diff options
| author | Philipp Maier <pmaier@sysmocom.de> | 2017-03-28 18:36:52 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-04-08 07:44:46 +0000 |
| commit | 14e76b9958b6cb93944a991ffaa5125f601f3d20 (patch) | |
| tree | 2786a32ba58f56531d1ffb1e1b397bf08f753cd2 /include | |
| parent | e0c65301d5786be04cf4731f1cdeed05c4442482 (diff) | |
gsm0808: Add utils for Encryption Information
The planned support for true A over IP requires the encoding of
the an Encryption Information element (see also BSS_MAP_MSG_CIPHER_MODE_CMD).
This commt adds encoding/decoding functionality and tests for
the element mentioned above, however, it is not yet actively used.
Change-Id: I8262050a9d9fd3f17462cfbb046c6e034dccc6fb
Diffstat (limited to 'include')
| -rw-r--r-- | include/osmocom/gsm/gsm0808_utils.h | 8 | ||||
| -rw-r--r-- | include/osmocom/gsm/protocol/gsm_08_08.h | 10 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/osmocom/gsm/gsm0808_utils.h b/include/osmocom/gsm/gsm0808_utils.h index 48e737d1..5bd27c76 100644 --- a/include/osmocom/gsm/gsm0808_utils.h +++ b/include/osmocom/gsm/gsm0808_utils.h @@ -55,3 +55,11 @@ uint8_t gsm0808_enc_channel_type(struct msgb *msg, /* Decode Channel Type element */ int gsm0808_dec_channel_type(struct gsm0808_channel_type *ct, const uint8_t *elem, uint8_t len); + +/* Encode Encryption Information element */ +uint8_t gsm0808_enc_encrypt_info(struct msgb *msg, + const struct gsm0808_encrypt_info *ei); + +/* Decode Encryption Information element */ +int gsm0808_dec_encrypt_info(struct gsm0808_encrypt_info *ei, + const uint8_t *elem, uint8_t len); diff --git a/include/osmocom/gsm/protocol/gsm_08_08.h b/include/osmocom/gsm/protocol/gsm_08_08.h index e2355f68..3939aedd 100644 --- a/include/osmocom/gsm/protocol/gsm_08_08.h +++ b/include/osmocom/gsm/protocol/gsm_08_08.h @@ -447,3 +447,13 @@ struct gsm0808_channel_type { uint8_t perm_spch[CH_TYPE_PERM_SPCH_MAXLEN]; unsigned int perm_spch_len; }; + +/* 3GPP TS 48.008 3.2.2.10 Encryption Information */ +#define ENCRY_INFO_KEY_MAXLEN 252 +#define ENCRY_INFO_PERM_ALGO_MAXLEN 8 +struct gsm0808_encrypt_info { + uint8_t perm_algo[ENCRY_INFO_PERM_ALGO_MAXLEN]; + unsigned int perm_algo_len; + uint8_t key[ENCRY_INFO_KEY_MAXLEN]; + unsigned int key_len; +}; |