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OpenPGP: implement pgp_do_iswritable()

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Nguyễn Hồng Quân 2012-06-01 18:23:44 +02:00 committed by Viktor Tarasov
parent d8d6902699
commit a1ed22b6fd
1 changed files with 30 additions and 0 deletions
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30
src/libopensc/card-openpgp.c
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@ -979,6 +979,36 @@ pgp_get_data(sc_card_t *card, unsigned int tag, u8 *buf, size_t buf_len)
LOG_FUNC_RETURN(card->ctx, apdu.resplen);
}
/* Internal: Check if a blob is writable */
static u8
pgp_blob_iswritable(sc_card_t *card, struct blob *tested_blob)
{
return ((tested_blob->info->access & WRITE_MASK) != WRITE_NEVER);
}
/**
* Internal: Check if a DO is writable
* @param[out] ref_blob Pointer to the blob corresponding to the DO.
**/
static u8
pgp_do_iswritable(sc_card_t *card, unsigned int tag, struct blob **ref_blob)
{
struct pgp_priv_data *priv = DRVDATA(card);
int r;
/* Check if current selected blob is which we want to test*/
if (priv->current->id == tag) {
*ref_blob = priv->current;
return pgp_blob_iswritable(card, priv->current);
}
/* Look for the blob representing the DO */
r = pgp_seek_blob(card, priv->mf, tag, ref_blob);
if (r < 0) {
sc_log(card->ctx, "Failed to seek the blob representing the tag %04X. Error %d.", tag, r);
return 0;
}
return pgp_blob_iswritable(card, *ref_blob);
}
/* ABI: PUT DATA */
static int