diff options
Diffstat (limited to 'FreeRTOS-Labs/Source/mbedtls/library/x509_crl.c')
| -rw-r--r-- | FreeRTOS-Labs/Source/mbedtls/library/x509_crl.c | 773 |
1 files changed, 773 insertions, 0 deletions
diff --git a/FreeRTOS-Labs/Source/mbedtls/library/x509_crl.c b/FreeRTOS-Labs/Source/mbedtls/library/x509_crl.c new file mode 100644 index 000000000..55376a73c --- /dev/null +++ b/FreeRTOS-Labs/Source/mbedtls/library/x509_crl.c @@ -0,0 +1,773 @@ +/*
+ * X.509 Certidicate Revocation List (CRL) parsing
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+/*
+ * The ITU-T X.509 standard defines a certificate format for PKI.
+ *
+ * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
+ * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
+ * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
+ *
+ * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
+ * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_X509_CRL_PARSE_C)
+
+#include "mbedtls/x509_crl.h"
+#include "mbedtls/oid.h"
+#include "mbedtls/platform_util.h"
+
+#include <string.h>
+
+#if defined(MBEDTLS_PEM_PARSE_C)
+#include "mbedtls/pem.h"
+#endif
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdlib.h>
+#include <stdio.h>
+#define mbedtls_free free
+#define mbedtls_calloc calloc
+#define mbedtls_snprintf snprintf
+#endif
+
+#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
+#include <windows.h>
+#else
+#include <time.h>
+#endif
+
+#if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
+#include <stdio.h>
+#endif
+
+/*
+ * Version ::= INTEGER { v1(0), v2(1) }
+ */
+static int x509_crl_get_version( unsigned char **p,
+ const unsigned char *end,
+ int *ver )
+{
+ int ret;
+
+ if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
+ {
+ if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
+ {
+ *ver = 0;
+ return( 0 );
+ }
+
+ return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
+ }
+
+ return( 0 );
+}
+
+/*
+ * X.509 CRL v2 extensions
+ *
+ * We currently don't parse any extension's content, but we do check that the
+ * list of extensions is well-formed and abort on critical extensions (that
+ * are unsupported as we don't support any extension so far)
+ */
+static int x509_get_crl_ext( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_x509_buf *ext )
+{
+ int ret;
+
+ /*
+ * crlExtensions [0] EXPLICIT Extensions OPTIONAL
+ * -- if present, version MUST be v2
+ */
+ if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 )
+ {
+ if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
+ return( 0 );
+
+ return( ret );
+ }
+
+ while( *p < end )
+ {
+ /*
+ * Extension ::= SEQUENCE {
+ * extnID OBJECT IDENTIFIER,
+ * critical BOOLEAN DEFAULT FALSE,
+ * extnValue OCTET STRING }
+ */
+ int is_critical = 0;
+ const unsigned char *end_ext_data;
+ size_t len;
+
+ /* Get enclosing sequence tag */
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+
+ end_ext_data = *p + len;
+
+ /* Get OID (currently ignored) */
+ if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
+ MBEDTLS_ASN1_OID ) ) != 0 )
+ {
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+ }
+ *p += len;
+
+ /* Get optional critical */
+ if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data,
+ &is_critical ) ) != 0 &&
+ ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
+ {
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+ }
+
+ /* Data should be octet string type */
+ if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
+ MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+
+ /* Ignore data so far and just check its length */
+ *p += len;
+ if( *p != end_ext_data )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+
+ /* Abort on (unsupported) critical extensions */
+ if( is_critical )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
+ MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
+ }
+
+ if( *p != end )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+
+ return( 0 );
+}
+
+/*
+ * X.509 CRL v2 entry extensions (no extensions parsed yet.)
+ */
+static int x509_get_crl_entry_ext( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_x509_buf *ext )
+{
+ int ret;
+ size_t len = 0;
+
+ /* OPTIONAL */
+ if( end <= *p )
+ return( 0 );
+
+ ext->tag = **p;
+ ext->p = *p;
+
+ /*
+ * Get CRL-entry extension sequence header
+ * crlEntryExtensions Extensions OPTIONAL -- if present, MUST be v2
+ */
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &ext->len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ {
+ if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
+ {
+ ext->p = NULL;
+ return( 0 );
+ }
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+ }
+
+ end = *p + ext->len;
+
+ if( end != *p + ext->len )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+
+ while( *p < end )
+ {
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
+
+ *p += len;
+ }
+
+ if( *p != end )
+ return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+
+ return( 0 );
+}
+
+/*
+ * X.509 CRL Entries
+ */
+static int x509_get_entries( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_x509_crl_entry *entry )
+{
+ int ret;
+ size_t entry_len;
+ mbedtls_x509_crl_entry *cur_entry = entry;
+
+ if( *p == end )
+ return( 0 );
+
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &entry_len,
+ MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
+ {
+ if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
+ return( 0 );
+
+ return( ret );
+ }
+
+ end = *p + entry_len;
+
+ while( *p < end )
+ {
+ size_t len2;
+ const unsigned char *end2;
+
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &len2,
+ MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
+ {
+ return( ret );
+ }
+
+ cur_entry->raw.tag = **p;
+ cur_entry->raw.p = *p;
+ cur_entry->raw.len = len2;
+ end2 = *p + len2;
+
+ if( ( ret = mbedtls_x509_get_serial( p, end2, &cur_entry->serial ) ) != 0 )
+ return( ret );
+
+ if( ( ret = mbedtls_x509_get_time( p, end2,
+ &cur_entry->revocation_date ) ) != 0 )
+ return( ret );
+
+ if( ( ret = x509_get_crl_entry_ext( p, end2,
+ &cur_entry->entry_ext ) ) != 0 )
+ return( ret );
+
+ if( *p < end )
+ {
+ cur_entry->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl_entry ) );
+
+ if( cur_entry->next == NULL )
+ return( MBEDTLS_ERR_X509_ALLOC_FAILED );
+
+ cur_entry = cur_entry->next;
+ }
+ }
+
+ return( 0 );
+}
+
+/*
+ * Parse one CRLs in DER format and append it to the chained list
+ */
+int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain,
+ const unsigned char *buf, size_t buflen )
+{
+ int ret;
+ size_t len;
+ unsigned char *p = NULL, *end = NULL;
+ mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
+ mbedtls_x509_crl *crl = chain;
+
+ /*
+ * Check for valid input
+ */
+ if( crl == NULL || buf == NULL )
+ return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
+
+ memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
+ memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
+ memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
+
+ /*
+ * Add new CRL on the end of the chain if needed.
+ */
+ while( crl->version != 0 && crl->next != NULL )
+ crl = crl->next;
+
+ if( crl->version != 0 && crl->next == NULL )
+ {
+ crl->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) );
+
+ if( crl->next == NULL )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_ALLOC_FAILED );
+ }
+
+ mbedtls_x509_crl_init( crl->next );
+ crl = crl->next;
+ }
+
+ /*
+ * Copy raw DER-encoded CRL
+ */
+ if( buflen == 0 )
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT );
+
+ p = mbedtls_calloc( 1, buflen );
+ if( p == NULL )
+ return( MBEDTLS_ERR_X509_ALLOC_FAILED );
+
+ memcpy( p, buf, buflen );
+
+ crl->raw.p = p;
+ crl->raw.len = buflen;
+
+ end = p + buflen;
+
+ /*
+ * CertificateList ::= SEQUENCE {
+ * tbsCertList TBSCertList,
+ * signatureAlgorithm AlgorithmIdentifier,
+ * signatureValue BIT STRING }
+ */
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT );
+ }
+
+ if( len != (size_t) ( end - p ) )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+ }
+
+ /*
+ * TBSCertList ::= SEQUENCE {
+ */
+ crl->tbs.p = p;
+
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
+ }
+
+ end = p + len;
+ crl->tbs.len = end - crl->tbs.p;
+
+ /*
+ * Version ::= INTEGER OPTIONAL { v1(0), v2(1) }
+ * -- if present, MUST be v2
+ *
+ * signature AlgorithmIdentifier
+ */
+ if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 ||
+ ( ret = mbedtls_x509_get_alg( &p, end, &crl->sig_oid, &sig_params1 ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ if( crl->version < 0 || crl->version > 1 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
+ }
+
+ crl->version++;
+
+ if( ( ret = mbedtls_x509_get_sig_alg( &crl->sig_oid, &sig_params1,
+ &crl->sig_md, &crl->sig_pk,
+ &crl->sig_opts ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
+ }
+
+ /*
+ * issuer Name
+ */
+ crl->issuer_raw.p = p;
+
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
+ }
+
+ if( ( ret = mbedtls_x509_get_name( &p, p + len, &crl->issuer ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ crl->issuer_raw.len = p - crl->issuer_raw.p;
+
+ /*
+ * thisUpdate Time
+ * nextUpdate Time OPTIONAL
+ */
+ if( ( ret = mbedtls_x509_get_time( &p, end, &crl->this_update ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ if( ( ret = mbedtls_x509_get_time( &p, end, &crl->next_update ) ) != 0 )
+ {
+ if( ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
+ MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) &&
+ ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
+ MBEDTLS_ERR_ASN1_OUT_OF_DATA ) )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+ }
+
+ /*
+ * revokedCertificates SEQUENCE OF SEQUENCE {
+ * userCertificate CertificateSerialNumber,
+ * revocationDate Time,
+ * crlEntryExtensions Extensions OPTIONAL
+ * -- if present, MUST be v2
+ * } OPTIONAL
+ */
+ if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ /*
+ * crlExtensions EXPLICIT Extensions OPTIONAL
+ * -- if present, MUST be v2
+ */
+ if( crl->version == 2 )
+ {
+ ret = x509_get_crl_ext( &p, end, &crl->crl_ext );
+
+ if( ret != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+ }
+
+ if( p != end )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+ }
+
+ end = crl->raw.p + crl->raw.len;
+
+ /*
+ * signatureAlgorithm AlgorithmIdentifier,
+ * signatureValue BIT STRING
+ */
+ if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ if( crl->sig_oid.len != sig_oid2.len ||
+ memcmp( crl->sig_oid.p, sig_oid2.p, crl->sig_oid.len ) != 0 ||
+ sig_params1.len != sig_params2.len ||
+ ( sig_params1.len != 0 &&
+ memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_SIG_MISMATCH );
+ }
+
+ if( ( ret = mbedtls_x509_get_sig( &p, end, &crl->sig ) ) != 0 )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( ret );
+ }
+
+ if( p != end )
+ {
+ mbedtls_x509_crl_free( crl );
+ return( MBEDTLS_ERR_X509_INVALID_FORMAT +
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
+ }
+
+ return( 0 );
+}
+
+/*
+ * Parse one or more CRLs and add them to the chained list
+ */
+int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen )
+{
+#if defined(MBEDTLS_PEM_PARSE_C)
+ int ret;
+ size_t use_len;
+ mbedtls_pem_context pem;
+ int is_pem = 0;
+
+ if( chain == NULL || buf == NULL )
+ return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
+
+ do
+ {
+ mbedtls_pem_init( &pem );
+
+ // Avoid calling mbedtls_pem_read_buffer() on non-null-terminated
+ // string
+ if( buflen == 0 || buf[buflen - 1] != '\0' )
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
+ else
+ ret = mbedtls_pem_read_buffer( &pem,
+ "-----BEGIN X509 CRL-----",
+ "-----END X509 CRL-----",
+ buf, NULL, 0, &use_len );
+
+ if( ret == 0 )
+ {
+ /*
+ * Was PEM encoded
+ */
+ is_pem = 1;
+
+ buflen -= use_len;
+ buf += use_len;
+
+ if( ( ret = mbedtls_x509_crl_parse_der( chain,
+ pem.buf, pem.buflen ) ) != 0 )
+ {
+ mbedtls_pem_free( &pem );
+ return( ret );
+ }
+ }
+ else if( is_pem )
+ {
+ mbedtls_pem_free( &pem );
+ return( ret );
+ }
+
+ mbedtls_pem_free( &pem );
+ }
+ /* In the PEM case, buflen is 1 at the end, for the terminated NULL byte.
+ * And a valid CRL cannot be less than 1 byte anyway. */
+ while( is_pem && buflen > 1 );
+
+ if( is_pem )
+ return( 0 );
+ else
+#endif /* MBEDTLS_PEM_PARSE_C */
+ return( mbedtls_x509_crl_parse_der( chain, buf, buflen ) );
+}
+
+#if defined(MBEDTLS_FS_IO)
+/*
+ * Load one or more CRLs and add them to the chained list
+ */
+int mbedtls_x509_crl_parse_file( mbedtls_x509_crl *chain, const char *path )
+{
+ int ret;
+ size_t n;
+ unsigned char *buf;
+
+ if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
+ return( ret );
+
+ ret = mbedtls_x509_crl_parse( chain, buf, n );
+
+ mbedtls_platform_zeroize( buf, n );
+ mbedtls_free( buf );
+
+ return( ret );
+}
+#endif /* MBEDTLS_FS_IO */
+
+/*
+ * Return an informational string about the certificate.
+ */
+#define BEFORE_COLON 14
+#define BC "14"
+/*
+ * Return an informational string about the CRL.
+ */
+int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix,
+ const mbedtls_x509_crl *crl )
+{
+ int ret;
+ size_t n;
+ char *p;
+ const mbedtls_x509_crl_entry *entry;
+
+ p = buf;
+ n = size;
+
+ ret = mbedtls_snprintf( p, n, "%sCRL version : %d",
+ prefix, crl->version );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+ ret = mbedtls_x509_dn_gets( p, n, &crl->issuer );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_snprintf( p, n, "\n%sthis update : " \
+ "%04d-%02d-%02d %02d:%02d:%02d", prefix,
+ crl->this_update.year, crl->this_update.mon,
+ crl->this_update.day, crl->this_update.hour,
+ crl->this_update.min, crl->this_update.sec );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_snprintf( p, n, "\n%snext update : " \
+ "%04d-%02d-%02d %02d:%02d:%02d", prefix,
+ crl->next_update.year, crl->next_update.mon,
+ crl->next_update.day, crl->next_update.hour,
+ crl->next_update.min, crl->next_update.sec );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ entry = &crl->entry;
+
+ ret = mbedtls_snprintf( p, n, "\n%sRevoked certificates:",
+ prefix );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ while( entry != NULL && entry->raw.len != 0 )
+ {
+ ret = mbedtls_snprintf( p, n, "\n%sserial number: ",
+ prefix );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_x509_serial_gets( p, n, &entry->serial );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_snprintf( p, n, " revocation date: " \
+ "%04d-%02d-%02d %02d:%02d:%02d",
+ entry->revocation_date.year, entry->revocation_date.mon,
+ entry->revocation_date.day, entry->revocation_date.hour,
+ entry->revocation_date.min, entry->revocation_date.sec );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ entry = entry->next;
+ }
+
+ ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_x509_sig_alg_gets( p, n, &crl->sig_oid, crl->sig_pk, crl->sig_md,
+ crl->sig_opts );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ ret = mbedtls_snprintf( p, n, "\n" );
+ MBEDTLS_X509_SAFE_SNPRINTF;
+
+ return( (int) ( size - n ) );
+}
+
+/*
+ * Initialize a CRL chain
+ */
+void mbedtls_x509_crl_init( mbedtls_x509_crl *crl )
+{
+ memset( crl, 0, sizeof(mbedtls_x509_crl) );
+}
+
+/*
+ * Unallocate all CRL data
+ */
+void mbedtls_x509_crl_free( mbedtls_x509_crl *crl )
+{
+ mbedtls_x509_crl *crl_cur = crl;
+ mbedtls_x509_crl *crl_prv;
+ mbedtls_x509_name *name_cur;
+ mbedtls_x509_name *name_prv;
+ mbedtls_x509_crl_entry *entry_cur;
+ mbedtls_x509_crl_entry *entry_prv;
+
+ if( crl == NULL )
+ return;
+
+ do
+ {
+#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
+ mbedtls_free( crl_cur->sig_opts );
+#endif
+
+ name_cur = crl_cur->issuer.next;
+ while( name_cur != NULL )
+ {
+ name_prv = name_cur;
+ name_cur = name_cur->next;
+ mbedtls_platform_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
+ mbedtls_free( name_prv );
+ }
+
+ entry_cur = crl_cur->entry.next;
+ while( entry_cur != NULL )
+ {
+ entry_prv = entry_cur;
+ entry_cur = entry_cur->next;
+ mbedtls_platform_zeroize( entry_prv,
+ sizeof( mbedtls_x509_crl_entry ) );
+ mbedtls_free( entry_prv );
+ }
+
+ if( crl_cur->raw.p != NULL )
+ {
+ mbedtls_platform_zeroize( crl_cur->raw.p, crl_cur->raw.len );
+ mbedtls_free( crl_cur->raw.p );
+ }
+
+ crl_cur = crl_cur->next;
+ }
+ while( crl_cur != NULL );
+
+ crl_cur = crl;
+ do
+ {
+ crl_prv = crl_cur;
+ crl_cur = crl_cur->next;
+
+ mbedtls_platform_zeroize( crl_prv, sizeof( mbedtls_x509_crl ) );
+ if( crl_prv != crl )
+ mbedtls_free( crl_prv );
+ }
+ while( crl_cur != NULL );
+}
+
+#endif /* MBEDTLS_X509_CRL_PARSE_C */
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