Mercurial > dropbear
annotate libtomcrypt/src/mac/pmac/pmac_process.c @ 1854:cba37fe1ddc8
Fix accidentally committed debug message
Was added Oct 18 2021
"Only redirect stderr after the session login."
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 22 Jan 2022 12:46:08 +0800 |
parents | 6dba84798cd5 |
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 */ |
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9 #include "tomcrypt.h" |
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10 |
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11 /** |
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12 @file pmac_process.c |
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13 PMAC implementation, process data, by Tom St Denis |
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14 */ |
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15 |
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16 |
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17 #ifdef LTC_PMAC |
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18 |
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19 /** |
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20 Process data in a PMAC stream |
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21 @param pmac The PMAC state |
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22 @param in The data to send through PMAC |
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23 @param inlen The length of the data to send through PMAC |
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24 @return CRYPT_OK if successful |
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25 */ |
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26 int pmac_process(pmac_state *pmac, const unsigned char *in, unsigned long inlen) |
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27 { |
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28 int err, n; |
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29 unsigned long x; |
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30 unsigned char Z[MAXBLOCKSIZE]; |
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31 |
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32 LTC_ARGCHK(pmac != NULL); |
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33 LTC_ARGCHK(in != NULL); |
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34 if ((err = cipher_is_valid(pmac->cipher_idx)) != CRYPT_OK) { |
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35 return err; |
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36 } |
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37 |
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38 if ((pmac->buflen > (int)sizeof(pmac->block)) || (pmac->buflen < 0) || |
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39 (pmac->block_len > (int)sizeof(pmac->block)) || (pmac->buflen > pmac->block_len)) { |
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40 return CRYPT_INVALID_ARG; |
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41 } |
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42 |
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43 #ifdef LTC_FAST |
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44 if (pmac->buflen == 0 && inlen > 16) { |
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45 unsigned long y; |
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46 for (x = 0; x < (inlen - 16); x += 16) { |
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47 pmac_shift_xor(pmac); |
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48 for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) { |
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49 *(LTC_FAST_TYPE_PTR_CAST(&Z[y])) = *(LTC_FAST_TYPE_PTR_CAST(&in[y])) ^ *(LTC_FAST_TYPE_PTR_CAST(&pmac->Li[y])); |
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50 } |
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51 if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) { |
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52 return err; |
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53 } |
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54 for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) { |
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55 *(LTC_FAST_TYPE_PTR_CAST(&pmac->checksum[y])) ^= *(LTC_FAST_TYPE_PTR_CAST(&Z[y])); |
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56 } |
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57 in += 16; |
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58 } |
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59 inlen -= x; |
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60 } |
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61 #endif |
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62 |
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63 while (inlen != 0) { |
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64 /* ok if the block is full we xor in prev, encrypt and replace prev */ |
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65 if (pmac->buflen == pmac->block_len) { |
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66 pmac_shift_xor(pmac); |
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67 for (x = 0; x < (unsigned long)pmac->block_len; x++) { |
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68 Z[x] = pmac->Li[x] ^ pmac->block[x]; |
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69 } |
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70 if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) { |
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71 return err; |
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72 } |
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73 for (x = 0; x < (unsigned long)pmac->block_len; x++) { |
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74 pmac->checksum[x] ^= Z[x]; |
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75 } |
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76 pmac->buflen = 0; |
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77 } |
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78 |
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79 /* add bytes */ |
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80 n = MIN(inlen, (unsigned long)(pmac->block_len - pmac->buflen)); |
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81 XMEMCPY(pmac->block + pmac->buflen, in, n); |
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82 pmac->buflen += n; |
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83 inlen -= n; |
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84 in += n; |
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85 } |
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86 |
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87 #ifdef LTC_CLEAN_STACK |
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88 zeromem(Z, sizeof(Z)); |
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89 #endif |
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90 |
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91 return CRYPT_OK; |
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92 } |
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93 |
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94 #endif |
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95 |
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96 /* ref: $Format:%D$ */ |
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97 /* git commit: $Format:%H$ */ |
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98 /* commit time: $Format:%ai$ */ |