sslutil: check for missing certificate and key files (issue5598)
Currently, sslutil._hostsettings() performs validation that web.cacerts
exists. However, client certificates are passed in to the function
and not all callers may validate them. This includes
httpconnection.readauthforuri(), which loads the [auth] section.
If a missing file is specified, the ssl module will raise a generic
IOException. And, it doesn't even give us the courtesy of telling
us which file is missing! Mercurial then prints a generic
"abort: No such file or directory" (or similar) error, leaving users
to scratch their head as to what file is missing.
This commit introduces explicit validation of all paths passed as
arguments to wrapsocket() and wrapserversocket(). Any missing file
is alerted about explicitly.
We should probably catch missing files earlier - as part of loading
the [auth] section. However, I think the sslutil functions should
check for file presence regardless of what callers do because that's
the only way to be sure that missing files are always detected.
#ifndef _HG_BITMANIPULATION_H_
#define _HG_BITMANIPULATION_H_
#include <string.h>
#include "compat.h"
static inline uint32_t getbe32(const char *c)
{
const unsigned char *d = (const unsigned char *)c;
return ((d[0] << 24) |
(d[1] << 16) |
(d[2] << 8) |
(d[3]));
}
static inline int16_t getbeint16(const char *c)
{
const unsigned char *d = (const unsigned char *)c;
return ((d[0] << 8) |
(d[1]));
}
static inline uint16_t getbeuint16(const char *c)
{
const unsigned char *d = (const unsigned char *)c;
return ((d[0] << 8) |
(d[1]));
}
static inline void putbe32(uint32_t x, char *c)
{
c[0] = (x >> 24) & 0xff;
c[1] = (x >> 16) & 0xff;
c[2] = (x >> 8) & 0xff;
c[3] = (x) & 0xff;
}
static inline double getbefloat64(const char *c)
{
const unsigned char *d = (const unsigned char *)c;
double ret;
int i;
uint64_t t = 0;
for (i = 0; i < 8; i++) {
t = (t<<8) + d[i];
}
memcpy(&ret, &t, sizeof(t));
return ret;
}
#endif