Edward Chan wrote:
What am I doing wrong here? I generate an RSA key. Then I DER encode
it. Then try to decode it, but the decode fails. The error says,
"error:0D07207B:asn1 encoding routines:ASN1_get_object:header too long"
RSA* rsa = RSA_generate_key(2048, RSA_F4, 0, 0);
if (rsa)
{
if (RSA_check_key(rsa) > 0)
{
int len = i2d_RSAPublicKey(rsa, 0);
U8* buf = new U8[len];
memset(buf, 0, len);
i2d_RSAPublicKey(rsa, &buf);
// everything looks good up to here; I can see buf gets
filled with len number of bytes
// but then I try to get the public key back by doing
the following, and it fails.
RSA* public_key = d2i_RSAPublicKey(0, (const U8**)&buf,
len); // public_key is NULL; why???
if (!public_key)
{
char err[1024];
ERR_error_string(ERR_get_error(), err);
fprintf(stderr, "Error : %s\n", err);
}
}
}
please read the FAQ
Nils
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