From f5e4b6b5b566320a8d774f9475540f7d0e6a704d Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Wed, 17 Dec 2014 14:34:36 +0000 Subject: [PATCH] Reject invalid constructed encodings. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit According to X6.90 null, object identifier, boolean, integer and enumerated types can only have primitive encodings: return an error if any of these are received with a constructed encoding. Reviewed-by: Emilia Käsper --- crypto/asn1/asn1.h | 1 + crypto/asn1/asn1_err.c | 3 ++- crypto/asn1/tasn_dec.c | 8 ++++++++ 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/crypto/asn1/asn1.h b/crypto/asn1/asn1.h index 1e59ee0dd7..b57e2cdc52 100644 --- a/crypto/asn1/asn1.h +++ b/crypto/asn1/asn1.h @@ -1380,6 +1380,7 @@ void ERR_load_ASN1_strings(void); #define ASN1_R_TIME_NOT_ASCII_FORMAT 193 #define ASN1_R_TOO_LONG 155 #define ASN1_R_TYPE_NOT_CONSTRUCTED 156 +#define ASN1_R_TYPE_NOT_PRIMITIVE 218 #define ASN1_R_UNABLE_TO_DECODE_RSA_KEY 157 #define ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY 158 #define ASN1_R_UNEXPECTED_EOC 159 diff --git a/crypto/asn1/asn1_err.c b/crypto/asn1/asn1_err.c index aa60203ba8..73686de8e7 100644 --- a/crypto/asn1/asn1_err.c +++ b/crypto/asn1/asn1_err.c @@ -1,6 +1,6 @@ /* crypto/asn1/asn1_err.c */ /* ==================================================================== - * Copyright (c) 1999-2011 The OpenSSL Project. All rights reserved. + * Copyright (c) 1999-2014 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -295,6 +295,7 @@ static ERR_STRING_DATA ASN1_str_reasons[]= {ERR_REASON(ASN1_R_TIME_NOT_ASCII_FORMAT),"time not ascii format"}, {ERR_REASON(ASN1_R_TOO_LONG) ,"too long"}, {ERR_REASON(ASN1_R_TYPE_NOT_CONSTRUCTED) ,"type not constructed"}, +{ERR_REASON(ASN1_R_TYPE_NOT_PRIMITIVE) ,"type not primitive"}, {ERR_REASON(ASN1_R_UNABLE_TO_DECODE_RSA_KEY),"unable to decode rsa key"}, {ERR_REASON(ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY),"unable to decode rsa private key"}, {ERR_REASON(ASN1_R_UNEXPECTED_EOC) ,"unexpected eoc"}, diff --git a/crypto/asn1/tasn_dec.c b/crypto/asn1/tasn_dec.c index 87d7dfdf5c..2cbfa81475 100644 --- a/crypto/asn1/tasn_dec.c +++ b/crypto/asn1/tasn_dec.c @@ -870,6 +870,14 @@ static int asn1_d2i_ex_primitive(ASN1_VALUE **pval, } else if (cst) { + if (utype == V_ASN1_NULL || utype == V_ASN1_BOOLEAN + || utype == V_ASN1_OBJECT || utype == V_ASN1_INTEGER + || utype == V_ASN1_ENUMERATED) + { + ASN1err(ASN1_F_ASN1_D2I_EX_PRIMITIVE, + ASN1_R_TYPE_NOT_PRIMITIVE); + return 0; + } buf.length = 0; buf.max = 0; buf.data = NULL; -- 2.25.1