Mercurial > dropbear

annotate libtomcrypt/src/misc/crypt/crypt_find_cipher_any.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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11 /**
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12 @file crypt_find_cipher_any.c
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13 Find a cipher in the descriptor tables, Tom St Denis
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14 */
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16 /**
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17 Find a cipher flexibly. First by name then if not present by block and key size
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18 @param name The name of the cipher desired
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19 @param blocklen The minimum length of the block cipher desired (octets)
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20 @param keylen The minimum length of the key size desired (octets)
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21 @return >= 0 if found, -1 if not present
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22 */
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23 int find_cipher_any(const char *name, int blocklen, int keylen)
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24 {
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25 int x;
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26
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27 if(name != NULL) {
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28 x = find_cipher(name);
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29 if (x != -1) return x;
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30 }
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32 LTC_MUTEX_LOCK(&ltc_cipher_mutex);
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33 for (x = 0; x < TAB_SIZE; x++) {
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34 if (cipher_descriptor[x].name == NULL) {
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35 continue;
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36 }
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37 if (blocklen <= (int)cipher_descriptor[x].block_length && keylen <= (int)cipher_descriptor[x].max_key_length) {
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38 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
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39 return x;
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40 }
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41 }
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42 LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
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43 return -1;
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44 }
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45
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46 /* ref: $Format:%D$ */
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47 /* git commit: $Format:%H$ */
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48 /* commit time: $Format:%ai$ */