Index: ext/openssl/ossl_x509attr.c
===================================================================
--- ext/openssl/ossl_x509attr.c	(revision 26837)
+++ ext/openssl/ossl_x509attr.c	(revision 26838)
@@ -218,8 +218,9 @@
 	ossl_str_adjust(str, p);
     }
     else{
-	length = i2d_ASN1_SET_OF_ASN1_TYPE(attr->value.set, NULL,
-			i2d_ASN1_TYPE, V_ASN1_SET, V_ASN1_UNIVERSAL, 0);
+	length = i2d_ASN1_SET_OF_ASN1_TYPE(attr->value.set,
+			(unsigned char **) NULL, i2d_ASN1_TYPE,
+			V_ASN1_SET, V_ASN1_UNIVERSAL, 0);
 	str = rb_str_new(0, length);
 	p = (unsigned char *)RSTRING_PTR(str);
 	i2d_ASN1_SET_OF_ASN1_TYPE(attr->value.set, &p,
Index: ext/openssl/ossl_ssl.c
===================================================================
--- ext/openssl/ossl_ssl.c	(revision 26837)
+++ ext/openssl/ossl_ssl.c	(revision 26838)
@@ -1291,10 +1291,10 @@
     }
     chain = SSL_get_peer_cert_chain(ssl);
     if(!chain) return Qnil;
-    num = sk_num(chain);
+    num = sk_X509_num(chain);
     ary = rb_ary_new2(num);
     for (i = 0; i < num; i++){
-	cert = (X509*)sk_value(chain, i);
+	cert = sk_X509_value(chain, i);
 	rb_ary_push(ary, ossl_x509_new(cert));
     }
 
Index: ext/openssl/ossl.c
===================================================================
--- ext/openssl/ossl.c	(revision 26837)
+++ ext/openssl/ossl.c	(revision 26838)
@@ -92,7 +92,7 @@
 
 #define OSSL_IMPL_SK2ARY(name, type)	        \
 VALUE						\
-ossl_##name##_sk2ary(STACK *sk)			\
+ossl_##name##_sk2ary(STACK_OF(type) *sk)	\
 {						\
     type *t;					\
     int i, num;					\
@@ -102,7 +102,7 @@
 	OSSL_Debug("empty sk!");		\
 	return Qnil;				\
     }						\
-    num = sk_num(sk);				\
+    num = sk_##type##_num(sk);			\
     if (num < 0) {				\
 	OSSL_Debug("items in sk < -1???");	\
 	return rb_ary_new();			\
@@ -110,7 +110,7 @@
     ary = rb_ary_new2(num);			\
 						\
     for (i=0; i<num; i++) {			\
-	t = (type *)sk_value(sk, i);		\
+	t = sk_##type##_value(sk, i);		\
 	rb_ary_push(ary, ossl_##name##_new(t));	\
     }						\
     return ary;					\
Index: ext/openssl/ossl.h
===================================================================
--- ext/openssl/ossl.h	(revision 26837)
+++ ext/openssl/ossl.h	(revision 26838)
@@ -108,6 +108,13 @@
 } while (0)
 
 /*
+ * Compatibility
+ */
+#if OPENSSL_VERSION_NUMBER >= 0x10000000L
+#define STACK _STACK
+#endif
+
+/*
  * String to HEXString conversion
  */
 int string2hex(const unsigned char *, int, char **, int *);
Index: ext/openssl/ossl_x509crl.c
===================================================================
--- ext/openssl/ossl_x509crl.c	(revision 26837)
+++ ext/openssl/ossl_x509crl.c	(revision 26838)
@@ -264,7 +264,7 @@
     VALUE ary, revoked;
 
     GetX509CRL(self, crl);
-    num = sk_X509_CRL_num(X509_CRL_get_REVOKED(crl));
+    num = sk_X509_REVOKED_num(X509_CRL_get_REVOKED(crl));
     if (num < 0) {
 	OSSL_Debug("num < 0???");
 	return rb_ary_new();
@@ -272,7 +272,7 @@
     ary = rb_ary_new2(num);
     for(i=0; i<num; i++) {
 	/* NO DUP - don't free! */
-	rev = (X509_REVOKED *)sk_X509_CRL_value(X509_CRL_get_REVOKED(crl), i);
+	rev = sk_X509_REVOKED_value(X509_CRL_get_REVOKED(crl), i);
 	revoked = ossl_x509revoked_new(rev);
 	rb_ary_push(ary, revoked);
     }
Index: ext/openssl/ossl_pkcs7.c
===================================================================
--- ext/openssl/ossl_pkcs7.c	(revision 26837)
+++ ext/openssl/ossl_pkcs7.c	(revision 26838)
@@ -572,11 +572,33 @@
     return self;
 }
 
-static STACK *
-pkcs7_get_certs_or_crls(VALUE self, int want_certs)
+static STACK_OF(X509) *
+pkcs7_get_certs(VALUE self)
 {
     PKCS7 *pkcs7;
     STACK_OF(X509) *certs;
+    int i;
+
+    GetPKCS7(self, pkcs7);
+    i = OBJ_obj2nid(pkcs7->type);
+    switch(i){
+    case NID_pkcs7_signed:
+        certs = pkcs7->d.sign->cert;
+        break;
+    case NID_pkcs7_signedAndEnveloped:
+        certs = pkcs7->d.signed_and_enveloped->cert;
+        break;
+    default:
+        certs = NULL;
+    }
+
+    return certs;
+}
+
+static STACK_OF(X509_CRL) *
+pkcs7_get_crls(VALUE self)
+{
+    PKCS7 *pkcs7;
     STACK_OF(X509_CRL) *crls;
     int i;
 
@@ -584,18 +606,16 @@
     i = OBJ_obj2nid(pkcs7->type);
     switch(i){
     case NID_pkcs7_signed:
-        certs = pkcs7->d.sign->cert;
         crls = pkcs7->d.sign->crl;
         break;
     case NID_pkcs7_signedAndEnveloped:
-        certs = pkcs7->d.signed_and_enveloped->cert;
         crls = pkcs7->d.signed_and_enveloped->crl;
         break;
     default:
-        certs = crls = NULL;
+        crls = NULL;
     }
 
-    return want_certs ? certs : crls;
+    return crls;
 }
 
 static VALUE
@@ -610,7 +630,7 @@
     STACK_OF(X509) *certs;
     X509 *cert;
 
-    certs = pkcs7_get_certs_or_crls(self, 1);
+    certs = pkcs7_get_certs(self);
     while((cert = sk_X509_pop(certs))) X509_free(cert);
     rb_block_call(ary, rb_intern("each"), 0, 0, ossl_pkcs7_set_certs_i, self);
 
@@ -620,7 +640,7 @@
 static VALUE
 ossl_pkcs7_get_certificates(VALUE self)
 {
-    return ossl_x509_sk2ary(pkcs7_get_certs_or_crls(self, 1));
+    return ossl_x509_sk2ary(pkcs7_get_certs(self));
 }
 
 static VALUE
@@ -650,7 +670,7 @@
     STACK_OF(X509_CRL) *crls;
     X509_CRL *crl;
 
-    crls = pkcs7_get_certs_or_crls(self, 0);
+    crls = pkcs7_get_crls(self);
     while((crl = sk_X509_CRL_pop(crls))) X509_CRL_free(crl);
     rb_block_call(ary, rb_intern("each"), 0, 0, ossl_pkcs7_set_crls_i, self);
 
@@ -660,7 +680,7 @@
 static VALUE
 ossl_pkcs7_get_crls(VALUE self)
 {
-    return ossl_x509crl_sk2ary(pkcs7_get_certs_or_crls(self, 0));
+    return ossl_x509crl_sk2ary(pkcs7_get_crls(self));
 }
 
 static VALUE