diff options
author | Matt Caswell <matt@openssl.org> | 2015-01-22 03:40:55 +0000 |
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committer | Matt Caswell <matt@openssl.org> | 2015-01-22 09:20:09 +0000 |
commit | 0f113f3ee4d629ef9a4a30911b22b224772085e5 (patch) | |
tree | e014603da5aed1d0751f587a66d6e270b6bda3de /crypto/aes/aes_ige.c | |
parent | 22b52164aaed31d6e93dbd2d397ace041360e6aa (diff) | |
download | openssl-0f113f3ee4d629ef9a4a30911b22b224772085e5.tar.gz |
Run util/openssl-format-source -v -c .
Reviewed-by: Tim Hudson <tjh@openssl.org>
Diffstat (limited to 'crypto/aes/aes_ige.c')
-rw-r--r-- | crypto/aes/aes_ige.c | 454 |
1 files changed, 227 insertions, 227 deletions
diff --git a/crypto/aes/aes_ige.c b/crypto/aes/aes_ige.c index c161351e65..cf31c9bba4 100644 --- a/crypto/aes/aes_ige.c +++ b/crypto/aes/aes_ige.c @@ -7,7 +7,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in @@ -56,152 +56,147 @@ #define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long)) typedef struct { - unsigned long data[N_WORDS]; + unsigned long data[N_WORDS]; } aes_block_t; /* XXX: probably some better way to do this */ #if defined(__i386__) || defined(__x86_64__) -#define UNALIGNED_MEMOPS_ARE_FAST 1 +# define UNALIGNED_MEMOPS_ARE_FAST 1 #else -#define UNALIGNED_MEMOPS_ARE_FAST 0 +# define UNALIGNED_MEMOPS_ARE_FAST 0 #endif #if UNALIGNED_MEMOPS_ARE_FAST -#define load_block(d, s) (d) = *(const aes_block_t *)(s) -#define store_block(d, s) *(aes_block_t *)(d) = (s) +# define load_block(d, s) (d) = *(const aes_block_t *)(s) +# define store_block(d, s) *(aes_block_t *)(d) = (s) #else -#define load_block(d, s) memcpy((d).data, (s), AES_BLOCK_SIZE) -#define store_block(d, s) memcpy((d), (s).data, AES_BLOCK_SIZE) +# define load_block(d, s) memcpy((d).data, (s), AES_BLOCK_SIZE) +# define store_block(d, s) memcpy((d), (s).data, AES_BLOCK_SIZE) #endif /* N.B. The IV for this mode is _twice_ the block size */ void AES_ige_encrypt(const unsigned char *in, unsigned char *out, - size_t length, const AES_KEY *key, - unsigned char *ivec, const int enc) - { - size_t n; - size_t len = length; + size_t length, const AES_KEY *key, + unsigned char *ivec, const int enc) +{ + size_t n; + size_t len = length; - OPENSSL_assert(in && out && key && ivec); - OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc)); - OPENSSL_assert((length%AES_BLOCK_SIZE) == 0); + OPENSSL_assert(in && out && key && ivec); + OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc)); + OPENSSL_assert((length % AES_BLOCK_SIZE) == 0); - len = length / AES_BLOCK_SIZE; + len = length / AES_BLOCK_SIZE; - if (AES_ENCRYPT == enc) - { - if (in != out && - (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0)) - { - aes_block_t *ivp = (aes_block_t *)ivec; - aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE); + if (AES_ENCRYPT == enc) { + if (in != out && + (UNALIGNED_MEMOPS_ARE_FAST + || ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(long) == + 0)) { + aes_block_t *ivp = (aes_block_t *) ivec; + aes_block_t *iv2p = (aes_block_t *) (ivec + AES_BLOCK_SIZE); - while (len) - { - aes_block_t *inp = (aes_block_t *)in; - aes_block_t *outp = (aes_block_t *)out; + while (len) { + aes_block_t *inp = (aes_block_t *) in; + aes_block_t *outp = (aes_block_t *) out; - for(n=0 ; n < N_WORDS; ++n) - outp->data[n] = inp->data[n] ^ ivp->data[n]; - AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key); - for(n=0 ; n < N_WORDS; ++n) - outp->data[n] ^= iv2p->data[n]; - ivp = outp; - iv2p = inp; - --len; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - memcpy(ivec, ivp->data, AES_BLOCK_SIZE); - memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE); - } - else - { - aes_block_t tmp, tmp2; - aes_block_t iv; - aes_block_t iv2; + for (n = 0; n < N_WORDS; ++n) + outp->data[n] = inp->data[n] ^ ivp->data[n]; + AES_encrypt((unsigned char *)outp->data, + (unsigned char *)outp->data, key); + for (n = 0; n < N_WORDS; ++n) + outp->data[n] ^= iv2p->data[n]; + ivp = outp; + iv2p = inp; + --len; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + memcpy(ivec, ivp->data, AES_BLOCK_SIZE); + memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE); + } else { + aes_block_t tmp, tmp2; + aes_block_t iv; + aes_block_t iv2; - load_block(iv, ivec); - load_block(iv2, ivec + AES_BLOCK_SIZE); + load_block(iv, ivec); + load_block(iv2, ivec + AES_BLOCK_SIZE); - while (len) - { - load_block(tmp, in); - for(n=0 ; n < N_WORDS; ++n) - tmp2.data[n] = tmp.data[n] ^ iv.data[n]; - AES_encrypt((unsigned char *)tmp2.data, (unsigned char *)tmp2.data, key); - for(n=0 ; n < N_WORDS; ++n) - tmp2.data[n] ^= iv2.data[n]; - store_block(out, tmp2); - iv = tmp2; - iv2 = tmp; - --len; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - memcpy(ivec, iv.data, AES_BLOCK_SIZE); - memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE); - } - } - else - { - if (in != out && - (UNALIGNED_MEMOPS_ARE_FAST || ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(long)==0)) - { - aes_block_t *ivp = (aes_block_t *)ivec; - aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE); + while (len) { + load_block(tmp, in); + for (n = 0; n < N_WORDS; ++n) + tmp2.data[n] = tmp.data[n] ^ iv.data[n]; + AES_encrypt((unsigned char *)tmp2.data, + (unsigned char *)tmp2.data, key); + for (n = 0; n < N_WORDS; ++n) + tmp2.data[n] ^= iv2.data[n]; + store_block(out, tmp2); + iv = tmp2; + iv2 = tmp; + --len; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + memcpy(ivec, iv.data, AES_BLOCK_SIZE); + memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE); + } + } else { + if (in != out && + (UNALIGNED_MEMOPS_ARE_FAST + || ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(long) == + 0)) { + aes_block_t *ivp = (aes_block_t *) ivec; + aes_block_t *iv2p = (aes_block_t *) (ivec + AES_BLOCK_SIZE); - while (len) - { - aes_block_t tmp; - aes_block_t *inp = (aes_block_t *)in; - aes_block_t *outp = (aes_block_t *)out; + while (len) { + aes_block_t tmp; + aes_block_t *inp = (aes_block_t *) in; + aes_block_t *outp = (aes_block_t *) out; - for(n=0 ; n < N_WORDS; ++n) - tmp.data[n] = inp->data[n] ^ iv2p->data[n]; - AES_decrypt((unsigned char *)tmp.data, (unsigned char *)outp->data, key); - for(n=0 ; n < N_WORDS; ++n) - outp->data[n] ^= ivp->data[n]; - ivp = inp; - iv2p = outp; - --len; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - memcpy(ivec, ivp->data, AES_BLOCK_SIZE); - memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE); - } - else - { - aes_block_t tmp, tmp2; - aes_block_t iv; - aes_block_t iv2; + for (n = 0; n < N_WORDS; ++n) + tmp.data[n] = inp->data[n] ^ iv2p->data[n]; + AES_decrypt((unsigned char *)tmp.data, + (unsigned char *)outp->data, key); + for (n = 0; n < N_WORDS; ++n) + outp->data[n] ^= ivp->data[n]; + ivp = inp; + iv2p = outp; + --len; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + memcpy(ivec, ivp->data, AES_BLOCK_SIZE); + memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE); + } else { + aes_block_t tmp, tmp2; + aes_block_t iv; + aes_block_t iv2; - load_block(iv, ivec); - load_block(iv2, ivec + AES_BLOCK_SIZE); + load_block(iv, ivec); + load_block(iv2, ivec + AES_BLOCK_SIZE); - while (len) - { - load_block(tmp, in); - tmp2 = tmp; - for(n=0 ; n < N_WORDS; ++n) - tmp.data[n] ^= iv2.data[n]; - AES_decrypt((unsigned char *)tmp.data, (unsigned char *)tmp.data, key); - for(n=0 ; n < N_WORDS; ++n) - tmp.data[n] ^= iv.data[n]; - store_block(out, tmp); - iv = tmp2; - iv2 = tmp; - --len; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - memcpy(ivec, iv.data, AES_BLOCK_SIZE); - memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE); - } - } - } + while (len) { + load_block(tmp, in); + tmp2 = tmp; + for (n = 0; n < N_WORDS; ++n) + tmp.data[n] ^= iv2.data[n]; + AES_decrypt((unsigned char *)tmp.data, + (unsigned char *)tmp.data, key); + for (n = 0; n < N_WORDS; ++n) + tmp.data[n] ^= iv.data[n]; + store_block(out, tmp); + iv = tmp2; + iv2 = tmp; + --len; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + memcpy(ivec, iv.data, AES_BLOCK_SIZE); + memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE); + } + } +} /* * Note that its effectively impossible to do biIGE in anything other @@ -211,113 +206,118 @@ void AES_ige_encrypt(const unsigned char *in, unsigned char *out, /* N.B. The IV for this mode is _four times_ the block size */ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out, - size_t length, const AES_KEY *key, - const AES_KEY *key2, const unsigned char *ivec, - const int enc) - { - size_t n; - size_t len = length; - unsigned char tmp[AES_BLOCK_SIZE]; - unsigned char tmp2[AES_BLOCK_SIZE]; - unsigned char tmp3[AES_BLOCK_SIZE]; - unsigned char prev[AES_BLOCK_SIZE]; - const unsigned char *iv; - const unsigned char *iv2; + size_t length, const AES_KEY *key, + const AES_KEY *key2, const unsigned char *ivec, + const int enc) +{ + size_t n; + size_t len = length; + unsigned char tmp[AES_BLOCK_SIZE]; + unsigned char tmp2[AES_BLOCK_SIZE]; + unsigned char tmp3[AES_BLOCK_SIZE]; + unsigned char prev[AES_BLOCK_SIZE]; + const unsigned char *iv; + const unsigned char *iv2; - OPENSSL_assert(in && out && key && ivec); - OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc)); - OPENSSL_assert((length%AES_BLOCK_SIZE) == 0); + OPENSSL_assert(in && out && key && ivec); + OPENSSL_assert((AES_ENCRYPT == enc) || (AES_DECRYPT == enc)); + OPENSSL_assert((length % AES_BLOCK_SIZE) == 0); - if (AES_ENCRYPT == enc) - { - /* XXX: Do a separate case for when in != out (strictly should - check for overlap, too) */ + if (AES_ENCRYPT == enc) { + /* + * XXX: Do a separate case for when in != out (strictly should check + * for overlap, too) + */ - /* First the forward pass */ - iv = ivec; - iv2 = ivec + AES_BLOCK_SIZE; - while (len >= AES_BLOCK_SIZE) - { - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] = in[n] ^ iv[n]; - AES_encrypt(out, out, key); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] ^= iv2[n]; - iv = out; - memcpy(prev, in, AES_BLOCK_SIZE); - iv2 = prev; - len -= AES_BLOCK_SIZE; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } + /* First the forward pass */ + iv = ivec; + iv2 = ivec + AES_BLOCK_SIZE; + while (len >= AES_BLOCK_SIZE) { + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] = in[n] ^ iv[n]; + AES_encrypt(out, out, key); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] ^= iv2[n]; + iv = out; + memcpy(prev, in, AES_BLOCK_SIZE); + iv2 = prev; + len -= AES_BLOCK_SIZE; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } - /* And now backwards */ - iv = ivec + AES_BLOCK_SIZE*2; - iv2 = ivec + AES_BLOCK_SIZE*3; - len = length; - while(len >= AES_BLOCK_SIZE) - { - out -= AES_BLOCK_SIZE; - /* XXX: reduce copies by alternating between buffers */ - memcpy(tmp, out, AES_BLOCK_SIZE); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] ^= iv[n]; - /* hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); */ - AES_encrypt(out, out, key); - /* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */ - /* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */ - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] ^= iv2[n]; - /* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */ - iv = out; - memcpy(prev, tmp, AES_BLOCK_SIZE); - iv2 = prev; - len -= AES_BLOCK_SIZE; - } - } - else - { - /* First backwards */ - iv = ivec + AES_BLOCK_SIZE*2; - iv2 = ivec + AES_BLOCK_SIZE*3; - in += length; - out += length; - while (len >= AES_BLOCK_SIZE) - { - in -= AES_BLOCK_SIZE; - out -= AES_BLOCK_SIZE; - memcpy(tmp, in, AES_BLOCK_SIZE); - memcpy(tmp2, in, AES_BLOCK_SIZE); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - tmp[n] ^= iv2[n]; - AES_decrypt(tmp, out, key); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] ^= iv[n]; - memcpy(tmp3, tmp2, AES_BLOCK_SIZE); - iv = tmp3; - iv2 = out; - len -= AES_BLOCK_SIZE; - } + /* And now backwards */ + iv = ivec + AES_BLOCK_SIZE * 2; + iv2 = ivec + AES_BLOCK_SIZE * 3; + len = length; + while (len >= AES_BLOCK_SIZE) { + out -= AES_BLOCK_SIZE; + /* + * XXX: reduce copies by alternating between buffers + */ + memcpy(tmp, out, AES_BLOCK_SIZE); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] ^= iv[n]; + /* + * hexdump(stdout, "out ^ iv", out, AES_BLOCK_SIZE); + */ + AES_encrypt(out, out, key); + /* + * hexdump(stdout,"enc", out, AES_BLOCK_SIZE); + */ + /* + * hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); + */ + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] ^= iv2[n]; + /* + * hexdump(stdout,"out", out, AES_BLOCK_SIZE); + */ + iv = out; + memcpy(prev, tmp, AES_BLOCK_SIZE); + iv2 = prev; + len -= AES_BLOCK_SIZE; + } + } else { + /* First backwards */ + iv = ivec + AES_BLOCK_SIZE * 2; + iv2 = ivec + AES_BLOCK_SIZE * 3; + in += length; + out += length; + while (len >= AES_BLOCK_SIZE) { + in -= AES_BLOCK_SIZE; + out -= AES_BLOCK_SIZE; + memcpy(tmp, in, AES_BLOCK_SIZE); + memcpy(tmp2, in, AES_BLOCK_SIZE); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + tmp[n] ^= iv2[n]; + AES_decrypt(tmp, out, key); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] ^= iv[n]; + memcpy(tmp3, tmp2, AES_BLOCK_SIZE); + iv = tmp3; + iv2 = out; + len -= AES_BLOCK_SIZE; + } - /* And now forwards */ - iv = ivec; - iv2 = ivec + AES_BLOCK_SIZE; - len = length; - while (len >= AES_BLOCK_SIZE) - { - memcpy(tmp, out, AES_BLOCK_SIZE); - memcpy(tmp2, out, AES_BLOCK_SIZE); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - tmp[n] ^= iv2[n]; - AES_decrypt(tmp, out, key); - for(n=0 ; n < AES_BLOCK_SIZE ; ++n) - out[n] ^= iv[n]; - memcpy(tmp3, tmp2, AES_BLOCK_SIZE); - iv = tmp3; - iv2 = out; - len -= AES_BLOCK_SIZE; - in += AES_BLOCK_SIZE; - out += AES_BLOCK_SIZE; - } - } - } + /* And now forwards */ + iv = ivec; + iv2 = ivec + AES_BLOCK_SIZE; + len = length; + while (len >= AES_BLOCK_SIZE) { + memcpy(tmp, out, AES_BLOCK_SIZE); + memcpy(tmp2, out, AES_BLOCK_SIZE); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + tmp[n] ^= iv2[n]; + AES_decrypt(tmp, out, key); + for (n = 0; n < AES_BLOCK_SIZE; ++n) + out[n] ^= iv[n]; + memcpy(tmp3, tmp2, AES_BLOCK_SIZE); + iv = tmp3; + iv2 = out; + len -= AES_BLOCK_SIZE; + in += AES_BLOCK_SIZE; + out += AES_BLOCK_SIZE; + } + } +} |