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annotate libtomcrypt/src/mac/poly1305/poly1305_file.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 e9dba7abd939
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 /* The implementation is based on:
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11 * Public Domain poly1305 from Andrew Moon
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12 * https://github.com/floodyberry/poly1305-donna
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13 */
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14
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15 #include "tomcrypt.h"
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16
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17 #ifdef LTC_POLY1305
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18
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19 /**
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20 POLY1305 a file
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21 @param fname The name of the file you wish to POLY1305
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22 @param key The secret key
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23 @param keylen The length of the secret key
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24 @param mac [out] The POLY1305 authentication tag
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25 @param maclen [in/out] The max size and resulting size of the authentication tag
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26 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
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27 */
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28 int poly1305_file(const char *fname, const unsigned char *key, unsigned long keylen, unsigned char *mac, unsigned long *maclen)
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29 {
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30 #ifdef LTC_NO_FILE
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31 return CRYPT_NOP;
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32 #else
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33 poly1305_state st;
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34 FILE *in;
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35 unsigned char *buf;
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36 size_t x;
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37 int err;
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38
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39 LTC_ARGCHK(fname != NULL);
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40 LTC_ARGCHK(key != NULL);
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41 LTC_ARGCHK(mac != NULL);
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42 LTC_ARGCHK(maclen != NULL);
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43
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44 if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
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45 return CRYPT_MEM;
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46 }
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47
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48 if ((err = poly1305_init(&st, key, keylen)) != CRYPT_OK) {
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49 goto LBL_ERR;
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50 }
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51
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52 in = fopen(fname, "rb");
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53 if (in == NULL) {
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54 err = CRYPT_FILE_NOTFOUND;
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55 goto LBL_ERR;
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56 }
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57
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58 do {
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59 x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
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60 if ((err = poly1305_process(&st, buf, (unsigned long)x)) != CRYPT_OK) {
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61 fclose(in);
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62 goto LBL_CLEANBUF;
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63 }
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64 } while (x == LTC_FILE_READ_BUFSIZE);
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65
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66 if (fclose(in) != 0) {
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67 err = CRYPT_ERROR;
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68 goto LBL_CLEANBUF;
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69 }
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70
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71 err = poly1305_done(&st, mac, maclen);
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72
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73 LBL_CLEANBUF:
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74 zeromem(buf, LTC_FILE_READ_BUFSIZE);
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75 LBL_ERR:
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76 #ifdef LTC_CLEAN_STACK
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77 zeromem(&st, sizeof(poly1305_state));
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78 #endif
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79 XFREE(buf);
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80 return err;
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81 #endif
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82 }
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83
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84 #endif
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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: $Format:%ai$ */