static rsRetVal
eiOpenAppend(gcryfile gf)
{
rsRetVal localRet;
DEFiRet;
localRet = eiCheckFiletype(gf);
if(localRet == RS_RET_OK) {
gf->fd = open((char*)gf->eiName,
O_WRONLY|O_APPEND|O_NOCTTY|O_CLOEXEC, 0600);
if(gf->fd == -1) {
ABORT_FINALIZE(RS_RET_EI_OPN_ERR);
}
} else if(localRet == RS_RET_EI_NO_EXISTS) {
/* looks like we need to create a new file */
gf->fd = open((char*)gf->eiName,
O_WRONLY|O_CREAT|O_NOCTTY|O_CLOEXEC, 0600);
if(gf->fd == -1) {
ABORT_FINALIZE(RS_RET_EI_OPN_ERR);
}
CHKiRet(eiWriteRec(gf, "FILETYPE:", 9, RSGCRY_FILETYPE_NAME,
sizeof(RSGCRY_FILETYPE_NAME)-1));
} else {
gf->fd = -1;
ABORT_FINALIZE(localRet);
}
DBGPRINTF("encryption info file %s: opened as #%d\n",
gf->eiName, gf->fd);
finalize_it:
RETiRet;
}
static inline rsRetVal
readIV(gcryfile gf, uchar **iv)
{
rsRetVal localRet;
DEFiRet;
if(gf->fd == -1) {
while(gf->fd == -1) {
localRet = eiOpenRead(gf);
if(localRet == RS_RET_EI_NO_EXISTS) {
/* wait until it is created */
srSleep(0, 10000);
} else {
CHKiRet(localRet);
}
}
CHKiRet(eiCheckFiletype(gf));
}
*iv = malloc(gf->blkLength); /* do NOT zero-out! */
CHKiRet(eiGetIV(gf, *iv, (size_t) gf->blkLength));
finalize_it:
RETiRet;
}
static void
decrypt(char *name)
{
FILE *logfp = NULL, *eifp = NULL;
int r = 0;
char eifname[4096];
if(!strcmp(name, "-")) {
fprintf(stderr, "decrypt mode cannot work on stdin\n");
goto err;
} else {
if((logfp = fopen(name, "r")) == NULL) {
perror(name);
goto err;
}
snprintf(eifname, sizeof(eifname), "%s%s", name, ENCINFO_SUFFIX);
eifname[sizeof(eifname)-1] = '\0';
if((eifp = fopen(eifname, "r")) == NULL) {
perror(eifname);
goto err;
}
if(eiCheckFiletype(eifp) != 0)
goto err;
}
doDecrypt(logfp, eifp, stdout);
fclose(logfp); logfp = NULL;
fclose(eifp); eifp = NULL;
return;
err:
fprintf(stderr, "error %d processing file %s\n", r, name);
if(logfp != NULL)
fclose(logfp);
}
