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Don't set the two top bits to one when generating a random number < q.:wq

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This commit is contained in:
Ulf Möller 2000-09-13 01:45:54 +00:00
parent 4041156461
commit c11dead17c
2 changed files with 2 additions and 2 deletions
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2
crypto/dsa/dsa_key.c
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@ -84,7 +84,7 @@ int DSA_generate_key(DSA *dsa)
i=BN_num_bits(dsa->q); i=BN_num_bits(dsa->q);
for (;;) for (;;)
{ {
if (!BN_rand(priv_key,i,1,0)) if (!BN_rand(priv_key,i,0,0))
goto err; goto err;
if (BN_cmp(priv_key,dsa->q) >= 0) if (BN_cmp(priv_key,dsa->q) >= 0)
BN_sub(priv_key,priv_key,dsa->q); BN_sub(priv_key,priv_key,dsa->q);

2
crypto/dsa/dsa_ossl.c
View File

@ -181,7 +181,7 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
/* Get random k */ /* Get random k */
for (;;) for (;;)
{ {
if (!BN_rand(&k, BN_num_bits(dsa->q), 1, 0)) goto err; if (!BN_rand(&k, BN_num_bits(dsa->q), 0, 0)) goto err;
if (BN_cmp(&k,dsa->q) >= 0) if (BN_cmp(&k,dsa->q) >= 0)
BN_sub(&k,&k,dsa->q); BN_sub(&k,&k,dsa->q);
if (!BN_is_zero(&k)) break; if (!BN_is_zero(&k)) break;