Mercurial > dropbear

annotate libtomcrypt/src/mac/omac/omac_memory.c @ 1665:7c17995bcdfb

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Improve address logging on early exit messages (#83) Change 'Early exit' and 'Exit before auth' messages to include the IP address & port as part of the message. This allows log scanning utilities such as 'fail2ban' to obtain the offending IP address as part of the failure event instead of extracting the PID from the message and then scanning the log again for match 'child connection from' messages Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com>
date Wed, 18 Mar 2020 15:28:56 +0000
parents 6dba84798cd5
children
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rev   line source
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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 omac_memory.c
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13 OMAC1 support, process a block of memory, Tom St Denis
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14 */
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15
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16 #ifdef LTC_OMAC
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17
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18 /**
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19 OMAC a block of memory
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20 @param cipher The index of the desired cipher
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21 @param key The secret key
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22 @param keylen The length of the secret key (octets)
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23 @param in The data to send through OMAC
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24 @param inlen The length of the data to send through OMAC (octets)
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25 @param out [out] The destination of the authentication tag
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26 @param outlen [in/out] The max size and resulting size of the authentication tag (octets)
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27 @return CRYPT_OK if successful
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28 */
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29 int omac_memory(int cipher,
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30 const unsigned char *key, unsigned long keylen,
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31 const unsigned char *in, unsigned long inlen,
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32 unsigned char *out, unsigned long *outlen)
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33 {
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34 int err;
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35 omac_state *omac;
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36
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37 LTC_ARGCHK(key != NULL);
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38 LTC_ARGCHK(in != NULL);
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39 LTC_ARGCHK(out != NULL);
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40 LTC_ARGCHK(outlen != NULL);
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41
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42 /* is the cipher valid? */
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43 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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44 return err;
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45 }
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46
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47 /* Use accelerator if found */
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48 if (cipher_descriptor[cipher].omac_memory != NULL) {
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49 return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen);
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50 }
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51
285
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52 /* allocate ram for omac state */
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53 omac = XMALLOC(sizeof(omac_state));
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54 if (omac == NULL) {
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55 return CRYPT_MEM;
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56 }
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57
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58 /* omac process the message */
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59 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
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60 goto LBL_ERR;
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61 }
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62 if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) {
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63 goto LBL_ERR;
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64 }
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65 if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) {
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66 goto LBL_ERR;
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67 }
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68
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69 err = CRYPT_OK;
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70 LBL_ERR:
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71 #ifdef LTC_CLEAN_STACK
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72 zeromem(omac, sizeof(omac_state));
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73 #endif
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74
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75 XFREE(omac);
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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76 return err;
285
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77 }
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78
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79 #endif
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80
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81 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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82 /* git commit: $Format:%H$ */
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83 /* commit time: $Format:%ai$ */