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|
/*
* Copyright (C) 2003, 2004, 2005 Free Software Foundation
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
/* Functions that relate on PKCS7 certificate lists parsing.
*/
#include <gnutls_int.h>
#include <libtasn1.h>
#ifdef ENABLE_PKI
#include <gnutls_datum.h>
#include <gnutls_global.h>
#include <gnutls_errors.h>
#include <common.h>
#include <x509_b64.h>
#include <pkcs7.h>
#include <dn.h>
#define SIGNED_DATA_OID "1.2.840.113549.1.7.2"
/* Decodes the PKCS #7 signed data, and returns an ASN1_TYPE,
* which holds them. If raw is non null then the raw decoded
* data are copied (they are locally allocated) there.
*/
static int
_decode_pkcs7_signed_data (ASN1_TYPE pkcs7, ASN1_TYPE * sdata,
gnutls_datum_t * raw)
{
char oid[128];
ASN1_TYPE c2;
opaque *tmp = NULL;
int tmp_size, len, result;
len = sizeof (oid) - 1;
result = asn1_read_value (pkcs7, "contentType", oid, &len);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
return mhd_gtls_asn2err (result);
}
if (strcmp (oid, SIGNED_DATA_OID) != 0)
{
gnutls_assert ();
_gnutls_x509_log ("Unknown PKCS7 Content OID '%s'\n", oid);
return GNUTLS_E_UNKNOWN_PKCS_CONTENT_TYPE;
}
if ((result = asn1_create_element
(_gnutls_get_pkix (), "PKIX1.pkcs-7-SignedData", &c2)) != ASN1_SUCCESS)
{
gnutls_assert ();
return mhd_gtls_asn2err (result);
}
/* the Signed-data has been created, so
* decode them.
*/
tmp_size = 0;
result = asn1_read_value (pkcs7, "content", NULL, &tmp_size);
if (result != ASN1_MEM_ERROR)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
tmp = gnutls_malloc (tmp_size);
if (tmp == NULL)
{
gnutls_assert ();
result = GNUTLS_E_MEMORY_ERROR;
goto cleanup;
}
result = asn1_read_value (pkcs7, "content", tmp, &tmp_size);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* tmp, tmp_size hold the data and the size of the CertificateSet structure
* actually the ANY stuff.
*/
/* Step 1. In case of a signed structure extract certificate set.
*/
result = asn1_der_decoding (&c2, tmp, tmp_size, NULL);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
if (raw == NULL)
{
gnutls_free (tmp);
}
else
{
raw->data = tmp;
raw->size = tmp_size;
}
*sdata = c2;
return 0;
cleanup:
if (c2)
asn1_delete_structure (&c2);
gnutls_free (tmp);
return result;
}
/**
* gnutls_pkcs7_init - This function initializes a gnutls_pkcs7_t structure
* @pkcs7: The structure to be initialized
*
* This function will initialize a PKCS7 structure. PKCS7 structures
* usually contain lists of X.509 Certificates and X.509 Certificate
* revocation lists.
*
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_init (gnutls_pkcs7_t * pkcs7)
{
*pkcs7 = gnutls_calloc (1, sizeof (gnutls_pkcs7_int));
if (*pkcs7)
{
int result = asn1_create_element (_gnutls_get_pkix (),
"PKIX1.pkcs-7-ContentInfo",
&(*pkcs7)->pkcs7);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
gnutls_free (*pkcs7);
return mhd_gtls_asn2err (result);
}
return 0; /* success */
}
return GNUTLS_E_MEMORY_ERROR;
}
/**
* gnutls_pkcs7_deinit - This function deinitializes memory used by a gnutls_pkcs7_t structure
* @pkcs7: The structure to be initialized
*
* This function will deinitialize a PKCS7 structure.
*
**/
void
gnutls_pkcs7_deinit (gnutls_pkcs7_t pkcs7)
{
if (!pkcs7)
return;
if (pkcs7->pkcs7)
asn1_delete_structure (&pkcs7->pkcs7);
gnutls_free (pkcs7);
}
/**
* gnutls_pkcs7_import - This function will import a DER or PEM encoded PKCS7
* @pkcs7: The structure to store the parsed PKCS7.
* @data: The DER or PEM encoded PKCS7.
* @format: One of DER or PEM
*
* This function will convert the given DER or PEM encoded PKCS7
* to the native gnutls_pkcs7_t format. The output will be stored in 'pkcs7'.
*
* If the PKCS7 is PEM encoded it should have a header of "PKCS7".
*
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_import (gnutls_pkcs7_t pkcs7, const gnutls_datum_t * data,
gnutls_x509_crt_fmt_t format)
{
int result = 0, need_free = 0;
gnutls_datum_t _data;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
_data.data = data->data;
_data.size = data->size;
/* If the PKCS7 is in PEM format then decode it
*/
if (format == GNUTLS_X509_FMT_PEM)
{
opaque *out;
result = _gnutls_fbase64_decode (PEM_PKCS7, data->data, data->size,
&out);
if (result <= 0)
{
if (result == 0)
result = GNUTLS_E_INTERNAL_ERROR;
gnutls_assert ();
return result;
}
_data.data = out;
_data.size = result;
need_free = 1;
}
result = asn1_der_decoding (&pkcs7->pkcs7, _data.data, _data.size, NULL);
if (result != ASN1_SUCCESS)
{
result = mhd_gtls_asn2err (result);
gnutls_assert ();
goto cleanup;
}
if (need_free)
_gnutls_free_datum (&_data);
return 0;
cleanup:
if (need_free)
_gnutls_free_datum (&_data);
return result;
}
/**
* gnutls_pkcs7_get_crt_raw - This function returns a certificate in a PKCS7 certificate set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @indx: contains the index of the certificate to extract
* @certificate: the contents of the certificate will be copied there (may be null)
* @certificate_size: should hold the size of the certificate
*
* This function will return a certificate of the PKCS7 or RFC2630 certificate set.
* Returns 0 on success. If the provided buffer is not long enough,
* then @certificate_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER is returned.
*
* After the last certificate has been read GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE
* will be returned.
*
**/
int
gnutls_pkcs7_get_crt_raw (gnutls_pkcs7_t pkcs7,
int indx, void *certificate,
size_t * certificate_size)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result, len;
char root2[MAX_NAME_SIZE];
char oid[128];
gnutls_datum_t tmp = { NULL, 0 };
if (certificate_size == NULL || pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, &tmp);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Parse the CertificateSet
*/
snprintf (root2, sizeof (root2), "certificates.?%u", indx + 1);
len = sizeof (oid) - 1;
result = asn1_read_value (c2, root2, oid, &len);
if (result == ASN1_VALUE_NOT_FOUND)
{
result = GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
goto cleanup;
}
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* if 'Certificate' is the choice found:
*/
if (strcmp (oid, "certificate") == 0)
{
int start, end;
result = asn1_der_decoding_startEnd (c2, tmp.data, tmp.size,
root2, &start, &end);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
end = end - start + 1;
if ((unsigned) end > *certificate_size)
{
*certificate_size = end;
result = GNUTLS_E_SHORT_MEMORY_BUFFER;
goto cleanup;
}
if (certificate)
memcpy (certificate, &tmp.data[start], end);
*certificate_size = end;
result = 0;
}
else
{
result = GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE;
}
cleanup:
_gnutls_free_datum (&tmp);
if (c2)
asn1_delete_structure (&c2);
return result;
}
/**
* gnutls_pkcs7_get_crt_count - This function returns the number of certificates in a PKCS7 certificate set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
*
* This function will return the number of certifcates in the PKCS7 or
* RFC2630 certificate set.
*
* Returns a negative value on failure.
*
**/
int
gnutls_pkcs7_get_crt_count (gnutls_pkcs7_t pkcs7)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result, count;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Count the CertificateSet */
result = asn1_number_of_elements (c2, "certificates", &count);
asn1_delete_structure (&c2);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
return 0; /* no certificates */
}
return count;
}
/**
* gnutls_pkcs7_export - This function will export the pkcs7 structure
* @pkcs7: Holds the pkcs7 structure
* @format: the format of output params. One of PEM or DER.
* @output_data: will contain a structure PEM or DER encoded
* @output_data_size: holds the size of output_data (and will be
* replaced by the actual size of parameters)
*
* This function will export the pkcs7 structure to DER or PEM format.
*
* If the buffer provided is not long enough to hold the output, then
* *output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will
* be returned.
*
* If the structure is PEM encoded, it will have a header
* of "BEGIN PKCS7".
*
* Return value: In case of failure a negative value will be
* returned, and 0 on success.
*
**/
int
gnutls_pkcs7_export (gnutls_pkcs7_t pkcs7,
gnutls_x509_crt_fmt_t format, void *output_data,
size_t * output_data_size)
{
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
return _gnutls_x509_export_int (pkcs7->pkcs7, format, PEM_PKCS7,
output_data, output_data_size);
}
/* Creates an empty signed data structure in the pkcs7
* structure and returns a handle to the signed data.
*/
static int
create_empty_signed_data (ASN1_TYPE pkcs7, ASN1_TYPE * sdata)
{
uint8_t one = 1;
int result;
*sdata = ASN1_TYPE_EMPTY;
if ((result = asn1_create_element
(_gnutls_get_pkix (), "PKIX1.pkcs-7-SignedData",
sdata)) != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Use version 1
*/
result = asn1_write_value (*sdata, "version", &one, 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Use no digest algorithms
*/
/* id-data */
result =
asn1_write_value (*sdata, "encapContentInfo.eContentType",
"1.2.840.113549.1.7.5", 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
result = asn1_write_value (*sdata, "encapContentInfo.eContent", NULL, 0);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Add no certificates.
*/
/* Add no crls.
*/
/* Add no signerInfos.
*/
/* Write the content type of the signed data
*/
result = asn1_write_value (pkcs7, "contentType", SIGNED_DATA_OID, 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
return 0;
cleanup:
asn1_delete_structure (sdata);
return result;
}
/**
* gnutls_pkcs7_set_crt_raw - This function adds a certificate in a PKCS7 certificate set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @crt: the DER encoded certificate to be added
*
* This function will add a certificate to the PKCS7 or RFC2630 certificate set.
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_set_crt_raw (gnutls_pkcs7_t pkcs7, const gnutls_datum_t * crt)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0 && result != GNUTLS_E_ASN1_VALUE_NOT_FOUND)
{
gnutls_assert ();
return result;
}
/* If the signed data are uninitialized
* then create them.
*/
if (result == GNUTLS_E_ASN1_VALUE_NOT_FOUND)
{
/* The pkcs7 structure is new, so create the
* signedData.
*/
result = create_empty_signed_data (pkcs7->pkcs7, &c2);
if (result < 0)
{
gnutls_assert ();
return result;
}
}
/* Step 2. Append the new certificate.
*/
result = asn1_write_value (c2, "certificates", "NEW", 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
result = asn1_write_value (c2, "certificates.?LAST", "certificate", 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
result =
asn1_write_value (c2, "certificates.?LAST.certificate", crt->data,
crt->size);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Step 3. Replace the old content with the new
*/
result =
_gnutls_x509_der_encode_and_copy (c2, "", pkcs7->pkcs7, "content", 0);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
asn1_delete_structure (&c2);
return 0;
cleanup:
if (c2)
asn1_delete_structure (&c2);
return result;
}
/**
* gnutls_pkcs7_set_crt - This function adds a parsed certificate in a PKCS7 certificate set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @crt: the certificate to be copied.
*
* This function will add a parsed certificate to the PKCS7 or RFC2630 certificate set.
* This is a wrapper function over gnutls_pkcs7_set_crt_raw() .
*
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_set_crt (gnutls_pkcs7_t pkcs7, gnutls_x509_crt_t crt)
{
int ret;
gnutls_datum_t data;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
ret = _gnutls_x509_der_encode (crt->cert, "", &data, 0);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_pkcs7_set_crt_raw (pkcs7, &data);
_gnutls_free_datum (&data);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
/**
* gnutls_pkcs7_delete_crt - This function deletes a certificate from a PKCS7 certificate set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @indx: the index of the certificate to delete
*
* This function will delete a certificate from a PKCS7 or RFC2630 certificate set.
* Index starts from 0. Returns 0 on success.
*
**/
int
gnutls_pkcs7_delete_crt (gnutls_pkcs7_t pkcs7, int indx)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result;
char root2[MAX_NAME_SIZE];
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. Decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Delete the certificate.
*/
snprintf (root2, sizeof (root2), "certificates.?%u", indx + 1);
result = asn1_write_value (c2, root2, NULL, 0);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Step 3. Replace the old content with the new
*/
result =
_gnutls_x509_der_encode_and_copy (c2, "", pkcs7->pkcs7, "content", 0);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
asn1_delete_structure (&c2);
return 0;
cleanup:
if (c2)
asn1_delete_structure (&c2);
return result;
}
/* Read and write CRLs
*/
/**
* gnutls_pkcs7_get_crl_raw - This function returns a crl in a PKCS7 crl set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @indx: contains the index of the crl to extract
* @crl: the contents of the crl will be copied there (may be null)
* @crl_size: should hold the size of the crl
*
* This function will return a crl of the PKCS7 or RFC2630 crl set.
* Returns 0 on success. If the provided buffer is not long enough,
* then @crl_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER is returned.
*
* After the last crl has been read GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE
* will be returned.
*
**/
int
gnutls_pkcs7_get_crl_raw (gnutls_pkcs7_t pkcs7,
int indx, void *crl, size_t * crl_size)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result;
char root2[MAX_NAME_SIZE];
gnutls_datum_t tmp = { NULL, 0 };
int start, end;
if (pkcs7 == NULL || crl_size == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, &tmp);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Parse the CertificateSet
*/
snprintf (root2, sizeof (root2), "crls.?%u", indx + 1);
/* Get the raw CRL
*/
result = asn1_der_decoding_startEnd (c2, tmp.data, tmp.size,
root2, &start, &end);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
end = end - start + 1;
if ((unsigned) end > *crl_size)
{
*crl_size = end;
result = GNUTLS_E_SHORT_MEMORY_BUFFER;
goto cleanup;
}
if (crl)
memcpy (crl, &tmp.data[start], end);
*crl_size = end;
result = 0;
cleanup:
_gnutls_free_datum (&tmp);
if (c2)
asn1_delete_structure (&c2);
return result;
}
/**
* gnutls_pkcs7_get_crl_count - This function returns the number of crls in a PKCS7 crl set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
*
* This function will return the number of certifcates in the PKCS7 or
* RFC2630 crl set.
*
* Returns a negative value on failure.
*
**/
int
gnutls_pkcs7_get_crl_count (gnutls_pkcs7_t pkcs7)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result, count;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Count the CertificateSet */
result = asn1_number_of_elements (c2, "crls", &count);
asn1_delete_structure (&c2);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
return 0; /* no crls */
}
return count;
}
/**
* gnutls_pkcs7_set_crl_raw - This function adds a crl in a PKCS7 crl set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @crl: the DER encoded crl to be added
*
* This function will add a crl to the PKCS7 or RFC2630 crl set.
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_set_crl_raw (gnutls_pkcs7_t pkcs7, const gnutls_datum_t * crl)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0 && result != GNUTLS_E_ASN1_VALUE_NOT_FOUND)
{
gnutls_assert ();
return result;
}
/* If the signed data are uninitialized
* then create them.
*/
if (result == GNUTLS_E_ASN1_VALUE_NOT_FOUND)
{
/* The pkcs7 structure is new, so create the
* signedData.
*/
result = create_empty_signed_data (pkcs7->pkcs7, &c2);
if (result < 0)
{
gnutls_assert ();
return result;
}
}
/* Step 2. Append the new crl.
*/
result = asn1_write_value (c2, "crls", "NEW", 1);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
result = asn1_write_value (c2, "crls.?LAST", crl->data, crl->size);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Step 3. Replace the old content with the new
*/
result =
_gnutls_x509_der_encode_and_copy (c2, "", pkcs7->pkcs7, "content", 0);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
asn1_delete_structure (&c2);
return 0;
cleanup:
if (c2)
asn1_delete_structure (&c2);
return result;
}
/**
* gnutls_pkcs7_set_crl - This function adds a parsed crl in a PKCS7 crl set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @crl: the DER encoded crl to be added
*
* This function will add a parsed crl to the PKCS7 or RFC2630 crl set.
* Returns 0 on success.
*
**/
int
gnutls_pkcs7_set_crl (gnutls_pkcs7_t pkcs7, gnutls_x509_crl_t crl)
{
int ret;
gnutls_datum_t data;
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
ret = _gnutls_x509_der_encode (crl->crl, "", &data, 0);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_pkcs7_set_crl_raw (pkcs7, &data);
_gnutls_free_datum (&data);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
/**
* gnutls_pkcs7_delete_crl - This function deletes a crl from a PKCS7 crl set
* @pkcs7_struct: should contain a gnutls_pkcs7_t structure
* @indx: the index of the crl to delete
*
* This function will delete a crl from a PKCS7 or RFC2630 crl set.
* Index starts from 0. Returns 0 on success.
*
**/
int
gnutls_pkcs7_delete_crl (gnutls_pkcs7_t pkcs7, int indx)
{
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
int result;
char root2[MAX_NAME_SIZE];
if (pkcs7 == NULL)
return GNUTLS_E_INVALID_REQUEST;
/* Step 1. Decode the signed data.
*/
result = _decode_pkcs7_signed_data (pkcs7->pkcs7, &c2, NULL);
if (result < 0)
{
gnutls_assert ();
return result;
}
/* Step 2. Delete the crl.
*/
snprintf (root2, sizeof (root2), "crls.?%u", indx + 1);
result = asn1_write_value (c2, root2, NULL, 0);
if (result != ASN1_SUCCESS)
{
gnutls_assert ();
result = mhd_gtls_asn2err (result);
goto cleanup;
}
/* Step 3. Replace the old content with the new
*/
result =
_gnutls_x509_der_encode_and_copy (c2, "", pkcs7->pkcs7, "content", 0);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
asn1_delete_structure (&c2);
return 0;
cleanup:
if (c2)
asn1_delete_structure (&c2);
return result;
}
#endif /* ENABLE_PKI */
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