Signed-off-by: Max <max.suraev@fairwaves.co> --- TODO-RELEASE | 1 + include/osmocom/gsm/a5.h | 2 - src/gsm/a5.c | 98 ++++++++++++++++++++++++------------------------ src/gsm/libosmogsm.map | 2 - 4 files changed, 49 insertions(+), 54 deletions(-) diff --git a/TODO-RELEASE b/TODO-RELEASE index d03aa49..ddae4c9 100644 --- a/TODO-RELEASE +++ b/TODO-RELEASE @@ -1,2 +1,3 @@ #library what description / commit summary line +libosmogsm api-change remove osmo_a5_1 and osmo_a5_2 - generic osmo_a5 should suffice for all use cases libosmogb abi-change bssgp: Fix bssgp_tx_fc_bvc parameter type diff --git a/include/osmocom/gsm/a5.h b/include/osmocom/gsm/a5.h index d22cdbb..9d12b03 100644 --- a/include/osmocom/gsm/a5.h +++ b/include/osmocom/gsm/a5.h @@ -54,7 +54,5 @@ osmo_a5_fn_count(uint32_t fn) * (converted internally to fn_count) */ int osmo_a5(int n, const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul); -void osmo_a5_1(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul); -void osmo_a5_2(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul); /*! @} */ diff --git a/src/gsm/a5.c b/src/gsm/a5.c index d0c7c5f..225ff87 100644 --- a/src/gsm/a5.c +++ b/src/gsm/a5.c @@ -101,54 +101,6 @@ _a5_3(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul, bool fn_correct) _a5_4(ck, fn, dl, ul, fn_correct); } -/*! \brief Main method to generate a A5/x cipher stream - * \param[in] n Which A5/x method to use - * \param[in] key 8 or 16 (for a5/4) byte array for the key (as received from the SIM) - * \param[in] fn Frame number - * \param[out] dl Pointer to array of ubits to return Downlink cipher stream - * \param[out] ul Pointer to array of ubits to return Uplink cipher stream - * \returns 0 for success, -ENOTSUP for invalid cipher selection. - * - * Currently A5/[0-4] are supported. - * Either (or both) of dl/ul can be NULL if not needed. - */ -int -osmo_a5(int n, const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) -{ - switch (n) - { - case 0: - if (dl) - memset(dl, 0x00, 114); - if (ul) - memset(ul, 0x00, 114); - break; - - case 1: - osmo_a5_1(key, fn, dl, ul); - break; - - case 2: - osmo_a5_2(key, fn, dl, ul); - break; - - case 3: - _a5_3(key, fn, dl, ul, true); - break; - - case 4: - _a5_4(key, fn, dl, ul, true); - break; - - default: - /* a5/[5..7] not supported here/yet */ - return -ENOTSUP; - } - - return 0; -} - - /* ------------------------------------------------------------------------ */ /* A5/1&2 common stuff */ /* ------------------------------------------------------------------------ */ @@ -261,7 +213,7 @@ _a5_1_get_output(uint32_t r[]) * Either (or both) of dl/ul can be NULL if not needed. */ void -osmo_a5_1(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) +_a5_1(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) { uint32_t r[3] = {0, 0, 0}; uint32_t fn_count; @@ -378,7 +330,7 @@ _a5_2_get_output(uint32_t r[]) * Either (or both) of dl/ul can be NULL if not needed. */ void -osmo_a5_2(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) +_a5_2(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) { uint32_t r[4] = {0, 0, 0, 0}; uint32_t fn_count; @@ -437,5 +389,51 @@ osmo_a5_2(const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) ul[i] = _a5_2_get_output(r); } } +/*! \brief Main method to generate a A5/x cipher stream + * \param[in] n Which A5/x method to use + * \param[in] key 8 or 16 (for a5/4) byte array for the key (as received from the SIM) + * \param[in] fn Frame number + * \param[out] dl Pointer to array of ubits to return Downlink cipher stream + * \param[out] ul Pointer to array of ubits to return Uplink cipher stream + * \returns 0 for success, -ENOTSUP for invalid cipher selection. + * + * Currently A5/[0-4] are supported. + * Either (or both) of dl/ul can be NULL if not needed. + */ +int +osmo_a5(int n, const uint8_t *key, uint32_t fn, ubit_t *dl, ubit_t *ul) +{ + switch (n) + { + case 0: + if (dl) + memset(dl, 0x00, 114); + if (ul) + memset(ul, 0x00, 114); + break; + + case 1: + _a5_1(key, fn, dl, ul); + break; + + case 2: + _a5_2(key, fn, dl, ul); + break; + + case 3: + _a5_3(key, fn, dl, ul, true); + break; + + case 4: + _a5_4(key, fn, dl, ul, true); + break; + + default: + /* a5/[5..7] not supported here/yet */ + return -ENOTSUP; + } + + return 0; +} /*! @} */ diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 22428a2..56f33d9 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -201,8 +201,6 @@ ms_pwr_ctl_lvl; ms_pwr_dbm; osmo_a5; -osmo_a5_1; -osmo_a5_2; osmo_auth_alg_name; osmo_auth_alg_parse; -- 2.1.4