Various encryption-related stuff.

[libdcp.git] / src / certificates.cc

diff --git a/src/certificates.cc b/src/certificates.cc
index c1b15c51ac0e9cd18974b565994e0349ff6e116c..6d9c449dab371f2995a46ca2a64d23b5c59a6a21 100644 (file)
--- a/src/certificates.cc
+++ b/src/certificates.cc
@@ -26,6 +26,7 @@
 #include <libxml++/nodes/element.h>
 #include "KM_util.h"
 #include "certificates.h"
+#include "compose.hpp"
 #include "exceptions.h"
 
 using std::list;
@@ -42,7 +43,7 @@ Certificate::Certificate (X509* c)
        
 }
 
-Certificate::Certificate (string const & filename)
+Certificate::Certificate (boost::filesystem::path filename)
        : _certificate (0)
 {
        FILE* f = fopen (filename.c_str(), "r");
@@ -55,14 +56,55 @@ Certificate::Certificate (string const & filename)
        }
 }
 
+Certificate::Certificate (string cert)
+{
+       read_string (cert);
+}
+
+Certificate::Certificate (Certificate const & other)
+{
+       read_string (other.certificate (true));
+}
+
+void
+Certificate::read_string (string cert)
+{
+       BIO* bio = BIO_new_mem_buf (const_cast<char *> (cert.c_str ()), -1);
+       if (!bio) {
+               throw MiscError ("could not create memory BIO");
+       }
+
+       _certificate = PEM_read_bio_X509 (bio, 0, 0, 0);
+       if (!_certificate) {
+               throw MiscError ("could not read X509 certificate from memory BIO");
+       }
+
+       BIO_free (bio);
+}
+
 Certificate::~Certificate ()
 {
        X509_free (_certificate);
 }
 
+Certificate &
+Certificate::operator= (Certificate const & other)
+{
+       if (this == &other) {
+               return *this;
+       }
+       
+       X509_free (_certificate);
+       read_string (other.certificate ());
+
+       return *this;
+}
+
 string
-Certificate::certificate () const
+Certificate::certificate (bool with_begin_end) const
 {
+       assert (_certificate);
+       
        BIO* bio = BIO_new (BIO_s_mem ());
        if (!bio) {
                throw MiscError ("could not create memory BIO");
@@ -79,53 +121,71 @@ Certificate::certificate () const
 
        BIO_free (bio);
 
-       boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
-       boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
+       if (!with_begin_end) {
+               boost::replace_all (s, "-----BEGIN CERTIFICATE-----\n", "");
+               boost::replace_all (s, "\n-----END CERTIFICATE-----\n", "");
+       }
+       
        return s;
 }
 
 string
 Certificate::issuer () const
 {
-       X509_NAME* n = X509_get_issuer_name (_certificate);
-       assert (n);
+       assert (_certificate);
+       return name_for_xml (X509_get_issuer_name (_certificate));
+}
 
-       char b[256];
-       X509_NAME_oneline (n, b, 256);
-       return b;
+string
+Certificate::asn_to_utf8 (ASN1_STRING* s)
+{
+       unsigned char* buf = 0;
+       ASN1_STRING_to_UTF8 (&buf, s);
+       string const u (reinterpret_cast<char *> (buf));
+       OPENSSL_free (buf);
+       return u;
 }
 
 string
-Certificate::name_for_xml (string const & n)
+Certificate::get_name_part (X509_NAME* n, int nid)
 {
-       stringstream x;
+       int p = -1;
+       p = X509_NAME_get_index_by_NID (n, nid, p);
+       assert (p != -1);
+       return asn_to_utf8 (X509_NAME_ENTRY_get_data (X509_NAME_get_entry (n, p)));
+}
        
-       vector<string> p;
-       boost::split (p, n, boost::is_any_of ("/"));
-       for (vector<string>::const_reverse_iterator i = p.rbegin(); i != p.rend(); ++i) {
-               x << *i << ",";
-       }
 
-       string s = x.str();
-       boost::replace_all (s, "+", "\\+");
+string
+Certificate::name_for_xml (X509_NAME * n)
+{
+       assert (n);
 
-       return s.substr(0, s.length() - 2);
+       string s = String::compose (
+               "dnQualifier=%1,CN=%2,OU=%3,O=%4",
+               get_name_part (n, NID_dnQualifier),
+               get_name_part (n, NID_commonName),
+               get_name_part (n, NID_organizationalUnitName),
+               get_name_part (n, NID_organizationName)
+               );
+       
+       boost::replace_all (s, "+", "\\+");
+       return s;
 }
 
 string
 Certificate::subject () const
 {
-       X509_NAME* n = X509_get_subject_name (_certificate);
-       assert (n);
+       assert (_certificate);
 
-       char b[256];
-       X509_NAME_oneline (n, b, 256);
-       return b;
+       return name_for_xml (X509_get_subject_name (_certificate));
 }
 
 string
 Certificate::serial () const
 {
+       assert (_certificate);
+
        ASN1_INTEGER* s = X509_get_serialNumber (_certificate);
        assert (s);
        
@@ -142,6 +202,8 @@ Certificate::serial () const
 string
 Certificate::thumbprint () const
 {
+       assert (_certificate);
+       
        uint8_t buffer[8192];
        uint8_t* p = buffer;
        i2d_X509_CINF (_certificate->cert_info, &p);