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This commit is contained in:
Bodo Möller 2000-01-21 20:18:09 +00:00
parent 720b3598d6
commit 2c8aeddc5d
1 changed files with 7 additions and 6 deletions
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13
crypto/rand/md_rand.c
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@ -322,19 +322,20 @@ static int ssleay_rand_bytes(unsigned char *buf, int num)
#endif #endif
/* /*
* (Based on doc/ssleay.txt, section rand.doc:) * (Based on the rand(3) manpage:)
* *
* For each group of 8 bytes (or less), we do the following, * For each group of 8 bytes (or less), we do the following:
* *
* Input into MD5, the top 8 bytes from 'md', the byte that are * Input into the hash function the top 8 bytes from 'md', the bytes
* to be overwritten by the random bytes and bytes from the * that are to be overwritten by the random bytes, and bytes from the
* 'state' (incrementing looping index). From this digest output * 'state' (incrementing looping index). From this digest output
* (which is kept in 'md'), the top (upto) 8 bytes are * (which is kept in 'md'), the top (upto) 8 bytes are
* returned to the caller and the bottom (upto) 8 bytes are xored * returned to the caller and the bottom (upto) 8 bytes are xored
* into the 'state'. * into the 'state'.
* Finally, after we have finished 'num' random bytes for the * Finally, after we have finished 'num' random bytes for the
* caller, 'count' (which is incremented) and the local and globl 'md' * caller, 'count' (which is incremented) and the local and global 'md'
* are fed into MD5 and the results are kept in the global 'md'. * are fed into the hash function and the results are kept in the
* global 'md'.
*/ */
CRYPTO_w_lock(CRYPTO_LOCK_RAND); CRYPTO_w_lock(CRYPTO_LOCK_RAND);