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/**
* @file certificate.c
*
* @brief Implementation of certificate_t.
*
*/
/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <gmp.h>
#include <sys/stat.h>
#include <unistd.h>
#include "certificate.h"
#include <daemon.h>
#include <utils/allocator.h>
#include <asn1/der_decoder.h>
typedef struct private_certificate_t private_certificate_t;
/**
* Private data of a certificate_t object.
*/
struct private_certificate_t {
/**
* Public interface for this signer.
*/
certificate_t public;
u_int version;
u_int serial;
chunk_t sign_alg;
time_t not_before;
time_t not_after;
chunk_t pubkey;
chunk_t pubkey_alg;
bool has_issuer_uid;
chunk_t issuer_uid;
bool has_subject_uid;
chunk_t subject_uid;
chunk_t tbs_cert;
chunk_t signature;
rsa_public_key_t *public_key;
};
#define OSET(x) offsetof(private_certificate_t, x)
/**
* Rules for de-/encoding of a certificate from/in ASN1
*/
static asn1_rule_t certificate_rules[] = {
{ASN1_SEQUENCE, 0, 0, 0 }, /* certificate */
{ ASN1_SEQUENCE, ASN1_RAW, OSET(tbs_cert), 0 }, /* tbsCertificate */
{ ASN1_TAG_E_0, ASN1_DEFAULT, OSET(version), 0 }, /* EXPLICIT */
{ ASN1_INTEGER, ASN1_DEFAULT, OSET(version), 0 }, /* version DEFAULT v1(0) */
{ ASN1_INTEGER, 0, OSET(serial), 0 }, /* serialNumber */
{ ASN1_SEQUENCE, 0, 0, 0 }, /* signature */
{ ASN1_OID, 0, OSET(sign_alg), 0 }, /* algorithm-oid */
{ ASN1_NULL, 0, 0, 0 }, /* parameters */
{ ASN1_END, 0, 0, 0 }, /* signature */
{ ASN1_SEQUENCE, ASN1_OF, 0, 0 }, /* issuer */
// { ASN1_SET, ASN1_OF, 0, 0, }, /* RelativeDistinguishedName */
// { ASN1_SEQUENCE, 0, 0, 0, }, /* AttributeTypeAndValue */
// { ASN1_OID, 0, 0, 0 }, /* AttributeType */
// { ASN1_ANY, 0, 0, 0 }, /* AttributeValue */
// { ASN1_END, 0, 0, 0 }, /* AttributeTypeAndValue */
// { ASN1_END, 0, 0, 0 }, /* RelativeDistinguishedName */
{ ASN1_END, 0, 0, 0 }, /* issuer */
{ ASN1_SEQUENCE, 0, 0, 0 }, /* validity */
{ ASN1_CHOICE, 0, 0, 0 }, /* notBefore */
{ ASN1_UTCTIME, 0, OSET(not_before), 0 }, /* utcTime */
{ ASN1_GENERALIZEDTIME, 0, OSET(not_before), 0 }, /* generalTime */
{ ASN1_END, 0, 0, 0 }, /* notBefore */
{ ASN1_CHOICE, 0, 0, 0 }, /* notAfter */
{ ASN1_UTCTIME, 0, OSET(not_after), 0 }, /* utcTime */
{ ASN1_GENERALIZEDTIME, 0, OSET(not_after), 0 }, /* generalTime */
{ ASN1_END, 0, 0, 0 }, /* notAfter */
{ ASN1_END, 0, 0, 0 }, /* validity */
{ ASN1_SEQUENCE, ASN1_OF, 0, 0 }, /* subject */
// { ASN1_SET, ASN1_OF, 0, 0, }, /* RelativeDistinguishedName */
// { ASN1_SEQUENCE, 0, 0, 0, }, /* AttributeTypeAndValue */
// { ASN1_OID, 0, 0, 0 }, /* AttributeType */
// { ASN1_ANY, 0, 0, 0 }, /* AttributeValue */
// { ASN1_END, 0, 0, 0 }, /* AttributeTypeAndValue */
// { ASN1_END, 0, 0, 0 }, /* RelativeDistinguishedName */
{ ASN1_END, 0, 0, 0 }, /* subject */
{ ASN1_SEQUENCE, 0, 0, 0 }, /* subjectPublicKeyInfo */
{ ASN1_SEQUENCE, 0, 0, 0 }, /* algorithm */
{ ASN1_OID, 0, OSET(pubkey_alg), 0 }, /* algorithm-oid */
{ ASN1_NULL, 0, 0, 0 }, /* parameters */
{ ASN1_END, 0, 0, 0 }, /* algorithm */
{ ASN1_BITSTRING, 0, OSET(pubkey), 0 }, /* subjectPublicKey */
{ ASN1_END, 0, 0, 0 }, /* subjectPublicKeyInfo */
{ ASN1_TAG_I_1, ASN1_OPTIONAL, 0, OSET(has_issuer_uid)}, /* IMPLICIT */
{ ASN1_BITSTRING, ASN1_OPTIONAL, OSET(issuer_uid), 0 }, /* issuerUniqueID OPTIONAL */
{ ASN1_TAG_I_2, ASN1_OPTIONAL, 0, OSET(has_subject_uid)},/* IMPLICIT */
{ ASN1_BITSTRING, ASN1_OPTIONAL, OSET(subject_uid), 0 }, /* subjectUniqueID OPTIONAL */
{ ASN1_TAG_E_3, ASN1_OPTIONAL, 0, 0 }, /* EXPLICIT */
{ ASN1_SEQUENCE, ASN1_OF|ASN1_OPTIONAL, 0, 0 }, /* extensions OPTIONAL */
// { ASN1_SEQUENCE, 0, 0, 0, }, /* extension */
// { ASN1_OID, 0, 0, 0 }, /* extnID */
// { ASN1_BOOLEAN, ASN1_DEFAULT, 0, FALSE }, /* critical */
// { ASN1_OCTETSTRING, 0, 0, 0, }, /* extnValue */
// { ASN1_END, 0, 0, 0, }, /* extension */
{ ASN1_END, 0, 0, 0, }, /* extensions */
{ ASN1_END, 0, 0, 0 }, /* tbsCertificate */
{ ASN1_SEQUENCE, 0, 0, 0 }, /* signatureAlgorithm */
{ ASN1_OID, 0, OSET(sign_alg), 0 }, /* algorithm-oid */
{ ASN1_NULL, 0, 0, 0 }, /* parameters */
{ ASN1_END, 0, 0, 0 }, /* signatureAlgorithm */
{ ASN1_BITSTRING, 0, OSET(signature), 0 }, /* signatureValue */
{ASN1_END, 0, 0, 0 }, /* certificate */
};
/**
* Implementation of certificate.get_public_key.
*/
static rsa_public_key_t *get_public_key(private_certificate_t *this)
{
return this->public_key->clone(this->public_key);
}
/**
* Implementation of certificate.destroy.
*/
static void destroy(private_certificate_t *this)
{
this->public_key->destroy(this->public_key);
allocator_free(this->pubkey.ptr);
allocator_free(this->signature.ptr);
allocator_free(this->tbs_cert.ptr);
allocator_free(this);
}
/*
* Described in header.
*/
certificate_t *certificate_create_from_chunk(chunk_t chunk)
{
private_certificate_t *this = allocator_alloc_thing(private_certificate_t);
der_decoder_t *dd;
/* public functions */
this->public.get_public_key = (rsa_public_key_t *(*) (certificate_t*))get_public_key;
this->public.destroy = (void (*) (certificate_t*))destroy;
/* initialize */
this->pubkey = CHUNK_INITIALIZER;
this->signature = CHUNK_INITIALIZER;
this->tbs_cert = CHUNK_INITIALIZER;
dd = der_decoder_create(certificate_rules);
if (dd->decode(dd, chunk, this) != SUCCESS)
{
allocator_free(this);
dd->destroy(dd);
return NULL;
}
dd->destroy(dd);
this->public_key = rsa_public_key_create_from_chunk(this->pubkey);
if (this->public_key == NULL)
{
allocator_free(this->pubkey.ptr);
allocator_free(this);
return NULL;
}
return &this->public;
}
/*
* Described in header.
*/
certificate_t *certificate_create_from_file(char *filename)
{
struct stat stb;
FILE *file;
char *buffer;
chunk_t chunk;
if (stat(filename, &stb) == -1)
{
return NULL;
}
buffer = alloca(stb.st_size);
file = fopen(filename, "r");
if (file == NULL)
{
return NULL;
}
if (fread(buffer, stb.st_size, 1, file) == -1)
{
return NULL;
}
chunk.ptr = buffer;
chunk.len = stb.st_size;
return certificate_create_from_chunk(chunk);
}
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