Mercurial > dropbear

annotate libtomcrypt/src/encauth/eax/eax_encrypt_authenticate_memory.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
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10 /**
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11 @file eax_encrypt_authenticate_memory.c
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12 EAX implementation, encrypt a block of memory, by Tom St Denis
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13 */
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14 #include "tomcrypt.h"
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15
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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16 #ifdef LTC_EAX_MODE
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17
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18 /**
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19 EAX encrypt and produce an authentication tag
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20 @param cipher The index of the cipher desired
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21 @param key The secret key to use
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22 @param keylen The length of the secret key (octets)
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23 @param nonce The session nonce [use once]
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24 @param noncelen The length of the nonce
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25 @param header The header for the session
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26 @param headerlen The length of the header (octets)
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27 @param pt The plaintext
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28 @param ptlen The length of the plaintext (octets)
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29 @param ct [out] The ciphertext
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30 @param tag [out] The destination tag
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31 @param taglen [in/out] The max size and resulting size of the authentication tag
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32 @return CRYPT_OK if successful
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33 */
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34 int eax_encrypt_authenticate_memory(int cipher,
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35 const unsigned char *key, unsigned long keylen,
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36 const unsigned char *nonce, unsigned long noncelen,
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37 const unsigned char *header, unsigned long headerlen,
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38 const unsigned char *pt, unsigned long ptlen,
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39 unsigned char *ct,
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40 unsigned char *tag, unsigned long *taglen)
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41 {
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42 int err;
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43 eax_state *eax;
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44
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45 LTC_ARGCHK(key != NULL);
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46 LTC_ARGCHK(pt != NULL);
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47 LTC_ARGCHK(ct != NULL);
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48 LTC_ARGCHK(tag != NULL);
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49 LTC_ARGCHK(taglen != NULL);
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50
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51 eax = XMALLOC(sizeof(*eax));
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52
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53 if ((err = eax_init(eax, cipher, key, keylen, nonce, noncelen, header, headerlen)) != CRYPT_OK) {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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54 goto LBL_ERR;
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55 }
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56
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57 if ((err = eax_encrypt(eax, pt, ct, ptlen)) != CRYPT_OK) {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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58 goto LBL_ERR;
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59 }
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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60
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61 if ((err = eax_done(eax, tag, taglen)) != CRYPT_OK) {
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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62 goto LBL_ERR;
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63 }
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64
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65 err = CRYPT_OK;
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66 LBL_ERR:
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67 #ifdef LTC_CLEAN_STACK
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68 zeromem(eax, sizeof(*eax));
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69 #endif
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70
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71 XFREE(eax);
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72
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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73 return err;
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74 }
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75
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76 #endif
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77
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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78 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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79 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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80 /* commit time: $Format:%ai$ */