all repos — min @ 63d8276b1479ce9ee680674f716c08d4fc49e13e

A small but practical concatenative programming language.

minpkg/lib/min_crypto.nim

 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 
import
  std/[base64,
  strutils,
  macros, # Needed only for getProjectPath
  times]
import
  ../vendor/aes/aes
import
  ../core/parser,
  ../core/value,
  ../core/interpreter,
  ../core/utils

{.compile: "../vendor/aes/libaes.c".}

when defined(ssl):
  import
    openssl

  proc MD4(d: cstring, n: culong, md: cstring = nil): cstring {.cdecl, importc.}
  proc EVP_MD_CTX_new*(): EVP_MD_CTX {.cdecl, importc: "EVP_MD_CTX_new".}
  proc EVP_MD_CTX_free*(ctx: EVP_MD_CTX) {.cdecl, importc: "EVP_MD_CTX_free".}
else:
  import
    checksums/sha1,
    checksums/md5

proc crypto_module*(i: In) =
  let def = i.define()


  def.symbol("encode") do (i: In):
    let vals = i.expect("'sym")
    let s = vals[0]
    i.push s.getString.encode.newVal

  def.symbol("decode") do (i: In):
    let vals = i.expect("'sym")
    let s = vals[0]
    i.push s.getString.decode.newVal

  when defined(ssl):

    when defined(windows) and defined(amd64):
      {.passL: "-static -L"&getProjectPath()&"/minpkg/vendor/openssl/windows -lssl -lcrypto -lgdi32 -ladvapi32 -luser32 -lws2_32 -lcrypt32".}
    elif defined(linux) and defined(amd64):
      {.passL: "-static -L"&getProjectPath()&"/minpkg/vendor/openssl/linux -lssl -lcrypto".}
    elif defined(macosx) and defined(amd64):
      {.passL: "-Bstatic -L"&getProjectPath()&"/minpkg/vendor/openssl/macosx -lssl -lcrypto -Bdynamic".}

    proc hash(s: string, kind: EVP_MD, size: int): string =
      var hash = alloc[ptr cuint](size)
      let ctx = EVP_MD_CTX_new()
      discard EVP_DigestInit_ex(ctx, kind, nil)
      discard EVP_DigestUpdate(ctx, s.cstring, s.len.cuint)
      discard EVP_DigestFinal_ex(ctx, hash, nil)
      EVP_MD_CTX_free(ctx)
      var hashStr = newString(size)
      copyMem(addr(hashStr[0]), hash, size)
      dealloc(hash)
      return hashStr.toHex.toLowerAscii[0..size-1]

    def.symbol("md5") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push hash(s, EVP_md5(), 32).newVal

    def.symbol("md4") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      var result = ""
      var str = MD4(s.cstring, s.len.culong)
      for i in 0 ..< 16:
        result.add str[i].BiggestInt.toHex(2).toLower
      i.push result.newVal

    def.symbol("sha1") do (i: In):
      let vals = i.expect("'sym")
      var s = vals[0].getString
      i.push hash(s, EVP_sha1(), 40).newVal

    def.symbol("sha224") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push hash(s, EVP_sha224(), 56).newVal

    def.symbol("sha256") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push hash(s, EVP_sha256(), 64).newVal

    def.symbol("sha384") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push hash(s, EVP_sha384(), 96).newVal

    def.symbol("sha512") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push hash(s, EVP_sha512(), 128).newVal

    def.symbol("aes") do (i: In):
      let vals = i.expect("'sym", "'sym")
      let k = vals[0]
      let s = vals[1]
      var text = s.getString
      var key = hash(k.getString, EVP_sha1(), 40)
      var iv = hash((key & $getTime().toUnix), EVP_sha1(), 40)
      var ctx = cast[ptr AES_ctx](alloc0(sizeof(AES_ctx)))
      AES_init_ctx_iv(ctx, cast[ptr uint8](key[0].addr), cast[ptr uint8](iv[
          0].addr));
      var input = cast[ptr uint8](text[0].addr)
      AES_CTR_xcrypt_buffer(ctx, input, text.len.uint32);
      i.push text.newVal

  else:

    def.symbol("md5") do (i: In):
      let vals = i.expect("'sym")
      let s = vals[0].getString
      i.push newVal($toMD5(s))

    def.symbol("sha1") do (i: In):
      let vals = i.expect("'sym")
      var s = vals[0].getString
      i.push newVal(toLowerAscii($secureHash(s)))

    def.symbol("aes") do (i: In):
      let vals = i.expect("'sym", "'sym")
      let k = vals[0]
      let s = vals[1]
      var text = s.getString
      var key = ($secureHash(k.getString)).toLowerAscii
      var iv = ($secureHash((key & $getTime().toUnix))).toLowerAscii
      var ctx = cast[ptr AES_ctx](alloc0(sizeof(AES_ctx)))
      AES_init_ctx_iv(ctx, cast[ptr uint8](key[0].addr), cast[ptr uint8](iv[
          0].addr));
      var input = cast[ptr uint8](text[0].addr)
      AES_CTR_xcrypt_buffer(ctx, input, text.len.uint32);
      i.push text.newVal

  def.finalize("crypto")