"Overload" SunOS 4.x memcmp, which ruins ASN1_OBJECT table lookups.

PR: 1196
Submitted by: Russel Ruby

crypto/asn1/tasn_enc.c

@@ -59,6 +59,7 @@
 
 #include <stddef.h>
 #include <string.h>
+#include "cryptlib.h"
 #include <openssl/asn1.h>
 #include <openssl/asn1t.h>
 #include <openssl/objects.h>

crypto/o_str.c

@@ -94,3 +94,12 @@ int OPENSSL_strcasecmp(const char *str1, const char *str2)
 #endif
 	}
 
+int OPENSSL_memcmp(const void *v1,const void *v2,size_t n)
+	{
+	const unsigned char *c1=v1,*c2=v2;
+	int ret=0;
+
+	while(n && (ret=*c1-*c2)==0) n--,c1++,c2++;
+
+	return ret;
+	}

crypto/o_str.h

@@ -63,5 +63,6 @@
 
 int OPENSSL_strcasecmp(const char *str1, const char *str2);
 int OPENSSL_strncasecmp(const char *str1, const char *str2, size_t n);
+int OPENSSL_memcmp(const void *p1,const void *p2,size_t n);
 
 #endif

e_os.h

@@ -565,6 +565,9 @@ extern HINSTANCE _hInstance;
 extern char *sys_errlist[]; extern int sys_nerr;
 # define strerror(errnum) \
 	(((errnum)<0 || (errnum)>=sys_nerr) ? NULL : sys_errlist[errnum])
+  /* Being signed SunOS 4.x memcpy breaks ASN1_OBJECT table lookup */
+#include "o_str.h"
+# define memcmp OPENSSL_memcmp
 #endif
 
 #ifndef OPENSSL_EXIT