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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 * Tom St Denis, [email protected], http://libtomcrypt.org |
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10 */ |
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11 #include "mycrypt.h" |
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12 |
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13 int register_prng(const struct _prng_descriptor *prng) |
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14 { |
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15 int x; |
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16 |
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17 _ARGCHK(prng != NULL); |
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18 |
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19 /* is it already registered? */ |
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20 for (x = 0; x < TAB_SIZE; x++) { |
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21 if (memcmp(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor)) == 0) { |
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22 return x; |
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23 } |
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24 } |
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25 |
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26 /* find a blank spot */ |
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27 for (x = 0; x < TAB_SIZE; x++) { |
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28 if (prng_descriptor[x].name == NULL) { |
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29 memcpy(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor)); |
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30 return x; |
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31 } |
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32 } |
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33 |
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34 /* no spot */ |
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35 return -1; |
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36 } |
