Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_memory_multi.c @ 1902:4a6725ac957c

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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 #include <stdarg.h>
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11
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12 #ifdef LTC_HASH_HELPERS
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13 /**
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14 @file hash_memory_multi.c
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15 Hash (multiple buffers) memory helper, Tom St Denis
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16 */
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18 /**
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19 Hash multiple (non-adjacent) blocks of memory at once.
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20 @param hash The index of the hash you wish to use
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21 @param out [out] Where to store the digest
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22 @param outlen [in/out] Max size and resulting size of the digest
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23 @param in The data you wish to hash
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24 @param inlen The length of the data to hash (octets)
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25 @param ... tuples of (data,len) pairs to hash, terminated with a (NULL,x) (x=don't care)
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26 @return CRYPT_OK if successful
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27 */
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28 int hash_memory_multi(int hash, unsigned char *out, unsigned long *outlen,
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29 const unsigned char *in, unsigned long inlen, ...)
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30 {
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31 hash_state *md;
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32 int err;
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33 va_list args;
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34 const unsigned char *curptr;
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35 unsigned long curlen;
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36
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37 LTC_ARGCHK(in != NULL);
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38 LTC_ARGCHK(out != NULL);
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39 LTC_ARGCHK(outlen != NULL);
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40
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41 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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42 return err;
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43 }
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45 if (*outlen < hash_descriptor[hash].hashsize) {
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46 *outlen = hash_descriptor[hash].hashsize;
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47 return CRYPT_BUFFER_OVERFLOW;
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48 }
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49
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50 md = XMALLOC(sizeof(hash_state));
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51 if (md == NULL) {
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52 return CRYPT_MEM;
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53 }
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54
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55 if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
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56 goto LBL_ERR;
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57 }
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58
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59 va_start(args, inlen);
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60 curptr = in;
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61 curlen = inlen;
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62 for (;;) {
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63 /* process buf */
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64 if ((err = hash_descriptor[hash].process(md, curptr, curlen)) != CRYPT_OK) {
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65 goto LBL_ERR;
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66 }
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67 /* step to next */
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68 curptr = va_arg(args, const unsigned char*);
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69 if (curptr == NULL) {
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70 break;
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71 }
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72 curlen = va_arg(args, unsigned long);
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73 }
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74 err = hash_descriptor[hash].done(md, out);
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75 *outlen = hash_descriptor[hash].hashsize;
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76 LBL_ERR:
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77 #ifdef LTC_CLEAN_STACK
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78 zeromem(md, sizeof(hash_state));
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79 #endif
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80 XFREE(md);
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81 va_end(args);
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82 return err;
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83 }
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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84 #endif /* #ifdef LTC_HASH_HELPERS */
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85
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86 /* ref: $Format:%D$ */
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87 /* git commit: $Format:%H$ */
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88 /* commit time: $Format:%ai$ */