From a8b13d79bf9c61793b6e946d03b35c67f5769acc Mon Sep 17 00:00:00 2001 From: Hanno Becker Date: Fri, 2 Nov 2018 10:09:48 +0000 Subject: [PATCH 1/4] Add tests for relaxed CRL-CA name comparison This commit introduces variants test-ca_utf8.crt, test-ca_printablestring.crt and test-ca_uppercase.crt of tests/data_files/test-ca.crt which differ from test-ca.crt in their choice of string encoding and upper and lower case letters in the DN field. These changes should be immaterial to the recovation check, and three tests are added that crl.pem, which applies to test-ca.crt, is also considered as applying to test-ca_*.crt. The test files were generated using PR #1641 which - adds a build instruction for test-ca.crt to tests/data_files/Makefile which allows easy change of the subject DN. - changes the default string format from `PrintableString` to `UTF8String`. Specifically: - `test-ca_utf8.crt` was generated by running `rm test-ca.crt && make test-ca.crt` on PR #1641. - `test-ca_uppercase.crt`, too, was generated by running `rm test-ca.crt && make test-ca.crt` on PR #1641, after modifying the subject DN line in the build instruction for `test-ca.crt` in `tests/data_files/Makefile`. - `test-ca_printable.crt` is a copy of `test-ca.crt` because at the time of this commit, `PrintableString` is still the default string format. --- tests/data_files/test-ca_printable.crt | 21 +++++++++++++++++++++ tests/data_files/test-ca_uppercase.crt | 20 ++++++++++++++++++++ tests/data_files/test-ca_utf8.crt | 20 ++++++++++++++++++++ tests/suites/test_suite_x509parse.data | 12 ++++++++++++ 4 files changed, 73 insertions(+) create mode 100644 tests/data_files/test-ca_printable.crt create mode 100644 tests/data_files/test-ca_uppercase.crt create mode 100644 tests/data_files/test-ca_utf8.crt diff --git a/tests/data_files/test-ca_printable.crt b/tests/data_files/test-ca_printable.crt new file mode 100644 index 000000000..d16da09a2 --- /dev/null +++ b/tests/data_files/test-ca_printable.crt @@ -0,0 +1,21 @@ +-----BEGIN CERTIFICATE----- +MIIDhzCCAm+gAwIBAgIBADANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER +MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN +MTEwMjEyMTQ0NDAwWhcNMjEwMjEyMTQ0NDAwWjA7MQswCQYDVQQGEwJOTDERMA8G +A1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwggEiMA0G +CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDA3zf8F7vglp0/ht6WMn1EpRagzSHx +mdTs6st8GFgIlKXsm8WL3xoemTiZhx57wI053zhdcHgH057Zk+i5clHFzqMwUqny +50BwFMtEonILwuVA+T7lpg6z+exKY8C4KQB0nFc7qKUEkHHxvYPZP9al4jwqj+8n +YMPGn8u67GB9t+aEMr5P+1gmIgNb1LTV+/Xjli5wwOQuvfwu7uJBVcA0Ln0kcmnL +R7EUQIN9Z/SG9jGr8XmksrUuEvmEF/Bibyc+E1ixVA0hmnM3oTDPb5Lc9un8rNsu +KNF+AksjoBXyOGVkCeoMbo4bF6BxyLObyavpw/LPh5aPgAIynplYb6LVAgMBAAGj +gZUwgZIwDAYDVR0TBAUwAwEB/zAdBgNVHQ4EFgQUtFrkpbPe0lL2udWmlQ/rPrzH +/f8wYwYDVR0jBFwwWoAUtFrkpbPe0lL2udWmlQ/rPrzH/f+hP6Q9MDsxCzAJBgNV +BAYTAk5MMREwDwYDVQQKEwhQb2xhclNTTDEZMBcGA1UEAxMQUG9sYXJTU0wgVGVz +dCBDQYIBADANBgkqhkiG9w0BAQUFAAOCAQEAuP1U2ABUkIslsCfdlc2i94QHHYeJ +SsR4EdgHtdciUI5I62J6Mom+Y0dT/7a+8S6MVMCZP6C5NyNyXw1GWY/YR82XTJ8H +DBJiCTok5DbZ6SzaONBzdWHXwWwmi5vg1dxn7YxrM9d0IjxM27WNKs4sDQhZBQkF +pjmfs2cb4oPl4Y9T9meTx/lvdkRYEug61Jfn6cA+qHpyPYdTH+UshITnmp5/Ztkf +m/UTSLBNFNHesiTZeH31NcxYGdHSme9Nc/gfidRa0FLOCfWxRlFqAI47zG9jAQCZ +7Z2mCGDNMhjQc+BYcdnl0lPXjdDK6V0qCg1dVewhUBcW5gZKzV7e9+DpVA== +-----END CERTIFICATE----- diff --git a/tests/data_files/test-ca_uppercase.crt b/tests/data_files/test-ca_uppercase.crt new file mode 100644 index 000000000..e8b537c72 --- /dev/null +++ b/tests/data_files/test-ca_uppercase.crt @@ -0,0 +1,20 @@ +-----BEGIN CERTIFICATE----- +MIIDQTCCAimgAwIBAgIBAzANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER +MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN +MTEwMjEyMTQ0NDAwWhcNMjEwMjEyMTQ0NDAwWjA7MQswCQYDVQQGEwJOTDERMA8G +A1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwggEiMA0G +CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDA3zf8F7vglp0/ht6WMn1EpRagzSHx +mdTs6st8GFgIlKXsm8WL3xoemTiZhx57wI053zhdcHgH057Zk+i5clHFzqMwUqny +50BwFMtEonILwuVA+T7lpg6z+exKY8C4KQB0nFc7qKUEkHHxvYPZP9al4jwqj+8n +YMPGn8u67GB9t+aEMr5P+1gmIgNb1LTV+/Xjli5wwOQuvfwu7uJBVcA0Ln0kcmnL +R7EUQIN9Z/SG9jGr8XmksrUuEvmEF/Bibyc+E1ixVA0hmnM3oTDPb5Lc9un8rNsu +KNF+AksjoBXyOGVkCeoMbo4bF6BxyLObyavpw/LPh5aPgAIynplYb6LVAgMBAAGj +UDBOMAwGA1UdEwQFMAMBAf8wHQYDVR0OBBYEFLRa5KWz3tJS9rnVppUP6z68x/3/ +MB8GA1UdIwQYMBaAFLRa5KWz3tJS9rnVppUP6z68x/3/MA0GCSqGSIb3DQEBBQUA +A4IBAQABE3OEPfEd/bcJW5ZdU3/VgPNS4tMzh8gnJP/V2FcvFtGylMpQq6YnEBYI +yBHAL4DRvlMY5rnXGBp3ODR8MpqHC6AquRTCLzjS57iYff//4QFQqW9n92zctspv +czkaPKgjqo1No3Uq0Xaz10rcxyTUPrf5wNVRZ2V0KvllvAAVSzbI4mpdUXztjhST +S5A2BeWQAAOr0zq1F7TSRVJpJs7jmB2ai/igkh1IAjcuwV6VwlP+sbw0gjQ0NpGM +iHpnlzRAi/tIbtOvMIGOBU2TIfax/5jq1agUx5aPmT5TWAiJPOOP6l5xXnDwxeYS +NWqiX9GyusBZjezaCaHabjDLU0qQ +-----END CERTIFICATE----- diff --git a/tests/data_files/test-ca_utf8.crt b/tests/data_files/test-ca_utf8.crt new file mode 100644 index 000000000..e8b537c72 --- /dev/null +++ b/tests/data_files/test-ca_utf8.crt @@ -0,0 +1,20 @@ +-----BEGIN CERTIFICATE----- +MIIDQTCCAimgAwIBAgIBAzANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER +MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN +MTEwMjEyMTQ0NDAwWhcNMjEwMjEyMTQ0NDAwWjA7MQswCQYDVQQGEwJOTDERMA8G +A1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwggEiMA0G +CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDA3zf8F7vglp0/ht6WMn1EpRagzSHx +mdTs6st8GFgIlKXsm8WL3xoemTiZhx57wI053zhdcHgH057Zk+i5clHFzqMwUqny +50BwFMtEonILwuVA+T7lpg6z+exKY8C4KQB0nFc7qKUEkHHxvYPZP9al4jwqj+8n +YMPGn8u67GB9t+aEMr5P+1gmIgNb1LTV+/Xjli5wwOQuvfwu7uJBVcA0Ln0kcmnL +R7EUQIN9Z/SG9jGr8XmksrUuEvmEF/Bibyc+E1ixVA0hmnM3oTDPb5Lc9un8rNsu +KNF+AksjoBXyOGVkCeoMbo4bF6BxyLObyavpw/LPh5aPgAIynplYb6LVAgMBAAGj +UDBOMAwGA1UdEwQFMAMBAf8wHQYDVR0OBBYEFLRa5KWz3tJS9rnVppUP6z68x/3/ +MB8GA1UdIwQYMBaAFLRa5KWz3tJS9rnVppUP6z68x/3/MA0GCSqGSIb3DQEBBQUA +A4IBAQABE3OEPfEd/bcJW5ZdU3/VgPNS4tMzh8gnJP/V2FcvFtGylMpQq6YnEBYI +yBHAL4DRvlMY5rnXGBp3ODR8MpqHC6AquRTCLzjS57iYff//4QFQqW9n92zctspv +czkaPKgjqo1No3Uq0Xaz10rcxyTUPrf5wNVRZ2V0KvllvAAVSzbI4mpdUXztjhST +S5A2BeWQAAOr0zq1F7TSRVJpJs7jmB2ai/igkh1IAjcuwV6VwlP+sbw0gjQ0NpGM +iHpnlzRAi/tIbtOvMIGOBU2TIfax/5jq1agUx5aPmT5TWAiJPOOP6l5xXnDwxeYS +NWqiX9GyusBZjezaCaHabjDLU0qQ +-----END CERTIFICATE----- diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data index 80e49d226..85f0d6556 100644 --- a/tests/suites/test_suite_x509parse.data +++ b/tests/suites/test_suite_x509parse.data @@ -399,6 +399,18 @@ X509 Certificate verification #5 (Revoked Cert) depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_HAVE_TIME_DATE x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL" +X509 Certificate verification #5' (Revoked Cert, differing DN string formats #1) +depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_HAVE_TIME_DATE +x509_verify:"data_files/server1.crt":"data_files/test-ca_utf8.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL" + +X509 Certificate verification #5'' (Revoked Cert, differing DN string formats #2) +depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_HAVE_TIME_DATE +x509_verify:"data_files/server1.crt":"data_files/test-ca_printable.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL" + +X509 Certificate verification #5''' (Revoked Cert, differing upper and lower case) +depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_HAVE_TIME_DATE +x509_verify:"data_files/server1.crt":"data_files/test-ca_uppercase.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL" + X509 Certificate verification #6 (Revoked Cert) depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_HAVE_TIME_DATE x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Server 1":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL" From 1f8527f1cf1c2137c67b87cdcd50e85cc6109137 Mon Sep 17 00:00:00 2001 From: Hanno Becker Date: Fri, 2 Nov 2018 09:19:16 +0000 Subject: [PATCH 2/4] Move static x509_name_cmp() in library/x509_crt.c A subsequent change will need this function earlier within the file. --- library/x509_crt.c | 260 ++++++++++++++++++++++----------------------- 1 file changed, 130 insertions(+), 130 deletions(-) diff --git a/library/x509_crt.c b/library/x509_crt.c index 25aaff3b0..f75684372 100644 --- a/library/x509_crt.c +++ b/library/x509_crt.c @@ -227,6 +227,136 @@ static int x509_profile_check_key( const mbedtls_x509_crt_profile *profile, return( -1 ); } +/* + * Like memcmp, but case-insensitive and always returns -1 if different + */ +static int x509_memcasecmp( 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( diff == 0 ) + continue; + + if( diff == 32 && + ( ( n1[i] >= 'a' && n1[i] <= 'z' ) || + ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) ) + { + continue; + } + + return( -1 ); + } + + return( 0 ); +} + +/* + * Return 0 if name matches wildcard, -1 otherwise + */ +static int x509_check_wildcard( const char *cn, const mbedtls_x509_buf *name ) +{ + size_t i; + size_t cn_idx = 0, cn_len = strlen( cn ); + + /* We can't have a match if there is no wildcard to match */ + if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' ) + return( -1 ); + + for( i = 0; i < cn_len; ++i ) + { + if( cn[i] == '.' ) + { + cn_idx = i; + break; + } + } + + if( cn_idx == 0 ) + return( -1 ); + + if( cn_len - cn_idx == name->len - 1 && + x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 ) + { + return( 0 ); + } + + return( -1 ); +} + +/* + * Compare two X.509 strings, case-insensitive, and allowing for some encoding + * variations (but not all). + * + * Return 0 if equal, -1 otherwise. + */ +static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b ) +{ + if( a->tag == b->tag && + a->len == b->len && + memcmp( a->p, b->p, b->len ) == 0 ) + { + return( 0 ); + } + + if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) && + ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) && + a->len == b->len && + x509_memcasecmp( a->p, b->p, b->len ) == 0 ) + { + return( 0 ); + } + + return( -1 ); +} + +/* + * Compare two X.509 Names (aka rdnSequence). + * + * See RFC 5280 section 7.1, though we don't implement the whole algorithm: + * we sometimes return unequal when the full algorithm would return equal, + * but never the other way. (In particular, we don't do Unicode normalisation + * or space folding.) + * + * Return 0 if equal, -1 otherwise. + */ +static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b ) +{ + /* Avoid recursion, it might not be optimised by the compiler */ + while( a != NULL || b != NULL ) + { + if( a == NULL || b == NULL ) + return( -1 ); + + /* type */ + if( a->oid.tag != b->oid.tag || + a->oid.len != b->oid.len || + memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 ) + { + return( -1 ); + } + + /* value */ + if( x509_string_cmp( &a->val, &b->val ) != 0 ) + return( -1 ); + + /* structure of the list of sets */ + if( a->next_merged != b->next_merged ) + return( -1 ); + + a = a->next; + b = b->next; + } + + /* a == NULL == b */ + return( 0 ); +} + /* * Reset (init or clear) a verify_chain */ @@ -1756,136 +1886,6 @@ static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca, } #endif /* MBEDTLS_X509_CRL_PARSE_C */ -/* - * Like memcmp, but case-insensitive and always returns -1 if different - */ -static int x509_memcasecmp( 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( diff == 0 ) - continue; - - if( diff == 32 && - ( ( n1[i] >= 'a' && n1[i] <= 'z' ) || - ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) ) - { - continue; - } - - return( -1 ); - } - - return( 0 ); -} - -/* - * Return 0 if name matches wildcard, -1 otherwise - */ -static int x509_check_wildcard( const char *cn, const mbedtls_x509_buf *name ) -{ - size_t i; - size_t cn_idx = 0, cn_len = strlen( cn ); - - /* We can't have a match if there is no wildcard to match */ - if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' ) - return( -1 ); - - for( i = 0; i < cn_len; ++i ) - { - if( cn[i] == '.' ) - { - cn_idx = i; - break; - } - } - - if( cn_idx == 0 ) - return( -1 ); - - if( cn_len - cn_idx == name->len - 1 && - x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 ) - { - return( 0 ); - } - - return( -1 ); -} - -/* - * Compare two X.509 strings, case-insensitive, and allowing for some encoding - * variations (but not all). - * - * Return 0 if equal, -1 otherwise. - */ -static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b ) -{ - if( a->tag == b->tag && - a->len == b->len && - memcmp( a->p, b->p, b->len ) == 0 ) - { - return( 0 ); - } - - if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) && - ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) && - a->len == b->len && - x509_memcasecmp( a->p, b->p, b->len ) == 0 ) - { - return( 0 ); - } - - return( -1 ); -} - -/* - * Compare two X.509 Names (aka rdnSequence). - * - * See RFC 5280 section 7.1, though we don't implement the whole algorithm: - * we sometimes return unequal when the full algorithm would return equal, - * but never the other way. (In particular, we don't do Unicode normalisation - * or space folding.) - * - * Return 0 if equal, -1 otherwise. - */ -static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b ) -{ - /* Avoid recursion, it might not be optimised by the compiler */ - while( a != NULL || b != NULL ) - { - if( a == NULL || b == NULL ) - return( -1 ); - - /* type */ - if( a->oid.tag != b->oid.tag || - a->oid.len != b->oid.len || - memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 ) - { - return( -1 ); - } - - /* value */ - if( x509_string_cmp( &a->val, &b->val ) != 0 ) - return( -1 ); - - /* structure of the list of sets */ - if( a->next_merged != b->next_merged ) - return( -1 ); - - a = a->next; - b = b->next; - } - - /* a == NULL == b */ - return( 0 ); -} - /* * Check the signature of a certificate by its parent */ From b75ffb5061a732a6869b87bd50dac58986f15486 Mon Sep 17 00:00:00 2001 From: Hanno Becker Date: Fri, 2 Nov 2018 09:19:54 +0000 Subject: [PATCH 3/4] Don't perform binary comparison of CRL issuer and CA subject Previously, when checking whether a CRT was revoked through one of the configured CRLs, the library would only consider those CRLs whose `issuer` field binary-matches the `subject` field of the CA that has issued the CRT in question. If those fields were not binary equivalent, the corresponding CRL was discarded. This is not in line with RFC 5280, which demands that the comparison should be format- and case-insensitive. For example: - If the same string is once encoded as a `PrintableString` and another time as a `UTF8String`, they should compare equal. - If two strings differ only in their choice of upper and lower case letters, they should compare equal. This commit fixes this by using the dedicated x509_name_cmp() function to compare the CRL issuer with the CA subject. Fixes #1784. --- library/x509_crt.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/library/x509_crt.c b/library/x509_crt.c index f75684372..97a4bbf24 100644 --- a/library/x509_crt.c +++ b/library/x509_crt.c @@ -1814,9 +1814,7 @@ static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca, while( crl_list != NULL ) { if( crl_list->version == 0 || - crl_list->issuer_raw.len != ca->subject_raw.len || - memcmp( crl_list->issuer_raw.p, ca->subject_raw.p, - crl_list->issuer_raw.len ) != 0 ) + x509_name_cmp( &crl_list->issuer, &ca->subject ) != 0 ) { crl_list = crl_list->next; continue; @@ -1826,7 +1824,8 @@ static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca, * Check if the CA is configured to sign CRLs */ #if defined(MBEDTLS_X509_CHECK_KEY_USAGE) - if( mbedtls_x509_crt_check_key_usage( ca, MBEDTLS_X509_KU_CRL_SIGN ) != 0 ) + if( mbedtls_x509_crt_check_key_usage( ca, + MBEDTLS_X509_KU_CRL_SIGN ) != 0 ) { flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED; break; From d3445da3eff6351339e7c0be8ff0c147152f82f3 Mon Sep 17 00:00:00 2001 From: Hanno Becker Date: Fri, 2 Nov 2018 09:36:45 +0000 Subject: [PATCH 4/4] Adapt ChangeLog --- ChangeLog | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/ChangeLog b/ChangeLog index 7e1955ae1..b88599895 100644 --- a/ChangeLog +++ b/ChangeLog @@ -2,6 +2,15 @@ mbed TLS ChangeLog (Sorted per branch, date) = mbed TLS x.x.x branch released xxxx-xx-xx +Security + * Fix overly strict DN comparison when looking for CRLs + belonging to a particular CA. This previously lead to + ignoring CRLs when the CRL's issuer name and the CA's + subject name differed in their string encoding (e.g., + one using PrintableString and the other UTF8String) or + in the choice of upper and lower case. Reported by + HenrikRosenquistAndersson in #1784. + Features * Add support for temporarily suspending expensive ECC computations after some configurable amount of operations, to be used in single-threaded