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Code Activity

* pksign.c (agent_pksign): Detect whether a Smartcard is to be

Browse source 
used and divert the operation in this case.
* pkdecrypt.c (agent_pkdecrypt): Likewise
* findkey.c (agent_key_from_file): Add optional arg shadow_info
and have it return information about a shadowed key.
* protect.c (agent_get_shadow_info): New.
* protect.c (snext,sskip,smatch): Moved to
* sexp-parse.h: new file.
* divert-scd.c: New.
This commit is contained in:
Werner Koch 2002-03-04 10:34:51 +00:00
parent f8efc7c4ef
commit 9301f1cf69
8 changed files with 198 additions and 80 deletions
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76
agent/protect.c
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@ -30,6 +30,8 @@
#include "agent.h"
#include "sexp-parse.h"
#define PROT_CIPHER GCRY_CIPHER_AES
#define PROT_CIPHER_STRING "aes"
#define PROT_CIPHER_KEYLEN (128/8)
@ -54,80 +56,6 @@ hash_passphrase (const char *passphrase, int hashalgo,
unsigned char *key, size_t keylen);
/* Return the length of the next S-Exp part and update the pointer to
the first data byte. 0 is return on error */
static size_t
snext (unsigned char const **buf)
{
const unsigned char *s;
int n;
s = *buf;
for (n=0; *s && *s != ':' && digitp (s); s++)
n = n*10 + atoi_1 (s);
if (!n || *s != ':')
return 0; /* we don't allow empty lengths */
*buf = s+1;
return n;
}
/* Skip over the S-Expression BUF points to and update BUF to point to
the chacter right behind. DEPTH gives the initial number of open
lists and may be passed as a positive number to skip over the
remainder of an S-Expression if the current position is somewhere
in an S-Expression. The function may return an error code if it
encounters an impossible conditions */
static int
sskip (unsigned char const **buf, int *depth)
{
const unsigned char *s = *buf;
size_t n;
int d = *depth;
while (d > 0)
{
if (*s == '(')
{
d++;
s++;
}
else if (*s == ')')
{
d--;
s++;
}
else
{
if (!d)
return GNUPG_Invalid_Sexp;
n = snext (&s);
if (!n)
return GNUPG_Invalid_Sexp;
s += n;
}
}
*buf = s;
*depth = d;
return 0;
}
/* Check whether the the string at the address BUF points to matches
the token. Return true on match and update BUF to point behind the
token. */
static int
smatch (unsigned char const **buf, size_t buflen, const char *token)
{
size_t toklen = strlen (token);
if (buflen != toklen || memcmp (*buf, token, toklen))
return 0;
*buf += toklen;
return 1;
}
/* Calculate the MIC for a private key S-Exp. SHA1HASH should pint to
a 20 byte buffer. This function is suitable for any algorithms. */