CryptoCore class to access to base crypto utils.

Godot core needs MD5/SHA256/AES/Base64 which used to be provided by
separate libraries.
Since we bundle mbedtls in most cases, and we can easily only include
the needed sources if we so desire, let's use it.

To simplify library changes in the future, and better isolate header
dependencies all functions have been wrapped around inside a class in
`core/math/crypto_base.h`.

If the mbedtls module is disabled, we only bundle the needed source
files independently of the `builtin_mbedtls` option.
If the module is enabled, the `builtin_mbedtls` option works as usual.

Also remove some unused headers from StreamPeerMbedTLS which were
causing build issues.

1 files changed, 0 insertions, 397 deletions

diff --git a/thirdparty/misc/aes256.cpp b/thirdparty/misc/aes256.cpp
deleted file mode 100644
index dc271928b4..0000000000
--- a/thirdparty/misc/aes256.cpp
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
-*   Byte-oriented AES-256 implementation.
-*   All lookup tables replaced with 'on the fly' calculations.
-*
-*   Copyright (c) 2007-2011 Ilya O. Levin, http://www.literatecode.com
-*   Other contributors: Hal Finney
-*
-*   Permission to use, copy, modify, and distribute this software for any
-*   purpose with or without fee is hereby granted, provided that the above
-*   copyright notice and this permission notice appear in all copies.
-*
-*   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-*   WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-*   MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-*   ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-*   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-*   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-*   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-#include "aes256.h"
-
-#define FD(x)  (((x) >> 1) ^ (((x) & 1) ? 0x8d : 0))
-
-#define BACK_TO_TABLES
-
-static uint8_t rj_xtime(uint8_t);
-static void aes_subBytes(uint8_t *);
-static void aes_subBytes_inv(uint8_t *);
-static void aes_addRoundKey(uint8_t *, uint8_t *);
-static void aes_addRoundKey_cpy(uint8_t *, uint8_t *, uint8_t *);
-static void aes_shiftRows(uint8_t *);
-static void aes_shiftRows_inv(uint8_t *);
-static void aes_mixColumns(uint8_t *);
-static void aes_mixColumns_inv(uint8_t *);
-static void aes_expandEncKey(uint8_t *, uint8_t *);
-static void aes_expandDecKey(uint8_t *, uint8_t *);
-#ifndef BACK_TO_TABLES
-static uint8_t gf_alog(uint8_t);
-static uint8_t gf_log(uint8_t);
-static uint8_t gf_mulinv(uint8_t);
-static uint8_t rj_sbox(uint8_t);
-static uint8_t rj_sbox_inv(uint8_t);
-#endif
-
-#ifdef BACK_TO_TABLES
-
-static const uint8_t sbox[256] = {
-    0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
-    0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
-    0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
-    0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
-    0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
-    0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
-    0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
-    0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
-    0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
-    0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
-    0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
-    0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
-    0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
-    0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
-    0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
-    0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
-    0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
-    0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
-    0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
-    0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
-    0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
-    0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
-    0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
-    0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
-    0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
-    0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
-    0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
-    0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
-    0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
-    0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
-    0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
-    0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
-};
-static const uint8_t sboxinv[256] = {
-    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
-    0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
-    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
-    0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
-    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
-    0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
-    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
-    0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
-    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
-    0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
-    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
-    0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
-    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
-    0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
-    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
-    0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
-    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
-    0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
-    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
-    0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
-    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
-    0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
-    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
-    0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
-    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
-    0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
-    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
-    0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
-    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
-    0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
-    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
-    0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
-};
-
-#define rj_sbox(x)     sbox[(x)]
-#define rj_sbox_inv(x) sboxinv[(x)]
-
-#else /* tableless subroutines */
-
-/* -------------------------------------------------------------------------- */
-static uint8_t gf_alog(uint8_t x) // calculate anti-logarithm gen 3
-{
-    uint8_t y = 1, i;
-
-    for (i = 0; i < x; i++) y ^= rj_xtime(y);
-
-    return y;
-} /* gf_alog */
-
-/* -------------------------------------------------------------------------- */
-static uint8_t gf_log(uint8_t x) // calculate logarithm gen 3
-{
-    uint8_t y, i = 0;
-
-    if (x)
-        for (i = 1, y = 1; i > 0; i++ )
-        {
-            y ^= rj_xtime(y);
-            if (y == x) break;
-        }
-
-    return i;
-} /* gf_log */
-
-
-/* -------------------------------------------------------------------------- */
-static uint8_t gf_mulinv(uint8_t x) // calculate multiplicative inverse
-{
-    return (x) ? gf_alog(255 - gf_log(x)) : 0;
-} /* gf_mulinv */
-
-/* -------------------------------------------------------------------------- */
-static uint8_t rj_sbox(uint8_t x)
-{
-    uint8_t y, sb;
-
-    sb = y = gf_mulinv(x);
-    y = (uint8_t)(y << 1) | (y >> 7), sb ^= y;
-    y = (uint8_t)(y << 1) | (y >> 7), sb ^= y;
-    y = (uint8_t)(y << 1) | (y >> 7), sb ^= y;
-    y = (uint8_t)(y << 1) | (y >> 7), sb ^= y;
-
-    return (sb ^ 0x63);
-} /* rj_sbox */
-
-/* -------------------------------------------------------------------------- */
-static uint8_t rj_sbox_inv(uint8_t x)
-{
-    uint8_t y, sb;
-
-    y = x ^ 0x63;
-    sb = y = (uint8_t)(y << 1) | (y >> 7);
-    y = (uint8_t)(y << 2) | (y >> 6);
-    sb ^= y;
-    y = (uint8_t)(y << 3) | (y >> 5);
-    sb ^= y;
-
-    return gf_mulinv(sb);
-} /* rj_sbox_inv */
-
-#endif
-
-/* -------------------------------------------------------------------------- */
-static uint8_t rj_xtime(uint8_t x)
-{
-    uint8_t y = (uint8_t)(x << 1);
-    return (x & 0x80) ? (y ^ 0x1b) : y;
-} /* rj_xtime */
-
-/* -------------------------------------------------------------------------- */
-static void aes_subBytes(uint8_t *buf)
-{
-    register uint8_t i = 16;
-
-    while (i--) buf[i] = rj_sbox(buf[i]);
-} /* aes_subBytes */
-
-/* -------------------------------------------------------------------------- */
-static void aes_subBytes_inv(uint8_t *buf)
-{
-    register uint8_t i = 16;
-
-    while (i--) buf[i] = rj_sbox_inv(buf[i]);
-} /* aes_subBytes_inv */
-
-/* -------------------------------------------------------------------------- */
-static void aes_addRoundKey(uint8_t *buf, uint8_t *key)
-{
-    register uint8_t i = 16;
-
-    while (i--) buf[i] ^= key[i];
-} /* aes_addRoundKey */
-
-/* -------------------------------------------------------------------------- */
-static void aes_addRoundKey_cpy(uint8_t *buf, uint8_t *key, uint8_t *cpk)
-{
-    register uint8_t i = 16;
-
-    while (i--)  buf[i] ^= (cpk[i] = key[i]), cpk[16 + i] = key[16 + i];
-} /* aes_addRoundKey_cpy */
-
-
-/* -------------------------------------------------------------------------- */
-static void aes_shiftRows(uint8_t *buf)
-{
-    register uint8_t i, j; /* to make it potentially parallelable :) */
-
-    i = buf[1], buf[1] = buf[5], buf[5] = buf[9], buf[9] = buf[13], buf[13] = i;
-    i = buf[10], buf[10] = buf[2], buf[2] = i;
-    j = buf[3], buf[3] = buf[15], buf[15] = buf[11], buf[11] = buf[7], buf[7] = j;
-    j = buf[14], buf[14] = buf[6], buf[6]  = j;
-
-} /* aes_shiftRows */
-
-/* -------------------------------------------------------------------------- */
-static void aes_shiftRows_inv(uint8_t *buf)
-{
-    register uint8_t i, j; /* same as above :) */
-
-    i = buf[1], buf[1] = buf[13], buf[13] = buf[9], buf[9] = buf[5], buf[5] = i;
-    i = buf[2], buf[2] = buf[10], buf[10] = i;
-    j = buf[3], buf[3] = buf[7], buf[7] = buf[11], buf[11] = buf[15], buf[15] = j;
-    j = buf[6], buf[6] = buf[14], buf[14] = j;
-
-} /* aes_shiftRows_inv */
-
-/* -------------------------------------------------------------------------- */
-static void aes_mixColumns(uint8_t *buf)
-{
-    register uint8_t i, a, b, c, d, e;
-
-    for (i = 0; i < 16; i += 4)
-    {
-        a = buf[i];
-        b = buf[i + 1];
-        c = buf[i + 2];
-        d = buf[i + 3];
-        e = a ^ b ^ c ^ d;
-        buf[i] ^= e ^ rj_xtime(a ^ b);
-        buf[i + 1] ^= e ^ rj_xtime(b ^ c);
-        buf[i + 2] ^= e ^ rj_xtime(c ^ d);
-        buf[i + 3] ^= e ^ rj_xtime(d ^ a);
-    }
-} /* aes_mixColumns */
-
-/* -------------------------------------------------------------------------- */
-void aes_mixColumns_inv(uint8_t *buf)
-{
-    register uint8_t i, a, b, c, d, e, x, y, z;
-
-    for (i = 0; i < 16; i += 4)
-    {
-        a = buf[i];
-        b = buf[i + 1];
-        c = buf[i + 2];
-        d = buf[i + 3];
-        e = a ^ b ^ c ^ d;
-        z = rj_xtime(e);
-        x = e ^ rj_xtime(rj_xtime(z ^ a ^ c));
-        y = e ^ rj_xtime(rj_xtime(z ^ b ^ d));
-        buf[i] ^= x ^ rj_xtime(a ^ b);
-        buf[i + 1] ^= y ^ rj_xtime(b ^ c);
-        buf[i + 2] ^= x ^ rj_xtime(c ^ d);
-        buf[i + 3] ^= y ^ rj_xtime(d ^ a);
-    }
-} /* aes_mixColumns_inv */
-
-/* -------------------------------------------------------------------------- */
-static void aes_expandEncKey(uint8_t *k, uint8_t *rc)
-{
-    register uint8_t i;
-
-    k[0] ^= rj_sbox(k[29]) ^ (*rc);
-    k[1] ^= rj_sbox(k[30]);
-    k[2] ^= rj_sbox(k[31]);
-    k[3] ^= rj_sbox(k[28]);
-    *rc = rj_xtime( *rc);
-
-    for(i = 4; i < 16; i += 4)  k[i] ^= k[i - 4],   k[i + 1] ^= k[i - 3],
-                                            k[i + 2] ^= k[i - 2], k[i + 3] ^= k[i - 1];
-    k[16] ^= rj_sbox(k[12]);
-    k[17] ^= rj_sbox(k[13]);
-    k[18] ^= rj_sbox(k[14]);
-    k[19] ^= rj_sbox(k[15]);
-
-    for(i = 20; i < 32; i += 4) k[i] ^= k[i - 4],   k[i + 1] ^= k[i - 3],
-                                            k[i + 2] ^= k[i - 2], k[i + 3] ^= k[i - 1];
-
-} /* aes_expandEncKey */
-
-/* -------------------------------------------------------------------------- */
-void aes_expandDecKey(uint8_t *k, uint8_t *rc)
-{
-    uint8_t i;
-
-    for(i = 28; i > 16; i -= 4) k[i + 0] ^= k[i - 4], k[i + 1] ^= k[i - 3],
-                                                k[i + 2] ^= k[i - 2], k[i + 3] ^= k[i - 1];
-
-    k[16] ^= rj_sbox(k[12]);
-    k[17] ^= rj_sbox(k[13]);
-    k[18] ^= rj_sbox(k[14]);
-    k[19] ^= rj_sbox(k[15]);
-
-    for(i = 12; i > 0; i -= 4)  k[i + 0] ^= k[i - 4], k[i + 1] ^= k[i - 3],
-                                                k[i + 2] ^= k[i - 2], k[i + 3] ^= k[i - 1];
-
-    *rc = FD(*rc);
-    k[0] ^= rj_sbox(k[29]) ^ (*rc);
-    k[1] ^= rj_sbox(k[30]);
-    k[2] ^= rj_sbox(k[31]);
-    k[3] ^= rj_sbox(k[28]);
-} /* aes_expandDecKey */
-
-
-/* -------------------------------------------------------------------------- */
-void aes256_init(aes256_context *ctx, uint8_t *k)
-{
-    uint8_t rcon = 1;
-    register uint8_t i;
-
-    for (i = 0; i < sizeof(ctx->key); i++) ctx->enckey[i] = ctx->deckey[i] = k[i];
-    for (i = 8; --i;) aes_expandEncKey(ctx->deckey, &rcon);
-} /* aes256_init */
-
-/* -------------------------------------------------------------------------- */
-void aes256_done(aes256_context *ctx)
-{
-    register uint8_t i;
-
-    for (i = 0; i < sizeof(ctx->key); i++)
-        ctx->key[i] = ctx->enckey[i] = ctx->deckey[i] = 0;
-} /* aes256_done */
-
-/* -------------------------------------------------------------------------- */
-void aes256_encrypt_ecb(aes256_context *ctx, uint8_t *buf)
-{
-    uint8_t i, rcon;
-
-    aes_addRoundKey_cpy(buf, ctx->enckey, ctx->key);
-    for(i = 1, rcon = 1; i < 14; ++i)
-    {
-        aes_subBytes(buf);
-        aes_shiftRows(buf);
-        aes_mixColumns(buf);
-        if( i & 1 ) aes_addRoundKey( buf, &ctx->key[16]);
-        else aes_expandEncKey(ctx->key, &rcon), aes_addRoundKey(buf, ctx->key);
-    }
-    aes_subBytes(buf);
-    aes_shiftRows(buf);
-    aes_expandEncKey(ctx->key, &rcon);
-    aes_addRoundKey(buf, ctx->key);
-} /* aes256_encrypt */
-
-/* -------------------------------------------------------------------------- */
-void aes256_decrypt_ecb(aes256_context *ctx, uint8_t *buf)
-{
-    uint8_t i, rcon;
-
-    aes_addRoundKey_cpy(buf, ctx->deckey, ctx->key);
-    aes_shiftRows_inv(buf);
-    aes_subBytes_inv(buf);
-
-    for (i = 14, rcon = 0x80; --i;)
-    {
-        if( ( i & 1 ) )
-        {
-            aes_expandDecKey(ctx->key, &rcon);
-            aes_addRoundKey(buf, &ctx->key[16]);
-        }
-        else aes_addRoundKey(buf, ctx->key);
-        aes_mixColumns_inv(buf);
-        aes_shiftRows_inv(buf);
-        aes_subBytes_inv(buf);
-    }
-    aes_addRoundKey( buf, ctx->key);
-} /* aes256_decrypt */