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Reorganise -subj option code, fix buffer overrun.

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This commit is contained in:
Dr. Stephen Henson 2002-05-19 16:31:10 +00:00
parent b89670ef0e
commit eee6c81af8
3 changed files with 33 additions and 134 deletions
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2
apps/apps.h
View File

@ -253,6 +253,8 @@ int unpack_revinfo(ASN1_TIME **prevtm, int *preason, ASN1_OBJECT **phold,
ASN1_GENERALIZEDTIME **pinvtm, char *str);
int make_serial_index(TXT_DB *db);
X509_NAME *do_subject(char *str, long chtype);
#define FORMAT_UNDEF 0
#define FORMAT_ASN1 1
#define FORMAT_TEXT 2

49
apps/ca.c
View File

@ -238,7 +238,6 @@ static int do_body(X509 **xret, EVP_PKEY *pkey, X509 *x509, const EVP_MD *dgst,
int verbose, X509_REQ *req, char *ext_sect, CONF *conf,
unsigned long certopt, unsigned long nameopt, int default_op,
int ext_copy);
static X509_NAME *do_subject(char *subject);
static int do_revoke(X509 *x509, TXT_DB *db, int ext, char *extval);
static int get_certificate_status(const char *ser_status, TXT_DB *db);
static int do_updatedb(TXT_DB *db);
@ -1879,7 +1878,7 @@ static int do_body(X509 **xret, EVP_PKEY *pkey, X509 *x509, const EVP_MD *dgst,
if (subj)
{
X509_NAME *n = do_subject(subj);
X509_NAME *n = do_subject(subj, MBSTRING_ASC);
if (!n)
{
@ -3027,13 +3026,13 @@ int make_revoked(X509_REVOKED *rev, char *str)
* subject is expected to be in the format /type0=value0/type1=value1/type2=...
* where characters may be escaped by \
*/
static X509_NAME *do_subject(char *subject)
X509_NAME *do_subject(char *subject, long chtype)
{
size_t buflen = strlen (subject)+1; /* to copy the types and values into. due to escaping, the copy can only become shorter */
char *buf = malloc (buflen);
size_t buflen = strlen(subject)+1; /* to copy the types and values into. due to escaping, the copy can only become shorter */
char *buf = OPENSSL_malloc(buflen);
size_t max_ne = buflen / 2 + 1; /* maximum number of name elements */
char **ne_types = malloc (max_ne * sizeof (char *));
char **ne_values = malloc (max_ne * sizeof (char *));
char **ne_types = OPENSSL_malloc(max_ne * sizeof (char *));
char **ne_values = OPENSSL_malloc(max_ne * sizeof (char *));
char *sp = subject, *bp = buf;
int i, ne_num = 0;
@ -3044,13 +3043,13 @@ static X509_NAME *do_subject(char *subject)
if (!buf || !ne_types || !ne_values)
{
BIO_printf(bio_err, "malloc error\n");
goto error0;
goto error;
}
if (*subject != '/')
{
BIO_printf(bio_err, "Subject does not start with '/'.\n");
goto error0;
goto error;
}
sp++; /* skip leading / */
@ -3066,7 +3065,7 @@ static X509_NAME *do_subject(char *subject)
else
{
BIO_printf(bio_err, "escape character at end of string\n");
goto error0;
goto error;
}
else if (*sp == '=')
{
@ -3080,7 +3079,7 @@ static X509_NAME *do_subject(char *subject)
if (!*sp)
{
BIO_printf(bio_err, "end of string encountered while processing type of subject name element #%d\n", ne_num);
goto error0;
goto error;
}
ne_values[ne_num] = bp;
while (*sp)
@ -3091,12 +3090,11 @@ static X509_NAME *do_subject(char *subject)
else
{
BIO_printf(bio_err, "escape character at end of string\n");
goto error0;
goto error;
}
else if (*sp == '/')
{
sp++;
*bp++ = '\0';
break;
}
else
@ -3107,7 +3105,7 @@ static X509_NAME *do_subject(char *subject)
}
if (!(n = X509_NAME_new()))
goto error0;
goto error;
for (i = 0; i < ne_num; i++)
{
@ -3123,25 +3121,26 @@ static X509_NAME *do_subject(char *subject)
continue;
}
if (!X509_NAME_add_entry_by_NID(n, nid, MBSTRING_ASC, (unsigned char*)ne_values[i], -1,-1,0))
goto error1;
if (!X509_NAME_add_entry_by_NID(n, nid, chtype, (unsigned char*)ne_values[i], -1,-1,0))
goto error;
}
free (ne_values);
free (ne_types);
free (buf);
OPENSSL_free(ne_values);
OPENSSL_free(ne_types);
OPENSSL_free(buf);
return n;
error1:
error:
X509_NAME_free(n);
error0:
free (ne_values);
free (ne_types);
free (buf);
if (ne_values)
OPENSSL_free(ne_values);
if (ne_types)
OPENSSL_free(ne_types);
if (buf)
OPENSSL_free(buf);
return NULL;
}
int old_entry_print(BIO *bp, ASN1_OBJECT *obj, ASN1_STRING *str)
{
char buf[25],*pbuf, *p;

116
apps/req.c
View File

@ -1217,120 +1217,18 @@ err:
*/
static int build_subject(X509_REQ *req, char *subject, unsigned long chtype)
{
size_t buflen = strlen (subject)+1; /* to copy the types and values into. due to escaping, the copy can only become shorter */
char *buf = malloc (buflen);
size_t max_ne = buflen / 2 + 1; /* maximum number of name elements */
char **ne_types = malloc (max_ne * sizeof (char *));
char **ne_values = malloc (max_ne * sizeof (char *));
X509_NAME *n;
char *sp = subject, *bp = buf;
int i, ne_num = 0;
X509_NAME *n = NULL;
int nid;
if (!buf || !ne_types || !ne_values)
{
BIO_printf(bio_err, "malloc error\n");
goto error0;
}
if (*subject != '/')
{
BIO_printf(bio_err, "Subject does not start with '/'.\n");
goto error0;
}
sp++; /* skip leading / */
while (*sp)
{
/* collect type */
ne_types[ne_num] = bp;
while (*sp)
{
if (*sp == '\\') /* is there anything to escape in the type...? */
if (*++sp)
*bp++ = *sp++;
else
{
BIO_printf(bio_err, "escape character at end of string\n");
goto error0;
}
else if (*sp == '=')
{
sp++;
*bp++ = '\0';
break;
}
else
*bp++ = *sp++;
}
if (!*sp)
{
BIO_printf(bio_err, "end of string encountered while processing type of subject name element #%d\n", ne_num);
goto error0;
}
ne_values[ne_num] = bp;
while (*sp)
{
if (*sp == '\\')
if (*++sp)
*bp++ = *sp++;
else
{
BIO_printf(bio_err, "escape character at end of string\n");
goto error0;
}
else if (*sp == '/')
{
sp++;
*bp++ = '\0';
break;
}
else
*bp++ = *sp++;
}
*bp++ = '\0';
ne_num++;
}
if (!(n = X509_NAME_new()))
goto error0;
for(i = 0; i < ne_num; i++)
{
if ((nid=OBJ_txt2nid(ne_types[i])) == NID_undef)
{
BIO_printf(bio_err, "Subject Attribute %s has no known NID, skipped\n", ne_types[i]);
continue;
}
if (!*ne_values[i])
{
BIO_printf(bio_err, "No value provided for Subject Attribute %s, skipped\n", ne_types[i]);
continue;
}
if (!X509_NAME_add_entry_by_NID(n, nid, chtype, (unsigned char*)ne_values[i], -1,-1,0))
goto error1;
}
if (!(n = do_subject(subject, chtype)))
return 0;
if (!X509_REQ_set_subject_name(req, n))
goto error1;
{
X509_NAME_free(n);
return 0;
}
X509_NAME_free(n);
free (ne_values);
free (ne_types);
free (buf);
return 1;
error1:
X509_NAME_free(n);
error0:
free (ne_values);
free (ne_types);
free (buf);
return 0;
}