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Reject invalid constructed encodings.

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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.

(Imported from upstream's 89f40f369f414b52e00f7230b0e3ce99e430a508.)

Change-Id: Ia5d15eef72e379119f50fdbac4e92c4761bf5eaf
Reviewed-on: https://boringssl-review.googlesource.com/2835
Reviewed-by: Adam Langley <agl@google.com>
This commit is contained in:
David Benjamin 2015-01-11 20:21:22 -05:00 committed by Adam Langley
parent e3b2eebd04
commit 1716b3d172
3 changed files with 12 additions and 0 deletions
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1
crypto/asn1/asn1_error.c
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@ -182,6 +182,7 @@ const ERR_STRING_DATA ASN1_error_string_data[] = {
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_TIME_NOT_ASCII_FORMAT), "TIME_NOT_ASCII_FORMAT"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_TOO_LONG), "TOO_LONG"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_TYPE_NOT_CONSTRUCTED), "TYPE_NOT_CONSTRUCTED"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_TYPE_NOT_PRIMITIVE), "TYPE_NOT_PRIMITIVE"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_UNABLE_TO_DECODE_RSA_KEY), "UNABLE_TO_DECODE_RSA_KEY"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY), "UNABLE_TO_DECODE_RSA_PRIVATE_KEY"},
{ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_UNEXPECTED_EOC), "UNEXPECTED_EOC"},

10
crypto/asn1/tasn_dec.c
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@ -835,6 +835,16 @@ 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)
{
/* These types only have primitive encodings. */
OPENSSL_PUT_ERROR(ASN1, asn1_d2i_ex_primitive,
ASN1_R_TYPE_NOT_PRIMITIVE);
return 0;
}
buf.length = 0;
buf.max = 0;
buf.data = NULL;

1
include/openssl/asn1.h
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@ -1258,5 +1258,6 @@ OPENSSL_EXPORT int BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix, asn1_ps_f
#define ASN1_R_ERROR_PARSING_SET_ELEMENT 220
#define ASN1_R_WRONG_TAG 221
#define ASN1_R_BOOLEAN_IS_WRONG_LENGTH 222
#define ASN1_R_TYPE_NOT_PRIMITIVE 223
#endif