wolfCrypt CSharp Wrapper

[dgarske]

Description

• Adds RNG, ECC(ECIES and ECDHE), RSA, ED25519/Curve25519, AES-GCM, and Hashing to the CSharp wrapper.
• Adds GitHub action for building the CSharp wrapper solution and running wolfCrypt test and a TLS server/client example.
• Adds "new" API's for wolfCrypt for platforms that cannot tolerate the structs directly.
• Fixes for several scan-build warnings.

[wolfSSL-Bot]

Can one of the admins verify this patch?

[dgarske]

Retest this please

Failed "PRB-single-flag.txt_140" -> FAIL: scripts/openssl.test

Verification: OK
---
New, TLSv1.2, Cipher is DHE-RSA-AES128-SHA256
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : DHE-RSA-AES128-SHA256
    Session-ID: 603095B7951650878661715FD3F8986C9AA55554190CF76174CE4EF8A4621486
    Session-ID-ctx: 
    Master-Key: 10EEBC6975E0DF1DE3B1DDA67AC867EFCAE0C677AE8CD4C6F693E89FF39F038427CCE6F0C5EF2D52B992430B161FE6F9
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1723481638
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: yes
---
client failed! Suite = DHE-RSA-AES128-SHA256 version = 3
in cleanup
killing server: OpenSSL_RSA (51839)
killing server: wolfSSL_RSA (58911)
killing server: OpenSSL_ECDH[E]-ECDSA (64612)
killing server: wolfSSL_ECDH[E]-ECDSA (58911)
FAIL scripts/openssl.test (exit status: 1)

[dgarske]

@wolfSSL-Bot , this work is at a good checkpoint to review. More work is planned for the wolfCrypt CSharp wrapper, but the ECC, ED25519/Curve25519 and RSA should be ready/done.

[dgarske]

Retest this please. Multi-test failure, but history not retained long enough

[dgarske]

@aidangarske PR has merge conflicts and needs rebase / force-push.

[dgarske]

@aidangarske please review and fix these warnings. Also the memory leak in aes_test. Check when the new/free are called.

make[2]: warning: -j4 forced in submake: resetting jobserver mode.
wolfcrypt/test/test.c:33711:34: warning: 'XMEMSET' call operates on objects of type 'byte' (aka 'unsigned char') while the size is based on a different type 'byte *' (aka 'unsigned char *') [-Wsizeof-pointer-memaccess]
    XMEMSET(plaintext, 0, sizeof(plaintext));
            ~~~~~~~~~            ^~~~~~~~~
wolfcrypt/test/test.c:33711:34: note: did you mean to provide an explicit length?
    XMEMSET(plaintext, 0, sizeof(plaintext));
                                 ^~~~~~~~~
wolfcrypt/test/test.c:33711:34: warning: 'XMEMSET' call operates on objects of type 'byte' (aka 'unsigned char') while the size is based on a different type 'byte *' (aka 'unsigned char *') [-Wsizeof-pointer-memaccess]
    XMEMSET(plaintext, 0, sizeof(plaintext));
            ~~~~~~~~~            ^~~~~~~~~
wolfcrypt/test/test.c:33711:34: note: did you mean to provide an explicit length?
    XMEMSET(plaintext, 0, sizeof(plaintext));
                                 ^~~~~~~~~
1 warning generated.
1 warning generated.```

==87146==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 1024 byte(s) in 1 object(s) allocated from:
#0 0x55f8bcd2c47e in __interceptor_malloc (/tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/testsuite/.libs/testsuite.test+0x13547e) (BuildId: 13c35a83200b732a78737f27851e791d826dce10)
#1 0x55f8bcd85de1 in aes_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:13679:23
#2 0x55f8bcd6823a in wolfcrypt_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:1878:17
#3 0x7fdcfca29d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
Direct leak of 1024 byte(s) in 1 object(s) allocated from:
#0 0x55f8bcd2c47e in __interceptor_malloc (/tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/testsuite/.libs/testsuite.test+0x13547e) (BuildId: 13c35a83200b732a78737f27851e791d826dce10)
#1 0x55f8bcd85df6 in aes_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:13687:23
#2 0x55f8bcd6823a in wolfcrypt_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:1878:17
#3 0x7fdcfca29d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

==62623==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 848 byte(s) in 1 object(s) allocated from:
#0 0x55bf1024f79e in __interceptor_malloc (/tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/testsuite/.libs/testsuite.test+0xd379e) (BuildId: 1f797b810164a3f230806b46f6a1924cba65f62b)
#1 0x55bf1029cbfc in aes_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:13679:23
#2 0x55bf1028ad99 in wolfcrypt_test /tmp/workspace/PRB-fsanitize-addr-v3/wolfssl/wolfcrypt/test/test.c:1878:17
#3 0x7fa962229d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16