With the changes as mentioned, I get a core dump
at DSA_do_verify, reason being that
dsa_sig->s & dsa_sig->r are NULL.
??
static int
verify_dsa_msg(const EVP_MD_CTX *ctx,
const u_char *sigdata, int siglen,
EVP_PKEY *pubkey)
{
static EVP_MD_CTX tmp_ctx;
unsigned char dgst[EVP_MAX_MD_SIZE];
unsigned int dgst_len;
DSA_SIG *dsa_sig;
int rc;
EVP_MD_CTX_init(&tmp_ctx);
EVP_MD_CTX_copy_ex(&tmp_ctx,ctx);
EVP_DigestFinal_ex(&tmp_ctx,&(dgst[0]),&dgst_len);
EVP_MD_CTX_cleanup(&tmp_ctx);
if (siglen != 40) return -1;
dsa_sig = DSA_SIG_new();
if (dsa_sig == NULL) return -1;
//if (d2i_DSA_SIG(&dsa_sig,&sigbuf,siglen) == NULL)
//goto err;
BN_bin2bn(sigdata, 20, dsa_sig->r);
BN_bin2bn(sigdata + 20, 20, dsa_sig->s);
rc=DSA_do_verify(dgst,dgst_len,dsa_sig,
pubkey->pkey.ptr);
DSA_SIG_free(dsa_sig);
return rc;
}
--- Nils Larsch <[EMAIL PROTECTED]> wrote:
> rai mahua wrote:
> ...
> > So if I take a look at DSA_verify, should I
> replace
> > the call to d2i_DSA_SIG with the 2 calls to
> BN_bin2bn.
>
> yes
>
> Nils
>
>
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