X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fd0_blind_id.git;a=blobdiff_plain;f=d0_bignum-openssl.c;h=1e103a4c725c8ca75dcf67e052544cdfdb153dd4;hp=c8316906f6b9a0b2d9327cbf852221934b6d2819;hb=17862d3aa240f8e2203dad321db501e78dec016a;hpb=0d9c60c64a7628d79882fd8ceb8d3aafc3548688

diff --git a/d0_bignum-openssl.c b/d0_bignum-openssl.c
index c831690..1e103a4 100644
--- a/d0_bignum-openssl.c
+++ b/d0_bignum-openssl.c
@@ -46,6 +46,12 @@
 #include <string.h>
 #include <openssl/bn.h>
 
+// for stupid OpenSSL versions in Mac OS X
+#ifndef BN_is_negative
+#define BN_is_negative(a) ((a)->neg != 0)
+#define BN_set_negative(a,n) ((a)->neg = ((n) && !BN_is_zero(a)))
+#endif
+
 struct d0_bignum_s
 {
 	BIGNUM z;
@@ -57,7 +63,7 @@ static BN_CTX *ctx;
 #include <time.h>
 #include <stdio.h>
 
-WARN_UNUSED_RESULT BOOL d0_bignum_INITIALIZE(void)
+D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_INITIALIZE(void)
 {
 	ctx = BN_CTX_new();
 	d0_bignum_init(&temp);
@@ -71,7 +77,7 @@ void d0_bignum_SHUTDOWN(void)
 	ctx = NULL;
 }
 
-BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum)
+D0_BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum)
 {
 	static unsigned char numbuf[65536];
 	size_t count = 0;
@@ -287,6 +293,13 @@ d0_bignum_t *d0_bignum_mod_add(d0_bignum_t *r, const d0_bignum_t *a, const d0_bi
 	return r;
 }
 
+d0_bignum_t *d0_bignum_mod_sub(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m)
+{
+	if(!r) r = d0_bignum_new(); if(!r) return NULL;
+	BN_mod_sub(&r->z, &a->z, &b->z, &m->z, ctx);
+	return r;
+}
+
 d0_bignum_t *d0_bignum_mod_mul(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m)
 {
 	if(!r) r = d0_bignum_new(); if(!r) return NULL;
@@ -301,13 +314,13 @@ d0_bignum_t *d0_bignum_mod_pow(d0_bignum_t *r, const d0_bignum_t *a, const d0_bi
 	return r;
 }
 
-BOOL d0_bignum_mod_inv(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *m)
+D0_BOOL d0_bignum_mod_inv(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *m)
 {
 	// here, r MUST be set, as otherwise we cannot return error state!
 	return !!BN_mod_inverse(&r->z, &a->z, &m->z, ctx);
 }
 
-int d0_bignum_isprime(d0_bignum_t *r, int param)
+int d0_bignum_isprime(const d0_bignum_t *r, int param)
 {
 	if(param <= 0)
 		return BN_is_prime_fasttest(&r->z, 1, NULL, ctx, NULL, 1);