 0x00, sizeof(pqueue_s));
+	return pq;
+	}
+
+void
+pqueue_free(pqueue_s *pq)
+	{
+	if (pq == NULL) return;
+
+	OPENSSL_free(pq);
+	}
+
+pitem *
+pqueue_insert(pqueue_s *pq, pitem *item)
+	{
+	pitem *curr, *next;
+
+	if (pq->items == NULL)
+		{
+		pq->items = item;
+		return item;
+		}
+
+	for(curr = NULL, next = pq->items; 
+		next != NULL;
+		curr = next, next = next->next)
+		{
+		if (pq_64bit_gt(&(next->priority), &(item->priority)))
+			{
+			item->next = next;
+
+			if (curr == NULL) 
+				pq->items = item;
+			else  
+				curr->next = item;
+
+			return item;
+			}
+		/* duplicates not allowed */
+		if (pq_64bit_eq(&(item->priority), &(next->priority)))
+			return NULL;
+		}
+
+	item->next = NULL;
+	curr->next = item;
+
+	return item;
+	}
+
+pitem *
+pqueue_peek(pqueue_s *pq)
+	{
+	return pq->items;
+	}
+
+pitem *
+pqueue_pop(pqueue_s *pq)
+	{
+	pitem *item = pq->items;
+
+	if (pq->items != NULL)
+		pq->items = pq->items->next;
+
+	return item;
+	}
+
+pitem *
+pqueue_find(pqueue_s *pq, PQ_64BIT priority)
+	{
+	pitem *next, *prev = NULL;
+	pitem *found = NULL;
+
+	if ( pq->items == NULL)
+		return NULL;
+
+	for ( next = pq->items; next->next != NULL; 
+		  prev = next, next = next->next)
+		{
+		if ( pq_64bit_eq(&(next->priority), &priority))
+			{
+			found = next;
+			break;
+			}
+		}
+	
+	/* check the one last node */
+	if ( pq_64bit_eq(&(next->priority), &priority))
+		found = next;
+
+	if ( ! found)
+		return NULL;
+
+#if 0 /* find works in peek mode */
+	if ( prev == NULL)
+		pq->items = next->next;
+	else
+		prev->next = next->next;
+#endif
+
+	return found;
+	}
+
+#if PQ_64BIT_IS_INTEGER
+void
+pqueue_print(pqueue_s *pq)
+	{
+	pitem *item = pq->items;
+
+	while(item != NULL)
+		{
+		printf("item\t" PQ_64BIT_PRINT "\n", item->priority);
+		item = item->next;
+		}
+	}
+#endif
+
+pitem *
+pqueue_iterator(pqueue_s *pq)
+	{
+	return pqueue_peek(pq);
+	}
+
+pitem *
+pqueue_next(pitem **item)
+	{
+	pitem *ret;
+
+	if ( item == NULL || *item == NULL)
+		return NULL;
+
+
+	/* *item != NULL */
+	ret = *item;
+	*item = (*item)->next;
+
+	return ret;
+	}
diff --git a/crypto/openssl/crypto/pqueue/pqueue.h b/crypto/openssl/crypto/pqueue/pqueue.h
new file mode 100644
index 0000000..02386d1
--- /dev/null
+++ b/crypto/openssl/crypto/pqueue/pqueue.h
@@ -0,0 +1,95 @@
+/* crypto/pqueue/pqueue.h */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 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
+ *    openssl-core@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).
+ *
+ */
+
+#ifndef HEADER_PQUEUE_H
+#define HEADER_PQUEUE_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/pq_compat.h>
+
+typedef struct _pqueue *pqueue;
+
+typedef struct _pitem
+	{
+	PQ_64BIT priority;
+	void *data;
+	struct _pitem *next;
+	} pitem;
+
+typedef struct _pitem *piterator;
+
+pitem *pitem_new(PQ_64BIT priority, void *data);
+void   pitem_free(pitem *item);
+
+pqueue pqueue_new(void);
+void   pqueue_free(pqueue pq);
+
+pitem *pqueue_insert(pqueue pq, pitem *item);
+pitem *pqueue_peek(pqueue pq);
+pitem *pqueue_pop(pqueue pq);
+pitem *pqueue_find(pqueue pq, PQ_64BIT priority);
+pitem *pqueue_iterator(pqueue pq);
+pitem *pqueue_next(piterator *iter);
+
+void   pqueue_print(pqueue pq);
+
+#endif /* ! HEADER_PQUEUE_H */