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Differential D32114 Diff 95648 sys/crypto/aesni/aesni_ccm.c

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sys/crypto/aesni/aesni_ccm.c

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{ {
static const int tag_length = 16; /* 128 bits */ static const int tag_length = 16; /* 128 bits */
int L; int L;
int counter = 1; /* S0 has 0, S1 has 1 */ int counter = 1; /* S0 has 0, S1 has 1 */
size_t copy_amt, total = 0; size_t copy_amt, total = 0;
uint8_t *byte_ptr; uint8_t *byte_ptr;
__m128i s0, rolling_mac, s_x, staging_block; __m128i s0, rolling_mac, s_x, staging_block;
if (nbytes == 0 && abytes == 0)
return;
/* NIST 800-38c section A.1 says n is [7, 13]. */ /* NIST 800-38c section A.1 says n is [7, 13]. */
if (nlen < 7 || nlen > 13) if (nlen < 7 || nlen > 13)
panic("%s: bad nonce length %d", __FUNCTION__, nlen); panic("%s: bad nonce length %d", __FUNCTION__, nlen);
/* /*
* We need to know how many bytes to use to describe * We need to know how many bytes to use to describe
* the length of the data. Normally, nlen should be * the length of the data. Normally, nlen should be
* 12, which leaves us 3 bytes to do that -- 16mbytes of * 12, which leaves us 3 bytes to do that -- 16mbytes of
▲ Show 20 Lines • Show All 153 Lines • ▼ Show 20 LinesAES_CCM_decrypt(const unsigned char *in, unsigned char *out,
const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int nlen, const unsigned char *tag, uint32_t nbytes, uint32_t abytes, int nlen,
const unsigned char *key, int nr) const unsigned char *key, int nr)
{ {
static const int tag_length = 16; /* 128 bits */ static const int tag_length = 16; /* 128 bits */
int L; int L;
__m128i s0, rolling_mac, staging_block; __m128i s0, rolling_mac, staging_block;
uint8_t *byte_ptr; uint8_t *byte_ptr;
if (nbytes == 0 && abytes == 0)
return (1); // No message means no decryption!
if (nlen < 0 || nlen > 15) if (nlen < 0 || nlen > 15)
panic("%s: bad nonce length %d", __FUNCTION__, nlen); panic("%s: bad nonce length %d", __FUNCTION__, nlen);
/* /*
* We need to know how many bytes to use to describe * We need to know how many bytes to use to describe
* the length of the data. Normally, nlen should be * the length of the data. Normally, nlen should be
* 12, which leaves us 3 bytes to do that -- 16mbytes of * 12, which leaves us 3 bytes to do that -- 16mbytes of
* data to encrypt. But it can be longer or shorter. * data to encrypt. But it can be longer or shorter.
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