diff options
Diffstat (limited to 'crypto/bn/bn_recp.c')
| -rw-r--r-- | crypto/bn/bn_recp.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/crypto/bn/bn_recp.c b/crypto/bn/bn_recp.c index d019941d6b..a175e1c5f2 100644 --- a/crypto/bn/bn_recp.c +++ b/crypto/bn/bn_recp.c @@ -100,11 +100,12 @@ int BN_RECP_CTX_set(BN_RECP_CTX *recp, const BIGNUM *d, BN_CTX *ctx) return(1); } -int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *x, BIGNUM *y, BN_RECP_CTX *recp, - BN_CTX *ctx) +int BN_mod_mul_reciprocal(BIGNUM *r, const BIGNUM *x, const BIGNUM *y, + BN_RECP_CTX *recp, BN_CTX *ctx) { int ret=0; BIGNUM *a; + const BIGNUM *ca; BN_CTX_start(ctx); if ((a = BN_CTX_get(ctx)) == NULL) goto err; @@ -114,19 +115,20 @@ int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *x, BIGNUM *y, BN_RECP_CTX *recp, { if (!BN_sqr(a,x,ctx)) goto err; } else { if (!BN_mul(a,x,y,ctx)) goto err; } + ca = a; } else - a=x; /* Just do the mod */ + ca=x; /* Just do the mod */ - BN_div_recp(NULL,r,a,recp,ctx); + BN_div_recp(NULL,r,ca,recp,ctx); ret=1; err: BN_CTX_end(ctx); return(ret); } -int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *m, BN_RECP_CTX *recp, - BN_CTX *ctx) +int BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, + BN_RECP_CTX *recp, BN_CTX *ctx) { int i,j,ret=0; BIGNUM *a,*b,*d,*r; @@ -201,7 +203,7 @@ err: * We actually calculate with an extra word of precision, so * we can do faster division if the remainder is not required. */ -int BN_reciprocal(BIGNUM *r, BIGNUM *m, int len, BN_CTX *ctx) +int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx) { int ret= -1; BIGNUM t; |