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** [bugs:#1390] Curl with trace log enabled will exception during dump cert **
**Status:** open
**Created:** Wed Jul 02, 2014 10:04 AM UTC by terry wang
**Last Updated:** Wed Jul 02, 2014 10:04 AM UTC
**Owner:** nobody
The bug1295 still can repro if curl trace log enabled, please investigate.
Exception happens during dump cert
Curl wants to dump a certificate from cert chain. But the certificate string doesn't have "\0" at the end(OpenSSL returned the starting address and the length of the cert). So the exception happens during do strlen() operation.
static void dumpcert(struct SessionHandle data, X509 x, int numcert) // Ssluse.c
--> Curl_ssl_push_certinfo_len(data, numcert, "Cert", biomem->data, biomem->length); // Sslgen.c 
// biomem->data is the starting address of certificate.
// biomem->length is the length of certificate.
--> curl_maprintf("%s:%.s", label, valuelen, value); // Mprinft.c
// valuelen is the length of certificate.
// value is the starting address of certificate.
--> dprintf_formatf(&info, alloc_addbyter, format, ap_save); // Mprinft.c
{
...
case FORMAT_STRING:
{
str = (char ) p->data.str; // "str" is the starting address of certificate.
len = strlen(str); // If the "str" is not terminate with "\0", an exception maybe happens.
...
}
}
strlen() pops up exception in my core dump.
Crul version: 7.32.0
OpenSSL version: 1.0.1h
Platform: Win7 X86
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