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/*
* Certificate Store
* (C) 1999-2010,2013 Jack Lloyd
* (C) 2017 Fabian Weissberg, Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/certstor.h>
#include <botan/pkix_types.h>
#include <botan/internal/filesystem.h>
#include <botan/hash.h>
#include <botan/data_src.h>
namespace Botan {
Certificate_Store::~Certificate_Store() {}
std::optional<X509_Certificate>
Certificate_Store::find_cert(const X509_DN& subject_dn, const std::vector<uint8_t>& key_id) const
{
const auto certs = find_all_certs(subject_dn, key_id);
if(certs.empty())
{
return std::nullopt;
}
// `count` might be greater than 1, but we'll just select the first match
return certs.front();
}
std::optional<X509_CRL> Certificate_Store::find_crl_for(const X509_Certificate&) const
{
return std::nullopt;
}
void Certificate_Store_In_Memory::add_certificate(const X509_Certificate& cert)
{
for(const auto& c : m_certs)
if(c == cert)
return;
m_certs.push_back(cert);
}
std::vector<X509_DN> Certificate_Store_In_Memory::all_subjects() const
{
std::vector<X509_DN> subjects;
for(const auto& cert : m_certs)
subjects.push_back(cert.subject_dn());
return subjects;
}
std::optional<X509_Certificate>
Certificate_Store_In_Memory::find_cert(const X509_DN& subject_dn,
const std::vector<uint8_t>& key_id) const
{
for(const auto& cert : m_certs)
{
// Only compare key ids if set in both call and in the cert
if(key_id.size())
{
std::vector<uint8_t> skid = cert.subject_key_id();
if(skid.size() && skid != key_id) // no match
continue;
}
if(cert.subject_dn() == subject_dn)
return cert;
}
return std::nullopt;
}
std::vector<X509_Certificate> Certificate_Store_In_Memory::find_all_certs(
const X509_DN& subject_dn,
const std::vector<uint8_t>& key_id) const
{
std::vector<X509_Certificate> matches;
for(const auto& cert : m_certs)
{
if(key_id.size())
{
std::vector<uint8_t> skid = cert.subject_key_id();
if(skid.size() && skid != key_id) // no match
continue;
}
if(cert.subject_dn() == subject_dn)
matches.push_back(cert);
}
return matches;
}
std::optional<X509_Certificate>
Certificate_Store_In_Memory::find_cert_by_pubkey_sha1(const std::vector<uint8_t>& key_hash) const
{
if(key_hash.size() != 20)
throw Invalid_Argument("Certificate_Store_In_Memory::find_cert_by_pubkey_sha1 invalid hash");
std::unique_ptr<HashFunction> hash(HashFunction::create("SHA-1"));
for(const auto& cert : m_certs){
hash->update(cert.subject_public_key_bitstring());
if(key_hash == hash->final_stdvec()) //final_stdvec also clears the hash to initial state
return cert;
}
return std::nullopt;
}
std::optional<X509_Certificate>
Certificate_Store_In_Memory::find_cert_by_raw_subject_dn_sha256(const std::vector<uint8_t>& subject_hash) const
{
if(subject_hash.size() != 32)
throw Invalid_Argument("Certificate_Store_In_Memory::find_cert_by_raw_subject_dn_sha256 invalid hash");
std::unique_ptr<HashFunction> hash(HashFunction::create("SHA-256"));
for(const auto& cert : m_certs){
hash->update(cert.raw_subject_dn());
if(subject_hash == hash->final_stdvec()) //final_stdvec also clears the hash to initial state
return cert;
}
return std::nullopt;
}
void Certificate_Store_In_Memory::add_crl(const X509_CRL& crl)
{
X509_DN crl_issuer = crl.issuer_dn();
for(auto& c : m_crls)
{
// Found an update of a previously existing one; replace it
if(c.issuer_dn() == crl_issuer)
{
if(c.this_update() <= crl.this_update())
c = crl;
return;
}
}
// Totally new CRL, add to the list
m_crls.push_back(crl);
}
std::optional<X509_CRL> Certificate_Store_In_Memory::find_crl_for(const X509_Certificate& subject) const
{
const std::vector<uint8_t>& key_id = subject.authority_key_id();
for(const auto& c : m_crls)
{
// Only compare key ids if set in both call and in the CRL
if(key_id.size())
{
std::vector<uint8_t> akid = c.authority_key_id();
if(akid.size() && akid != key_id) // no match
continue;
}
if(c.issuer_dn() == subject.issuer_dn())
return c;
}
return {};
}
Certificate_Store_In_Memory::Certificate_Store_In_Memory(const X509_Certificate& cert)
{
add_certificate(cert);
}
#if defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)
Certificate_Store_In_Memory::Certificate_Store_In_Memory(const std::string& dir)
{
if(dir.empty())
return;
std::vector<std::string> maybe_certs = get_files_recursive(dir);
if(maybe_certs.empty())
{
maybe_certs.push_back(dir);
}
for(auto&& cert_file : maybe_certs)
{
try
{
DataSource_Stream src(cert_file, true);
while(!src.end_of_data())
{
try
{
X509_Certificate cert(src);
m_certs.push_back(cert);
}
catch(std::exception&)
{
// stop searching for other certificate at first exception
break;
}
}
}
catch(std::exception&)
{
}
}
}
#endif
}
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