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Change the number of Miller-Rabin test for DSA generation to 64

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This changes the security level from 100 to 128 bit.
We only have 1 define, this sets it to the highest level supported for
DSA, and needed for keys larger than 3072 bit.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
GH: #6075
This commit is contained in:
Kurt Roeckx 2018-04-25 21:47:20 +02:00
parent 7c226dfc43
commit 74ee379651
2 changed files with 8 additions and 3 deletions
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3
CHANGES
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@ -9,6 +9,9 @@
Changes between 1.1.0h and 1.1.1 [xx XXX xxxx]
*) Increase the number of Miller-Rabin rounds for DSA key generating to 64.
[Kurt Roeckx]
*) The 'tsget' script is renamed to 'tsget.pl', to avoid confusion when
moving between systems, and to avoid confusion when a Windows build is
done with mingw vs with MSVC. For POSIX installs, there's still a

8
include/openssl/dsa.h
View file

@ -141,10 +141,12 @@ int DSAparams_print_fp(FILE *fp, const DSA *x);
int DSA_print_fp(FILE *bp, const DSA *x, int off);
# endif
# define DSS_prime_checks 50
# define DSS_prime_checks 64
/*
* Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
* Rabin-Miller
* Primality test according to FIPS PUB 186-4, Appendix C.3. Since we only
* have one value here we set the number of checks to 64 which is the 128 bit
* security level that is the highest level and valid for creating a 3072 bit
* DSA key.
*/
# define DSA_is_prime(n, callback, cb_arg) \
BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)