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annotate libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.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
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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 #include "tomcrypt.h"
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11
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12 #ifdef LTC_CHACHA20POLY1305_MODE
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13
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14 /**
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15 Process an entire GCM packet in one call.
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16 @param key The secret key
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17 @param keylen The length of the secret key
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18 @param iv The initialization vector
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19 @param ivlen The length of the initialization vector
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20 @param aad The additional authentication data (header)
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21 @param aadlen The length of the aad
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22 @param in The plaintext
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23 @param inlen The length of the plaintext (ciphertext length is the same)
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24 @param out The ciphertext
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25 @param tag [out] The MAC tag
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26 @param taglen [in/out] The MAC tag length
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27 @param direction Encrypt or Decrypt mode (CHACHA20POLY1305_ENCRYPT or CHACHA20POLY1305_DECRYPT)
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28 @return CRYPT_OK on success
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29 */
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30 int chacha20poly1305_memory(const unsigned char *key, unsigned long keylen,
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31 const unsigned char *iv, unsigned long ivlen,
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32 const unsigned char *aad, unsigned long aadlen,
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33 const unsigned char *in, unsigned long inlen,
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34 unsigned char *out,
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35 unsigned char *tag, unsigned long *taglen,
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36 int direction)
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37 {
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38 chacha20poly1305_state st;
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39 int err;
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40
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41 LTC_ARGCHK(key != NULL);
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42 LTC_ARGCHK(iv != NULL);
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43 LTC_ARGCHK(in != NULL);
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44 LTC_ARGCHK(out != NULL);
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45 LTC_ARGCHK(tag != NULL);
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46
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47 if ((err = chacha20poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; }
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48 if ((err = chacha20poly1305_setiv(&st, iv, ivlen)) != CRYPT_OK) { goto LBL_ERR; }
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49 if (aad && aadlen > 0) {
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50 if ((err = chacha20poly1305_add_aad(&st, aad, aadlen)) != CRYPT_OK) { goto LBL_ERR; }
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51 }
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52 if (direction == CHACHA20POLY1305_ENCRYPT) {
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53 if ((err = chacha20poly1305_encrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; }
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54 }
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55 else if (direction == CHACHA20POLY1305_DECRYPT) {
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56 if ((err = chacha20poly1305_decrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; }
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57 }
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58 else {
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59 err = CRYPT_INVALID_ARG;
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60 goto LBL_ERR;
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61 }
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62 err = chacha20poly1305_done(&st, tag, taglen);
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63 LBL_ERR:
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64 #ifdef LTC_CLEAN_STACK
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65 zeromem(&st, sizeof(chacha20poly1305_state));
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66 #endif
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67 return err;
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68 }
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69
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70 #endif
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71
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72 /* ref: $Format:%D$ */
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73 /* git commit: $Format:%H$ */
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74 /* commit time: $Format:%ai$ */