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path: root/openssl/crypto/modes/cbc128.c
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Diffstat (limited to 'openssl/crypto/modes/cbc128.c')
-rw-r--r--openssl/crypto/modes/cbc128.c250
1 files changed, 126 insertions, 124 deletions
diff --git a/openssl/crypto/modes/cbc128.c b/openssl/crypto/modes/cbc128.c
index 0e54f7547..1ed796727 100644
--- a/openssl/crypto/modes/cbc128.c
+++ b/openssl/crypto/modes/cbc128.c
@@ -6,7 +6,7 @@
* 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
@@ -60,146 +60,148 @@
#include <assert.h>
#ifndef STRICT_ALIGNMENT
-# define STRICT_ALIGNMENT 0
+# define STRICT_ALIGNMENT 0
#endif
void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
- size_t len, const void *key,
- unsigned char ivec[16], block128_f block)
+ size_t len, const void *key,
+ unsigned char ivec[16], block128_f block)
{
- size_t n;
- const unsigned char *iv = ivec;
+ size_t n;
+ const unsigned char *iv = ivec;
- assert(in && out && key && ivec);
+ assert(in && out && key && ivec);
#if !defined(OPENSSL_SMALL_FOOTPRINT)
- if (STRICT_ALIGNMENT &&
- ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
- while (len>=16) {
- for(n=0; n<16; ++n)
- out[n] = in[n] ^ iv[n];
- (*block)(out, out, key);
- iv = out;
- len -= 16;
- in += 16;
- out += 16;
- }
- } else {
- while (len>=16) {
- for(n=0; n<16; n+=sizeof(size_t))
- *(size_t*)(out+n) =
- *(size_t*)(in+n) ^ *(size_t*)(iv+n);
- (*block)(out, out, key);
- iv = out;
- len -= 16;
- in += 16;
- out += 16;
- }
- }
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
+ while (len >= 16) {
+ for (n = 0; n < 16; ++n)
+ out[n] = in[n] ^ iv[n];
+ (*block) (out, out, key);
+ iv = out;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ } else {
+ while (len >= 16) {
+ for (n = 0; n < 16; n += sizeof(size_t))
+ *(size_t *)(out + n) =
+ *(size_t *)(in + n) ^ *(size_t *)(iv + n);
+ (*block) (out, out, key);
+ iv = out;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
#endif
- while (len) {
- for(n=0; n<16 && n<len; ++n)
- out[n] = in[n] ^ iv[n];
- for(; n<16; ++n)
- out[n] = iv[n];
- (*block)(out, out, key);
- iv = out;
- if (len<=16) break;
- len -= 16;
- in += 16;
- out += 16;
- }
- memcpy(ivec,iv,16);
+ while (len) {
+ for (n = 0; n < 16 && n < len; ++n)
+ out[n] = in[n] ^ iv[n];
+ for (; n < 16; ++n)
+ out[n] = iv[n];
+ (*block) (out, out, key);
+ iv = out;
+ if (len <= 16)
+ break;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ memcpy(ivec, iv, 16);
}
void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
- size_t len, const void *key,
- unsigned char ivec[16], block128_f block)
+ size_t len, const void *key,
+ unsigned char ivec[16], block128_f block)
{
- size_t n;
- union { size_t t[16/sizeof(size_t)]; unsigned char c[16]; } tmp;
+ size_t n;
+ union {
+ size_t t[16 / sizeof(size_t)];
+ unsigned char c[16];
+ } tmp;
- assert(in && out && key && ivec);
+ assert(in && out && key && ivec);
#if !defined(OPENSSL_SMALL_FOOTPRINT)
- if (in != out) {
- const unsigned char *iv = ivec;
+ if (in != out) {
+ const unsigned char *iv = ivec;
- if (STRICT_ALIGNMENT &&
- ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
- while (len>=16) {
- (*block)(in, out, key);
- for(n=0; n<16; ++n)
- out[n] ^= iv[n];
- iv = in;
- len -= 16;
- in += 16;
- out += 16;
- }
- }
- else if (16%sizeof(size_t) == 0) { /* always true */
- while (len>=16) {
- size_t *out_t=(size_t *)out, *iv_t=(size_t *)iv;
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
+ while (len >= 16) {
+ (*block) (in, out, key);
+ for (n = 0; n < 16; ++n)
+ out[n] ^= iv[n];
+ iv = in;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ } 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/sizeof(size_t); n++)
- out_t[n] ^= iv_t[n];
- iv = in;
- len -= 16;
- in += 16;
- out += 16;
- }
- }
- memcpy(ivec,iv,16);
- } else {
- if (STRICT_ALIGNMENT &&
- ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
- unsigned char c;
- while (len>=16) {
- (*block)(in, tmp.c, key);
- for(n=0; n<16; ++n) {
- c = in[n];
- out[n] = tmp.c[n] ^ ivec[n];
- ivec[n] = c;
- }
- len -= 16;
- in += 16;
- out += 16;
- }
- }
- 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, out, key);
+ for (n = 0; n < 16 / sizeof(size_t); n++)
+ out_t[n] ^= iv_t[n];
+ iv = in;
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ }
+ memcpy(ivec, iv, 16);
+ } else {
+ if (STRICT_ALIGNMENT &&
+ ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
+ unsigned char c;
+ while (len >= 16) {
+ (*block) (in, tmp.c, key);
+ for (n = 0; n < 16; ++n) {
+ c = in[n];
+ out[n] = tmp.c[n] ^ ivec[n];
+ ivec[n] = c;
+ }
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
+ } 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/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;
- out += 16;
- }
- }
- }
+ (*block) (in, tmp.c, key);
+ 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;
+ out += 16;
+ }
+ }
+ }
#endif
- while (len) {
- unsigned char c;
- (*block)(in, tmp.c, key);
- for(n=0; n<16 && n<len; ++n) {
- c = in[n];
- out[n] = tmp.c[n] ^ ivec[n];
- ivec[n] = c;
- }
- if (len<=16) {
- for (; n<16; ++n)
- ivec[n] = in[n];
- break;
- }
- len -= 16;
- in += 16;
- out += 16;
- }
+ while (len) {
+ unsigned char c;
+ (*block) (in, tmp.c, key);
+ for (n = 0; n < 16 && n < len; ++n) {
+ c = in[n];
+ out[n] = tmp.c[n] ^ ivec[n];
+ ivec[n] = c;
+ }
+ if (len <= 16) {
+ for (; n < 16; ++n)
+ ivec[n] = in[n];
+ break;
+ }
+ len -= 16;
+ in += 16;
+ out += 16;
+ }
}
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