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Fix bn_cmp_part_words() and move it to bn_lib.c.

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This commit is contained in:
Ulf Möller 2000-12-02 07:28:43 +00:00
parent 0826c85f4c
commit 52a1bab2d9
3 changed files with 29 additions and 13 deletions
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2
crypto/bn/bn_lcl.h
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@ -402,6 +402,8 @@ 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);

25
crypto/bn/bn_lib.c
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@ -777,3 +777,28 @@ int bn_cmp_words(const BN_ULONG *a, const BN_ULONG *b, int n)
}
return(0);
}
int bn_cmp_part_words(const BN_ULONG *a, const BN_ULONG *b,
int cl, int dl)
{
int n,i;
n = cl-1;
if (dl < 0)
{
for (i=-dl; i>0; i++)
{
if (b[n+i] != 0)
return -1; /* a < b */
}
}
if (dl > 0)
{
for (i=dl; i>0; i--)
{
if (a[n+i] != 0)
return 1; /* a > b */
}
}
return bn_cmp_words(a,b,cl);
}

15
crypto/bn/bn_mul.c
View File

@ -61,8 +61,8 @@
#include "cryptlib.h"
#include "bn_lcl.h"
/* Here follows specialised variants of bn_cmp_words(), bn_add_words() and
bn_sub_words(). They all have the property performing operations on
/* Here follows specialised variants of bn_add_words() and
bn_sub_words(). They have the property performing operations on
arrays of different sizes. The sizes of those arrays is expressed through
cl, which is the common length ( basicall, min(len(a),len(b)) ), and dl,
which is the delta between the two lengths, calculated as len(a)-len(b).
@ -71,17 +71,6 @@
These functions should probably end up in bn_asm.c as soon as there are
assembler counterparts for the systems that use assembler files. */
int bn_cmp_part_words(const BN_ULONG *a, const BN_ULONG *b,
int cl, int dl)
{
if (dl < 0) /* a < b */
return -1;
if (dl > 0) /* a > b */
return 1;
return bn_cmp_words(a,b,cl);
}
BN_ULONG bn_sub_part_words(BN_ULONG *r,
const BN_ULONG *a, const BN_ULONG *b,
int cl, int dl)