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Lines 1-6
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/* OPENBSD ORIGINAL: lib/libc/crypto/arc4random.c */ |
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/* OPENBSD ORIGINAL: lib/libc/crypto/arc4random.c */ |
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/* $OpenBSD: arc4random.c,v 1.25 2013/10/01 18:34:57 markus Exp $ */ |
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/* $OpenBSD: arc4random.c,v 1.57 2022/07/31 05:10:36 djm Exp $ */ |
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/* |
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/* |
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* Copyright (c) 1996, David Mazieres <dm@uun.org> |
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* Copyright (c) 1996, David Mazieres <dm@uun.org> |
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Lines 65-70
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#define IVSZ 8 |
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#define IVSZ 8 |
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#define BLOCKSZ 64 |
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#define BLOCKSZ 64 |
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#define RSBUFSZ (16*BLOCKSZ) |
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#define RSBUFSZ (16*BLOCKSZ) |
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#define REKEY_BASE (1024*1024) /* NB. should be a power of 2 */ |
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static int rs_initialized; |
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static int rs_initialized; |
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static pid_t rs_stir_pid; |
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static pid_t rs_stir_pid; |
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static chacha_ctx rs; /* chacha context for random keystream */ |
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static chacha_ctx rs; /* chacha context for random keystream */ |
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Lines 125-130
static void
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_rs_stir(void) |
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_rs_stir(void) |
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{ |
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{ |
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u_char rnd[KEYSZ + IVSZ]; |
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u_char rnd[KEYSZ + IVSZ]; |
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uint32_t rekey_fuzz = 0; |
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#ifdef WITH_OPENSSL |
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#ifdef WITH_OPENSSL |
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if (RAND_bytes(rnd, sizeof(rnd)) <= 0) |
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if (RAND_bytes(rnd, sizeof(rnd)) <= 0) |
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Lines 145-151
_rs_stir(void)
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rs_have = 0; |
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rs_have = 0; |
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memset(rs_buf, 0, RSBUFSZ); |
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memset(rs_buf, 0, RSBUFSZ); |
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rs_count = 1600000; |
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/* rekey interval should not be predictable */ |
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chacha_encrypt_bytes(&rs, (uint8_t *)&rekey_fuzz, |
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(uint8_t *)&rekey_fuzz, sizeof(rekey_fuzz)); |
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rs_count = REKEY_BASE + (rekey_fuzz % REKEY_BASE); |
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} |
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} |
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static inline void |
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static inline void |
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