diff options
Diffstat (limited to 'lib/libcrypto/dsa/dsa_ossl.c')
| -rw-r--r-- | lib/libcrypto/dsa/dsa_ossl.c | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/lib/libcrypto/dsa/dsa_ossl.c b/lib/libcrypto/dsa/dsa_ossl.c index 4fead07e80f..a3ddd7d2816 100644 --- a/lib/libcrypto/dsa/dsa_ossl.c +++ b/lib/libcrypto/dsa/dsa_ossl.c @@ -148,15 +148,6 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) s=BN_new(); if (s == NULL) goto err; - - /* reject a excessive digest length (currently at most - * dsa-with-SHA256 is supported) */ - if (dlen > SHA256_DIGEST_LENGTH) - { - reason=DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE; - goto err; - } - ctx=BN_CTX_new(); if (ctx == NULL) goto err; @@ -185,7 +176,7 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) if (!BN_mod_mul(&xr,dsa->priv_key,r,dsa->q,ctx)) goto err;/* s = xr */ if (!BN_add(s, &xr, &m)) goto err; /* s = m + xr */ if (BN_cmp(s,dsa->q) > 0) - BN_sub(s,s,dsa->q); + if (!BN_sub(s,s,dsa->q)) goto err; if (!BN_mod_mul(s,s,kinv,dsa->q,ctx)) goto err; ret=DSA_SIG_new(); @@ -325,15 +316,6 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig, DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MODULUS_TOO_LARGE); return -1; } - - /* reject a excessive digest length (currently at most - * dsa-with-SHA256 is supported) */ - if (dgst_len > SHA256_DIGEST_LENGTH) - { - DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); - return -1; - } - BN_init(&u1); BN_init(&u2); BN_init(&t1); |