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key.c - dedup - deduplicating backup program |
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git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/ (git://bitreich.org) |
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--- |
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key.c (970B) |
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--- |
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1 #include <assert.h> |
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2 #include <unistd.h> |
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3 |
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4 #include <sodium.h> |
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5 |
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6 #include "config.h" |
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7 #include "misc.h" |
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8 |
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9 int |
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10 keygen(unsigned char *key, size_t n) |
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11 { |
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12 assert(KEYSIZE == crypto_aead_xchacha20poly1305_ietf_KEYBYTES); |
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13 if (n != KEYSIZE) { |
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14 seterr("invalid key size"); |
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15 return -1; |
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16 } |
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17 if (sodium_init() < 0) { |
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18 seterr("sodium_init: failed"); |
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19 return -1; |
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20 } |
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21 crypto_aead_xchacha20poly1305_ietf_keygen(key); |
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22 return 0; |
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23 } |
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24 |
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25 int |
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26 writekey(int fd, unsigned char *key, size_t n) |
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27 { |
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28 assert(KEYSIZE == crypto_aead_xchacha20poly1305_ietf_KEYBYTES); |
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29 if (n != KEYSIZE) { |
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30 seterr("invalid key size"); |
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31 return -1; |
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32 } |
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33 if (xwrite(fd, key, n) != n) { |
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34 seterr("failed to write key"); |
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35 return -1; |
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36 } |
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37 return 0; |
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38 } |
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39 |
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40 int |
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41 readkey(int fd, unsigned char *key, size_t n) |
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42 { |
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43 assert(KEYSIZE == crypto_aead_xchacha20poly1305_ietf_KEYBYTES); |
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44 if (n != KEYSIZE) { |
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45 seterr("invalid key size"); |
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46 return -1; |
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47 } |
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48 if (xread(fd, key, n) != n) { |
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49 seterr("failed to read key"); |
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50 return -1; |
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51 } |
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52 return 0; |
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53 } |
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