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annotate libtomcrypt/src/pk/rsa/rsa_sign_saltlen_get.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
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11 /**
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12 @file rsa_sign_saltlen_get.c
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13 Retrieve the maximum size of the salt, Steffen Jaeckel.
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14 */
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15
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16 #ifdef LTC_MRSA
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17
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18 /**
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19 Retrieve the maximum possible size of the salt when creating a PKCS#1 PSS signature.
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20 @param padding Type of padding (LTC_PKCS_1_PSS only)
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21 @param hash_idx The index of the desired hash
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22 @param key The RSA key
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23 @return The maximum salt length in bytes or INT_MAX on error.
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24 */
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25 int rsa_sign_saltlen_get_max_ex(int padding, int hash_idx, rsa_key *key)
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26 {
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27 int ret = INT_MAX;
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28 LTC_ARGCHK(key != NULL);
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29
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30 if ((hash_is_valid(hash_idx) == CRYPT_OK) &&
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31 (padding == LTC_PKCS_1_PSS))
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32 {
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33 ret = rsa_get_size(key);
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34 if (ret < INT_MAX)
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35 {
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36 ret -= (hash_descriptor[hash_idx].hashsize + 2);
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37 } /* if */
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38 } /* if */
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39
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40 return ret;
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41 }
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42
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43 #endif
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44
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45 /* ref: $Format:%D$ */
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46 /* git commit: $Format:%H$ */
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47 /* commit time: $Format:%ai$ */