diff options
Diffstat (limited to 'thirdparty/mbedtls/library/x509.c')
| -rw-r--r-- | thirdparty/mbedtls/library/x509.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/thirdparty/mbedtls/library/x509.c b/thirdparty/mbedtls/library/x509.c index f21e9e6944..3997ebd1f3 100644 --- a/thirdparty/mbedtls/library/x509.c +++ b/thirdparty/mbedtls/library/x509.c @@ -741,7 +741,7 @@ int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end, int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t i, n; + size_t i, j, n; unsigned char c, merge = 0; const mbedtls_x509_name *name; const char *short_name = NULL; @@ -775,17 +775,24 @@ int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn ) ret = mbedtls_snprintf( p, n, "\?\?=" ); MBEDTLS_X509_SAFE_SNPRINTF; - for( i = 0; i < name->val.len; i++ ) + for( i = 0, j = 0; i < name->val.len; i++, j++ ) { - if( i >= sizeof( s ) - 1 ) - break; + if( j >= sizeof( s ) - 1 ) + return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL ); c = name->val.p[i]; + // Special characters requiring escaping, RFC 1779 + if( c && strchr( ",=+<>#;\"\\", c ) ) + { + if( j + 1 >= sizeof( s ) - 1 ) + return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL ); + s[j++] = '\\'; + } if( c < 32 || c >= 127 ) - s[i] = '?'; - else s[i] = c; + s[j] = '?'; + else s[j] = c; } - s[i] = '\0'; + s[j] = '\0'; ret = mbedtls_snprintf( p, n, "%s", s ); MBEDTLS_X509_SAFE_SNPRINTF; |