diff options
Diffstat (limited to 'src/crypto/modes/ctr.c')
| -rw-r--r-- | src/crypto/modes/ctr.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/crypto/modes/ctr.c b/src/crypto/modes/ctr.c index 61832ba..306b6f7 100644 --- a/src/crypto/modes/ctr.c +++ b/src/crypto/modes/ctr.c @@ -121,8 +121,9 @@ void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len, while (len >= 16) { (*block)(ivec, ecount_buf, key); ctr128_inc(ivec); - for (; n < 16; n += sizeof(size_t)) + for (; n < 16; n += sizeof(size_t)) { *(size_t *)(out + n) = *(size_t *)(in + n) ^ *(size_t *)(ecount_buf + n); + } len -= 16; out += 16; in += 16; @@ -162,7 +163,8 @@ void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, unsigned int *num, ctr128_f func) { unsigned int n, ctr32; - assert(in && out && key && ecount_buf && num); + assert(key && ecount_buf && num); + assert(len == 0 || (in && out)); assert(*num < 16); n = *num; @@ -179,8 +181,9 @@ void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, /* 1<<28 is just a not-so-small yet not-so-large number... * Below condition is practically never met, but it has to * be checked for code correctness. */ - if (sizeof(size_t) > sizeof(unsigned int) && blocks > (1U << 28)) + if (sizeof(size_t) > sizeof(unsigned int) && blocks > (1U << 28)) { blocks = (1U << 28); + } /* As (*func) operates on 32-bit counter, caller * has to handle overflow. 'if' below detects the * overflow, which is then handled by limiting the @@ -194,8 +197,9 @@ void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, /* (*func) does not update ivec, caller does: */ PUTU32(ivec + 12, ctr32); /* ... overflow was detected, propogate carry. */ - if (ctr32 == 0) + if (ctr32 == 0) { ctr96_inc(ivec); + } blocks *= 16; len -= blocks; out += blocks; |