diff options
| author | Bernd Edlinger <bernd.edlinger@hotmail.de> | 2019-09-06 23:38:49 +0200 |
|---|---|---|
| committer | Bernd Edlinger <bernd.edlinger@hotmail.de> | 2019-09-09 14:43:57 +0200 |
| commit | feeb7ecd2f272e1c195e51cefc0d6b0199fef1d0 (patch) | |
| tree | 55d374b46d9a18051f2243f8944d20568c9cd490 /crypto/dh | |
| parent | bfed4fc8367b55e630c70cc038887ddf9b090dd6 (diff) | |
| download | openssl-feeb7ecd2f272e1c195e51cefc0d6b0199fef1d0.zip openssl-feeb7ecd2f272e1c195e51cefc0d6b0199fef1d0.tar.gz openssl-feeb7ecd2f272e1c195e51cefc0d6b0199fef1d0.tar.bz2 | |
Check the DH modulus bit length
The check was missing in DH_check and DH_check_params.
[extended tests]
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9796)
Diffstat (limited to 'crypto/dh')
| -rw-r--r-- | crypto/dh/dh_check.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c index aff7e37..373110d 100644 --- a/crypto/dh/dh_check.c +++ b/crypto/dh/dh_check.c @@ -31,6 +31,10 @@ int DH_check_params_ex(const DH *dh) DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_CHECK_P_NOT_PRIME); if ((errflags & DH_NOT_SUITABLE_GENERATOR) != 0) DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_NOT_SUITABLE_GENERATOR); + if ((errflags & DH_MODULUS_TOO_SMALL) != 0) + DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_MODULUS_TOO_SMALL); + if ((errflags & DH_MODULUS_TOO_LARGE) != 0) + DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_MODULUS_TOO_LARGE); return errflags == 0; } @@ -58,6 +62,10 @@ int DH_check_params(const DH *dh, int *ret) goto err; if (BN_cmp(dh->g, tmp) >= 0) *ret |= DH_NOT_SUITABLE_GENERATOR; + if (BN_num_bits(dh->p) < DH_MIN_MODULUS_BITS) + *ret |= DH_MODULUS_TOO_SMALL; + if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) + *ret |= DH_MODULUS_TOO_LARGE; ok = 1; err: @@ -91,6 +99,10 @@ int DH_check_ex(const DH *dh) DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_P_NOT_PRIME); if ((errflags & DH_CHECK_P_NOT_SAFE_PRIME) != 0) DHerr(DH_F_DH_CHECK_EX, DH_R_CHECK_P_NOT_SAFE_PRIME); + if ((errflags & DH_MODULUS_TOO_SMALL) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_MODULUS_TOO_SMALL); + if ((errflags & DH_MODULUS_TOO_LARGE) != 0) + DHerr(DH_F_DH_CHECK_EX, DH_R_MODULUS_TOO_LARGE); return errflags == 0; } |