diff options
Diffstat (limited to 'libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c')
| -rw-r--r-- | libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c | 212 |
1 files changed, 106 insertions, 106 deletions
diff --git a/libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c b/libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c index 7ec0c4e78e..e52a573d40 100644 --- a/libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c +++ b/libs/libsodium/src/crypto_stream/salsa208/ref/stream_salsa208_ref.c @@ -1,106 +1,106 @@ -/* -version 20140420 -D. J. Bernstein -Public domain. -*/ - -#include <stdint.h> - -#include "crypto_core_salsa208.h" -#include "crypto_stream_salsa208.h" -#include "utils.h" - -int -crypto_stream_salsa208(unsigned char *c, unsigned long long clen, - const unsigned char *n, const unsigned char *k) -{ - unsigned char in[16]; - unsigned char block[64]; - unsigned char kcopy[32]; - unsigned int i; - unsigned int u; - - if (!clen) { - return 0; - } - for (i = 0; i < 32; ++i) { - kcopy[i] = k[i]; - } - for (i = 0; i < 8; ++i) { - in[i] = n[i]; - } - for (i = 8; i < 16; ++i) { - in[i] = 0; - } - while (clen >= 64) { - crypto_core_salsa208(c, in, kcopy, NULL); - u = 1; - for (i = 8; i < 16; ++i) { - u += (unsigned int)in[i]; - in[i] = u; - u >>= 8; - } - clen -= 64; - c += 64; - } - if (clen) { - crypto_core_salsa208(block, in, kcopy, NULL); - for (i = 0; i < (unsigned int)clen; ++i) { - c[i] = block[i]; - } - } - sodium_memzero(block, sizeof block); - sodium_memzero(kcopy, sizeof kcopy); - - return 0; -} - -int -crypto_stream_salsa208_xor(unsigned char *c, const unsigned char *m, - unsigned long long mlen, const unsigned char *n, - const unsigned char *k) -{ - unsigned char in[16]; - unsigned char block[64]; - unsigned char kcopy[32]; - unsigned int i; - unsigned int u; - - if (!mlen) { - return 0; - } - for (i = 0; i < 32; ++i) { - kcopy[i] = k[i]; - } - for (i = 0; i < 8; ++i) { - in[i] = n[i]; - } - for (i = 8; i < 16; ++i) { - in[i] = 0; - } - while (mlen >= 64) { - crypto_core_salsa208(block, in, kcopy, NULL); - for (i = 0; i < 64; ++i) { - c[i] = m[i] ^ block[i]; - } - u = 1; - for (i = 8; i < 16; ++i) { - u += (unsigned int)in[i]; - in[i] = u; - u >>= 8; - } - mlen -= 64; - c += 64; - m += 64; - } - if (mlen) { - crypto_core_salsa208(block, in, kcopy, NULL); - for (i = 0; i < (unsigned int)mlen; ++i) { - c[i] = m[i] ^ block[i]; - } - } - sodium_memzero(block, sizeof block); - sodium_memzero(kcopy, sizeof kcopy); - - return 0; -} +/*
+version 20140420
+D. J. Bernstein
+Public domain.
+*/
+
+#include <stdint.h>
+
+#include "crypto_core_salsa208.h"
+#include "crypto_stream_salsa208.h"
+#include "utils.h"
+
+int
+crypto_stream_salsa208(unsigned char *c, unsigned long long clen,
+ const unsigned char *n, const unsigned char *k)
+{
+ unsigned char in[16];
+ unsigned char block[64];
+ unsigned char kcopy[32];
+ unsigned int i;
+ unsigned int u;
+
+ if (!clen) {
+ return 0;
+ }
+ for (i = 0; i < 32; ++i) {
+ kcopy[i] = k[i];
+ }
+ for (i = 0; i < 8; ++i) {
+ in[i] = n[i];
+ }
+ for (i = 8; i < 16; ++i) {
+ in[i] = 0;
+ }
+ while (clen >= 64) {
+ crypto_core_salsa208(c, in, kcopy, NULL);
+ u = 1;
+ for (i = 8; i < 16; ++i) {
+ u += (unsigned int)in[i];
+ in[i] = u;
+ u >>= 8;
+ }
+ clen -= 64;
+ c += 64;
+ }
+ if (clen) {
+ crypto_core_salsa208(block, in, kcopy, NULL);
+ for (i = 0; i < (unsigned int)clen; ++i) {
+ c[i] = block[i];
+ }
+ }
+ sodium_memzero(block, sizeof block);
+ sodium_memzero(kcopy, sizeof kcopy);
+
+ return 0;
+}
+
+int
+crypto_stream_salsa208_xor(unsigned char *c, const unsigned char *m,
+ unsigned long long mlen, const unsigned char *n,
+ const unsigned char *k)
+{
+ unsigned char in[16];
+ unsigned char block[64];
+ unsigned char kcopy[32];
+ unsigned int i;
+ unsigned int u;
+
+ if (!mlen) {
+ return 0;
+ }
+ for (i = 0; i < 32; ++i) {
+ kcopy[i] = k[i];
+ }
+ for (i = 0; i < 8; ++i) {
+ in[i] = n[i];
+ }
+ for (i = 8; i < 16; ++i) {
+ in[i] = 0;
+ }
+ while (mlen >= 64) {
+ crypto_core_salsa208(block, in, kcopy, NULL);
+ for (i = 0; i < 64; ++i) {
+ c[i] = m[i] ^ block[i];
+ }
+ u = 1;
+ for (i = 8; i < 16; ++i) {
+ u += (unsigned int)in[i];
+ in[i] = u;
+ u >>= 8;
+ }
+ mlen -= 64;
+ c += 64;
+ m += 64;
+ }
+ if (mlen) {
+ crypto_core_salsa208(block, in, kcopy, NULL);
+ for (i = 0; i < (unsigned int)mlen; ++i) {
+ c[i] = m[i] ^ block[i];
+ }
+ }
+ sodium_memzero(block, sizeof block);
+ sodium_memzero(kcopy, sizeof kcopy);
+
+ return 0;
+}
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