/* * CMS Decoding * (C) 1999-2007 Jack Lloyd * * Distributed under the terms of the Botan license */ #include #include #include #include #include namespace Botan { /* * CMS_Decoder Constructor */ CMS_Decoder::CMS_Decoder(DataSource& in, const X509_Store& x509store, User_Interface& ui_ref, PKCS8_PrivateKey* key) : ui(ui_ref), store(x509store) { status = GOOD; add_key(key); if(ASN1::maybe_BER(in) && !PEM_Code::matches(in)) initial_read(in); else { DataSource_Memory ber(PEM_Code::decode_check_label(in, "PKCS7")); initial_read(ber); } } /* * Read the outermost ContentInfo */ void CMS_Decoder::initial_read(DataSource&) { // FIXME... /* BER_Decoder decoder(in); BER_Decoder content_info = decoder.start_cons(SEQUENCE); content_info.decode(next_type); BER_Decoder content_type = BER::get_subsequence(content_info, ASN1_Tag(0)); data = content_type.get_remaining(); */ decode_layer(); } /* * Add another private key to use */ void CMS_Decoder::add_key(PKCS8_PrivateKey* key) { if(!key) return; #if 0 for(u32bit j = 0; j != keys.size(); j++) if(keys[j]->key_id() == key->key_id()) return; #endif keys.push_back(key); } /* * Return the status information */ CMS_Decoder::Status CMS_Decoder::layer_status() const { return status; } /* * Return the final data content */ std::string CMS_Decoder::get_data() const { if(layer_type() != DATA) throw Invalid_State("CMS: Cannot retrieve data from non-DATA layer"); return std::string((const char*)data.begin(), data.size()); } /* * Return the content type of this layer */ CMS_Decoder::Content_Type CMS_Decoder::layer_type() const { if(type == OIDS::lookup("CMS.DataContent")) return DATA; if(type == OIDS::lookup("CMS.EnvelopedData")) return ENVELOPED; if(type == OIDS::lookup("CMS.CompressedData")) return COMPRESSED; if(type == OIDS::lookup("CMS.SignedData")) return SIGNED; if(type == OIDS::lookup("CMS.AuthenticatedData")) return AUTHENTICATED; if(type == OIDS::lookup("CMS.DigestedData")) return DIGESTED; return UNKNOWN; } /* * Return some information about this layer */ std::string CMS_Decoder::layer_info() const { return info; } /* * Return some information about this layer */ void CMS_Decoder::read_econtent(BER_Decoder& decoder) { BER_Decoder econtent_info = decoder.start_cons(SEQUENCE); econtent_info.decode(next_type); // FIXME //BER_Decoder econtent = BER::get_subsequence(econtent_info, ASN1_Tag(0)); //econtent.decode(data, OCTET_STRING); } }