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Adding asn1_find_tag() for searching for a tag in a asn1 string.

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Pol Henarejos
2022-05-30 23:31:17 +02:00
parent ef52ae37d3
commit 950e276ee8
4 changed files with 31 additions and 10 deletions
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11
src/fs/file.c
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@@ -305,7 +305,8 @@ int meta_find(uint16_t fid, uint8_t **out) {
file_t *ef = search_by_fid(EF_META, NULL, SPECIFY_EF);
if (!ef)
return CCID_ERR_FILE_NOT_FOUND;
uint8_t tag = 0x0, *tag_data = NULL, *p = NULL, *data = file_get_data(ef);
uint16_t tag = 0x0;
uint8_t *tag_data = NULL, *p = NULL, *data = file_get_data(ef);
size_t tag_len = 0, data_len = file_get_size(ef);
while (walk_tlv(data, data_len, &p, &tag, &tag_len, &tag_data)) {
if (tag_len < 2)
@@ -323,7 +324,8 @@ int meta_delete(uint16_t fid) {
file_t *ef = search_by_fid(EF_META, NULL, SPECIFY_EF);
if (!ef)
return CCID_ERR_FILE_NOT_FOUND;
uint8_t tag = 0x0, *tag_data = NULL, *p = NULL, *data = file_get_data(ef);
uint16_t tag = 0x0;
uint8_t *tag_data = NULL, *p = NULL, *data = file_get_data(ef);
size_t tag_len = 0, data_len = file_get_size(ef);
uint8_t *fdata = NULL;
while (walk_tlv(data, data_len, &p, &tag, &tag_len, &tag_data)) {
@@ -358,7 +360,8 @@ int meta_add(uint16_t fid, const uint8_t *data, uint16_t len) {
uint16_t ef_size = file_get_size(ef);
uint8_t *fdata = (uint8_t *)calloc(1, ef_size);
memcpy(fdata, file_get_data(ef), ef_size);
uint8_t tag = 0x0, *tag_data = NULL, *p = NULL;
uint16_t tag = 0x0;
uint8_t *tag_data = NULL, *p = NULL;
size_t tag_len = 0;
while (walk_tlv(fdata, ef_size, &p, &tag, &tag_len, &tag_data)) {
if (tag_len < 2)
@@ -399,7 +402,7 @@ int meta_add(uint16_t fid, const uint8_t *data, uint16_t len) {
}
fdata = (uint8_t *)realloc(fdata, ef_size+1+format_tlv_len(len+2,NULL)+2+len);
uint8_t *f = fdata+ef_size;
*f++ = fid & 0xff;
*f++ = fid & 0x1f;
f += format_tlv_len(len+2, f);
*f++ = fid >> 8;
*f++ = fid & 0xff;