| author | Michael Krelin <hacker@klever.net> | 2007-06-18 22:02:02 (UTC) |
|---|---|---|
| committer | Michael Krelin <hacker@klever.net> | 2007-06-18 22:02:02 (UTC) |
| commit | 9af3fae2d53a34003af405b68923061c01584bc6 (patch) (side-by-side diff) | |
| tree | dd63e5bc3515c47ab074c564c51879b7c9652ab2 /lib/consumer.cc | |
| parent | 3b404dd029a2aba05efc2edadcc7f67c59746cf7 (diff) | |
| download | libopkele-9af3fae2d53a34003af405b68923061c01584bc6.zip libopkele-9af3fae2d53a34003af405b68923061c01584bc6.tar.gz libopkele-9af3fae2d53a34003af405b68923061c01584bc6.tar.bz2 | |
reworked zero-padding machinery and added one more instance of zero-padding
| -rw-r--r-- | lib/consumer.cc | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/consumer.cc b/lib/consumer.cc index 12866f0..282f0cc 100644 --- a/lib/consumer.cc +++ b/lib/consumer.cc @@ -99,15 +99,16 @@ namespace opkele { secret.from_base64(p.get_param("mac_key")); }else{ util::bignum_t s_pub = util::base64_to_bignum(p.get_param("dh_server_public")); - vector<unsigned char> ck(DH_size(dh)); - int cklen = DH_compute_key(&(ck.front()),s_pub,dh); + vector<unsigned char> ck(DH_size(dh)+1); + unsigned char *ckptr = &(ck.front())+1; + int cklen = DH_compute_key(ckptr,s_pub,dh); if(cklen<0) throw exception_openssl(OPKELE_CP_ "failed to DH_compute_key()"); - ck.resize(cklen); - // OpenID algorithm requires extra zero in case of set bit here - if(ck[0]&0x80) ck.insert(ck.begin(),1,0); + if(cklen && (*ckptr)&0x80) { + (*(--ckptr)) = 0; ++cklen; + } unsigned char key_sha1[SHA_DIGEST_LENGTH]; - SHA1(&(ck.front()),ck.size(),key_sha1); + SHA1(ckptr,cklen,key_sha1); secret.enxor_from_base64(key_sha1,p.get_param("enc_mac_key")); } int expires_in = 0; |