diff options
Diffstat (limited to 'lib/libssl/src/crypto/dh/dh_check.c')
| -rw-r--r-- | lib/libssl/src/crypto/dh/dh_check.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/libssl/src/crypto/dh/dh_check.c b/lib/libssl/src/crypto/dh/dh_check.c index a7e9920efb0..17debff62de 100644 --- a/lib/libssl/src/crypto/dh/dh_check.c +++ b/lib/libssl/src/crypto/dh/dh_check.c @@ -121,4 +121,26 @@ err: return(ok); } +int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) + { + int ok=0; + BIGNUM *q=NULL; + + *ret=0; + q=BN_new(); + if (q == NULL) goto err; + BN_set_word(q,1); + if (BN_cmp(pub_key,q) <= 0) + *ret|=DH_CHECK_PUBKEY_TOO_SMALL; + BN_copy(q,dh->p); + BN_sub_word(q,1); + if (BN_cmp(pub_key,q) >= 0) + *ret|=DH_CHECK_PUBKEY_TOO_LARGE; + + ok = 1; +err: + if (q != NULL) BN_free(q); + return(ok); + } + #endif |