/*
* Time ::= CHOICE {
* utcTime UTCTime,
* generalTime GeneralizedTime }
*/
int x509_get_time( unsigned char **p, const unsigned char *end,
x509_time *time )
{
int ret;
size_t len;
unsigned char tag;
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_X509_INVALID_DATE +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
tag = **p;
if( tag == ASN1_UTC_TIME )
{
(*p)++;
ret = asn1_get_len( p, end, &len );
if( ret != 0 )
return( POLARSSL_ERR_X509_INVALID_DATE + ret );
CHECK( x509_parse_int( p, 2, &time->year ) );
CHECK( x509_parse_int( p, 2, &time->mon ) );
CHECK( x509_parse_int( p, 2, &time->day ) );
CHECK( x509_parse_int( p, 2, &time->hour ) );
CHECK( x509_parse_int( p, 2, &time->min ) );
if( len > 10 )
CHECK( x509_parse_int( p, 2, &time->sec ) );
if( len > 12 && *(*p)++ != 'Z' )
return( POLARSSL_ERR_X509_INVALID_DATE );
time->year += 100 * ( time->year < 50 );
time->year += 1900;
return( 0 );
}
else if( tag == ASN1_GENERALIZED_TIME )
{
(*p)++;
ret = asn1_get_len( p, end, &len );
if( ret != 0 )
return( POLARSSL_ERR_X509_INVALID_DATE + ret );
CHECK( x509_parse_int( p, 4, &time->year ) );
CHECK( x509_parse_int( p, 2, &time->mon ) );
CHECK( x509_parse_int( p, 2, &time->day ) );
CHECK( x509_parse_int( p, 2, &time->hour ) );
CHECK( x509_parse_int( p, 2, &time->min ) );
if( len > 12 )
CHECK( x509_parse_int( p, 2, &time->sec ) );
if( len > 14 && *(*p)++ != 'Z' )
return( POLARSSL_ERR_X509_INVALID_DATE );
return( 0 );
}
else
return( POLARSSL_ERR_X509_INVALID_DATE +
POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
}
static ssh_string asn1_get_int(ssh_buffer buffer) {
ssh_string str;
unsigned char type;
uint32_t size;
if (ssh_buffer_get_data(buffer, &type, 1) == 0 || type != ASN1_INTEGER) {
return NULL;
}
size = asn1_get_len(buffer);
if (size == 0) {
return NULL;
}
str = ssh_string_new(size);
if (str == NULL) {
return NULL;
}
if (ssh_buffer_get_data(buffer, ssh_string_data(str), size) == 0) {
ssh_string_free(str);
return NULL;
}
return str;
}
/*
* CertificateSerialNumber ::= INTEGER
*/
static int x509_get_serial( unsigned char **p,
unsigned char *end,
x509_buf *serial )
{
int ret;
if( ( end - *p ) < 1 )
return( ERR_X509_CERT_INVALID_SERIAL |
ERR_ASN1_OUT_OF_DATA );
if( **p != ( ASN1_CONTEXT_SPECIFIC | ASN1_PRIMITIVE | 2 ) &&
**p != ASN1_INTEGER )
return( ERR_X509_CERT_INVALID_SERIAL |
ERR_ASN1_UNEXPECTED_TAG );
serial->tag = *(*p)++;
if( ( ret = asn1_get_len( p, end, &serial->len ) ) != 0 )
return( ERR_X509_CERT_INVALID_SERIAL | ret );
serial->p = *p;
*p += serial->len;
return( 0 );
}
static int asn1_check_sequence(ssh_buffer buffer) {
unsigned char *j = NULL;
unsigned char tmp;
int i;
uint32_t size;
uint32_t padding;
if (ssh_buffer_get_data(buffer, &tmp, 1) == 0 || tmp != ASN1_SEQUENCE) {
return 0;
}
size = asn1_get_len(buffer);
if ((padding = ssh_buffer_get_len(buffer) - size) > 0) {
for (i = ssh_buffer_get_len(buffer) - size,
j = (unsigned char*)ssh_buffer_get(buffer) + size;
i;
i--, j++)
{
if (*j != padding) { /* padding is allowed */
return 0; /* but nothing else */
}
}
}
return 1;
}
/*
* CertificateSerialNumber ::= INTEGER
*/
static svn_error_t *
x509_get_serial(const unsigned char **p,
const unsigned char *end, x509_buf * serial)
{
svn_error_t *err;
if ((end - *p) < 1)
{
err = svn_error_create(SVN_ERR_ASN1_OUT_OF_DATA, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_SERIAL, err, NULL);
}
if (**p != (ASN1_CONTEXT_SPECIFIC | ASN1_PRIMITIVE | 2) &&
**p != ASN1_INTEGER)
{
err = svn_error_create(SVN_ERR_ASN1_UNEXPECTED_TAG, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_SERIAL, err, NULL);
}
serial->tag = *(*p)++;
err = asn1_get_len(p, end, &serial->len);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_SERIAL, err, NULL);
serial->p = *p;
*p += serial->len;
return SVN_NO_ERROR;
}
/*
* AttributeTypeAndValue ::= SEQUENCE {
* type AttributeType,
* value AttributeValue }
*
* AttributeType ::= OBJECT IDENTIFIER
*
* AttributeValue ::= ANY DEFINED BY AttributeType
*/
static svn_error_t *
x509_get_attribute(const unsigned char **p, const unsigned char *end,
x509_name *cur, apr_pool_t *result_pool)
{
svn_error_t *err;
ptrdiff_t len;
x509_buf *oid;
x509_buf *val;
err = asn1_get_tag(p, end, &len, ASN1_CONSTRUCTED | ASN1_SEQUENCE);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
end = *p + len;
oid = &cur->oid;
err = asn1_get_tag(p, end, &oid->len, ASN1_OID);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
oid->tag = ASN1_OID;
oid->p = *p;
*p += oid->len;
if ((end - *p) < 1)
{
err = svn_error_create(SVN_ERR_ASN1_OUT_OF_DATA, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
}
if (**p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING &&
**p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING &&
**p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING)
{
err = svn_error_create(SVN_ERR_ASN1_UNEXPECTED_TAG, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
}
val = &cur->val;
val->tag = *(*p)++;
err = asn1_get_len(p, end, &val->len);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
val->p = *p;
*p += val->len;
cur->next = NULL;
if (*p != end)
{
err = svn_error_create(SVN_ERR_ASN1_LENGTH_MISMATCH, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_NAME, err, NULL);
}
return SVN_NO_ERROR;
}
/*
* AttributeTypeAndValue ::= SEQUENCE {
* type AttributeType,
* value AttributeValue }
*
* AttributeType ::= OBJECT IDENTIFIER
*
* AttributeValue ::= ANY DEFINED BY AttributeType
*/
static int x509_get_attr_type_value( unsigned char **p,
const unsigned char *end,
x509_name *cur )
{
int ret;
size_t len;
x509_buf *oid;
x509_buf *val;
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
return( POLARSSL_ERR_X509_INVALID_NAME + ret );
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_X509_INVALID_NAME +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
oid = &cur->oid;
oid->tag = **p;
if( ( ret = asn1_get_tag( p, end, &oid->len, ASN1_OID ) ) != 0 )
return( POLARSSL_ERR_X509_INVALID_NAME + ret );
oid->p = *p;
*p += oid->len;
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_X509_INVALID_NAME +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
if( **p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING &&
**p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING &&
**p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING &&
**p != ASN1_BIT_STRING )
return( POLARSSL_ERR_X509_INVALID_NAME +
POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
val = &cur->val;
val->tag = *(*p)++;
if( ( ret = asn1_get_len( p, end, &val->len ) ) != 0 )
return( POLARSSL_ERR_X509_INVALID_NAME + ret );
val->p = *p;
*p += val->len;
cur->next = NULL;
return( 0 );
}
static svn_error_t *
asn1_get_tag(const unsigned char **p,
const unsigned char *end, ptrdiff_t *len, int tag)
{
if ((end - *p) < 1)
return svn_error_create(SVN_ERR_ASN1_OUT_OF_DATA, NULL, NULL);
if (**p != tag)
return svn_error_create(SVN_ERR_ASN1_UNEXPECTED_TAG, NULL, NULL);
(*p)++;
return svn_error_trace(asn1_get_len(p, end, len));
}
static int asn1_get_tag( unsigned char **p,
unsigned char *end,
int *len, int tag )
{
if( ( end - *p ) < 1 )
return( ERR_ASN1_OUT_OF_DATA );
if( **p != tag )
return( ERR_ASN1_UNEXPECTED_TAG );
(*p)++;
return( asn1_get_len( p, end, len ) );
}
int asn1_get_tag( unsigned char **p,
const unsigned char *end,
size_t *len, int tag )
{
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
if( **p != tag )
return( POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
(*p)++;
return( asn1_get_len( p, end, len ) );
}
SSL_ROM_TEXT_SECTION
int asn1_get_alg( unsigned char **p,
const unsigned char *end,
asn1_buf *alg, asn1_buf *params )
{
int ret;
size_t len;
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
return( ret );
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
alg->tag = **p;
end = *p + len;
if( ( ret = asn1_get_tag( p, end, &alg->len, ASN1_OID ) ) != 0 )
return( ret );
alg->p = *p;
*p += alg->len;
if( *p == end )
{
memset( params, 0, sizeof(asn1_buf) );
return( 0 );
}
params->tag = **p;
(*p)++;
if( ( ret = asn1_get_len( p, end, ¶ms->len ) ) != 0 )
return( ret );
params->p = *p;
*p += params->len;
if( *p != end )
return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
return( 0 );
}
static gpg_error_t
asn1_get_public_exp (unsigned char *cert, int cert_len,
unsigned char **sub_start, int *sub_len)
{
gpg_error_t err;
int len;
/* The path to the public exp entry in the DER file. This is
Sequence->Sequence->Version,Serial,AlgID,Issuer,Time,Subject,
Sequence->Sequence,Bitstring->Sequence->Integer,Integer */
struct asn1_path path[] = { { '\x30', true }, { '\x30', true },
{ '\xa0', false }, { '\x02', false },
{ '\x30', false }, { '\x30', false },
{ '\x30', false }, { '\x30', false },
{ '\x30', true }, { '\x30', false },
{ '\x03', true }, { '\x30', true },
{ '\x02', false }, { '\x02', false } };
err = asn1_get_element (cert, cert_len, sub_start, sub_len,
path, DIM (path));
if (err)
return err;
if (*sub_len < 1)
{
DEBUG (DBG_INFO, "public exponent too short");
return gpg_error (GPG_ERR_GENERAL);
}
(*sub_start)++;
(*sub_len)--;
err = asn1_get_len (sub_start, sub_len, &len);
if (err)
return err;
/* PKCS #11 expects an unsigned big integer. */
while (**sub_start == '\x00' && *sub_len > 0)
{
(*sub_start)++;
(*sub_len)--;
}
return 0;
}
/*
* SubjectAltName ::= GeneralNames
*
* GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
*
* GeneralName ::= CHOICE {
* otherName [0] OtherName,
* rfc822Name [1] IA5String,
* dNSName [2] IA5String,
* x400Address [3] ORAddress,
* directoryName [4] Name,
* ediPartyName [5] EDIPartyName,
* uniformResourceIdentifier [6] IA5String,
* iPAddress [7] OCTET STRING,
* registeredID [8] OBJECT IDENTIFIER }
*
* OtherName ::= SEQUENCE {
* type-id OBJECT IDENTIFIER,
* value [0] EXPLICIT ANY DEFINED BY type-id }
*
* EDIPartyName ::= SEQUENCE {
* nameAssigner [0] DirectoryString OPTIONAL,
* partyName [1] DirectoryString }
*
* NOTE: PolarSSL only parses and uses dNSName at this point.
*/
static int x509_get_subject_alt_name( unsigned char **p,
const unsigned char *end,
x509_sequence *subject_alt_name )
{
int ret;
size_t len, tag_len;
asn1_buf *buf;
unsigned char tag;
asn1_sequence *cur = subject_alt_name;
/* Get main sequence tag */
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS + ret );
if( *p + len != end )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS +
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
while( *p < end )
{
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
tag = **p;
(*p)++;
if( ( ret = asn1_get_len( p, end, &tag_len ) ) != 0 )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS + ret );
if( ( tag & ASN1_CONTEXT_SPECIFIC ) != ASN1_CONTEXT_SPECIFIC )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS +
POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
if( tag != ( ASN1_CONTEXT_SPECIFIC | 2 ) )
{
*p += tag_len;
continue;
}
buf = &(cur->buf);
buf->tag = tag;
buf->p = *p;
buf->len = tag_len;
*p += buf->len;
/* Allocate and assign next pointer */
if (*p < end)
{
cur->next = (asn1_sequence *) polarssl_malloc(
sizeof( asn1_sequence ) );
if( cur->next == NULL )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS +
POLARSSL_ERR_ASN1_MALLOC_FAILED );
memset( cur->next, 0, sizeof( asn1_sequence ) );
cur = cur->next;
}
}
/* Set final sequence entry's next pointer to NULL */
cur->next = NULL;
if( *p != end )
return( POLARSSL_ERR_X509_INVALID_EXTENSIONS +
POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
return( 0 );
}
static gpg_error_t
asn1_get_element (unsigned char *cert, int cert_len,
unsigned char **sub_start, int *sub_len,
struct asn1_path *path, int path_size)
{
gpg_error_t err;
unsigned char *prev_certp = NULL;
unsigned char *certp = cert;
int cert_left = cert_len;
int len;
int i;
for (i = 0; i < path_size; i++)
{
prev_certp = certp;
if (cert_left < 1)
{
DEBUG (DBG_INFO, "unexpected end of certificate");
return gpg_error (GPG_ERR_GENERAL);
}
if (*certp != path[i].tag)
{
DEBUG (DBG_INFO, "wrong element in lookup path");
return gpg_error (GPG_ERR_GENERAL);
}
certp++;
cert_left--;
err = asn1_get_len (&certp, &cert_left, &len);
if (err)
return err;
if (!path[i].enter)
{
if (cert_left < len)
{
DEBUG (DBG_INFO, "unexpected end of certificate");
return gpg_error (GPG_ERR_GENERAL);
}
certp += len;
cert_left -= len;
}
else
{
/* Special code to deal with ASN.1 data encapsulated in a
bit string. */
if (path[i].tag == '\x03')
{
if (cert_left < 1)
{
DEBUG (DBG_INFO, "unexpected end of certificate");
return gpg_error (GPG_ERR_GENERAL);
}
if (*certp != '\x00')
{
DEBUG (DBG_INFO, "expected binary encapsulation missing");
return gpg_error (GPG_ERR_GENERAL);
}
certp++;
cert_left--;
}
}
}
/* We found the subject. */
*sub_start = prev_certp;
*sub_len = certp - prev_certp;
return 0;
}
/*
* X.509 v3 extensions (not parsed)
*/
static svn_error_t *
x509_get_ext(apr_array_header_t *dnsnames,
const unsigned char **p,
const unsigned char *end)
{
svn_error_t *err;
ptrdiff_t len;
if (*p == end)
return SVN_NO_ERROR;
err = asn1_get_tag(p, end, &len,
ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 3);
if (err)
{
/* If there aren't extensions that's ok they aren't required */
if (err->apr_err == SVN_ERR_ASN1_UNEXPECTED_TAG)
{
svn_error_clear(err);
return SVN_NO_ERROR;
}
return svn_error_trace(err);
}
end = *p + len;
SVN_ERR(asn1_get_tag(p, end, &len, ASN1_CONSTRUCTED | ASN1_SEQUENCE));
if (end != *p + len)
{
err = svn_error_create(SVN_ERR_ASN1_LENGTH_MISMATCH, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err, NULL);
}
while (*p < end)
{
ptrdiff_t ext_len;
const unsigned char *ext_start, *sna_end;
err = asn1_get_tag(p, end, &ext_len, ASN1_CONSTRUCTED | ASN1_SEQUENCE);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err,
NULL);
ext_start = *p;
err = asn1_get_tag(p, end, &len, ASN1_OID);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err,
NULL);
/* skip all extensions except SubjectAltName */
if (!equal(*p, len,
OID_SUBJECT_ALT_NAME, sizeof(OID_SUBJECT_ALT_NAME) - 1))
{
*p += ext_len - (*p - ext_start);
continue;
}
*p += len;
err = asn1_get_tag(p, end, &len, ASN1_OCTET_STRING);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err,
NULL);
/* SubjectAltName ::= GeneralNames
GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
GeneralName ::= CHOICE {
other Name [0] OtherName,
rfc822Name [1] IA5String,
dNSName [2] IA5String,
x400Address [3] ORAddress,
directoryName [4] Name,
ediPartyName [5] EDIPartyName,
uniformResourceIdentifier [6] IA5String,
iPAddress [7] OCTET STRING,
registeredID [8] OBJECT IDENTIFIER } */
sna_end = *p + len;
err = asn1_get_tag(p, sna_end, &len, ASN1_CONSTRUCTED | ASN1_SEQUENCE);
if (err)
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err,
NULL);
if (sna_end != *p + len)
{
err = svn_error_create(SVN_ERR_ASN1_LENGTH_MISMATCH, NULL, NULL);
return svn_error_create(SVN_ERR_X509_CERT_INVALID_EXTENSIONS, err, NULL);
}
while (*p < sna_end)
{
err = asn1_get_tag(p, sna_end, &len, ASN1_CONTEXT_SPECIFIC |
ASN1_PRIMITIVE | 2);
if (err)
{
/* not not a dNSName */
if (err->apr_err == SVN_ERR_ASN1_UNEXPECTED_TAG)
{
svn_error_clear(err);
/* need to skip the tag and then find the length to
* skip to ignore this SNA entry. */
(*p)++;
SVN_ERR(asn1_get_len(p, sna_end, &len));
*p += len;
continue;
}
return svn_error_trace(err);
}
else
{
/* We found a dNSName entry */
x509_buf *dnsname = apr_palloc(dnsnames->pool, sizeof(*dnsname));
dnsname->tag = ASN1_IA5_STRING; /* implicit based on dNSName */
dnsname->len = len;
dnsname->p = *p;
APR_ARRAY_PUSH(dnsnames, x509_buf *) = dnsname;
}
*p += len;
}
}
return SVN_NO_ERROR;
}
/*
* RelativeDistinguishedName ::=
* SET OF AttributeTypeAndValue
*
* AttributeTypeAndValue ::= SEQUENCE {
* type AttributeType,
* value AttributeValue }
*
* AttributeType ::= OBJECT IDENTIFIER
*
* AttributeValue ::= ANY DEFINED BY AttributeType
*/
static int x509_get_name( unsigned char **p,
unsigned char *end,
x509_name *cur )
{
int ret, len;
unsigned char *end2;
x509_buf *oid;
x509_buf *val;
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SET ) ) != 0 )
return( ERR_X509_CERT_INVALID_NAME | ret );
end2 = end;
end = *p + len;
if( ( ret = asn1_get_tag( p, end, &len,
ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
return( ERR_X509_CERT_INVALID_NAME | ret );
if( *p + len != end )
return( ERR_X509_CERT_INVALID_NAME |
ERR_ASN1_LENGTH_MISMATCH );
oid = &cur->oid;
oid->tag = **p;
if( ( ret = asn1_get_tag( p, end, &oid->len, ASN1_OID ) ) != 0 )
return( ERR_X509_CERT_INVALID_NAME | ret );
oid->p = *p;
*p += oid->len;
if( ( end - *p ) < 1 )
return( ERR_X509_CERT_INVALID_NAME |
ERR_ASN1_OUT_OF_DATA );
if( **p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING &&
**p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING &&
**p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING )
return( ERR_X509_CERT_INVALID_NAME |
ERR_ASN1_UNEXPECTED_TAG );
val = &cur->val;
val->tag = *(*p)++;
if( ( ret = asn1_get_len( p, end, &val->len ) ) != 0 )
return( ERR_X509_CERT_INVALID_NAME | ret );
val->p = *p;
*p += val->len;
cur->next = NULL;
if( *p != end )
return( ERR_X509_CERT_INVALID_NAME |
ERR_ASN1_LENGTH_MISMATCH );
/*
* recurse until end of SEQUENCE is reached
*/
if( *p == end2 )
return( 0 );
cur->next = (x509_name *) malloc(
sizeof( x509_name ) );
if( cur->next == NULL )
return( 1 );
return( x509_get_name( p, end2, cur->next ) );
}
/*
* Time ::= CHOICE {
* utcTime UTCTime,
* generalTime GeneralizedTime }
*/
int x509_get_time( unsigned char **p, const unsigned char *end,
x509_time *time )
{
int ret;
size_t len;
char date[64];
unsigned char tag;
if( ( end - *p ) < 1 )
return( POLARSSL_ERR_X509_INVALID_DATE +
POLARSSL_ERR_ASN1_OUT_OF_DATA );
tag = **p;
if( tag == ASN1_UTC_TIME )
{
(*p)++;
ret = asn1_get_len( p, end, &len );
if( ret != 0 )
return( POLARSSL_ERR_X509_INVALID_DATE + ret );
memset( date, 0, sizeof( date ) );
memcpy( date, *p, ( len < sizeof( date ) - 1 ) ?
len : sizeof( date ) - 1 );
if( sscanf( date, "%2d%2d%2d%2d%2d%2dZ",
&time->year, &time->mon, &time->day,
&time->hour, &time->min, &time->sec ) < 5 )
return( POLARSSL_ERR_X509_INVALID_DATE );
time->year += 100 * ( time->year < 50 );
time->year += 1900;
*p += len;
return( 0 );
}
else if( tag == ASN1_GENERALIZED_TIME )
{
(*p)++;
ret = asn1_get_len( p, end, &len );
if( ret != 0 )
return( POLARSSL_ERR_X509_INVALID_DATE + ret );
memset( date, 0, sizeof( date ) );
memcpy( date, *p, ( len < sizeof( date ) - 1 ) ?
len : sizeof( date ) - 1 );
if( sscanf( date, "%4d%2d%2d%2d%2d%2dZ",
&time->year, &time->mon, &time->day,
&time->hour, &time->min, &time->sec ) < 5 )
return( POLARSSL_ERR_X509_INVALID_DATE );
*p += len;
return( 0 );
}
else
return( POLARSSL_ERR_X509_INVALID_DATE +
POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
}
