diff options
Diffstat (limited to 'crypto/modes/cbc128.c')
| -rw-r--r-- | crypto/modes/cbc128.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/crypto/modes/cbc128.c b/crypto/modes/cbc128.c index 3d3782cbe118..0e54f75470b2 100644 --- a/crypto/modes/cbc128.c +++ b/crypto/modes/cbc128.c @@ -117,7 +117,7 @@ void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out, unsigned char ivec[16], block128_f block) { size_t n; - union { size_t align; unsigned char c[16]; } tmp; + union { size_t t[16/sizeof(size_t)]; unsigned char c[16]; } tmp; assert(in && out && key && ivec); @@ -137,11 +137,13 @@ void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out, out += 16; } } - else { + else if (16%sizeof(size_t) == 0) { /* always true */ while (len>=16) { + size_t *out_t=(size_t *)out, *iv_t=(size_t *)iv; + (*block)(in, out, key); - for(n=0; n<16; n+=sizeof(size_t)) - *(size_t *)(out+n) ^= *(size_t *)(iv+n); + for(n=0; n<16/sizeof(size_t); n++) + out_t[n] ^= iv_t[n]; iv = in; len -= 16; in += 16; @@ -165,15 +167,16 @@ void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out, out += 16; } } - else { - size_t c; + else if (16%sizeof(size_t) == 0) { /* always true */ while (len>=16) { + size_t c, *out_t=(size_t *)out, *ivec_t=(size_t *)ivec; + const size_t *in_t=(const size_t *)in; + (*block)(in, tmp.c, key); - for(n=0; n<16; n+=sizeof(size_t)) { - c = *(size_t *)(in+n); - *(size_t *)(out+n) = - *(size_t *)(tmp.c+n) ^ *(size_t *)(ivec+n); - *(size_t *)(ivec+n) = c; + for(n=0; n<16/sizeof(size_t); n++) { + c = in_t[n]; + out_t[n] = tmp.t[n] ^ ivec_t[n]; + ivec_t[n] = c; } len -= 16; in += 16; |