Mercurial > dropbear

annotate libtomcrypt/src/mac/hmac/hmac_memory.c @ 1156:a8f4dade70e5

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avoid getpass when not used some systems (like android's bionic) do not provide getpass. you can disable ENABLE_CLI_PASSWORD_AUTH & ENABLE_CLI_INTERACT_AUTH to avoid its use (and rely on pubkey auth), but the link still fails because the support file calls getpass. do not define this func if both of those auth methods are not used.
author Mike Frysinger <vapier@gentoo.org>
date Wed, 21 Oct 2015 22:39:55 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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12
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13 /**
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14 @file hmac_memory.c
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15 HMAC support, process a block of memory, Tom St Denis/Dobes Vandermeer
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16 */
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17
382
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18 #ifdef LTC_HMAC
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19
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20 /**
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21 HMAC a block of memory to produce the authentication tag
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22 @param hash The index of the hash to use
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23 @param key The secret key
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24 @param keylen The length of the secret key (octets)
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25 @param in The data to HMAC
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26 @param inlen The length of the data to HMAC (octets)
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27 @param out [out] Destination of the authentication tag
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28 @param outlen [in/out] Max size and resulting size of authentication tag
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29 @return CRYPT_OK if successful
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30 */
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31 int hmac_memory(int hash,
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32 const unsigned char *key, unsigned long keylen,
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33 const unsigned char *in, unsigned long inlen,
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34 unsigned char *out, unsigned long *outlen)
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35 {
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36 hmac_state *hmac;
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37 int err;
285
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38
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39 LTC_ARGCHK(key != NULL);
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40 LTC_ARGCHK(in != NULL);
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41 LTC_ARGCHK(out != NULL);
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42 LTC_ARGCHK(outlen != NULL);
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43
382
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44 /* make sure hash descriptor is valid */
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45 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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46 return err;
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47 }
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48
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49 /* is there a descriptor? */
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50 if (hash_descriptor[hash].hmac_block != NULL) {
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51 return hash_descriptor[hash].hmac_block(key, keylen, in, inlen, out, outlen);
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52 }
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53
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54 /* nope, so call the hmac functions */
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55 /* allocate ram for hmac state */
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56 hmac = XMALLOC(sizeof(hmac_state));
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57 if (hmac == NULL) {
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58 return CRYPT_MEM;
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59 }
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60
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61 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) {
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62 goto LBL_ERR;
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63 }
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64
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65 if ((err = hmac_process(hmac, in, inlen)) != 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 if ((err = hmac_done(hmac, out, outlen)) != CRYPT_OK) {
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70 goto LBL_ERR;
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71 }
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72
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73 err = CRYPT_OK;
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74 LBL_ERR:
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75 #ifdef LTC_CLEAN_STACK
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76 zeromem(hmac, sizeof(hmac_state));
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77 #endif
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78
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79 XFREE(hmac);
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80 return err;
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81 }
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82
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83 #endif
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84
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85
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86 /* $Source: /cvs/libtom/libtomcrypt/src/mac/hmac/hmac_memory.c,v $ */
382
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87 /* $Revision: 1.6 $ */
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents: 285
diff changeset
88 /* $Date: 2006/11/03 00:39:49 $ */