diff options
Diffstat (limited to 'crypto/openssl/crypto/dsa/dsa_ossl.c')
| -rw-r--r-- | crypto/openssl/crypto/dsa/dsa_ossl.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/crypto/openssl/crypto/dsa/dsa_ossl.c b/crypto/openssl/crypto/dsa/dsa_ossl.c index 4283572..cac42c3 100644 --- a/crypto/openssl/crypto/dsa/dsa_ossl.c +++ b/crypto/openssl/crypto/dsa/dsa_ossl.c @@ -105,6 +105,11 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) int i,reason=ERR_R_BN_LIB; DSA_SIG *ret=NULL; + if (!dsa->p || !dsa->q || !dsa->g) + { + reason=DSA_R_MISSING_PARAMETERS; + goto err; + } BN_init(&m); BN_init(&xr); s=BN_new(); @@ -167,6 +172,11 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp) BIGNUM k,*kinv=NULL,*r=NULL; int ret=0; + if (!dsa->p || !dsa->q || !dsa->g) + { + DSAerr(DSA_F_DSA_SIGN_SETUP,DSA_R_MISSING_PARAMETERS); + return 0; + } if (ctx_in == NULL) { if ((ctx=BN_CTX_new()) == NULL) goto err; @@ -230,6 +240,17 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig, BN_init(&u2); BN_init(&t1); + if (BN_is_zero(sig->r) || sig->r->neg || BN_ucmp(sig->r, dsa->q) >= 0) + { + ret = 0; + goto err; + } + if (BN_is_zero(sig->s) || sig->s->neg || BN_ucmp(sig->s, dsa->q) >= 0) + { + ret = 0; + goto err; + } + /* Calculate W = inv(S) mod Q * save W in u2 */ if ((BN_mod_inverse(&u2,sig->s,dsa->q,ctx)) == NULL) goto err; |
