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added function to extract MS from sslkeylogfile

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mathewmarcus 2018-07-02 20:57:00 -05:00
parent cc3446a1ce
commit 4ef8eb376a
1 changed files with 43 additions and 0 deletions
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43
ssl/ssldecode.c
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@ -116,6 +116,7 @@ static int ssl_generate_keying_material PROTO_LIST((ssl_obj *ssl,
ssl_decoder *d)); ssl_decoder *d));
static int ssl_generate_session_hash PROTO_LIST((ssl_obj *ssl, static int ssl_generate_session_hash PROTO_LIST((ssl_obj *ssl,
ssl_decoder *d)); ssl_decoder *d));
static int ssl_read_key_log_file PROTO_LIST((ssl_decoder *d));
#endif #endif
static int ssl_create_session_lookup_key PROTO_LIST((ssl_obj *ssl, static int ssl_create_session_lookup_key PROTO_LIST((ssl_obj *ssl,
@ -1057,4 +1058,46 @@ static int ssl_generate_session_hash(ssl,d)
abort: abort:
return(_status); return(_status);
} }
static int ssl_read_key_log_file(d)
ssl_decoder *d;
{
int r,_status,dgi,n;
unsigned int t;
size_t l=0;
char *line,*label_data;
while ((n=getline(&line,&l,d->ctx->ssl_key_log_file))!=-1) {
if(n==(d->client_random->len*2)+112 &&
!strncmp(line,"CLIENT_RANDOM",13)) {
if(!(label_data=malloc((d->client_random->len*2)+1)))
ABORT(r);
for(int i=0;i<d->client_random->len;i++)
if(snprintf(label_data+(i*2),3,"%02x",d->client_random->data[i])!=2)
ABORT(r);
if(strncmp(line+14,label_data,64))
continue;
if(r=r_data_alloc(&d->MS,48))
ABORT(r);
for(int i=0; i < d->MS->len; i++) {
if(sscanf(line+14+65+(i*2),"%2x",&t)!=1)
ABORT(r);
*(d->MS->data+i)=(char)t;
}
}
/*
Eventually add support for other labels defined here:
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format
*/
}
_status=0;
abort:
fseek(d->ctx->ssl_key_log_file, SEEK_SET, 0);
return(_status);
}
#endif #endif