The consequence of constification is that to pass the address to a

pointer to a const double pointe parameter, the pointer must point to
const data as well.

apps/rsa.c

@@ -265,7 +265,7 @@ bad:
 	else if (informat == FORMAT_NETSCAPE)
 		{
 		BUF_MEM *buf=NULL;
-		unsigned char *p;
+		const unsigned char *p;
 		int size=0;
 
 		buf=BUF_MEM_new();

apps/speed.c

@@ -739,7 +739,7 @@ int MAIN(int argc, char **argv)
 #ifndef NO_RSA
 	for (i=0; i<RSA_NUM; i++)
 		{
-		unsigned char *p;
+		const unsigned char *p;
 
 		p=rsa_data[i];
 		rsa_key[i]=d2i_RSAPrivateKey(NULL,&p,rsa_data_length[i]);

ssl/ssl_rsa.c

@@ -303,7 +303,7 @@ end:
 int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, unsigned char *d, long len)
 	{
 	int ret;
-	unsigned char *p;
+	const unsigned char *p;
 	RSA *rsa;
 
 	p=d;
@@ -641,7 +641,7 @@ end:
 int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, unsigned char *d, long len)
 	{
 	int ret;
-	unsigned char *p;
+	const unsigned char *p;
 	RSA *rsa;
 
 	p=d;