Mercurial > dropbear

annotate libtomcrypt/src/mac/hmac/hmac_memory_multi.c @ 1659:d32bcb5c557d

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Add Ed25519 support (#91) * Add support for Ed25519 as a public key type Ed25519 is a elliptic curve signature scheme that offers better security than ECDSA and DSA and good performance. It may be used for both user and host keys. OpenSSH key import and fuzzer are not supported yet. Initially inspired by Peter Szabo. * Add curve25519 and ed25519 fuzzers * Add import and export of Ed25519 keys
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Wed, 11 Mar 2020 21:09:45 +0500
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 #include <stdarg.h>
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11
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12 /**
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13 @file hmac_memory_multi.c
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14 HMAC support, process multiple blocks of memory, Tom St Denis/Dobes Vandermeer
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15 */
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16
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17 #ifdef LTC_HMAC
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19 /**
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20 HMAC multiple blocks of memory to produce the authentication tag
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21 @param hash The index of the hash to use
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22 @param key The secret key
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23 @param keylen The length of the secret key (octets)
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24 @param out [out] Destination of the authentication tag
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25 @param outlen [in/out] Max size and resulting size of authentication tag
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26 @param in The data to HMAC
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27 @param inlen The length of the data to HMAC (octets)
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28 @param ... tuples of (data,len) pairs to HMAC, terminated with a (NULL,x) (x=don't care)
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29 @return CRYPT_OK if successful
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30 */
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31 int hmac_memory_multi(int hash,
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32 const unsigned char *key, unsigned long keylen,
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33 unsigned char *out, unsigned long *outlen,
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34 const unsigned char *in, unsigned long inlen, ...)
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36 {
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37 hmac_state *hmac;
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38 int err;
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39 va_list args;
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40 const unsigned char *curptr;
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41 unsigned long curlen;
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43 LTC_ARGCHK(key != NULL);
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44 LTC_ARGCHK(in != NULL);
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45 LTC_ARGCHK(out != NULL);
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46 LTC_ARGCHK(outlen != NULL);
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47
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48 /* allocate ram for hmac state */
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49 hmac = XMALLOC(sizeof(hmac_state));
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50 if (hmac == NULL) {
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51 return CRYPT_MEM;
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52 }
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53
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54 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) {
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55 goto LBL_ERR;
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56 }
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57
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58 va_start(args, inlen);
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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59 curptr = in;
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60 curlen = inlen;
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61 for (;;) {
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62 /* process buf */
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63 if ((err = hmac_process(hmac, curptr, curlen)) != CRYPT_OK) {
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64 goto LBL_ERR;
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65 }
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66 /* step to next */
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67 curptr = va_arg(args, const unsigned char*);
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68 if (curptr == NULL) {
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69 break;
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70 }
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71 curlen = va_arg(args, unsigned long);
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72 }
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73 if ((err = hmac_done(hmac, out, outlen)) != CRYPT_OK) {
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74 goto LBL_ERR;
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75 }
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76 LBL_ERR:
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77 #ifdef LTC_CLEAN_STACK
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78 zeromem(hmac, sizeof(hmac_state));
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79 #endif
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80 XFREE(hmac);
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81 va_end(args);
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82 return err;
285
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83 }
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84
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85 #endif
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86
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87
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88 /* ref: $Format:%D$ */
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89 /* git commit: $Format:%H$ */
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90 /* commit time: $Format:%ai$ */