diff options
Diffstat (limited to 'openssl/crypto/asn1/asn1_gen.c')
| -rw-r--r-- | openssl/crypto/asn1/asn1_gen.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/openssl/crypto/asn1/asn1_gen.c b/openssl/crypto/asn1/asn1_gen.c index 11b582dd3..65749239b 100644 --- a/openssl/crypto/asn1/asn1_gen.c +++ b/openssl/crypto/asn1/asn1_gen.c @@ -74,6 +74,8 @@ #define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val} #define ASN1_FLAG_EXP_MAX 20 +/* Maximum number of nested sequences */ +#define ASN1_GEN_SEQ_MAX_DEPTH 50 /* Input formats */ @@ -110,13 +112,16 @@ typedef struct { int exp_count; } tag_exp_arg; +static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth, + int *perr); static int bitstr_cb(const char *elem, int len, void *bitstr); static int asn1_cb(const char *elem, int len, void *bitstr); static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok); static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass); -static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf); +static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf, + int depth, int *perr); static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); static int asn1_str2tag(const char *tagstr, int len); @@ -133,6 +138,16 @@ ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf) ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf) { + int err = 0; + ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err); + if (err) + ASN1err(ASN1_F_ASN1_GENERATE_V3, err); + return ret; +} + +static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth, + int *perr) +{ ASN1_TYPE *ret; tag_exp_arg asn1_tags; tag_exp_type *etmp; @@ -152,17 +167,22 @@ ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf) asn1_tags.imp_class = -1; asn1_tags.format = ASN1_GEN_FORMAT_ASCII; asn1_tags.exp_count = 0; - if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) + if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) { + *perr = ASN1_R_UNKNOWN_TAG; return NULL; + } if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET)) { if (!cnf) { - ASN1err(ASN1_F_ASN1_GENERATE_V3, - ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); + *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG; return NULL; } - ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); + if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) { + *perr = ASN1_R_ILLEGAL_NESTED_TAGGING; + return NULL; + } + ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr); } else ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype); @@ -280,7 +300,7 @@ static int asn1_cb(const char *elem, int len, void *bitstr) int tmp_tag, tmp_class; if (elem == NULL) - return 0; + return -1; for (i = 0, p = elem; i < len; p++, i++) { /* Look for the ':' in name value pairs */ @@ -353,7 +373,7 @@ static int asn1_cb(const char *elem, int len, void *bitstr) break; case ASN1_GEN_FLAG_FORMAT: - if(!vstart) { + if (!vstart) { ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT); return -1; } @@ -435,7 +455,8 @@ static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) /* Handle multiple types: SET and SEQUENCE */ -static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf) +static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf, + int depth, int *perr) { ASN1_TYPE *ret = NULL; STACK_OF(ASN1_TYPE) *sk = NULL; @@ -454,7 +475,8 @@ static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf) goto bad; for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { ASN1_TYPE *typ = - ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf); + generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf, + depth + 1, perr); if (!typ) goto bad; if (!sk_ASN1_TYPE_push(sk, typ)) |