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x509_verify() now case insensitive for cn (RFC 6125 6.4)

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This commit is contained in:
Paul Bakker 2013-09-09 17:21:45 +02:00
parent 9f5a3c4a0a
commit a5943858d8
3 changed files with 30 additions and 6 deletions
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1
ChangeLog
View File

@ -40,6 +40,7 @@ Changes
(Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC)
* SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly
* All RSA operations require a random generator for blinding purposes
* x509_verify() now case insensitive for cn (RFC 6125 6.4)
Bugfix
* Fixed parse error in ssl_parse_certificate_request()

31
library/x509parse.c
View File

@ -3457,6 +3457,29 @@ static int x509parse_verifycrl(x509_cert *crt, x509_cert *ca,
return flags;
}
// Equal == 0, inequal == 1
static int x509_name_cmp( const void *s1, const void *s2, size_t len )
{
size_t i;
unsigned char diff;
const unsigned char *n1 = s1, *n2 = s2;
for( i = 0; i < len; i++ )
{
diff = n1[i] ^ n2[i];
if( ( n1[i] >= 'a' || n1[i] <= 'z' ) && ( diff == 0 || diff == 32 ) )
continue;
if( ( n1[i] >= 'A' || n1[i] <= 'Z' ) && ( diff == 0 || diff == 32 ) )
continue;
return( 1 );
}
return( 0 );
}
static int x509_wildcard_verify( const char *cn, x509_buf *name )
{
size_t i;
@ -3478,7 +3501,7 @@ static int x509_wildcard_verify( const char *cn, x509_buf *name )
return( 0 );
if( strlen( cn ) - cn_idx == name->len - 1 &&
memcmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
x509_name_cmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
{
return( 1 );
}
@ -3657,7 +3680,7 @@ static int x509parse_verify_child(
ret = x509parse_verify_child( parent, grandparent, trust_ca, ca_crl, path_cnt + 1, &parent_flags, f_vrfy, p_vrfy );
if( ret != 0 )
return( ret );
}
}
else
{
ret = x509parse_verify_top( parent, trust_ca, ca_crl, path_cnt + 1, &parent_flags, f_vrfy, p_vrfy );
@ -3706,7 +3729,7 @@ int x509parse_verify( x509_cert *crt,
while( cur != NULL )
{
if( cur->buf.len == cn_len &&
memcmp( cn, cur->buf.p, cn_len ) == 0 )
x509_name_cmp( cn, cur->buf.p, cn_len ) == 0 )
break;
if( cur->buf.len > 2 &&
@ -3727,7 +3750,7 @@ int x509parse_verify( x509_cert *crt,
if( OID_CMP( OID_AT_CN, &name->oid ) )
{
if( name->val.len == cn_len &&
memcmp( name->val.p, cn, cn_len ) == 0 )
x509_name_cmp( name->val.p, cn, cn_len ) == 0 )
break;
if( name->val.len > 2 &&

4
tests/suites/test_suite_x509parse.data
View File

@ -418,9 +418,9 @@ X509 Certificate verification #19 (Not trusted Cert, allowing callback)
depends_on:POLARSSL_PEM_C:POLARSSL_FS_IO:POLARSSL_RSA_C:POLARSSL_PKCS1_V15
x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":"NULL":0:0:"verify_all"
X509 Certificate verification #21 (domain matching wildcard certificate)
X509 Certificate verification #21 (domain matching wildcard certificate, case insensitive)
depends_on:POLARSSL_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA1_C:POLARSSL_RSA_C:POLARSSL_PKCS1_V15
x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.example.com":0:0:"NULL"
x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.ExAmPlE.com":0:0:"NULL"
X509 Certificate verification #22 (domain not matching wildcard certificate)
depends_on:POLARSSL_PEM_C:POLARSSL_FS_IO:POLARSSL_SHA1_C:POLARSSL_RSA_C:POLARSSL_PKCS1_V15