From 2e59f9740a29439df7c7a56cf0ae83dec3081d31 Mon Sep 17 00:00:00 2001 From: Micah Anderson Date: Mon, 11 Aug 2014 13:49:21 -0400 Subject: initial import of debian version from mentors --- src/libsodium/crypto_stream/salsa20/ref/api.h | 5 ++ .../crypto_stream/salsa20/ref/stream_salsa20_ref.c | 61 +++++++++++++++++++ .../crypto_stream/salsa20/ref/xor_salsa20_ref.c | 69 ++++++++++++++++++++++ 3 files changed, 135 insertions(+) create mode 100644 src/libsodium/crypto_stream/salsa20/ref/api.h create mode 100644 src/libsodium/crypto_stream/salsa20/ref/stream_salsa20_ref.c create mode 100644 src/libsodium/crypto_stream/salsa20/ref/xor_salsa20_ref.c (limited to 'src/libsodium/crypto_stream/salsa20/ref') diff --git a/src/libsodium/crypto_stream/salsa20/ref/api.h b/src/libsodium/crypto_stream/salsa20/ref/api.h new file mode 100644 index 0000000..3616ea7 --- /dev/null +++ b/src/libsodium/crypto_stream/salsa20/ref/api.h @@ -0,0 +1,5 @@ + +#include "crypto_stream_salsa20.h" + +#define crypto_stream crypto_stream_salsa20 +#define crypto_stream_xor crypto_stream_salsa20_xor diff --git a/src/libsodium/crypto_stream/salsa20/ref/stream_salsa20_ref.c b/src/libsodium/crypto_stream/salsa20/ref/stream_salsa20_ref.c new file mode 100644 index 0000000..6d3eacb --- /dev/null +++ b/src/libsodium/crypto_stream/salsa20/ref/stream_salsa20_ref.c @@ -0,0 +1,61 @@ +/* +version 20140420 +D. J. Bernstein +Public domain. +*/ + +#include "api.h" +#include "crypto_core_salsa20.h" +#include "utils.h" + +#ifndef HAVE_AMD64_ASM + +typedef unsigned int uint32; + +static const unsigned char sigma[16] = { + 'e', 'x', 'p', 'a', 'n', 'd', ' ', '3', '2', '-', 'b', 'y', 't', 'e', ' ', 'k' +}; + +int crypto_stream( + 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 long long 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_salsa20(c,in,kcopy,sigma); + + 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_salsa20(block,in,kcopy,sigma); + for (i = 0;i < clen;++i) c[i] = block[i]; + } + sodium_memzero(block, sizeof block); + sodium_memzero(kcopy, sizeof kcopy); + + return 0; +} + +#endif diff --git a/src/libsodium/crypto_stream/salsa20/ref/xor_salsa20_ref.c b/src/libsodium/crypto_stream/salsa20/ref/xor_salsa20_ref.c new file mode 100644 index 0000000..19cd79e --- /dev/null +++ b/src/libsodium/crypto_stream/salsa20/ref/xor_salsa20_ref.c @@ -0,0 +1,69 @@ +/* +version 20140420 +D. J. Bernstein +Public domain. +*/ + +#include + +#include "api.h" +#include "crypto_core_salsa20.h" +#include "utils.h" + +#ifndef HAVE_AMD64_ASM + +typedef unsigned int uint32; + +static const unsigned char sigma[16] = { + 'e', 'x', 'p', 'a', 'n', 'd', ' ', '3', '2', '-', 'b', 'y', 't', 'e', ' ', 'k' +}; + +int crypto_stream_salsa20_xor_ic( + unsigned char *c, + const unsigned char *m,unsigned long long mlen, + const unsigned char *n, uint64_t ic, + const unsigned char *k +) +{ + unsigned char in[16]; + unsigned char block[64]; + unsigned char kcopy[32]; + unsigned long long 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] = (unsigned char) (ic & 0xff); + ic >>= 8; + } + + while (mlen >= 64) { + crypto_core_salsa20(block,in,kcopy,sigma); + 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_salsa20(block,in,kcopy,sigma); + for (i = 0;i < mlen;++i) c[i] = m[i] ^ block[i]; + } + sodium_memzero(block, sizeof block); + sodium_memzero(kcopy, sizeof kcopy); + + return 0; +} + +#endif -- cgit v1.2.3