diff options
Diffstat (limited to 'src/sim/core.c')
-rw-r--r-- | src/sim/core.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/src/sim/core.c b/src/sim/core.c new file mode 100644 index 00000000..890df667 --- /dev/null +++ b/src/sim/core.c @@ -0,0 +1,312 @@ +/* Core routines for SIM/UICC/USIM access */ +/* + * (C) 2012 by Harald Welte <laforge@gnumonks.org> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + + +#include <stdlib.h> +#include <stdint.h> +#include <string.h> + +#include <osmocom/core/talloc.h> +#include <osmocom/sim/sim.h> + +struct osim_decoded_data *osim_file_decode(struct osim_file *file, + int len, uint8_t *data) +{ + struct osim_decoded_data *dd; + + if (!file->desc->ops.parse) + return NULL; + + dd = talloc_zero(file, struct osim_decoded_data); + if (!dd) + return NULL; + dd->file = file; + + if (file->desc->ops.parse(dd, file->desc, len, data) < 0) { + talloc_free(dd); + return NULL; + } else + return dd; +} + +struct msgb *osim_file_encode(const struct osim_file_desc *desc, + const struct osim_decoded_data *data) +{ + if (!desc->ops.encode) + return NULL; + + return desc->ops.encode(desc, data); +} + +static struct osim_decoded_element * +__element_alloc(void *ctx, const char *name, enum osim_element_type type, + enum osim_element_repr repr) +{ + struct osim_decoded_element *elem; + + elem = talloc_zero(ctx, struct osim_decoded_element); + if (!elem) + return NULL; + elem->name = name; + elem->type = type; + elem->representation = repr; + + if (elem->type == ELEM_T_GROUP) + INIT_LLIST_HEAD(&elem->u.siblings); + + return elem; +} + + +struct osim_decoded_element * +element_alloc(struct osim_decoded_data *dd, const char *name, + enum osim_element_type type, enum osim_element_repr repr) +{ + struct osim_decoded_element *elem; + + elem = __element_alloc(dd, name, type, repr); + if (!elem) + return NULL; + + llist_add_tail(&elem->list, &dd->decoded_elements); + + return elem; +} + +struct osim_decoded_element * +element_alloc_sub(struct osim_decoded_element *ee, const char *name, + enum osim_element_type type, enum osim_element_repr repr) +{ + struct osim_decoded_element *elem; + + elem = __element_alloc(ee, name, type, repr); + if (!elem) + return NULL; + + llist_add(&elem->list, &ee->u.siblings); + + return elem; +} + + +void add_filedesc(struct osim_file_desc *root, const struct osim_file_desc *in, int num) +{ + int i; + + for (i = 0; i < num; i++) { + struct osim_file_desc *ofd = talloc_memdup(root, &in[i], sizeof(*in)); + llist_add_tail(&ofd->list, &root->child_list); + } +} + +struct osim_file_desc *alloc_df(void *ctx, uint16_t fid, const char *name) +{ + struct osim_file_desc *mf; + + mf = talloc_zero(ctx, struct osim_file_desc); + if (!mf) + return NULL; + mf->type = TYPE_DF; + mf->fid = fid; + mf->short_name = name; + INIT_LLIST_HEAD(&mf->child_list); + + return mf; +} + +struct osim_file_desc * +add_df_with_ef(struct osim_file_desc *parent, + uint16_t fid, const char *name, + const struct osim_file_desc *in, int num) +{ + struct osim_file_desc *df; + + df = alloc_df(parent, fid, name); + if (!df) + return NULL; + df->parent = parent; + llist_add_tail(&df->list, &parent->child_list); + add_filedesc(df, in, num); + + return df; +} + +struct osim_file_desc * +add_adf_with_ef(struct osim_file_desc *parent, + const uint8_t *adf_name, uint8_t adf_name_len, + const char *name, const struct osim_file_desc *in, + int num) +{ + struct osim_file_desc *df; + + df = alloc_df(parent, 0xffff, name); + if (!df) + return NULL; + df->type = TYPE_ADF; + df->df_name = adf_name; + df->df_name_len = adf_name_len; + df->parent = parent; + llist_add_tail(&df->list, &parent->child_list); + add_filedesc(df, in, num); + + return df; +} + +struct osim_file_desc * +osim_file_find_name(struct osim_file_desc *parent, const char *name) +{ + struct osim_file_desc *ofd; + llist_for_each_entry(ofd, &parent->child_list, list) { + if (!strcmp(ofd->short_name, name)) { + return ofd; + } + } + return NULL; +} + +/*! \brief Generate an APDU message and initialize APDU command header + * \param[in] cla CLASS byte + * \param[in] ins INSTRUCTION byte + * \param[in] p1 Parameter 1 byte + * \param[in] p2 Parameter 2 byte + * \param[in] lc number of bytes in the command data field Nc, which will encoded in 0, 1 or 3 bytes into Lc + * \param[in] le maximum number of bytes expected in the response data field, which will encoded in 0, 1, 2 or 3 bytes into Le + * \returns an APDU message generated using provided APDU parameters + * + * This function generates an APDU message, as defined in ISO/IEC 7816-4:2005(E) ยง5.1. + * The APDU command header, command and response fields lengths are initialized using the parameters. + * The APDU case is determined by the command and response fields lengths. + */ +struct msgb *osim_new_apdumsg(uint8_t cla, uint8_t ins, uint8_t p1, + uint8_t p2, uint16_t lc, uint16_t le) +{ + struct osim_apdu_cmd_hdr *ch; + struct msgb *msg = msgb_alloc(lc+le+sizeof(*ch)+2, "APDU"); + if (!msg) + return NULL; + + ch = (struct osim_apdu_cmd_hdr *) msgb_put(msg, sizeof(*ch)); + msg->l2h = (uint8_t *) ch; + + ch->cla = cla; + ch->ins = ins; + ch->p1 = p1; + ch->p2 = p2; + + msgb_apdu_lc(msg) = lc; + msgb_apdu_le(msg) = le; + + if (lc == 0 && le == 0) + msgb_apdu_case(msg) = APDU_CASE_1; + else if (lc == 0 && le >= 1) { + if (le <= 256) + msgb_apdu_case(msg) = APDU_CASE_2S; + else + msgb_apdu_case(msg) = APDU_CASE_2E; + } else if (le == 0 && lc >= 1) { + if (lc <= 255) + msgb_apdu_case(msg) = APDU_CASE_3S; + else + msgb_apdu_case(msg) = APDU_CASE_3E; + } else if (lc >= 1 && le >= 1) { + if (lc <= 255 && le <= 256) + msgb_apdu_case(msg) = APDU_CASE_4S; + else + msgb_apdu_case(msg) = APDU_CASE_4E; + } + + return msg; +} + +/* FIXME: do we want to mark this as __thread? */ +static char sw_print_buf[256]; + +char *osim_print_sw(const struct osim_card_hdl *ch, uint16_t sw_in) +{ + const struct osim_card_sw *csw; + + if (!ch || !ch->prof) + goto ret_def; + + csw = osim_find_sw(ch->prof, sw_in); + if (!csw) + goto ret_def; + + switch (csw->type) { + case SW_TYPE_STR: + snprintf(sw_print_buf, sizeof(sw_print_buf), + "%04x (%s)", sw_in, csw->u.str); + break; + default: + goto ret_def; + } + + sw_print_buf[sizeof(sw_print_buf)-1] = '\0'; + + return sw_print_buf; + +ret_def: + snprintf(sw_print_buf, sizeof(sw_print_buf), + "%04x (Unknown)", sw_in); + sw_print_buf[sizeof(sw_print_buf)-1] = '\0'; + + return sw_print_buf; +} + + +const struct osim_card_sw *osim_find_sw(const struct osim_card_profile *cp, + uint16_t sw_in) +{ + const struct osim_card_sw **sw_lists = cp->sws; + const struct osim_card_sw *sw_list, *sw; + + for (sw_list = *sw_lists++; sw_list != NULL; sw = sw_list = *sw_lists++) { + for (sw = sw_list; sw->code != 0 && sw->mask != 0; sw++) { + if ((sw_in & sw->mask) == sw->code) + return sw; + } + } + return NULL; +} + +enum osim_card_sw_class osim_sw_class(const struct osim_card_profile *cp, + uint16_t sw_in) +{ + const struct osim_card_sw *csw = osim_find_sw(cp, sw_in); + + if (!csw) + return SW_CLS_NONE; + + return csw->class; +} + +int default_decode(struct osim_decoded_data *dd, + const struct osim_file_desc *desc, + int len, uint8_t *data) +{ + struct osim_decoded_element *elem; + + elem = element_alloc(dd, "Unknown Payload", ELEM_T_BYTES, ELEM_REPR_HEX); + elem->u.buf = talloc_memdup(elem, data, len); + + return 0; +} |