| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org |
| */ |
| #include "mycrypt.h" |
| |
| int register_prng(const struct _prng_descriptor *prng) |
| { |
| int x; |
| |
| _ARGCHK(prng != NULL); |
| |
| /* is it already registered? */ |
| for (x = 0; x < TAB_SIZE; x++) { |
| if (memcmp(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor)) == 0) { |
| return x; |
| } |
| } |
| |
| /* find a blank spot */ |
| for (x = 0; x < TAB_SIZE; x++) { |
| if (prng_descriptor[x].name == NULL) { |
| XMEMCPY(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor)); |
| return x; |
| } |
| } |
| |
| /* no spot */ |
| return -1; |
| } |