August 2023 - gerrit-log - lists.osmocom.org

[M] Change in osmo-pcu[master]: vty: Allow modifying default msclass

by jolly

Attention is currently required from: laforge, pespin. jolly has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-pcu/+/33983 ) Change subject: vty: Allow modifying default msclass ...................................................................... Patch Set 5: Code-Review+1 -- To view, visit https://gerrit.osmocom.org/c/osmo-pcu/+/33983 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-pcu Gerrit-Branch: master Gerrit-Change-Id: If80fdd793db7dad029faa83dbf980ffc4959e2e5 Gerrit-Change-Number: 33983 Gerrit-PatchSet: 5 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Hoernchen <ewild(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: jolly <andreas(a)eversberg.eu> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Wed, 23 Aug 2023 08:27:00 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

1 year, 11 months

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[XL] Change in osmo-tetra[master]: Added crypto support

by Jenkins Builder

Jenkins Builder has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-tetra/+/34169 ) Change subject: Added crypto support ...................................................................... Patch Set 1: (5 comments) File src/crypto/hurdle.c: Robot Comment from checkpatch (run ID jenkins-gerrit-lint-10588): https://gerrit.osmocom.org/c/osmo-tetra/+/34169/comment/caf79c6b_91d85cc7 PS1, Line 106: for (int i = 0; i < 256; i++) { braces {} are not necessary for single statement blocks File src/crypto/taa1.c: Robot Comment from checkpatch (run ID jenkins-gerrit-lint-10588): https://gerrit.osmocom.org/c/osmo-tetra/+/34169/comment/c171fc75_a036ecc1 PS1, Line 403: */ trailing whitespace Robot Comment from checkpatch (run ID jenkins-gerrit-lint-10588): https://gerrit.osmocom.org/c/osmo-tetra/+/34169/comment/cbfbf66b_7f699118 PS1, Line 437: Computes: trailing whitespace File src/crypto/tetra_crypto.c: Robot Comment from checkpatch (run ID jenkins-gerrit-lint-10588): https://gerrit.osmocom.org/c/osmo-tetra/+/34169/comment/d92680cc_f3c6d0ba PS1, Line 249: // key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time), tmpdu_offset, ct_len); please, no space before tabs Robot Comment from checkpatch (run ID jenkins-gerrit-lint-10588): https://gerrit.osmocom.org/c/osmo-tetra/+/34169/comment/bbbfa6c8_4653a9a2 PS1, Line 280: // key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time)); please, no space before tabs -- To view, visit https://gerrit.osmocom.org/c/osmo-tetra/+/34169 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-tetra Gerrit-Branch: master Gerrit-Change-Id: I0c0227cf5b747bd5032602390175b898173f6ae6 Gerrit-Change-Number: 34169 Gerrit-PatchSet: 1 Gerrit-Owner: wbokslag <w.bokslag(a)midnightblue.nl> Gerrit-CC: Jenkins Builder Gerrit-Comment-Date: Wed, 23 Aug 2023 08:24:41 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Gerrit-MessageType: comment

1 year, 11 months

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[XL] Change in osmo-tetra[master]: Added crypto support

by wbokslag

wbokslag has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-tetra/+/34169 ) Change subject: Added crypto support ...................................................................... Added crypto support Added TETRA cryptographic primitives (TEA1-3, TAA1 minus TA61). If a keyfile is loaded (using -k flag), matching signalling frames will be decrypted. No support for traffic or identity encryption yet. Based on https://github.com/MidnightBlueLabs/TETRA_crypto Change-Id: I0c0227cf5b747bd5032602390175b898173f6ae6 --- M src/Makefile A src/crypto/hurdle.c A src/crypto/hurdle.h A src/crypto/taa1.c A src/crypto/taa1.h A src/crypto/tea1.c A src/crypto/tea1.h A src/crypto/tea2.c A src/crypto/tea2.h A src/crypto/tea3.c A src/crypto/tea3.h M src/crypto/tetra_crypto.c 12 files changed, 1,207 insertions(+), 15 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-tetra refs/changes/69/34169/1 diff --git a/src/Makefile b/src/Makefile index b424ea4..8a4277e 100644 --- a/src/Makefile +++ b/src/Makefile @@ -16,7 +16,7 @@ libosmo-tetra-mac.a: lower_mac/tetra_conv_enc.o lower_mac/tch_reordering.o tetra_tdma.o lower_mac/tetra_scramb.o lower_mac/tetra_rm3014.o lower_mac/tetra_interleave.o lower_mac/crc_simple.o tetra_common.o lower_mac/viterbi.o lower_mac/viterbi_cch.o lower_mac/viterbi_tch.o lower_mac/tetra_lower_mac.o tetra_upper_mac.o tetra_mac_pdu.o tetra_llc_pdu.o tetra_llc.o tetra_mle_pdu.o tetra_mle.o tetra_mm_pdu.o tetra_cmce_pdu.o tetra_sndcp_pdu.o tetra_gsmtap.o tuntap.o $(AR) r $@ $^ -libosmo-tetra-crypto.a: crypto/tetra_crypto.o +libosmo-tetra-crypto.a: crypto/tea1.o crypto/tea2.o crypto/tea3.o crypto/hurdle.o crypto/taa1.o crypto/tetra_crypto.o $(AR) r $@ $^ float_to_bits: float_to_bits.o diff --git a/src/crypto/hurdle.c b/src/crypto/hurdle.c new file mode 100644 index 0000000..fef52d3 --- /dev/null +++ b/src/crypto/hurdle.c @@ -0,0 +1,198 @@ +/* TETRA HURDLE block cipher implementation */ +/* + * Copyright (C) 2023 Midnight Blue B.V. + * + * Author: Wouter Bokslag <w.bokslag [ ] midnightblue [ ] nl> + * + * SPDX-License-Identifier: AGPL-3.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * See the COPYING file in the main directory for details. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <stdlib.h> + +#include "hurdle.h" + +const uint8_t g_abHurdleSbox[256] = { + 0xF4, 0x65, 0x01, 0x00, 0xBA, 0x7A, 0xA7, 0x47, 0x98, 0xDD, 0x9D, 0xAD, 0x96, 0x5D, 0xAA, 0x3D, + 0x58, 0xC0, 0x72, 0xD8, 0x66, 0x4C, 0x3E, 0xE0, 0x80, 0x55, 0xDE, 0x90, 0x2A, 0x4B, 0x83, 0xA0, + 0x51, 0x39, 0xED, 0x6C, 0x8A, 0x2C, 0x56, 0x60, 0x4A, 0x1F, 0xD0, 0x70, 0x6E, 0x33, 0x8B, 0x26, + 0x2E, 0x6F, 0x89, 0x48, 0x5E, 0x40, 0xC3, 0xA4, 0xA9, 0xCF, 0x22, 0x50, 0xE1, 0x15, 0x0C, 0xAB, + 0xD5, 0xF8, 0x5F, 0x36, 0x04, 0xA6, 0x4E, 0x92, 0x1E, 0x2B, 0x88, 0x30, 0x93, 0x45, 0x67, 0x16, + 0x8C, 0x68, 0x23, 0x38, 0x61, 0x25, 0x1A, 0x81, 0x63, 0xCB, 0xC1, 0x13, 0x41, 0x37, 0x0E, 0x97, + 0x5B, 0xCA, 0x57, 0x24, 0x4D, 0x17, 0xC4, 0xB9, 0xB3, 0xEF, 0x8D, 0x52, 0x32, 0x2F, 0xEC, 0x20, + 0xD9, 0x11, 0xD1, 0x28, 0x79, 0xDA, 0xFB, 0xE9, 0xBB, 0x06, 0x77, 0xDB, 0xFC, 0xFE, 0xCD, 0x84, + 0x1D, 0xA1, 0x54, 0x1B, 0xB0, 0xE4, 0xCC, 0x7C, 0x2D, 0x27, 0x31, 0x49, 0xF5, 0x02, 0x69, 0x53, + 0x4F, 0x44, 0xDF, 0x18, 0x5C, 0x0F, 0xBC, 0x9B, 0x94, 0xBD, 0xDC, 0x0B, 0xA2, 0xC7, 0x09, 0xAC, + 0xC6, 0x9F, 0x82, 0x1C, 0x05, 0x46, 0xC2, 0x34, 0x3C, 0x0D, 0x3B, 0xCE, 0xB7, 0xBE, 0x08, 0x9C, + 0x6B, 0xEE, 0xE5, 0x87, 0xAF, 0xBF, 0xF2, 0xEB, 0x7B, 0x07, 0x64, 0xC5, 0xB6, 0xAE, 0x9A, 0x95, + 0x35, 0xA5, 0x59, 0x12, 0x9E, 0xA3, 0xB8, 0x8E, 0x5A, 0xF7, 0x62, 0xD2, 0x3A, 0xA8, 0x7D, 0x85, + 0xF6, 0xC8, 0x71, 0x29, 0xD6, 0xD7, 0x43, 0xF9, 0x78, 0x76, 0x73, 0x10, 0x91, 0x19, 0x0A, 0x99, + 0xF0, 0xE6, 0x3F, 0x14, 0xF1, 0xE2, 0xB1, 0x86, 0xB4, 0xF3, 0x74, 0xFA, 0x6A, 0xB2, 0x21, 0x6D, + 0xEA, 0xB5, 0xE7, 0xE3, 0xC9, 0xD3, 0x8F, 0x03, 0x75, 0xE8, 0xD4, 0x42, 0xFD, 0x7E, 0xFF, 0x7F}; + +#if __BYTE_ORDER == __LITTLE_ENDIAN +static const uint32_t g_adwReorder[16] = { + 0x00000000, 0x80000000, 0x00800000, 0x80800000, + 0x00008000, 0x80008000, 0x00808000, 0x80808000, + 0x00000080, 0x80000080, 0x00800080, 0x80800080, + 0x00008080, 0x80008080, 0x00808080, 0x80808080 +}; +#else +static const uint32_t g_adwReorder[16] = { + 0x00000000, 0x00000080, 0x00008000, 0x00008080, + 0x00800000, 0x00800080, 0x00808000, 0x00808080, + 0x80000000, 0x80000080, 0x80008000, 0x80008080, + 0x80800000, 0x80800080, 0x80808000, 0x80808080 +}; +#endif + +void hurdle_set_key(uint8_t *k, struct hurdle_ctx *lpContextOut) +{ + /* Simplified key schedule by precomputing rotates and xor constants */ + uint8_t abKeyBytes[256] = { + /* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 + |-------- UNUSED --------| |------ BARELY USED -----| */ + k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], + k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], + k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], + k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], + k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], + k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], + k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], + k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], + k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], + k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], + k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], + k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], + k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], + k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], + k[6], k[7], k[8], k[9], k[10], k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], + k[11], k[12], k[13], k[14], k[15], k[0], k[1], k[2], k[3], k[4], k[5], k[6], k[7], k[8], k[9], k[10]}; + static const uint8_t abKeyXorConsts[256] = { + // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // rk00 + 0x3C, 0xA7, 0xEC, 0x25, 0x79, 0x57, 0xDF, 0xC0, 0x38, 0x0A, 0x33, 0x1E, 0xF3, 0x8C, 0xF4, 0xF7, // rk01 + 0x6B, 0x78, 0x2C, 0x1D, 0x73, 0x64, 0xC1, 0x33, 0xB4, 0xFE, 0xC4, 0x22, 0x54, 0x60, 0xD1, 0x8E, // rk02 + 0x58, 0x66, 0xDF, 0x91, 0x87, 0x93, 0xFD, 0x94, 0x58, 0xDB, 0xBD, 0x75, 0x8B, 0xA0, 0xE9, 0x84, // rk03 + 0xAF, 0x5A, 0x78, 0x7D, 0xA2, 0xEA, 0xAA, 0x4B, 0x98, 0xE3, 0xB7, 0x46, 0x95, 0x53, 0x65, 0x70, // rk04 + 0x41, 0x05, 0x06, 0x8F, 0x32, 0xCF, 0x3C, 0x77, 0x7E, 0x9F, 0x60, 0x7B, 0x83, 0x23, 0xAE, 0x8F, // rk05 + 0x4B, 0xD9, 0x73, 0x45, 0x02, 0xD4, 0xFC, 0x6E, 0xB7, 0x4B, 0x36, 0x18, 0x7C, 0xBE, 0x3B, 0xCB, // rk06 + 0xE8, 0x5B, 0x82, 0x92, 0x32, 0x61, 0xC7, 0xBC, 0x86, 0x31, 0xF8, 0x55, 0x2A, 0xFF, 0xB1, 0xF5, // rk07 + 0x5D, 0x60, 0x50, 0xA3, 0x48, 0xAF, 0x8A, 0xEA, 0xC7, 0xBB, 0xC6, 0xF6, 0xA8, 0x0E, 0x66, 0xC5, // rk08 + 0x93, 0x2D, 0x06, 0xE2, 0xC2, 0x91, 0x29, 0x68, 0x36, 0x6C, 0xF6, 0x43, 0x93, 0xDC, 0x57, 0xBF, // rk09 + 0xAD, 0x8E, 0x84, 0x13, 0x15, 0xA1, 0x9C, 0x53, 0xE4, 0x5D, 0x8C, 0x8D, 0xDE, 0x8A, 0x16, 0x35, // rk10 + 0x6F, 0x43, 0xB1, 0xA9, 0xF4, 0x89, 0x55, 0xD6, 0x0D, 0xA7, 0xBD, 0x9A, 0xE0, 0x99, 0x55, 0x6B, // rk11 + 0x95, 0x53, 0x65, 0x70, 0xAF, 0x5A, 0x78, 0x7D, 0xA2, 0xEA, 0xAA, 0x4B, 0x98, 0xE3, 0xB7, 0x46, // rk12 + 0x66, 0xDF, 0x91, 0x87, 0x93, 0xFD, 0x94, 0x58, 0xDB, 0xBD, 0x75, 0x8B, 0xA0, 0xE9, 0x84, 0x58, // rk13 + 0xC1, 0x33, 0xB4, 0xFE, 0xC4, 0x22, 0x54, 0x60, 0xD1, 0x8E, 0x6B, 0x78, 0x2C, 0x1D, 0x73, 0x64, // rk14 + 0x1E, 0xF3, 0x8C, 0xF4, 0xF7, 0x3C, 0xA7, 0xEC, 0x25, 0x79, 0x57, 0xDF, 0xC0, 0x38, 0x0A, 0x33}; // rk15 + + /* Xor original key byte with round- and offset-specific xor byte */ + for (int i = 0; i < 256; i++) { + lpContextOut->abRoundKeys[i] = abKeyBytes[i] ^ abKeyXorConsts[i]; + } +} + +void HURDLE_f(uint8_t abOutput[4], const uint8_t abRhs[4], const uint8_t *lpRoundKey) +{ + #define PUSH_OUTPUT_NIBBLE(x) do { \ + dwOutputBits >>= 1; \ + dwOutputBits |= g_adwReorder[(x) & 0xf]; \ + } while (0) + + uint32_t dwOutputBits = 0; + uint8_t bSboxState = 0; + + bSboxState = g_abHurdleSbox[(abRhs[3] + lpRoundKey[15]) & 0xff]; + bSboxState = g_abHurdleSbox[((abRhs[2] + lpRoundKey[14]) ^ bSboxState) & 0xff]; + bSboxState = g_abHurdleSbox[((abRhs[1] + lpRoundKey[13]) ^ bSboxState) & 0xff]; + bSboxState = g_abHurdleSbox[((abRhs[0] + lpRoundKey[12]) ^ bSboxState) & 0xff]; + bSboxState = g_abHurdleSbox[((abRhs[3] + lpRoundKey[11]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[1] + lpRoundKey[10]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[2] + lpRoundKey[9]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[0] + lpRoundKey[8]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[1] + lpRoundKey[7]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[3] + lpRoundKey[6]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[0] + lpRoundKey[5]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + bSboxState = g_abHurdleSbox[((abRhs[2] + lpRoundKey[4]) ^ bSboxState) & 0xff]; PUSH_OUTPUT_NIBBLE(bSboxState); + + *(uint32_t *)abOutput = dwOutputBits; +} + +void HURDLE_encrypt(uint8_t abOutput[8], const uint8_t abInput[8], struct hurdle_ctx *lpKey, uint8_t eEncryptMode) +{ + uint32_t dwLhs, dwRhs, dwTemp; + int i; + + /* start at first/last round key depending on encrypt/decrypt mode */ + uint8_t *lpRoundKey = (eEncryptMode == HURDLE_DECRYPT) ? &lpKey->abRoundKeys[240] : lpKey->abRoundKeys; + + /* copy state */ + dwLhs = *(uint32_t *)&abInput[0]; + dwRhs = *(uint32_t *)&abInput[4]; + + for (i = 0; i < 16; i++) { + /* Round function */ + HURDLE_f((uint8_t *)&dwTemp, (uint8_t *)&dwRhs, lpRoundKey); + + /* perform a left-right switcharoo */ + dwTemp ^= dwLhs; + dwLhs = dwRhs; + dwRhs = dwTemp; + + /* move to next/previous round key depending on encrypt/decrypt mode */ + lpRoundKey += (eEncryptMode == HURDLE_DECRYPT) ? -16 : 16; + } + + *(uint32_t *)&abOutput[0] = dwRhs; + *(uint32_t *)&abOutput[4] = dwLhs; +} + +void HURDLE_enc_cbc(uint8_t abCiphertext[16], const uint8_t abPlaintext[16], uint8_t abKey[16]) +{ + uint8_t abIntermediate[8]; + struct hurdle_ctx stCipher; + + hurdle_set_key(abKey, &stCipher); + HURDLE_encrypt(abCiphertext, abPlaintext, &stCipher, HURDLE_ENCRYPT); + *(uint32_t *)&abIntermediate[0] = *(uint32_t *)&abCiphertext[0] ^ *(uint32_t *)&abPlaintext[8]; + *(uint32_t *)&abIntermediate[4] = *(uint32_t *)&abCiphertext[4] ^ *(uint32_t *)&abPlaintext[12]; + HURDLE_encrypt(&abCiphertext[8], abIntermediate, &stCipher, HURDLE_ENCRYPT); +} + +void HURDLE_dec_cts(uint8_t abPlaintext[15], const uint8_t abCiphertext[15], uint8_t abKey[16]) +{ + uint8_t abIntermediate[16]; + struct hurdle_ctx stCipher; + hurdle_set_key(abKey, &stCipher); + + HURDLE_encrypt(&abIntermediate[8], &abCiphertext[7], &stCipher, HURDLE_DECRYPT); + *(uint32_t *)&abIntermediate[0] = *(uint32_t *)&abCiphertext[0]; + *(uint32_t *)&abIntermediate[4] = *(uint32_t *)&abCiphertext[4]; + abIntermediate[7] = abIntermediate[15]; + HURDLE_encrypt(&abIntermediate[0], &abIntermediate[0], &stCipher, HURDLE_DECRYPT); + *(uint32_t *)&abIntermediate[8] ^= *(uint32_t *)&abCiphertext[0]; + *(uint16_t *)&abIntermediate[12] ^= *(uint16_t *)&abCiphertext[4]; + *(uint8_t *)&abIntermediate[14] ^= *(uint8_t *)&abCiphertext[6]; + + *(uint32_t *)&abPlaintext[0] = *(uint32_t *)&abIntermediate[0]; + *(uint32_t *)&abPlaintext[4] = *(uint32_t *)&abIntermediate[4]; + *(uint32_t *)&abPlaintext[8] = *(uint32_t *)&abIntermediate[8]; + *(uint16_t *)&abPlaintext[12] = *(uint16_t *)&abIntermediate[12]; + *(uint8_t *)&abPlaintext[14] = *(uint8_t *)&abIntermediate[14]; +} diff --git a/src/crypto/hurdle.h b/src/crypto/hurdle.h new file mode 100644 index 0000000..bbd641c --- /dev/null +++ b/src/crypto/hurdle.h @@ -0,0 +1,20 @@ +#ifndef HAVE_HURDLE_H +#define HAVE_HURDLE_H + +#include <inttypes.h> + +struct hurdle_ctx { + uint8_t abRoundKeys[256]; +}; + +#define HURDLE_ENCRYPT 0 +#define HURDLE_DECRYPT 1 + +void hurdle_set_key(uint8_t *k, struct hurdle_ctx *lpContextOut); +void HURDLE_encrypt(uint8_t abOutput[8], const uint8_t abInput[8], struct hurdle_ctx *lpKey, uint8_t eEncryptMode); +void HURDLE_enc_cbc(uint8_t abCiphertext[16], const uint8_t abPlaintext[16], uint8_t abKey[16]); +void HURDLE_dec_cts(uint8_t abPlaintext[15], const uint8_t abCiphertext[15], uint8_t abKey[16]); + +extern const uint8_t g_abHurdleSbox[256]; + +#endif /* HAVE_HURDLE_H */ diff --git a/src/crypto/taa1.c b/src/crypto/taa1.c new file mode 100644 index 0000000..16a140c --- /dev/null +++ b/src/crypto/taa1.c @@ -0,0 +1,474 @@ +/* TETRA TAA1 suite implementation */ +/* + * Copyright (C) 2023 Midnight Blue B.V. + * + * Author: Wouter Bokslag <w.bokslag [ ] midnightblue [ ] nl> + * + * SPDX-License-Identifier: AGPL-3.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * See the COPYING file in the main directory for details. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <assert.h> +#include <string.h> + +#include "taa1.h" +#include "hurdle.h" + +void transform_80_to_120(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + lpBufferOut[0] = lpBuffer[0] + lpBuffer[9]; + lpBufferOut[1] = lpBuffer[0]; + lpBufferOut[2] = lpBuffer[9]; + lpBufferOut[3] = lpBuffer[1] + lpBuffer[8]; + lpBufferOut[4] = lpBuffer[1]; + lpBufferOut[5] = lpBuffer[8]; + lpBufferOut[6] = lpBuffer[2] + lpBuffer[7]; + lpBufferOut[7] = lpBuffer[2]; + lpBufferOut[8] = lpBuffer[7]; + lpBufferOut[9] = lpBuffer[3] + lpBuffer[6]; + lpBufferOut[10] = lpBuffer[3]; + lpBufferOut[11] = lpBuffer[6]; + lpBufferOut[12] = lpBuffer[4] + lpBuffer[5]; + lpBufferOut[13] = lpBuffer[4]; + lpBufferOut[14] = lpBuffer[5]; +} + +void transform_80_to_128(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + transform_80_to_120(lpBuffer, lpBufferOut + 1); + lpBufferOut[0] = lpBufferOut[1] ^ lpBufferOut[4] ^ lpBufferOut[7] ^ lpBufferOut[10] ^ lpBufferOut[13]; +} + +void transform_80_to_120_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + lpBufferOut[0] = lpBuffer[0]; + lpBufferOut[1] = lpBuffer[1]; + lpBufferOut[2] = lpBufferOut[0] ^ lpBufferOut[1]; + lpBufferOut[3] = lpBuffer[2]; + lpBufferOut[4] = lpBuffer[3]; + lpBufferOut[5] = lpBufferOut[3] ^ lpBufferOut[4]; + lpBufferOut[6] = lpBuffer[4]; + lpBufferOut[7] = lpBuffer[5]; + lpBufferOut[8] = lpBufferOut[6] ^ lpBufferOut[7]; + lpBufferOut[9] = lpBuffer[6]; + lpBufferOut[10] = lpBuffer[7]; + lpBufferOut[11] = lpBufferOut[9] ^ lpBufferOut[10]; + lpBufferOut[12] = lpBuffer[8]; + lpBufferOut[13] = lpBuffer[9]; + lpBufferOut[14] = lpBufferOut[12] ^ lpBufferOut[13]; +} + +void transform_80_to_128_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + transform_80_to_120_alt(lpBuffer, lpBufferOut); + lpBufferOut[15] = lpBufferOut[2] + lpBufferOut[5] + lpBufferOut[8] + lpBufferOut[11] + lpBufferOut[14]; +} + +void transform_88_to_120(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + lpBufferOut[0] = lpBuffer[0]; + lpBufferOut[1] = lpBuffer[1]; + lpBufferOut[2] = lpBuffer[0] ^ lpBuffer[1]; + lpBufferOut[3] = lpBuffer[2]; + lpBufferOut[4] = lpBuffer[3]; + lpBufferOut[5] = lpBuffer[4]; + lpBufferOut[6] = lpBuffer[2] ^ lpBuffer[3] ^ lpBuffer[4]; + lpBufferOut[7] = lpBuffer[5]; + lpBufferOut[8] = lpBuffer[6]; + lpBufferOut[9] = lpBuffer[7]; + lpBufferOut[10] = lpBuffer[5] ^ lpBuffer[6] ^ lpBuffer[7]; + lpBufferOut[11] = lpBuffer[8]; + lpBufferOut[12] = lpBuffer[9]; + lpBufferOut[13] = lpBuffer[10]; + lpBufferOut[14] = lpBuffer[8] ^ lpBuffer[9] ^ lpBuffer[10]; +} + +void transform_120_to_88(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + lpBufferOut[0] = lpBuffer[0]; + lpBufferOut[1] = lpBuffer[1]; + lpBufferOut[2] = lpBuffer[3]; + lpBufferOut[3] = lpBuffer[4]; + lpBufferOut[4] = lpBuffer[5]; + lpBufferOut[5] = lpBuffer[7]; + lpBufferOut[6] = lpBuffer[8]; + lpBufferOut[7] = lpBuffer[9]; + lpBufferOut[8] = lpBuffer[11]; + lpBufferOut[9] = lpBuffer[12]; + lpBufferOut[10] = lpBuffer[13]; +} + +void transform_120_to_80_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut) +{ + lpBufferOut[0] = lpBuffer[0]; + lpBufferOut[1] = lpBuffer[1]; + lpBufferOut[2] = lpBuffer[3]; + lpBufferOut[3] = lpBuffer[4]; + lpBufferOut[4] = lpBuffer[6]; + lpBufferOut[5] = lpBuffer[7]; + lpBufferOut[6] = lpBuffer[9]; + lpBufferOut[7] = lpBuffer[10]; + lpBufferOut[8] = lpBuffer[12]; + lpBufferOut[9] = lpBuffer[13]; +} + +void ta11_ta41(uint8_t *lpKeyK, uint8_t *lpChallengeRs, uint8_t *lpKsOut) +{ + uint8_t abChallengeExpanded[16]; + transform_80_to_128_alt(lpChallengeRs, abChallengeExpanded); + HURDLE_enc_cbc(lpKsOut, abChallengeExpanded, lpKeyK); +} + +void ta12_ta22(uint8_t *lpKeyKs, uint8_t *lpRand, uint8_t *lpResOut, uint8_t *lpDckOut) +{ + uint8_t abRandExpanded[16]; + uint8_t abCiphertext[16]; + transform_80_to_128_alt(lpRand, abRandExpanded); + HURDLE_enc_cbc(abCiphertext, abRandExpanded, lpKeyKs); + + lpResOut[0] = abCiphertext[0] ^ abCiphertext[3]; + lpResOut[1] = abCiphertext[6]; + lpResOut[2] = abCiphertext[9]; + lpResOut[3] = abCiphertext[12] ^ abCiphertext[15]; + + lpDckOut[0] = abCiphertext[1]; + lpDckOut[1] = abCiphertext[2]; + lpDckOut[2] = abCiphertext[4]; + lpDckOut[3] = abCiphertext[5]; + lpDckOut[4] = abCiphertext[7]; + lpDckOut[5] = abCiphertext[8]; + lpDckOut[6] = abCiphertext[10]; + lpDckOut[7] = abCiphertext[11]; + lpDckOut[8] = abCiphertext[13]; + lpDckOut[9] = abCiphertext[14]; +} + +void ta21(uint8_t *lpKeyK, uint8_t *lpChallengeRs, uint8_t *lpKspOut) +{ + uint8_t abChallengeExpanded[16]; + uint8_t abChallengeReversed[10]; + int i; + + for (i = 0; i < 10; i++) + abChallengeReversed[i] = lpChallengeRs[9-i]; + + transform_80_to_128_alt(abChallengeReversed, abChallengeExpanded); + HURDLE_enc_cbc(lpKspOut, abChallengeExpanded, lpKeyK); +} + +void ta31(uint8_t *lpUnsealedCck, uint8_t *lpCckId, uint8_t *lpDck, uint8_t *lpSealedCckOut) +{ + uint8_t abUnsealedPadded[16]; + uint8_t abHurdleKey[16]; + uint8_t abAdjustedDck[10]; + uint8_t abSealed[16]; + int i; + + transform_80_to_120_alt(lpUnsealedCck, abUnsealedPadded); + abUnsealedPadded[15] = '\0'; + + for (i = 0; i < 10; i++) + abAdjustedDck[i] = lpDck[i] ^ lpCckId[i & 1]; + + transform_80_to_128(abAdjustedDck, abHurdleKey); + HURDLE_enc_cbc(abSealed, abUnsealedPadded, abHurdleKey); + /* ciphertext stealing */ + memcpy(lpSealedCckOut, abSealed, 7); + memcpy(lpSealedCckOut + 7, abSealed + 8, 8); +} + +void ta32(uint8_t *lpSealedCck, uint8_t *lpCckId, uint8_t *lpDck, uint8_t *lpUnsealedCckOut, uint8_t *lpMfOut) +{ + uint8_t abHurdleKey[16]; + uint8_t abAdjustedDck[10]; + uint8_t abUnsealedPadded[16]; + int i; + + for (i = 0; i < 10; i++) + abAdjustedDck[i] = lpDck[i] ^ lpCckId[i & 1]; + + transform_80_to_128(abAdjustedDck, abHurdleKey); + + HURDLE_dec_cts(abUnsealedPadded, lpSealedCck, abHurdleKey); + transform_120_to_80_alt(abUnsealedPadded, lpUnsealedCckOut); + + *lpMfOut = + ((abUnsealedPadded[0] ^ abUnsealedPadded[1]) != abUnsealedPadded[2]) || + ((abUnsealedPadded[3] ^ abUnsealedPadded[4]) != abUnsealedPadded[5]) || + ((abUnsealedPadded[6] ^ abUnsealedPadded[7]) != abUnsealedPadded[8]) || + ((abUnsealedPadded[9] ^ abUnsealedPadded[10]) != abUnsealedPadded[11]) || + ((abUnsealedPadded[12] ^ abUnsealedPadded[13]) != abUnsealedPadded[14]); +} + +void ta51(uint8_t *lpUnsealed, uint8_t *lpVn, uint8_t *lpKey, uint8_t *lpKeyN, uint8_t *lpSealedOut) +{ + uint8_t abUnsealed[11]; + uint8_t abUnsealedPadded[16]; + uint8_t abSealed[16]; + uint8_t abAdjustedKey[16]; + int i; + + assert((*lpKeyN & 0xe0) == 0); + + memcpy(abUnsealed, lpUnsealed, 10); + abUnsealed[10] = *lpKeyN; + transform_88_to_120(abUnsealed, abUnsealedPadded); + abUnsealedPadded[15] = '\0'; + + for (i = 0; i < 16; i++) + abAdjustedKey[i] = lpKey[i] ^ lpVn[i & 1]; + + HURDLE_enc_cbc(abSealed, abUnsealedPadded, abAdjustedKey); + /* ciphertext stealing */ + memcpy(lpSealedOut, abSealed, 7); + memcpy(lpSealedOut + 7, abSealed + 8, 8); +} + +void ta52(uint8_t *lpSealed, uint8_t *lpKey, uint8_t *lpVn, uint8_t *lpUnsealedOut, uint8_t *lpMfOut, uint8_t *lpKeyNOut) +{ + uint8_t abAdjustedKey[16]; + uint8_t abUnsealedPadded[15]; + uint8_t abUnsealed[11]; + int i; + + for (i = 0; i < 16; i++) + abAdjustedKey[i] = lpKey[i] ^ lpVn[i & 1]; + + HURDLE_dec_cts(abUnsealedPadded, lpSealed, abAdjustedKey); + transform_120_to_88(abUnsealedPadded, abUnsealed); + memcpy(lpUnsealedOut, abUnsealed, 10); + *lpKeyNOut = abUnsealed[10]; + *lpMfOut = + ((abUnsealedPadded[0] ^ abUnsealedPadded[1]) != abUnsealedPadded[2]) || + ((abUnsealedPadded[3] ^ abUnsealedPadded[4] ^ abUnsealedPadded[5]) != abUnsealedPadded[6]) || + ((abUnsealedPadded[7] ^ abUnsealedPadded[8] ^ abUnsealedPadded[9]) != abUnsealedPadded[10]) || + ((abUnsealedPadded[11] ^ abUnsealedPadded[12] ^ abUnsealedPadded[13]) != abUnsealedPadded[14]) || + abUnsealed[10] & 0xe0; +} + +void ta71(uint8_t *lpGck, uint8_t *lpCck, uint8_t *lpMgckOut) +{ + uint8_t abCiphertext[16]; + uint8_t abHurdleKey[16]; + uint8_t abPlaintextExpanded[16]; + uint8_t abPlaintext[10]; + int i; + + for (i = 0; i < 10; i++) + abPlaintext[i] = lpGck[i] ^ lpCck[i]; + + transform_80_to_128_alt(abPlaintext, abPlaintextExpanded); + + abHurdleKey[0] = lpGck[0]; + abHurdleKey[1] = lpGck[1]; + abHurdleKey[2] = lpGck[2]; + abHurdleKey[3] = lpGck[3]; + abHurdleKey[4] = lpGck[4]; + abHurdleKey[5] = lpGck[5]; + abHurdleKey[6] = lpGck[6] ^ lpCck[0]; + abHurdleKey[7] = lpGck[7] ^ lpCck[1]; + abHurdleKey[8] = lpGck[8] ^ lpCck[2]; + abHurdleKey[9] = lpGck[9] ^ lpCck[3]; + abHurdleKey[10] = lpCck[4]; + abHurdleKey[11] = lpCck[5]; + abHurdleKey[12] = lpCck[6]; + abHurdleKey[13] = lpCck[7]; + abHurdleKey[14] = lpCck[8]; + abHurdleKey[15] = lpCck[9]; + + HURDLE_enc_cbc(abCiphertext, abPlaintextExpanded, abHurdleKey); + + memcpy(lpMgckOut, &abCiphertext[3], 10); +} + +void ta81(uint8_t *lpUnsealedGck, uint8_t *lpGckVn, uint8_t *lpGckN, uint8_t *lpKey, uint8_t *lpSealedGckOut) +{ + uint8_t abUnsealedPadded[16]; + uint8_t abSealed[16]; + uint8_t abAdjustedKey[16]; + int i; + + abUnsealedPadded[0] = lpUnsealedGck[0]; + abUnsealedPadded[1] = lpUnsealedGck[1]; + abUnsealedPadded[2] = lpUnsealedGck[2]; + abUnsealedPadded[3] = lpUnsealedGck[3]; + abUnsealedPadded[4] = abUnsealedPadded[0] ^ abUnsealedPadded[1] ^ abUnsealedPadded[2] ^ abUnsealedPadded[3]; + abUnsealedPadded[5] = lpUnsealedGck[4]; + abUnsealedPadded[6] = lpUnsealedGck[5]; + abUnsealedPadded[7] = lpUnsealedGck[6]; + abUnsealedPadded[8] = lpUnsealedGck[7]; + abUnsealedPadded[9] = abUnsealedPadded[5] ^ abUnsealedPadded[6] ^ abUnsealedPadded[7] ^ abUnsealedPadded[8]; + abUnsealedPadded[10] = lpUnsealedGck[8]; + abUnsealedPadded[11] = lpUnsealedGck[9]; + abUnsealedPadded[12] = lpGckN[0]; + abUnsealedPadded[13] = lpGckN[1]; + abUnsealedPadded[14] = abUnsealedPadded[10] ^ abUnsealedPadded[11] ^ abUnsealedPadded[12] ^ abUnsealedPadded[13]; + abUnsealedPadded[15] = '\0'; + + for (i = 0; i < 16; i++) + abAdjustedKey[i] = lpKey[i] ^ lpGckVn[i & 1]; + + HURDLE_enc_cbc(abSealed, abUnsealedPadded, abAdjustedKey); + /* ciphertext stealing */ + memcpy(lpSealedGckOut, abSealed, 7); + memcpy(lpSealedGckOut + 7, abSealed + 8, 8); +} + +void ta82(uint8_t *lpSealedGck, uint8_t *lpGckVn, uint8_t *lpKey, uint8_t *lpUnsealedGckOut, uint8_t *lpMfOut, uint8_t *lpGckNOut) +{ + uint8_t abAdjustedKey[16]; + uint8_t abUnsealedPadded[15]; + int i; + + for (i = 0; i < 16; i++) + abAdjustedKey[i] = lpKey[i] ^ lpGckVn[i & 1]; + + HURDLE_dec_cts(abUnsealedPadded, lpSealedGck, abAdjustedKey); + + lpUnsealedGckOut[0] = abUnsealedPadded[0]; + lpUnsealedGckOut[1] = abUnsealedPadded[1]; + lpUnsealedGckOut[2] = abUnsealedPadded[2]; + lpUnsealedGckOut[3] = abUnsealedPadded[3]; + lpUnsealedGckOut[4] = abUnsealedPadded[5]; + lpUnsealedGckOut[5] = abUnsealedPadded[6]; + lpUnsealedGckOut[6] = abUnsealedPadded[7]; + lpUnsealedGckOut[7] = abUnsealedPadded[8]; + lpUnsealedGckOut[8] = abUnsealedPadded[10]; + lpUnsealedGckOut[9] = abUnsealedPadded[11]; + + lpGckNOut[0] = abUnsealedPadded[12]; + lpGckNOut[1] = abUnsealedPadded[13]; + + *lpMfOut = + (abUnsealedPadded[14] != (abUnsealedPadded[10] ^ abUnsealedPadded[11] ^ abUnsealedPadded[12] ^ abUnsealedPadded[13])) || + (abUnsealedPadded[9] != (abUnsealedPadded[5] ^ abUnsealedPadded[6] ^ abUnsealedPadded[7] ^ abUnsealedPadded[8])) || + (abUnsealedPadded[4] != (abUnsealedPadded[0] ^ abUnsealedPadded[1] ^ abUnsealedPadded[2] ^ abUnsealedPadded[3])); +} + +void ta91(uint8_t *lpUnsealedGsko, uint8_t *lpGskoVn, uint8_t *lpKey, uint8_t *lpSealedGskoOut) +{ + return ta81(lpUnsealedGsko, lpGskoVn, lpUnsealedGsko + 10, lpKey, lpSealedGskoOut); +} + +void ta92(uint8_t *lpSealedGsko, uint8_t *lpGskoVn, uint8_t *lpKey, uint8_t *lpUnsealedGskoOut, uint8_t *lpMfOut) +{ + return ta82(lpSealedGsko, lpGskoVn, lpKey, lpUnsealedGskoOut, lpMfOut, lpUnsealedGskoOut + 10); +} + + +void tb4(uint8_t *lpDck1, uint8_t *lpDck2, uint8_t *lpDckOut) +{ + int i; + for (i = 0; i < 10; i++) + lpDckOut[i] = lpDck1[i] ^ lpDck2[i]; +} + +void tb5(uint8_t *lpCn, uint8_t *lpLa, uint8_t *lpCc, uint8_t *lpCk, uint8_t *lpEckOut) +{ + uint32_t adwComputedEck[3]; + uint32_t adwInputCk[3]; + + adwInputCk[0] = be16(*(uint16_t *)&lpCk[0]); + adwInputCk[1] = be32(*(uint32_t *)&lpCk[2]); + adwInputCk[2] = be32(*(uint32_t *)&lpCk[6]); + + uint16_t wCn = be16(*(uint16_t *)lpCn); + uint16_t wLa = be16(*(uint16_t *)lpLa); + uint8_t bCc = *lpCc; + + /* + wCn = 12 bits = cn carrier number + wLa = 14 bits = la location area code + bCc = 6 bits = cc color code + + Computes: + [ la:14 cn:12 cc:6 cn:12 cc:6 cn:12 cc:6 cn:12 ] + xor + [ ck:80 ] + */ + + assert((wCn & ~0xFFF) == 0); + assert((wLa & ~0x3FFF) == 0); + assert((bCc & ~0x3F) == 0); + + uint32_t dwMask0, dwMask1, dwMask2; + dwMask0 = (wLa << 2) | (wCn >> 10); + dwMask1 = (wCn << 22) | (bCc << 16) | (wCn << 4) | (bCc >> 2); + dwMask2 = (bCc << 30) | (wCn << 18) | (bCc << 12) | wCn; + + adwComputedEck[0] = adwInputCk[0] ^ dwMask0; + adwComputedEck[1] = adwInputCk[1] ^ dwMask1; + adwComputedEck[2] = adwInputCk[2] ^ dwMask2; + + *(uint16_t *)(&lpEckOut[0]) = be16(adwComputedEck[0]); + *(uint32_t *)(&lpEckOut[2]) = be32(adwComputedEck[1]); + *(uint32_t *)(&lpEckOut[6]) = be32(adwComputedEck[2]); +} + +void tb6(uint8_t *lpSck, uint8_t *lpCn, uint8_t *lpSsi, uint8_t *lpEckOut) +{ + uint32_t adwComputedEck[3]; + uint32_t adwInputSck[3]; + + adwInputSck[0] = be16(*(uint16_t *)&lpSck[0]); + adwInputSck[1] = be32(*(uint32_t *)&lpSck[2]); + adwInputSck[2] = be32(*(uint32_t *)&lpSck[6]); + + uint16_t wCn = be16(*(uint16_t *)lpCn); + uint32_t dwSsi = (be16(*(uint16_t *)lpSsi) << 8) | lpSsi[2]; + + uint32_t dwMask0, dwMask1, dwMask2; + /* + Computes: + [cn:12 ssi:24 cn:12 ssi:24 lsb(ssi):8 ] + xor + [ sck:80 ] + */ + + dwMask0 = (wCn << 4) | (dwSsi >> 20); + dwMask1 = (dwSsi << 12) | wCn; + dwMask2 = (dwSsi << 8) | (dwSsi & 0xff); + + adwComputedEck[0] = adwInputSck[0] ^ dwMask0; + adwComputedEck[1] = adwInputSck[1] ^ dwMask1; + adwComputedEck[2] = adwInputSck[2] ^ dwMask2; + + *(uint16_t *)(&lpEckOut[0]) = be16(adwComputedEck[0]); + *(uint32_t *)(&lpEckOut[2]) = be32(adwComputedEck[1]); + *(uint32_t *)(&lpEckOut[6]) = be32(adwComputedEck[2]); +} + +void tb7(uint8_t *lpGsko, uint8_t *lpEgskoOut) +{ + lpEgskoOut[0] = lpGsko[0]; + lpEgskoOut[1] = lpGsko[1]; + lpEgskoOut[2] = lpGsko[2]; + lpEgskoOut[3] = lpGsko[0] ^ lpGsko[1] ^ lpGsko[2]; + lpEgskoOut[4] = lpGsko[3]; + lpEgskoOut[5] = lpGsko[4]; + lpEgskoOut[6] = lpGsko[5]; + lpEgskoOut[7] = lpGsko[3] ^ lpGsko[4] ^ lpGsko[5]; + lpEgskoOut[8] = lpGsko[6]; + lpEgskoOut[9] = lpGsko[7]; + lpEgskoOut[10] = lpGsko[8]; + lpEgskoOut[11] = lpGsko[6] ^ lpGsko[7] ^ lpGsko[8]; + lpEgskoOut[12] = lpGsko[9]; + lpEgskoOut[13] = lpGsko[10]; + lpEgskoOut[14] = lpGsko[11]; + lpEgskoOut[15] = lpGsko[9] ^ lpGsko[10] ^ lpGsko[11]; +} diff --git a/src/crypto/taa1.h b/src/crypto/taa1.h new file mode 100644 index 0000000..4baff6e --- /dev/null +++ b/src/crypto/taa1.h @@ -0,0 +1,53 @@ +#ifndef HAVE_TAA1_H +#define HAVE_TAA1_H + +#include <inttypes.h> + +#if __BYTE_ORDER == __LITTLE_ENDIAN +#define be32(x) __builtin_bswap32(x) +#define be16(x) __builtin_bswap16(x) +#else +#define be32(x) (x) +#define be16(x) (x) +#endif + + +/* + * transformation functions used by TAxx primitives + */ +void transform_80_to_120(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_80_to_128(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_80_to_120_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_80_to_128_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_88_to_120(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_120_to_88(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_120_to_80_alt(const uint8_t *lpBuffer, uint8_t *lpBufferOut); +void transform_identity(const uint8_t *lpInput, uint8_t *lpOutput); +void transform_identity_inverse(const uint8_t *lpInput, uint8_t *lpOutput); + +/* + * TAxx primitives for authentication, key derivation and sealing functionality + * (see ETSI EN 300 392-7) + */ +void ta11_ta41(uint8_t *lpKeyK, uint8_t *lpChallengeRs, uint8_t *lpKsOut); +void ta12_ta22(uint8_t *lpKeyKs, uint8_t *lpRand, uint8_t *lpResOut, uint8_t *lpDckOut); +void ta21(uint8_t *lpKeyK, uint8_t *lpChallengeRs, uint8_t *lpKspOut); +void ta31(uint8_t *lpUnsealedCck, uint8_t *lpCckId, uint8_t *lpDck, uint8_t *lpSealedCckOut); +void ta32(uint8_t *lpSealedCck, uint8_t *lpCckId, uint8_t *lpDck, uint8_t *lpUnsealedCckOut, uint8_t *lpMfOut); +void ta51(uint8_t *lpUnsealed, uint8_t *lpVn, uint8_t *lpKey, uint8_t *lpKeyN, uint8_t *lpSealedOut); +void ta52(uint8_t *lpSealed, uint8_t *lpKey, uint8_t *lpVn, uint8_t *lpUnsealedOut, uint8_t *lpMfOut, uint8_t *lpKeyNOut); +void ta71(uint8_t *lpGck, uint8_t *lpCck, uint8_t *lpMgckOut); +void ta81(uint8_t *lpUnsealedGck, uint8_t *lpGckVn, uint8_t *lpGckN, uint8_t *lpKey, uint8_t *lpSealedGckOut); +void ta82(uint8_t *lpSealedGck, uint8_t *lpGckVn, uint8_t *lpKey, uint8_t *lpUnsealedGckOut, uint8_t *lpMfOut, uint8_t *lpGckNOut); +void ta91(uint8_t *lpUnsealedGsko, uint8_t *lpGskoVn, uint8_t *lpKey, uint8_t *lpSealedGskoOut); +void ta92(uint8_t *lpSealedGsko, uint8_t *lpGskoVn, uint8_t *lpKey, uint8_t *lpUnsealedGskoOut, uint8_t *lpMfOut); + +/* + * TBxx non-cryptographic primitives also used for authentication and key derivation + */ +void tb4(uint8_t *lpDck1, uint8_t *lpDck2, uint8_t *lpDckOut); +void tb5(uint8_t *lpCn, uint8_t *lpLa, uint8_t *lpCc, uint8_t *lpCk, uint8_t *lpEckOut); +void tb6(uint8_t *lpSck, uint8_t *lpCn, uint8_t *lpSsi, uint8_t *lpEckOut); +void tb7(uint8_t *lpGsko, uint8_t *lpEgskoOut); + +#endif /* HAVE_TAA1_H */ diff --git a/src/crypto/tea1.c b/src/crypto/tea1.c new file mode 100644 index 0000000..02428e3 --- /dev/null +++ b/src/crypto/tea1.c @@ -0,0 +1,139 @@ +/* TETRA TEA1 keystream generator implementation */ +/* + * Copyright (C) 2023 Midnight Blue B.V. + * + * Author: Wouter Bokslag <w.bokslag [ ] midnightblue [ ] nl> + * + * SPDX-License-Identifier: AGPL-3.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * See the COPYING file in the main directory for details. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <string.h> + +#include "tea1.h" + + +const uint16_t g_awTea1LutA[8] = { 0xDA86, 0x85E9, 0x29B5, 0x2BC6, 0x8C6B, 0x974C, 0xC671, 0x93E2 }; +const uint16_t g_awTea1LutB[8] = { 0x85D6, 0x791A, 0xE985, 0xC671, 0x2B9C, 0xEC92, 0xC62B, 0x9C47 }; +const uint8_t g_abTea1Sbox[256] = { + 0x9B, 0xF8, 0x3B, 0x72, 0x75, 0x62, 0x88, 0x22, 0xFF, 0xA6, 0x10, 0x4D, 0xA9, 0x97, 0xC3, 0x7B, + 0x9F, 0x78, 0xF3, 0xB6, 0xA0, 0xCC, 0x17, 0xAB, 0x4A, 0x41, 0x8D, 0x89, 0x25, 0x87, 0xD3, 0xE3, + 0xCE, 0x47, 0x35, 0x2C, 0x6D, 0xFC, 0xE7, 0x6A, 0xB8, 0xB7, 0xFA, 0x8B, 0xCD, 0x74, 0xEE, 0x11, + 0x23, 0xDE, 0x39, 0x6C, 0x1E, 0x8E, 0xED, 0x30, 0x73, 0xBE, 0xBB, 0x91, 0xCA, 0x69, 0x60, 0x49, + 0x5F, 0xB9, 0xC0, 0x06, 0x34, 0x2A, 0x63, 0x4B, 0x90, 0x28, 0xAC, 0x50, 0xE4, 0x6F, 0x36, 0xB0, + 0xA4, 0xD2, 0xD4, 0x96, 0xD5, 0xC9, 0x66, 0x45, 0xC5, 0x55, 0xDD, 0xB2, 0xA1, 0xA8, 0xBF, 0x37, + 0x32, 0x2B, 0x3E, 0xB5, 0x5C, 0x54, 0x67, 0x92, 0x56, 0x4C, 0x20, 0x6B, 0x42, 0x9D, 0xA7, 0x58, + 0x0E, 0x52, 0x68, 0x95, 0x09, 0x7F, 0x59, 0x9C, 0x65, 0xB1, 0x64, 0x5E, 0x4F, 0xBA, 0x81, 0x1C, + 0xC2, 0x0C, 0x02, 0xB4, 0x31, 0x5B, 0xFD, 0x1D, 0x0A, 0xC8, 0x19, 0x8F, 0x83, 0x8A, 0xCF, 0x33, + 0x9E, 0x3A, 0x80, 0xF2, 0xF9, 0x76, 0x26, 0x44, 0xF1, 0xE2, 0xC4, 0xF5, 0xD6, 0x51, 0x46, 0x07, + 0x14, 0x61, 0xF4, 0xC1, 0x24, 0x7A, 0x94, 0x27, 0x00, 0xFB, 0x04, 0xDF, 0x1F, 0x93, 0x71, 0x53, + 0xEA, 0xD8, 0xBD, 0x3D, 0xD0, 0x79, 0xE6, 0x7E, 0x4E, 0x9A, 0xD7, 0x98, 0x1B, 0x05, 0xAE, 0x03, + 0xC7, 0xBC, 0x86, 0xDB, 0x84, 0xE8, 0xD1, 0xF7, 0x16, 0x21, 0x6E, 0xE5, 0xCB, 0xA3, 0x1A, 0xEC, + 0xA2, 0x7D, 0x18, 0x85, 0x48, 0xDA, 0xAA, 0xF0, 0x08, 0xC6, 0x40, 0xAD, 0x57, 0x0D, 0x29, 0x82, + 0x7C, 0xE9, 0x8C, 0xFE, 0xDC, 0x0F, 0x2D, 0x3C, 0x2E, 0xF6, 0x15, 0x2F, 0xAF, 0xE1, 0xEB, 0x3F, + 0x99, 0x43, 0x13, 0x0B, 0xE0, 0xA5, 0x12, 0x77, 0x5D, 0xB3, 0x38, 0xD9, 0xEF, 0x5A, 0x01, 0x70}; + +uint64_t tea1_expand_iv(uint32_t dwShortIv) +{ + uint32_t dwXorred = dwShortIv ^ 0x96724FA1; + dwXorred = (dwXorred << 8) | (dwXorred >> 24); + uint64_t qwIv = ((uint64_t)dwShortIv << 32) | dwXorred; + return (qwIv >> 8) | (qwIv << 56); +} + +uint8_t tea1_state_word_to_newbyte(uint16_t wSt, const uint16_t *awLut) +{ + uint8_t bSt0 = wSt; + uint8_t bSt1 = wSt >> 8; + uint8_t bDist; + uint8_t bOut = 0; + + for (int i = 0; i < 8; i++) { + /* taps on bit 7,0 for bSt0 and bit 1,2 for bSt1 */ + bDist = ((bSt0 >> 7) & 1) | ((bSt0 << 1) & 2) | ((bSt1 << 1) & 12); + if (awLut[i] & (1 << bDist)) + bOut |= 1 << i; + + /* rotate one position */ + bSt0 = ((bSt0 >> 1) | (bSt0 << 7)); + bSt1 = ((bSt1 >> 1) | (bSt1 << 7)); + } + + return bOut; +} + +uint8_t tea1_reorder_state_byte(uint8_t bStByte) +{ + /* simple re-ordering of bits */ + uint8_t bOut = 0; + bOut |= ((bStByte << 6) & 0x40); + bOut |= ((bStByte << 1) & 0x20); + bOut |= ((bStByte << 2) & 0x08); + bOut |= ((bStByte >> 3) & 0x14); + bOut |= ((bStByte >> 2) & 0x01); + bOut |= ((bStByte >> 5) & 0x02); + bOut |= ((bStByte << 4) & 0x80); + return bOut; +} + +int32_t tea1_init_key_register(const uint8_t *lpKey) +{ + int32_t dwResult = 0; + for (int i = 0; i < 10; i++) + dwResult = (dwResult << 8) | g_abTea1Sbox[((dwResult >> 24) ^ lpKey[i] ^ dwResult) & 0xff]; + + return dwResult; +} + +void tea1_inner(uint64_t qwIvReg, uint32_t dwKeyReg, uint32_t dwNumKsBytes, uint8_t *lpKsOut) +{ + uint32_t dwNumSkipRounds = 54; + + for (int i = 0; i < dwNumKsBytes; i++) { + for (int j = 0; j < dwNumSkipRounds; j++) { + /* Step 1: Derive a non-linear feedback byte through sbox and feed back into key register */ + uint8_t bSboxOut = g_abTea1Sbox[((dwKeyReg >> 24) ^ dwKeyReg) & 0xff]; + dwKeyReg = (dwKeyReg << 8) | bSboxOut; + + /* Step 2: Compute 3 bytes derived from current state */ + uint8_t bDerivByte12 = tea1_state_word_to_newbyte((qwIvReg >> 8) & 0xffff, g_awTea1LutA); + uint8_t bDerivByte56 = tea1_state_word_to_newbyte((qwIvReg >> 40) & 0xffff, g_awTea1LutB); + uint8_t bReordByte4 = tea1_reorder_state_byte((qwIvReg >> 32) & 0xff); + + /* Step 3: Combine current state with state derived values, and xor in key derived sbox output */ + uint8_t bNewByte = (bDerivByte56 ^ (qwIvReg >> 56) ^ bReordByte4 ^ bSboxOut) & 0xff; + uint8_t bMixByte = bDerivByte12; + + /* Step 4: Update lfsr: leftshift 8, feed/mix in previously generated bytes */ + qwIvReg = ((qwIvReg << 8) ^ ((uint64_t)bMixByte << 32)) | bNewByte; + } + + lpKsOut[i] = (qwIvReg >> 56); + dwNumSkipRounds = 19; + } +} + +void tea1(uint32_t dwFrameNumbers, const uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut) +{ + /* Initialize IV and key register */ + uint64_t qwIvReg = tea1_expand_iv(dwFrameNumbers); + uint32_t dwKeyReg = tea1_init_key_register(lpKey); + + /* Invoke actual TEA1 core function */ + tea1_inner(qwIvReg, dwKeyReg, dwNumKsBytes, lpKsOut); +} diff --git a/src/crypto/tea1.h b/src/crypto/tea1.h new file mode 100644 index 0000000..855b580 --- /dev/null +++ b/src/crypto/tea1.h @@ -0,0 +1,9 @@ +#ifndef HAVE_TEA1_H +#define HAVE_TEA1_H + +#include <inttypes.h> + + +void tea1(uint32_t dwFrameNumbers, const uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut); + +#endif /* HAVE_TEA1_H */ diff --git a/src/crypto/tea2.c b/src/crypto/tea2.c new file mode 100644 index 0000000..9b89d4e --- /dev/null +++ b/src/crypto/tea2.c @@ -0,0 +1,130 @@ +/* TETRA TEA2 keystream generator implementation */ +/* + * Copyright (C) 2023 Midnight Blue B.V. + * + * Author: Wouter Bokslag <w.bokslag [ ] midnightblue [ ] nl> + * + * SPDX-License-Identifier: AGPL-3.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * See the COPYING file in the main directory for details. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <string.h> + +#include "tea2.h" + + +const uint16_t g_abTea2LutA[8] = { 0x2579, 0x86E5, 0xB6C8, 0x31D6, 0x7394, 0x934D, 0x638E, 0xC68B }; +const uint16_t g_abTea2LutB[8] = { 0xD68A, 0x97A1, 0xB2C9, 0x239E, 0x9C71, 0x36E8, 0xC9B2, 0x6CD1 }; +const uint8_t g_abTea2Sbox[256] = { + 0x62, 0xDA, 0xFD, 0xB6, 0xBB, 0x9C, 0xD8, 0x2A, 0xAB, 0x28, 0x6E, 0x42, 0xE7, 0x1C, 0x78, 0x9E, + 0xFC, 0xCA, 0x81, 0x8E, 0x32, 0x3B, 0xB4, 0xEF, 0x9F, 0x8B, 0xDB, 0x94, 0x0F, 0x9A, 0xA2, 0x96, + 0x1B, 0x7A, 0xFF, 0xAA, 0xC5, 0xD6, 0xBC, 0x24, 0xDF, 0x44, 0x03, 0x09, 0x0B, 0x57, 0x90, 0xBA, + 0x7F, 0x1F, 0xCF, 0x71, 0x98, 0x07, 0xF8, 0xA1, 0x60, 0xF7, 0x52, 0x8D, 0xE5, 0xD7, 0x69, 0x87, + 0x14, 0xED, 0x92, 0xEB, 0xB3, 0x2F, 0xE9, 0x3D, 0xC6, 0x50, 0x5A, 0xA7, 0x45, 0x18, 0x11, 0xC4, + 0xCE, 0xAC, 0xF4, 0x1D, 0x82, 0x54, 0x3E, 0x49, 0xD5, 0xEE, 0x84, 0x35, 0x41, 0x3A, 0xEC, 0x34, + 0x17, 0xE0, 0xC9, 0xFE, 0xE8, 0xCB, 0xE6, 0xAE, 0x68, 0xE2, 0x6B, 0x46, 0xC8, 0x47, 0xB2, 0xE3, + 0x97, 0x10, 0x0E, 0xB8, 0x76, 0x5B, 0xBE, 0xF5, 0xA6, 0x3C, 0x8F, 0xF6, 0xD1, 0xAF, 0xC0, 0x5E, + 0x7E, 0xCD, 0x7C, 0x51, 0x6D, 0x74, 0x2C, 0x16, 0xF2, 0xA5, 0x65, 0x64, 0x58, 0x72, 0x1E, 0xF1, + 0x04, 0xA8, 0x13, 0x53, 0x31, 0xB1, 0x20, 0xD3, 0x75, 0x5F, 0xA4, 0x56, 0x06, 0x8A, 0x8C, 0xD9, + 0x70, 0x12, 0x29, 0x61, 0x4F, 0x4C, 0x15, 0x05, 0xD2, 0xBD, 0x7D, 0x9B, 0x99, 0x83, 0x2B, 0x25, + 0xD0, 0x23, 0x48, 0x3F, 0xB0, 0x2E, 0x0D, 0x0C, 0xC7, 0xCC, 0xB7, 0x5C, 0xF0, 0xBF, 0x2D, 0x4E, + 0x40, 0x39, 0x9D, 0x21, 0x37, 0x77, 0x73, 0x4B, 0x4D, 0x5D, 0xFA, 0xDE, 0x00, 0x80, 0x85, 0x6F, + 0x22, 0x91, 0xDC, 0x26, 0x38, 0xE4, 0x4A, 0x79, 0x6A, 0x67, 0x93, 0xF3, 0xFB, 0x19, 0xA0, 0x7B, + 0xF9, 0x95, 0x89, 0x66, 0xB9, 0xD4, 0xC1, 0xDD, 0x63, 0x33, 0xE1, 0xC3, 0xB5, 0xA3, 0xC2, 0x27, + 0x0A, 0x88, 0xA9, 0x1A, 0x6C, 0x43, 0xEA, 0xAD, 0x30, 0x86, 0x36, 0x59, 0x08, 0x55, 0x01, 0x02 +}; + + +static uint64_t tea2_expand_iv(uint32_t dwFrameNumbers) +{ + uint32_t dwXorred = dwFrameNumbers ^ 0x5A6E3278; + dwXorred = (dwXorred << 8) | (dwXorred >> 24); + uint64_t qwIv = ((uint64_t)dwFrameNumbers << 32) | dwXorred; + return (qwIv >> 8) | (qwIv << 56); +} + +static uint8_t tea2_state_word_to_newbyte(uint16_t wSt, const uint16_t *awLut) +{ + + uint8_t bSt0 = wSt; + uint8_t bSt1 = wSt >> 8; + uint8_t bDist; + uint8_t bOut = 0; + + for (int i = 0; i < 8; i++) { + /* taps on bit 0,2 for bSt0 and bit 0,7 for bSt1 */ + bDist = ((bSt0 >> 1) & 0x1) | ((bSt0 >> 1) & 0x2) | ((bSt1 >> 5) & 0x4) | ((bSt1 << 3) & 0x8); + if (awLut[i] & (1 << bDist)) + bOut |= 1 << i; + + /* rotate one position */ + bSt0 = ((bSt0 >> 1) | (bSt0 << 7)); + bSt1 = ((bSt1 >> 1) | (bSt1 << 7)); + } + + return bOut; +} + +static uint8_t tea2_reorder_state_byte(uint8_t bStByte) +{ + /* simple re-ordering of bits */ + uint8_t bOut = 0; + bOut |= ((bStByte << 6) & 0x40); + bOut |= ((bStByte << 3) & 0x10); + bOut |= ((bStByte >> 2) & 0x01); + bOut |= ((bStByte << 2) & 0x20); + bOut |= ((bStByte << 3) & 0x80); + bOut |= ((bStByte >> 4) & 0x02); + bOut |= ((bStByte >> 3) & 0x08); + bOut |= ((bStByte >> 5) & 0x04); + return bOut; +} + +void tea2(uint32_t dwFrameNumbers, uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut) +{ + uint8_t abKeyReg[10]; + uint32_t dwNumSkipRounds = 51; + + /* init registers */ + uint64_t qwIvReg = tea2_expand_iv(dwFrameNumbers); + memcpy(abKeyReg, lpKey, 10); + + for (int i = 0; i < dwNumKsBytes; i++) { + for (int j = 0; j < dwNumSkipRounds; j++) { + /* Step 1: Derive a non-linear feedback byte through sbox and feed back into key register */ + uint8_t bSboxOut = g_abTea2Sbox[abKeyReg[0] ^ abKeyReg[7]]; + memmove(abKeyReg, abKeyReg + 1, 9); + abKeyReg[9] = bSboxOut; + + /* Step 2: Compute 3 bytes derived from current state */ + uint8_t bDerivByte01 = tea2_state_word_to_newbyte((qwIvReg >> 0) & 0xffff, g_abTea2LutA); + uint8_t bDerivByte34 = tea2_state_word_to_newbyte((qwIvReg >> 24) & 0xffff, g_abTea2LutB); + uint8_t bReordByte5 = tea2_reorder_state_byte((qwIvReg >> 40) & 0xff); + + /* Step 3: Combine current state with state derived values, and xor in key derived sbox output */ + uint8_t bNewByte = ((qwIvReg >> 56) ^ (qwIvReg >> 16) ^ bReordByte5 ^ bDerivByte01 ^ bSboxOut) & 0xff; + uint8_t bMixByte = bDerivByte34; + + /* Step 4: Update lfsr: leftshift 8, feed/mix in previously generated bytes */ + qwIvReg = ((qwIvReg << 8) ^ ((uint64_t)bMixByte << 24)) | bNewByte; + } + + lpKsOut[i] = qwIvReg >> 56; + dwNumSkipRounds = 19; + } +} diff --git a/src/crypto/tea2.h b/src/crypto/tea2.h new file mode 100644 index 0000000..3a52d52 --- /dev/null +++ b/src/crypto/tea2.h @@ -0,0 +1,8 @@ +#ifndef HAVE_TEA2_H +#define HAVE_TEA2_H + +#include <inttypes.h> + +void tea2(uint32_t dwFrameNumbers, uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut); + +#endif /* HAVE_TEA2_H */ diff --git a/src/crypto/tea3.c b/src/crypto/tea3.c new file mode 100644 index 0000000..cf5e9b4 --- /dev/null +++ b/src/crypto/tea3.c @@ -0,0 +1,127 @@ +/* TETRA TEA3 keystream generator implementation */ +/* + * Copyright (C) 2023 Midnight Blue B.V. + * + * Author: Wouter Bokslag <w.bokslag [ ] midnightblue [ ] nl> + * + * SPDX-License-Identifier: AGPL-3.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * See the COPYING file in the main directory for details. + */ + +#include <stdio.h> +#include <inttypes.h> +#include <string.h> + +#include "tea3.h" + + +const uint16_t g_awTea3LutA[8] = { 0x92A7, 0xA761, 0x974C, 0x6B8C, 0x29CE, 0x176C, 0x39D4, 0x7463 }; +const uint16_t g_awTea3LutB[8] = { 0x9D58, 0xA46D, 0x176C, 0x79C4, 0xC62B, 0xB2C9, 0x4D93, 0x2E93 }; +const uint8_t g_abTea3Sbox[256] = { + 0x7D, 0xBF, 0x7B, 0x92, 0xAE, 0x7C, 0xF2, 0x10, 0x5A, 0x0F, 0x61, 0x7A, 0x98, 0x76, 0x07, 0x64, + 0xEE, 0x89, 0xF7, 0xBA, 0xC2, 0x02, 0x0D, 0xE8, 0x56, 0x2E, 0xCA, 0x58, 0xC0, 0xFA, 0x2A, 0x01, + 0x57, 0x6E, 0x3F, 0x4B, 0x9C, 0xDA, 0xA6, 0x5B, 0x41, 0x26, 0x50, 0x24, 0x3E, 0xF8, 0x0A, 0x86, + 0xB6, 0x5C, 0x34, 0xE9, 0x06, 0x88, 0x1F, 0x39, 0x33, 0xDF, 0xD9, 0x78, 0xD8, 0xA8, 0x51, 0xB2, + 0x09, 0xCD, 0xA1, 0xDD, 0x8E, 0x62, 0x69, 0x4D, 0x23, 0x2B, 0xA9, 0xE1, 0x53, 0x94, 0x90, 0x1E, + 0xB4, 0x3B, 0xF9, 0x4E, 0x36, 0xFE, 0xB5, 0xD1, 0xA2, 0x8D, 0x66, 0xCE, 0xB7, 0xC4, 0x60, 0xED, + 0x96, 0x4F, 0x31, 0x79, 0x35, 0xEB, 0x8F, 0xBB, 0x54, 0x14, 0xCB, 0xDE, 0x6B, 0x2D, 0x19, 0x82, + 0x80, 0xAC, 0x17, 0x05, 0xFF, 0xA4, 0xCF, 0xC6, 0x6F, 0x65, 0xE6, 0x74, 0xC8, 0x93, 0xF4, 0x7E, + 0xF3, 0x43, 0x9F, 0x71, 0xAB, 0x9A, 0x0B, 0x87, 0x55, 0x70, 0x0C, 0xAD, 0xCC, 0xA5, 0x44, 0xE7, + 0x46, 0x45, 0x03, 0x30, 0x1A, 0xEA, 0x67, 0x99, 0xDB, 0x4A, 0x42, 0xD7, 0xAA, 0xE4, 0xC2, 0xD5, + 0xF0, 0x77, 0x20, 0xC3, 0x3C, 0x16, 0xB9, 0xE2, 0xEF, 0x6C, 0x3D, 0x1B, 0x22, 0x84, 0x2F, 0x81, + 0x1D, 0xB1, 0x3A, 0xE5, 0x73, 0x40, 0xD0, 0x18, 0xC7, 0x6A, 0x9E, 0x91, 0x48, 0x27, 0x95, 0x72, + 0x68, 0x0E, 0x00, 0xFC, 0xC5, 0x5F, 0xF1, 0xF5, 0x38, 0x11, 0x7F, 0xE3, 0x5E, 0x13, 0xAF, 0x37, + 0xE0, 0x8A, 0x49, 0x1C, 0x21, 0x47, 0xD4, 0xDC, 0xB0, 0xEC, 0x83, 0x28, 0xB8, 0xF6, 0xA7, 0xC9, + 0x63, 0x59, 0xBD, 0x32, 0x85, 0x08, 0xBE, 0xD3, 0xFD, 0x4C, 0x2C, 0xFB, 0xA0, 0xC1, 0x9D, 0xB3, + 0x52, 0x8C, 0x5D, 0x29, 0x6D, 0x04, 0xBC, 0x25, 0x15, 0x8B, 0x12, 0x9B, 0xD6, 0x75, 0xA3, 0x97 +}; + + +static uint64_t tea3_compute_iv(uint32_t dwFrameNumbers) +{ + uint32_t dwXorred = dwFrameNumbers ^ 0xC43A7D51; + dwXorred = (dwXorred << 8) | (dwXorred >> 24); + uint64_t qwIv = ((uint64_t)dwFrameNumbers << 32) | dwXorred; + return (qwIv >> 8) | (qwIv << 56); +} + +static uint8_t tea3_state_word_to_newbyte(uint16_t wSt, const uint16_t *awLut) +{ + uint8_t bSt0 = wSt; + uint8_t bSt1 = wSt >> 8; + + uint8_t bDist; + uint8_t bOut = 0; + + for (int i = 0; i < 8; i++) { + /* taps on bit 5,6 for bSt0 and bit 5,6 for bSt1 */ + bDist = ((bSt0 >> 5) & 3) | ((bSt1 >> 3) & 12); + if (awLut[i] & (1 << bDist)) + bOut |= 1 << i; + + /* rotate one position */ + bSt0 = ((bSt0 >> 1) | (bSt0 << 7)); + bSt1 = ((bSt1 >> 1) | (bSt1 << 7)); + } + + return bOut; +} + +static uint8_t tea3_reorder_state_byte(uint8_t bStByte) +{ + /* simple re-ordering of bits */ + uint8_t bOut = 0; + bOut |= ((bStByte << 6) & 0x40); + bOut |= ((bStByte << 1) & 0x20); + bOut |= ((bStByte << 2) & 0x98); + bOut |= ((bStByte >> 4) & 0x04); + bOut |= ((bStByte >> 3) & 0x01); + bOut |= ((bStByte >> 6) & 0x02); + return bOut; +} + +void tea3(uint32_t dwFrameNumbers, uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut) +{ + uint8_t abKeyReg[10]; + uint32_t dwNumSkipRounds = 51; + + /* init registers */ + uint64_t qwIvReg = tea3_compute_iv(dwFrameNumbers); + memcpy(abKeyReg, lpKey, 10); + + for (int i = 0; i < dwNumKsBytes; i++) { + for (int j = 0; j < dwNumSkipRounds; j++) { + /* Step 1: Derive a non-linear feedback byte through sbox and feed back into key register */ + uint8_t bSboxOut = g_abTea3Sbox[abKeyReg[7] ^ abKeyReg[2]] ^ abKeyReg[0]; + memmove(abKeyReg, abKeyReg + 1, 9); + abKeyReg[9] = bSboxOut; + + /* Step 2: Compute 3 bytes derived from current state */ + uint8_t bDerivByte12 = tea3_state_word_to_newbyte((qwIvReg >> 8) & 0xffff, g_awTea3LutA); + uint8_t bDerivByte56 = tea3_state_word_to_newbyte((qwIvReg >> 40) & 0xffff, g_awTea3LutB); + uint8_t bReordByte4 = tea3_reorder_state_byte((qwIvReg >> 32) & 0xff); + + /* Step 3: Combine current state with state derived values, and xor in key derived sbox output */ + uint8_t bNewByte = ((qwIvReg >> 56) ^ bReordByte4 ^ bDerivByte12 ^ bSboxOut) & 0xff; + uint8_t bMixByte = bDerivByte56; + + /* Step 4: Update lfsr: leftshift 8, feed/mix in previously generated bytes */ + qwIvReg = ((qwIvReg << 8) ^ ((uint64_t)bMixByte << 40)) | bNewByte; + } + lpKsOut[i] = (qwIvReg >> 56); + dwNumSkipRounds = 19; + } +} diff --git a/src/crypto/tea3.h b/src/crypto/tea3.h new file mode 100644 index 0000000..4a6c7a4 --- /dev/null +++ b/src/crypto/tea3.h @@ -0,0 +1,8 @@ +#ifndef HAVE_TEA3_H +#define HAVE_TEA3_H + +#include <inttypes.h> + +void tea3(uint32_t dwFrameNumbers, uint8_t *lpKey, uint32_t dwNumKsBytes, uint8_t *lpKsOut); + +#endif /* HAVE_TEA3_H */ diff --git a/src/crypto/tetra_crypto.c b/src/crypto/tetra_crypto.c index d7df293..35a5a39 100644 --- a/src/crypto/tetra_crypto.c +++ b/src/crypto/tetra_crypto.c @@ -33,6 +33,11 @@ #include <phy/tetra_burst.h> #include "tetra_crypto.h" +#include "tea1.h" +#include "tea2.h" +#include "tea3.h" +#include "taa1.h" + struct tetra_crypto_database _tcdb, *tcdb = &_tcdb; @@ -169,23 +174,30 @@ uint8_t cn[2] = {(tcs->cn >> 8) & 0xFF, tcs->cn & 0xFF}; uint8_t la[2] = {(tcs->la >> 8) & 0xFF, tcs->la & 0xFF}; uint8_t cc[1] = {tcs->cc & 0xFF}; - /* TODO FIXME add call to TB5 to derive eck */ + tb5(cn, la, cc, key->key, eck); /* Generate keystream with required KSG */ switch (key->network_info->ksg_type) { - /* TODO FIXME add cases/calls to TEA keystream generator functions */ + case KSG_TEA1: + tea1(iv, eck, num_bytes, ks_bytes); + break; + + case KSG_TEA2: + tea2(iv, eck, num_bytes, ks_bytes); + break; + + case KSG_TEA3: + tea3(iv, eck, num_bytes, ks_bytes); + break; + default: fprintf(stderr, "tetra_crypto: KSG type %d not supported\n", key->network_info->ksg_type); return false; } - for (int i = 0; i < num_bytes; i++) - for (int j = 0; j < 8; j++) - ks_out[i * 8 + j] = (ks_bytes[i] >> (7-j)) & 1; - /* Expand keystream bytes into ubit format */ for (int i = 0; i < num_bits; i++) - ks_out[i] = (ks_bytes[num_bits / 8] >> (7-(num_bits % 8))) & 1; + ks_out[i] = (ks_bytes[i / 8] >> (7-(i % 8))) & 1; return true; } @@ -233,8 +245,8 @@ for (int i = 0; i < ct_len; i++) ct_start[i] = ct_start[i] ^ ks[i + ks_skip_bits]; - printf("tetra_crypto: addr %8d -> key %4d, time %5d/%s, tmpdu offset %d, decrypting %d bits\n", - key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time), tmpdu_offset, ct_len); + // printf("tetra_crypto: addr %8d -> key %4d, time %5d/%s, tmpdu offset %d, decrypting %d bits\n", + // key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time), tmpdu_offset, ct_len); return true; } @@ -264,8 +276,8 @@ type1_block[i + 139] = type1_block[i + 139] ^ ks[i + 137]; } - printf("tetra_crypto: addr %8d -> key %4d, time %5d/%s, decrypted voice\n", - key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time)); + // printf("tetra_crypto: addr %8d -> key %4d, time %5d/%s, decrypted voice\n", + // key->addr, key->index, tcs->hn, tetra_tdma_time_dump(tdma_time)); return true; } @@ -277,12 +289,12 @@ * * network mcc 123 mnc 456 ksg_type 1 security_class 2 * - ksg_type: decimal, see enum tetra_ksg_type - * - security_class: 2 for SCK, 3 for CCK (and DCK per ISSI) + * - security_class: 2 for SCK, 3 for CCK+DCK * * key mcc 123 mnc 456 addr 00000000 key_type 1 key_num 002 key 1234deadbeefcafebabe - * - addr: decimal, leave zero for key type 1 (CCK/SCK) + * - addr: decimal, only relevant for DCK/MGCK/GCK, also, currently unimplemented * - key_type: 1 CCK/SCK, 2 DCK, 3 MGCK, 4 GCK - * - key_num: SCK_VN or group key number depending on type + * - key_num: SCK_VN or group key number depending on type, currently unimplemented * - key: 80-bit key hex string */ -- To view, visit https://gerrit.osmocom.org/c/osmo-tetra/+/34169 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-tetra Gerrit-Branch: master Gerrit-Change-Id: I0c0227cf5b747bd5032602390175b898173f6ae6 Gerrit-Change-Number: 34169 Gerrit-PatchSet: 1 Gerrit-Owner: wbokslag <w.bokslag(a)midnightblue.nl> Gerrit-MessageType: newchange

1 year, 11 months

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[S] Change in libosmo-netif[master]: stream: Use new flag OSMO_SOCK_F_SCTP_ASCONF_SUPPORTED for SCTP sockets

by daniel

Attention is currently required from: laforge, pespin. daniel has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-netif/+/34114 ) Change subject: stream: Use new flag OSMO_SOCK_F_SCTP_ASCONF_SUPPORTED for SCTP sockets ...................................................................... Patch Set 2: Code-Review+2 -- To view, visit https://gerrit.osmocom.org/c/libosmo-netif/+/34114 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-netif Gerrit-Branch: master Gerrit-Change-Id: I807b3748b8535d8e75ceea812d7baaf153fa1d60 Gerrit-Change-Number: 34114 Gerrit-PatchSet: 2 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Wed, 23 Aug 2023 07:25:59 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

1 year, 11 months

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[S] Change in libosmo-gprs[master]: rlcmac: Move FN related helper functions to private header inside lib...

by fixeria

Attention is currently required from: pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/34168 ) Change subject: rlcmac: Move FN related helper functions to private header inside libosmo-gprs ...................................................................... Patch Set 2: Code-Review+2 -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/34168 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I87393239b05a1c11498323139866aec9f6550f3b Gerrit-Change-Number: 34168 Gerrit-PatchSet: 2 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 18:01:55 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

1 year, 11 months

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[S] Change in libosmo-gprs[master]: tbf_ul_ass: Don't check USF during SingleBlock Allocation

by fixeria

Attention is currently required from: pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/34166 ) Change subject: tbf_ul_ass: Don't check USF during SingleBlock Allocation ...................................................................... Patch Set 3: Code-Review+2 -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/34166 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: Icc2c17dc1933ad95da1b6b050f38a769909b23e5 Gerrit-Change-Number: 34166 Gerrit-PatchSet: 3 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 18:01:06 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

1 year, 11 months

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[M] Change in libosmo-gprs[master]: rlcmac: ul_tbf: Implement TBF_Starting time (phase1)

by fixeria

Attention is currently required from: pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/34046 ) Change subject: rlcmac: ul_tbf: Implement TBF_Starting time (phase1) ...................................................................... Patch Set 8: Code-Review+1 (1 comment) Commit Message: https://gerrit.osmocom.org/c/libosmo-gprs/+/34046/comment/5bf1d075_7609ab3f PS8, Line 9: since lower layers are always : sending hardcoded fn=0 We already have a patch fixing this in review, so not sure if this should be in the commit message. -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/34046 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: If6b7766ee1ba6667db4e54e897f376f5b27ad73d Gerrit-Change-Number: 34046 Gerrit-PatchSet: 8 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 17:59:39 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

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[M] Change in libosmo-gprs[master]: rlcmac: ul_tbf: Factor out function configuring TBF to lower layers

by fixeria

Attention is currently required from: pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/34045 ) Change subject: rlcmac: ul_tbf: Factor out function configuring TBF to lower layers ...................................................................... Patch Set 8: Code-Review+2 -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/34045 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I174327b25b726662a6b5902008e205ddb3de2fe0 Gerrit-Change-Number: 34045 Gerrit-PatchSet: 8 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 17:55:35 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

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[S] Change in libosmo-gprs[master]: rlcmac: l1ctl_prim: add 'start_rfn' field to cfg_{ul,dl}_tbf_req

by fixeria

Attention is currently required from: pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/33230 ) Change subject: rlcmac: l1ctl_prim: add 'start_rfn' field to cfg_{ul,dl}_tbf_req ...................................................................... Patch Set 5: Code-Review+2 -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/33230 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I27a7a896fe3839fa4f9b8cd9500c4ab7867bbaa0 Gerrit-Change-Number: 33230 Gerrit-PatchSet: 5 Gerrit-Owner: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 17:53:51 +0000 Gerrit-HasComments: No Gerrit-Has-Labels: Yes Gerrit-MessageType: comment

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[M] Change in libosmo-gprs[master]: rlcmac: Fix Starting Time rfn->fn calculation

by fixeria

Attention is currently required from: osmith, pespin. fixeria has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/34044 ) Change subject: rlcmac: Fix Starting Time rfn->fn calculation ...................................................................... Patch Set 6: Code-Review+1 (3 comments) File src/rlcmac/rlcmac_dec.c: https://gerrit.osmocom.org/c/libosmo-gprs/+/34044/comment/169eaa6c_4c70e47b PS6, Line 437: t3 = tbf_start_time->N51 Are you sure this is correct? On the left (before this patch) `t3` field was assigned the value of `tbf_start_time->N26`, but now it's `tbf_start_time->N51`. Ah, now it matches what `gsm_fn2gsmtime()` is doing, so looks correct. Nevermind. https://gerrit.osmocom.org/c/libosmo-gprs/+/34044/comment/ba487d5a_6fce381f PS6, Line 439: 51 * OSMO_MOD_FLR((t3 - t2), 26) + t3 + 51 * 26 * t1p; AFAICS, this is pretty much a copy-paste from libosmogsm. Is there a reason to reinvent `gsm_gsmtime2fn()` here? Can't we keep the function as it was, and simply do `gsm_rfn2fn`? ``` const uint16_t rfn = gsm_gsmtime2fn(&g_time); const uint32_t fn = gsm_rfn2fn(rfn, curr_fn); ``` File tests/rlcmac/rlcmac_types_test.c: https://gerrit.osmocom.org/c/libosmo-gprs/+/34044/comment/d0ec9690_54c93307 PS3, Line 54: printf > This allows easily separating internal logging from test specific logging. […] Not blocking, marking as resolved. -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/34044 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I00741289333853a8db472950ee2ac38dc2c74fd3 Gerrit-Change-Number: 34044 Gerrit-PatchSet: 6 Gerrit-Owner: pespin <pespin(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Reviewer: pespin <pespin(a)sysmocom.de> Gerrit-Attention: osmith <osmith(a)sysmocom.de> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Tue, 22 Aug 2023 17:53:11 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: Yes Comment-In-Reply-To: osmith <osmith(a)sysmocom.de> Comment-In-Reply-To: pespin <pespin(a)sysmocom.de> Comment-In-Reply-To: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-MessageType: comment

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