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, 267 deletions

diff --git a/thirdparty/misc/md5.cpp b/thirdparty/misc/md5.cpp
deleted file mode 100644
index 1653ab0be5..0000000000
--- a/thirdparty/misc/md5.cpp
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- **********************************************************************
- ** md5.c                                                            **
- ** RSA Data Security, Inc. MD5 Message Digest Algorithm             **
- ** Created: 2/17/90 RLR                                             **
- ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version                  **
- **********************************************************************
- */
-
-/*
- **********************************************************************
- ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
- **                                                                  **
- ** License to copy and use this software is granted provided that   **
- ** it is identified as the "RSA Data Security, Inc. MD5 Message     **
- ** Digest Algorithm" in all material mentioning or referencing this **
- ** software or this function.                                       **
- **                                                                  **
- ** License is also granted to make and use derivative works         **
- ** provided that such works are identified as "derived from the RSA **
- ** Data Security, Inc. MD5 Message Digest Algorithm" in all         **
- ** material mentioning or referencing the derived work.             **
- **                                                                  **
- ** RSA Data Security, Inc. makes no representations concerning      **
- ** either the merchantability of this software or the suitability   **
- ** of this software for any particular purpose.  It is provided "as **
- ** is" without express or implied warranty of any kind.             **
- **                                                                  **
- ** These notices must be retained in any copies of any part of this **
- ** documentation and/or software.                                   **
- **********************************************************************
- */
-
-/* -- include the following line if the md5.h header file is separate -- */
-#include "md5.h"
-
-/* forward declaration */
-static void Transform (uint32_t *buf, uint32_t *in);
-
-
-static unsigned char PADDING[64] = {
-  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-/* F, G and H are basic MD5 functions: selection, majority, parity */
-#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
-#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
-#define H(x, y, z) ((x) ^ (y) ^ (z))
-#define I(x, y, z) ((y) ^ ((x) | (~z)))
-
-/* ROTATE_LEFT rotates x left n bits */
-#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
-
-/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
-/* Rotation is separate from addition to prevent recomputation */
-#define FF(a, b, c, d, x, s, ac) \
-  {(a) += F ((b), (c), (d)) + (x) + (uint32_t)(ac); \
-   (a) = ROTATE_LEFT ((a), (s)); \
-   (a) += (b); \
-  }
-#define GG(a, b, c, d, x, s, ac) \
-  {(a) += G ((b), (c), (d)) + (x) + (uint32_t)(ac); \
-   (a) = ROTATE_LEFT ((a), (s)); \
-   (a) += (b); \
-  }
-#define HH(a, b, c, d, x, s, ac) \
-  {(a) += H ((b), (c), (d)) + (x) + (uint32_t)(ac); \
-   (a) = ROTATE_LEFT ((a), (s)); \
-   (a) += (b); \
-  }
-#define II(a, b, c, d, x, s, ac) \
-  {(a) += I ((b), (c), (d)) + (x) + (uint32_t)(ac); \
-   (a) = ROTATE_LEFT ((a), (s)); \
-   (a) += (b); \
-  }
-
-void MD5Init (MD5_CTX *mdContext)
-{
-  mdContext->i[0] = mdContext->i[1] = (uint32_t)0;
-
-  /* Load magic initialization constants.
-   */
-  mdContext->buf[0] = (uint32_t)0x67452301;
-  mdContext->buf[1] = (uint32_t)0xefcdab89;
-  mdContext->buf[2] = (uint32_t)0x98badcfe;
-  mdContext->buf[3] = (uint32_t)0x10325476;
-}
-
-void MD5Update (MD5_CTX *mdContext,unsigned char *inBuf,unsigned int inLen) {
-  uint32_t in[16];
-  int mdi;
-  unsigned int i, ii;
-
-  /* compute number of bytes mod 64 */
-  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
-
-  /* update number of bits */
-  if ((mdContext->i[0] + ((uint32_t)inLen << 3)) < mdContext->i[0])
-    mdContext->i[1]++;
-  mdContext->i[0] += ((uint32_t)inLen << 3);
-  mdContext->i[1] += ((uint32_t)inLen >> 29);
-
-  while (inLen--) {
-    /* add new character to buffer, increment mdi */
-    mdContext->in[mdi++] = *inBuf++;
-
-    /* transform if necessary */
-    if (mdi == 0x40) {
-      for (i = 0, ii = 0; i < 16; i++, ii += 4)
-	in[i] = (((uint32_t)mdContext->in[ii+3]) << 24) |
-		(((uint32_t)mdContext->in[ii+2]) << 16) |
-		(((uint32_t)mdContext->in[ii+1]) << 8) |
-		((uint32_t)mdContext->in[ii]);
-      Transform (mdContext->buf, in);
-      mdi = 0;
-    }
-  }
-}
-
-void MD5Final (MD5_CTX *mdContext) {
-  uint32_t in[16];
-  int mdi;
-  unsigned int i, ii;
-  unsigned int padLen;
-
-  /* save number of bits */
-  in[14] = mdContext->i[0];
-  in[15] = mdContext->i[1];
-
-  /* compute number of bytes mod 64 */
-  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
-
-  /* pad out to 56 mod 64 */
-  padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
-  MD5Update (mdContext, PADDING, padLen);
-
-  /* append length in bits and transform */
-  for (i = 0, ii = 0; i < 14; i++, ii += 4)
-    in[i] = (((uint32_t)mdContext->in[ii+3]) << 24) |
-	    (((uint32_t)mdContext->in[ii+2]) << 16) |
-	    (((uint32_t)mdContext->in[ii+1]) << 8) |
-	    ((uint32_t)mdContext->in[ii]);
-  Transform (mdContext->buf, in);
-
-  /* store buffer in digest */
-  for (i = 0, ii = 0; i < 4; i++, ii += 4) {
-    mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
-    mdContext->digest[ii+1] =
-      (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
-    mdContext->digest[ii+2] =
-      (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
-    mdContext->digest[ii+3] =
-      (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
-  }
-}
-
-/* Basic MD5 step. Transform buf based on in.
- */
-static void Transform (uint32_t *buf, uint32_t *in) {
-  uint32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
-
-  /* Round 1 */
-#define S11 7
-#define S12 12
-#define S13 17
-#define S14 22
-  FF ( a, b, c, d, in[ 0], S11, 3614090360); /* 1 */
-  FF ( d, a, b, c, in[ 1], S12, 3905402710); /* 2 */
-  FF ( c, d, a, b, in[ 2], S13,  606105819); /* 3 */
-  FF ( b, c, d, a, in[ 3], S14, 3250441966); /* 4 */
-  FF ( a, b, c, d, in[ 4], S11, 4118548399); /* 5 */
-  FF ( d, a, b, c, in[ 5], S12, 1200080426); /* 6 */
-  FF ( c, d, a, b, in[ 6], S13, 2821735955); /* 7 */
-  FF ( b, c, d, a, in[ 7], S14, 4249261313); /* 8 */
-  FF ( a, b, c, d, in[ 8], S11, 1770035416); /* 9 */
-  FF ( d, a, b, c, in[ 9], S12, 2336552879); /* 10 */
-  FF ( c, d, a, b, in[10], S13, 4294925233); /* 11 */
-  FF ( b, c, d, a, in[11], S14, 2304563134); /* 12 */
-  FF ( a, b, c, d, in[12], S11, 1804603682); /* 13 */
-  FF ( d, a, b, c, in[13], S12, 4254626195); /* 14 */
-  FF ( c, d, a, b, in[14], S13, 2792965006); /* 15 */
-  FF ( b, c, d, a, in[15], S14, 1236535329); /* 16 */
-
-  /* Round 2 */
-#define S21 5
-#define S22 9
-#define S23 14
-#define S24 20
-  GG ( a, b, c, d, in[ 1], S21, 4129170786); /* 17 */
-  GG ( d, a, b, c, in[ 6], S22, 3225465664); /* 18 */
-  GG ( c, d, a, b, in[11], S23,  643717713); /* 19 */
-  GG ( b, c, d, a, in[ 0], S24, 3921069994); /* 20 */
-  GG ( a, b, c, d, in[ 5], S21, 3593408605); /* 21 */
-  GG ( d, a, b, c, in[10], S22,   38016083); /* 22 */
-  GG ( c, d, a, b, in[15], S23, 3634488961); /* 23 */
-  GG ( b, c, d, a, in[ 4], S24, 3889429448); /* 24 */
-  GG ( a, b, c, d, in[ 9], S21,  568446438); /* 25 */
-  GG ( d, a, b, c, in[14], S22, 3275163606); /* 26 */
-  GG ( c, d, a, b, in[ 3], S23, 4107603335); /* 27 */
-  GG ( b, c, d, a, in[ 8], S24, 1163531501); /* 28 */
-  GG ( a, b, c, d, in[13], S21, 2850285829); /* 29 */
-  GG ( d, a, b, c, in[ 2], S22, 4243563512); /* 30 */
-  GG ( c, d, a, b, in[ 7], S23, 1735328473); /* 31 */
-  GG ( b, c, d, a, in[12], S24, 2368359562); /* 32 */
-
-  /* Round 3 */
-#define S31 4
-#define S32 11
-#define S33 16
-#define S34 23
-  HH ( a, b, c, d, in[ 5], S31, 4294588738); /* 33 */
-  HH ( d, a, b, c, in[ 8], S32, 2272392833); /* 34 */
-  HH ( c, d, a, b, in[11], S33, 1839030562); /* 35 */
-  HH ( b, c, d, a, in[14], S34, 4259657740); /* 36 */
-  HH ( a, b, c, d, in[ 1], S31, 2763975236); /* 37 */
-  HH ( d, a, b, c, in[ 4], S32, 1272893353); /* 38 */
-  HH ( c, d, a, b, in[ 7], S33, 4139469664); /* 39 */
-  HH ( b, c, d, a, in[10], S34, 3200236656); /* 40 */
-  HH ( a, b, c, d, in[13], S31,  681279174); /* 41 */
-  HH ( d, a, b, c, in[ 0], S32, 3936430074); /* 42 */
-  HH ( c, d, a, b, in[ 3], S33, 3572445317); /* 43 */
-  HH ( b, c, d, a, in[ 6], S34,   76029189); /* 44 */
-  HH ( a, b, c, d, in[ 9], S31, 3654602809); /* 45 */
-  HH ( d, a, b, c, in[12], S32, 3873151461); /* 46 */
-  HH ( c, d, a, b, in[15], S33,  530742520); /* 47 */
-  HH ( b, c, d, a, in[ 2], S34, 3299628645); /* 48 */
-
-  /* Round 4 */
-#define S41 6
-#define S42 10
-#define S43 15
-#define S44 21
-  II ( a, b, c, d, in[ 0], S41, 4096336452); /* 49 */
-  II ( d, a, b, c, in[ 7], S42, 1126891415); /* 50 */
-  II ( c, d, a, b, in[14], S43, 2878612391); /* 51 */
-  II ( b, c, d, a, in[ 5], S44, 4237533241); /* 52 */
-  II ( a, b, c, d, in[12], S41, 1700485571); /* 53 */
-  II ( d, a, b, c, in[ 3], S42, 2399980690); /* 54 */
-  II ( c, d, a, b, in[10], S43, 4293915773); /* 55 */
-  II ( b, c, d, a, in[ 1], S44, 2240044497); /* 56 */
-  II ( a, b, c, d, in[ 8], S41, 1873313359); /* 57 */
-  II ( d, a, b, c, in[15], S42, 4264355552); /* 58 */
-  II ( c, d, a, b, in[ 6], S43, 2734768916); /* 59 */
-  II ( b, c, d, a, in[13], S44, 1309151649); /* 60 */
-  II ( a, b, c, d, in[ 4], S41, 4149444226); /* 61 */
-  II ( d, a, b, c, in[11], S42, 3174756917); /* 62 */
-  II ( c, d, a, b, in[ 2], S43,  718787259); /* 63 */
-  II ( b, c, d, a, in[ 9], S44, 3951481745); /* 64 */
-
-  buf[0] += a;
-  buf[1] += b;
-  buf[2] += c;
-  buf[3] += d;
-}
-
-/*
- **********************************************************************
- ** End of md5.c                                                     **
- ******************************* (cut) ********************************
- */