annotate libtomcrypt/src/mac/hmac/hmac_memory.c @ 1902:4a6725ac957c

Revert "Don't include sk keys at all in KEX list" This reverts git commit f972813ecdc7bb981d25b5a63638bd158f1c8e72. The sk algorithms need to remain in the sigalgs list so that they are included in the server-sig-algs ext-info message sent by the server. RFC8308 for server-sig-algs requires that all algorithms are listed (though OpenSSH client 8.4p1 tested doesn't require that)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 24 Mar 2022 13:42:08 +0800
parents 6dba84798cd5
children
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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 hmac_memory.c
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13 HMAC support, process a block of memory, Tom St Denis/Dobes Vandermeer
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14 */
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15
382
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16 #ifdef LTC_HMAC
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17
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18 /**
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19 HMAC a block of memory to produce the authentication tag
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20 @param hash The index of the hash to use
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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 HMAC
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24 @param inlen The length of the data to HMAC (octets)
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25 @param out [out] Destination of the authentication tag
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26 @param outlen [in/out] Max size and resulting size of authentication tag
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27 @return CRYPT_OK if successful
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28 */
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29 int hmac_memory(int hash,
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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 hmac_state *hmac;
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35 int err;
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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 /* make sure hash descriptor is valid */
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43 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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44 return err;
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45 }
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46
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47 /* is there a descriptor? */
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48 if (hash_descriptor[hash].hmac_block != NULL) {
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49 return hash_descriptor[hash].hmac_block(key, keylen, in, inlen, out, outlen);
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50 }
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51
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52 /* nope, so call the hmac functions */
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53 /* allocate ram for hmac state */
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54 hmac = XMALLOC(sizeof(hmac_state));
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55 if (hmac == NULL) {
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56 return CRYPT_MEM;
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57 }
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58
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59 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) {
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60 goto LBL_ERR;
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61 }
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62
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63 if ((err = hmac_process(hmac, in, inlen)) != CRYPT_OK) {
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64 goto LBL_ERR;
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65 }
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66
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67 if ((err = hmac_done(hmac, out, outlen)) != CRYPT_OK) {
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68 goto LBL_ERR;
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69 }
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70
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71 err = CRYPT_OK;
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72 LBL_ERR:
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73 #ifdef LTC_CLEAN_STACK
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74 zeromem(hmac, sizeof(hmac_state));
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75 #endif
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76
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77 XFREE(hmac);
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78 return err;
285
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79 }
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80
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81 #endif
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82
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83
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84 /* ref: $Format:%D$ */
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85 /* git commit: $Format:%H$ */
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86 /* commit time: $Format:%ai$ */