105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
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* Copyright (c) 1995 Colin Plumb. All rights reserved.
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* For licensing and other legal details, see the file legal.c.
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*
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* bn.c - the high-level bignum interface
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*/
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#include "bn.h"
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/* Functions */
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void
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bnBegin(struct BigNum *bn)
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{
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static int bninit = 0;
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if (!bninit) {
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bnInit();
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bninit = 1;
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}
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bn->ptr = 0;
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bn->size = 0;
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bn->allocated = 0;
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}
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void
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bnSwap(struct BigNum *a, struct BigNum *b)
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{
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void *p;
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unsigned t;
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p = a->ptr;
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a->ptr = b->ptr;
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b->ptr = p;
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t = a->size;
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a->size = b->size;
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b->size = t;
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t = a->allocated;
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a->allocated = b->allocated;
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b->allocated = t;
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}
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int (*bnYield)(void);
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void (*bnEnd)(struct BigNum *bn);
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int (*bnPrealloc)(struct BigNum *bn, unsigned bits);
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int (*bnCopy)(struct BigNum *dest, struct BigNum const *src);
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void (*bnNorm)(struct BigNum *bn);
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void (*bnExtractBigBytes)(struct BigNum const *bn, unsigned char *dest,
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unsigned lsbyte, unsigned len);
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int (*bnInsertBigBytes)(struct BigNum *bn, unsigned char const *src,
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unsigned lsbyte, unsigned len);
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void (*bnExtractLittleBytes)(struct BigNum const *bn, unsigned char *dest,
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unsigned lsbyte, unsigned len);
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int (*bnInsertLittleBytes)(struct BigNum *bn, unsigned char const *src,
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unsigned lsbyte, unsigned len);
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unsigned (*bnLSWord)(struct BigNum const *src);
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int (*bnReadBit)(struct BigNum const *bn, unsigned bit);
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unsigned (*bnBits)(struct BigNum const *src);
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int (*bnAdd)(struct BigNum *dest, struct BigNum const *src);
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int (*bnSub)(struct BigNum *dest, struct BigNum const *src);
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int (*bnCmpQ)(struct BigNum const *a, unsigned b);
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int (*bnSetQ)(struct BigNum *dest, unsigned src);
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int (*bnAddQ)(struct BigNum *dest, unsigned src);
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int (*bnSubQ)(struct BigNum *dest, unsigned src);
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int (*bnCmp)(struct BigNum const *a, struct BigNum const *b);
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int (*bnSquare)(struct BigNum *dest, struct BigNum const *src);
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int (*bnMul)(struct BigNum *dest, struct BigNum const *a,
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struct BigNum const *b);
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int (*bnMulQ)(struct BigNum *dest, struct BigNum const *a, unsigned b);
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int (*bnDivMod)(struct BigNum *q, struct BigNum *r, struct BigNum const *n,
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struct BigNum const *d);
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int (*bnMod)(struct BigNum *dest, struct BigNum const *src,
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struct BigNum const *d);
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unsigned (*bnModQ)(struct BigNum const *src, unsigned d);
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int (*bnExpMod)(struct BigNum *result, struct BigNum const *n,
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struct BigNum const *exp, struct BigNum const *mod);
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int (*bnDoubleExpMod)(struct BigNum *dest,
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struct BigNum const *n1, struct BigNum const *e1,
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struct BigNum const *n2, struct BigNum const *e2,
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struct BigNum const *mod);
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int (*bnTwoExpMod)(struct BigNum *n, struct BigNum const *exp,
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struct BigNum const *mod);
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int (*bnGcd)(struct BigNum *dest, struct BigNum const *a,
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struct BigNum const *b);
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int (*bnInv)(struct BigNum *dest, struct BigNum const *src,
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struct BigNum const *mod);
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int (*bnLShift)(struct BigNum *dest, unsigned amt);
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void (*bnRShift)(struct BigNum *dest, unsigned amt);
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unsigned (*bnMakeOdd)(struct BigNum *n);
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int (*bnBasePrecompBegin)(struct BnBasePrecomp *pre, struct BigNum const *base,
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struct BigNum const *mod, unsigned maxebits);
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int (*bnBasePrecompCopy)(struct BnBasePrecomp *dst,
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struct BnBasePrecomp const *src);
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void (*bnBasePrecompEnd)(struct BnBasePrecomp *pre);
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int (*bnBasePrecompExpMod)(struct BigNum *dest,
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struct BnBasePrecomp const *pre, struct BigNum const *exp,
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struct BigNum const *mod);
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int (*bnDoubleBasePrecompExpMod)(struct BigNum *dest,
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struct BnBasePrecomp const *pre1, struct BigNum const *exp1,
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struct BnBasePrecomp const *pre2, struct BigNum const *exp2,
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struct BigNum const *mod);
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