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OpenPGP: Implement pgp_update_binary() to update file content.

This commit is contained in:
Nguyễn Hồng Quân 2012-05-29 16:20:08 +07:00 committed by Viktor Tarasov
parent 935a7505d7
commit f188a5dda3
1 changed files with 33 additions and 0 deletions
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33
src/libopensc/card-openpgp.c
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@ -1406,6 +1406,38 @@ static int pgp_delete_file(sc_card_t *card, const sc_path_t *path)
return r;
}
/* ABI: Update binary */
static int pgp_update_binary(sc_card_t *card, unsigned int idx,
const u8 *buf, size_t count, unsigned long flags)
{
struct pgp_priv_data *priv = DRVDATA(card);
struct blob *affected_blob = priv->current;
u8 *alldata;
size_t allength;
int r;
/* We will use PUT DATA to write to DO.
* This command does not support index, so we will write the overall data,
* in which the part before idx is get from old content of DO */
allength = idx + count;
alldata = malloc(allength);
if (alldata == NULL)
LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
memset(alldata, 0, allength);
/* Copy the part before idx */
memcpy(alldata, affected_blob->data, MIN(idx, affected_blob->len));
/* Copy data need to be written */
memcpy(alldata, buf, count);
r = pgp_put_data(card, affected_blob->id, alldata, allength);
if (r < 0) {
sc_log(card->ctx, "Failed to update binary. %s", sc_strerror(r));
}
free(alldata);
return r;
}
/* ABI: driver binding stuff */
static struct sc_card_driver *
sc_get_driver(void)
@ -1430,6 +1462,7 @@ sc_get_driver(void)
pgp_ops.decipher = pgp_decipher;
pgp_ops.card_ctl = pgp_card_ctl;
pgp_ops.delete_file = pgp_delete_file;
pgp_ops.update_binary = pgp_update_binary;
return &pgp_drv;
}