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In FIPS mode only use "Generation by Testing Candidates" equivalent.

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This commit is contained in:
Dr. Stephen Henson 2011-02-11 15:19:54 +00:00
parent 16a7fcc447
commit ed12c2f7ca
1 changed files with 8 additions and 0 deletions
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8
crypto/bn/bn_rand.c
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@ -247,7 +247,15 @@ static int bn_rand_range(int pseudo, BIGNUM *r, const BIGNUM *range)
if (n == 1) if (n == 1)
BN_zero(r); BN_zero(r);
#ifdef OPENSSL_FIPS
/* FIPS 186-3 is picky about how random numbers for keys etc are
* generated. So we just use the second case which is equivalent to
* "Generation by Testing Candidates" mentioned in B.1.2 et al.
*/
else if (!FIPS_mode() && !BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3))
#else
else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3)) else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3))
#endif
{ {
/* range = 100..._2, /* range = 100..._2,
* so 3*range (= 11..._2) is exactly one bit longer than range */ * so 3*range (= 11..._2) is exactly one bit longer than range */