1 files changed, 124 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/compat/sodium/sodium_salsa.cpp b/comm/third_party/botan/src/lib/compat/sodium/sodium_salsa.cpp
new file mode 100644
index 0000000000..c1465a9bb5
--- /dev/null
+++ b/comm/third_party/botan/src/lib/compat/sodium/sodium_salsa.cpp
@@ -0,0 +1,124 @@
+/*
+* (C) 2019 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/sodium.h>
+#include <botan/salsa20.h>
+#include <botan/loadstor.h>
+
+namespace Botan {
+
+int Sodium::crypto_core_hsalsa20(uint8_t out[], const uint8_t in[],
+                                 const uint8_t key[], const uint8_t c[])
+   {
+   uint32_t in32[16] = { 0 };
+
+   static const uint32_t SIGMA[] =
+      { 0x61707865, 0x3320646e, 0x79622d32, 0x6b206574 };
+
+   if(c == nullptr)
+      {
+      in32[0] = SIGMA[0];
+      in32[5] = SIGMA[1];
+      in32[10] = SIGMA[2];
+      in32[15] = SIGMA[3];
+      }
+   else
+      {
+      in32[0] = load_le<uint32_t>(c, 0);
+      in32[5] = load_le<uint32_t>(c, 1);
+      in32[10] = load_le<uint32_t>(c, 2);
+      in32[15] = load_le<uint32_t>(c, 3);
+      }
+
+   in32[1] = load_le<uint32_t>(key, 0);
+   in32[2] = load_le<uint32_t>(key, 1);
+   in32[3] = load_le<uint32_t>(key, 2);
+   in32[4] = load_le<uint32_t>(key, 3);
+
+   in32[6] = load_le<uint32_t>(in, 0);
+   in32[7] = load_le<uint32_t>(in, 1);
+   in32[8] = load_le<uint32_t>(in, 2);
+   in32[9] = load_le<uint32_t>(in, 3);
+
+   in32[11] = load_le<uint32_t>(key, 4);
+   in32[12] = load_le<uint32_t>(key, 5);
+   in32[13] = load_le<uint32_t>(key, 6);
+   in32[14] = load_le<uint32_t>(key, 7);
+
+   uint32_t out32[8] = { 0 };
+   Salsa20::hsalsa20(out32, in32);
+
+   copy_out_le(out, 32, out32);
+   return 0;
+   }
+
+int Sodium::crypto_stream_salsa20(uint8_t out[], size_t out_len,
+                                  const uint8_t nonce[], const uint8_t key[])
+   {
+   Salsa20 salsa;
+   salsa.set_key(key, crypto_stream_salsa20_KEYBYTES);
+   salsa.set_iv(nonce, crypto_stream_salsa20_NONCEBYTES);
+   salsa.write_keystream(out, out_len);
+   return 0;
+   }
+
+int Sodium::crypto_stream_salsa20_xor(uint8_t out[], const uint8_t in[],
+                                      size_t in_len, const uint8_t nonce[],
+                                      const uint8_t key[])
+   {
+   return crypto_stream_salsa20_xor_ic(out, in, in_len, nonce, 0, key);
+   }
+
+int Sodium::crypto_stream_salsa20_xor_ic(uint8_t out[], const uint8_t in[],
+                                         size_t in_len,
+                                         const uint8_t nonce[], uint64_t ic,
+                                         const uint8_t key[])
+   {
+   if((ic >> 6) != 0) // otherwise multiply overflows
+      return -1;
+
+   Salsa20 salsa;
+   salsa.set_key(key, crypto_stream_salsa20_KEYBYTES);
+   salsa.set_iv(nonce, crypto_stream_salsa20_NONCEBYTES);
+   salsa.seek(ic * 64);
+   salsa.cipher(in, out, in_len);
+   return 0;
+   }
+
+int Sodium::crypto_stream_xsalsa20(uint8_t out[], size_t out_len,
+                                   const uint8_t nonce[], const uint8_t key[])
+   {
+   Salsa20 salsa;
+   salsa.set_key(key, crypto_stream_xsalsa20_KEYBYTES);
+   salsa.set_iv(nonce, crypto_stream_xsalsa20_NONCEBYTES);
+   salsa.write_keystream(out, out_len);
+   return 0;
+   }
+
+int Sodium::crypto_stream_xsalsa20_xor(uint8_t out[], const uint8_t in[],
+                                       size_t in_len, const uint8_t nonce[],
+                                       const uint8_t key[])
+   {
+   return crypto_stream_xsalsa20_xor_ic(out, in, in_len, nonce, 0, key);
+   }
+
+int Sodium::crypto_stream_xsalsa20_xor_ic(uint8_t out[], const uint8_t in[],
+                                          size_t in_len,
+                                          const uint8_t nonce[], uint64_t ic,
+                                          const uint8_t key[])
+   {
+   if((ic >> 6) != 0) // otherwise multiply overflows
+      return -1;
+
+   Salsa20 salsa;
+   salsa.set_key(key, crypto_stream_xsalsa20_KEYBYTES);
+   salsa.set_iv(nonce, crypto_stream_xsalsa20_NONCEBYTES);
+   salsa.seek(ic * 64);
+   salsa.cipher(in, out, in_len);
+   return 0;
+   }
+
+}