diff options
Diffstat (limited to 'crypto/rand')
| -rw-r--r-- | crypto/rand/build.info | 2 | ||||
| -rw-r--r-- | crypto/rand/drbg_ctr.c | 27 |
2 files changed, 14 insertions, 15 deletions
diff --git a/crypto/rand/build.info b/crypto/rand/build.info index df9bac67f04c..a4e7900bdbff 100644 --- a/crypto/rand/build.info +++ b/crypto/rand/build.info @@ -2,3 +2,5 @@ LIBS=../../libcrypto SOURCE[../../libcrypto]=\ randfile.c rand_lib.c rand_err.c rand_egd.c \ rand_win.c rand_unix.c rand_vms.c drbg_lib.c drbg_ctr.c + +INCLUDE[drbg_ctr.o]=../modes diff --git a/crypto/rand/drbg_ctr.c b/crypto/rand/drbg_ctr.c index 93b82f34ceda..0f0ad1b37be4 100644 --- a/crypto/rand/drbg_ctr.c +++ b/crypto/rand/drbg_ctr.c @@ -1,5 +1,5 @@ /* - * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -12,28 +12,25 @@ #include <openssl/crypto.h> #include <openssl/err.h> #include <openssl/rand.h> -#include "internal/thread_once.h" +#include "modes_local.h" #include "internal/thread_once.h" #include "rand_local.h" + /* * Implementation of NIST SP 800-90A CTR DRBG. */ static void inc_128(RAND_DRBG_CTR *ctr) { - int i; - unsigned char c; - unsigned char *p = &ctr->V[15]; - - for (i = 0; i < 16; i++, p--) { - c = *p; - c++; - *p = c; - if (c != 0) { - /* If we didn't wrap around, we're done. */ - break; - } - } + unsigned char *p = &ctr->V[0]; + u32 n = 16, c = 1; + + do { + --n; + c += p[n]; + p[n] = (u8)c; + c >>= 8; + } while (n); } static void ctr_XOR(RAND_DRBG_CTR *ctr, const unsigned char *in, size_t inlen) |