More constification of the BN library.

7 files changed, 33 insertions, 29 deletions

diff --git a/crypto/bn/bn.h b/crypto/bn/bn.h
index b6e8b7c9a4..d54bd2dfba 100644
--- a/crypto/bn/bn.h
+++ b/crypto/bn/bn.h
@@ -336,7 +336,7 @@ void	BN_clear_free(BIGNUM *a);
 BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b);
 BIGNUM *BN_bin2bn(const unsigned char *s,int len,BIGNUM *ret);
 int	BN_bn2bin(const BIGNUM *a, unsigned char *to);
-BIGNUM *BN_mpi2bn(unsigned char *s,int len,BIGNUM *ret);
+BIGNUM *BN_mpi2bn(const unsigned char *s,int len,BIGNUM *ret);
 int	BN_bn2mpi(const BIGNUM *a, unsigned char *to);
 int	BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
 int	BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
@@ -394,7 +394,7 @@ char *	BN_bn2hex(const BIGNUM *a);
 char *	BN_bn2dec(const BIGNUM *a);
 int 	BN_hex2bn(BIGNUM **a, const char *str);
 int 	BN_dec2bn(BIGNUM **a, const char *str);
-int	BN_gcd(BIGNUM *r,BIGNUM *in_a,BIGNUM *in_b,BN_CTX *ctx);
+int	BN_gcd(BIGNUM *r,const BIGNUM *in_a,const BIGNUM *in_b,BN_CTX *ctx);
 BIGNUM *BN_mod_inverse(BIGNUM *ret,
 	const BIGNUM *a, const BIGNUM *n,BN_CTX *ctx);
 BIGNUM *BN_generate_prime(BIGNUM *ret,int bits,int safe,
@@ -412,7 +412,8 @@ BN_MONT_CTX *BN_MONT_CTX_new(void );
 void BN_MONT_CTX_init(BN_MONT_CTX *ctx);
 int BN_mod_mul_montgomery(BIGNUM *r,const BIGNUM *a,const BIGNUM *b,
 	BN_MONT_CTX *mont, BN_CTX *ctx);
-int BN_from_montgomery(BIGNUM *r,BIGNUM *a,BN_MONT_CTX *mont,BN_CTX *ctx);
+int BN_from_montgomery(BIGNUM *r,const BIGNUM *a,
+	BN_MONT_CTX *mont, BN_CTX *ctx);
 void BN_MONT_CTX_free(BN_MONT_CTX *mont);
 int BN_MONT_CTX_set(BN_MONT_CTX *mont,const BIGNUM *modulus,BN_CTX *ctx);
 BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to,BN_MONT_CTX *from);
@@ -455,15 +456,17 @@ BIGNUM *bn_dup_expand(const BIGNUM *a, int words);
 		} \
 	}
 
-BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w);
-BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w);
-void     bn_sqr_words(BN_ULONG *rp, BN_ULONG *ap, int num);
+BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
+BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w);
+void     bn_sqr_words(BN_ULONG *rp, const BN_ULONG *ap, int num);
 BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d);
-BN_ULONG bn_add_words(BN_ULONG *rp, BN_ULONG *ap, BN_ULONG *bp,int num);
-BN_ULONG bn_sub_words(BN_ULONG *rp, BN_ULONG *ap, BN_ULONG *bp,int num);
+BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
+BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
+BN_ULONG bn_add_part_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num, int delta);
+BN_ULONG bn_sub_part_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num, int delta);
 
 #ifdef BN_DEBUG
-  void bn_dump1(FILE *o, const char *a, BN_ULONG *b,int n);
+  void bn_dump1(FILE *o, const char *a, const BN_ULONG *b,int n);
 # define bn_print(a) {fprintf(stderr, #a "="); BN_print_fp(stderr,a); \
    fprintf(stderr,"\n");}
 # define bn_dump(a,n) bn_dump1(stderr,#a,a,n);
diff --git a/crypto/bn/bn_asm.c b/crypto/bn/bn_asm.c
index 44e52a40db..a5dc574fd8 100644
--- a/crypto/bn/bn_asm.c
+++ b/crypto/bn/bn_asm.c
@@ -68,7 +68,7 @@
 
 #if defined(BN_LLONG) || defined(BN_UMULT_HIGH)
 
-BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
+BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
 	{
 	BN_ULONG c1=0;
 
@@ -93,7 +93,7 @@ BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
 	return(c1);
 	} 
 
-BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
+BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
 	{
 	BN_ULONG c1=0;
 
@@ -117,7 +117,7 @@ BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
 	return(c1);
 	} 
 
-void bn_sqr_words(BN_ULONG *r, BN_ULONG *a, int n)
+void bn_sqr_words(BN_ULONG *r, const BN_ULONG *a, int n)
         {
 	assert(n >= 0);
 	if (n <= 0) return;
@@ -139,7 +139,7 @@ void bn_sqr_words(BN_ULONG *r, BN_ULONG *a, int n)
 
 #else /* !(defined(BN_LLONG) || defined(BN_UMULT_HIGH)) */
 
-BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
+BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
 	{
 	BN_ULONG c=0;
 	BN_ULONG bl,bh;
@@ -166,7 +166,7 @@ BN_ULONG bn_mul_add_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
 	return(c);
 	} 
 
-BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
+BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
 	{
 	BN_ULONG carry=0;
 	BN_ULONG bl,bh;
@@ -193,7 +193,7 @@ BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
 	return(carry);
 	} 
 
-void bn_sqr_words(BN_ULONG *r, BN_ULONG *a, int n)
+void bn_sqr_words(BN_ULONG *r, const BN_ULONG *a, int n)
         {
 	assert(n >= 0);
 	if (n <= 0) return;
@@ -332,7 +332,7 @@ BN_ULONG bn_add_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
 	return((BN_ULONG)ll);
 	}
 #else /* !BN_LLONG */
-BN_ULONG bn_add_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
+BN_ULONG bn_add_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b, int n)
         {
 	BN_ULONG c,l,t;
 
@@ -382,7 +382,7 @@ BN_ULONG bn_add_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
 	}
 #endif /* !BN_LLONG */
 
-BN_ULONG bn_sub_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
+BN_ULONG bn_sub_words(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b, int n)
         {
 	BN_ULONG t1,t2;
 	int c=0;
@@ -673,7 +673,7 @@ void bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
 	r[7]=c2;
 	}
 
-void bn_sqr_comba8(BN_ULONG *r, BN_ULONG *a)
+void bn_sqr_comba8(BN_ULONG *r, const BN_ULONG *a)
 	{
 #ifdef BN_LLONG
 	BN_ULLONG t,tt;
@@ -754,7 +754,7 @@ void bn_sqr_comba8(BN_ULONG *r, BN_ULONG *a)
 	r[15]=c1;
 	}
 
-void bn_sqr_comba4(BN_ULONG *r, BN_ULONG *a)
+void bn_sqr_comba4(BN_ULONG *r, const BN_ULONG *a)
 	{
 #ifdef BN_LLONG
 	BN_ULLONG t,tt;
diff --git a/crypto/bn/bn_gcd.c b/crypto/bn/bn_gcd.c
index 61c431fc7b..01fbd12359 100644
--- a/crypto/bn/bn_gcd.c
+++ b/crypto/bn/bn_gcd.c
@@ -62,7 +62,7 @@
 
 static BIGNUM *euclid(BIGNUM *a, BIGNUM *b);
 
-int BN_gcd(BIGNUM *r, BIGNUM *in_a, BIGNUM *in_b, BN_CTX *ctx)
+int BN_gcd(BIGNUM *r, const BIGNUM *in_a, const BIGNUM *in_b, BN_CTX *ctx)
 	{
 	BIGNUM *a,*b,*t;
 	int ret=0;
diff --git a/crypto/bn/bn_lcl.h b/crypto/bn/bn_lcl.h
index 9c959921b4..22c33971dd 100644
--- a/crypto/bn/bn_lcl.h
+++ b/crypto/bn/bn_lcl.h
@@ -398,14 +398,15 @@ extern "C" {
 void bn_mul_normal(BN_ULONG *r,BN_ULONG *a,int na,BN_ULONG *b,int nb);
 void bn_mul_comba8(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
 void bn_mul_comba4(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
-void bn_sqr_normal(BN_ULONG *r, BN_ULONG *a, int n, BN_ULONG *tmp);
-void bn_sqr_comba8(BN_ULONG *r,BN_ULONG *a);
-void bn_sqr_comba4(BN_ULONG *r,BN_ULONG *a);
-int bn_cmp_words(BN_ULONG *a,BN_ULONG *b,int n);
+void bn_sqr_normal(BN_ULONG *r, const BN_ULONG *a, int n, BN_ULONG *tmp);
+void bn_sqr_comba8(BN_ULONG *r,const BN_ULONG *a);
+void bn_sqr_comba4(BN_ULONG *r,const BN_ULONG *a);
+int bn_cmp_words(const BN_ULONG *a,const BN_ULONG *b,int n);
+int bn_cmp_part_words(const BN_ULONG *a,const BN_ULONG *b,int cl,int dl);
 void bn_mul_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2,BN_ULONG *t);
 void bn_mul_part_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,
 	int tn, int n,BN_ULONG *t);
-void bn_sqr_recursive(BN_ULONG *r,BN_ULONG *a, int n2, BN_ULONG *t);
+void bn_sqr_recursive(BN_ULONG *r,const BN_ULONG *a, int n2, BN_ULONG *t);
 void bn_mul_low_normal(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b, int n);
 void bn_mul_low_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2,
 	BN_ULONG *t);
diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c
index 0ad62652f6..130a9e2db4 100644
--- a/crypto/bn/bn_lib.c
+++ b/crypto/bn/bn_lib.c
@@ -792,7 +792,7 @@ int BN_mask_bits(BIGNUM *a, int n)
 	return(1);
 	}
 
-int bn_cmp_words(BN_ULONG *a, BN_ULONG *b, int n)
+int bn_cmp_words(const BN_ULONG *a, const BN_ULONG *b, int n)
 	{
 	int i;
 	BN_ULONG aa,bb;
diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index d9e4c01c90..7f8296c893 100644
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -96,7 +96,7 @@ err:
 	return(ret);
 	}
 
-int BN_from_montgomery(BIGNUM *ret, BIGNUM *a, BN_MONT_CTX *mont,
+int BN_from_montgomery(BIGNUM *ret, const BIGNUM *a, BN_MONT_CTX *mont,
 	     BN_CTX *ctx)
 	{
 	int retn=0;
@@ -141,7 +141,7 @@ int BN_from_montgomery(BIGNUM *ret, BIGNUM *a, BN_MONT_CTX *mont,
 	n0=mont->n0;
 
 #ifdef BN_COUNT
-	printf("word BN_from_montgomery %d * %d\n",nl,nl);
+	fprintf(stderr,"word BN_from_montgomery %d * %d\n",nl,nl);
 #endif
 	for (i=0; i<nl; i++)
 		{
diff --git a/crypto/bn/bn_mpi.c b/crypto/bn/bn_mpi.c
index 80e1dca6b7..05fa9d1e9a 100644
--- a/crypto/bn/bn_mpi.c
+++ b/crypto/bn/bn_mpi.c
@@ -88,7 +88,7 @@ int BN_bn2mpi(const BIGNUM *a, unsigned char *d)
 	return(num+4+ext);
 	}
 
-BIGNUM *BN_mpi2bn(unsigned char *d, int n, BIGNUM *a)
+BIGNUM *BN_mpi2bn(const unsigned char *d, int n, BIGNUM *a)
 	{
 	long len;
 	int neg=0;