Chilkat Examples

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Xojo Plugin Web API Examples

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(Xojo Plugin) Signing HTTP Messages

Demonstrates how to sign HTTP messages per draft-cavage-http-signatures-10

For more information, see https://tools.ietf.org/html/draft-cavage-http-signatures-10

Chilkat Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Dim success As Boolean

Dim bCrlf As Boolean
bCrlf = True
Dim sbPublicKeyPem As New Chilkat.StringBuilder
success = sbPublicKeyPem.AppendLine("-----BEGIN PUBLIC KEY-----",bCrlf)
success = sbPublicKeyPem.AppendLine("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCFENGw33yGihy92pDjZQhl0C3",bCrlf)
success = sbPublicKeyPem.AppendLine("6rPJj+CvfSC8+q28hxA161QFNUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6",bCrlf)
success = sbPublicKeyPem.AppendLine("Z4UMR7EOcpfdUE9Hf3m/hs+FUR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJw",bCrlf)
success = sbPublicKeyPem.AppendLine("oYi+1hqp1fIekaxsyQIDAQAB",bCrlf)
success = sbPublicKeyPem.AppendLine("-----END PUBLIC KEY-----",bCrlf)

Dim pubKey As New Chilkat.PublicKey
success = pubKey.LoadFromString(sbPublicKeyPem.GetAsString())

Dim sbPrivateKeyPem As New Chilkat.StringBuilder
success = sbPrivateKeyPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",bCrlf)
success = sbPrivateKeyPem.AppendLine("MIICXgIBAAKBgQDCFENGw33yGihy92pDjZQhl0C36rPJj+CvfSC8+q28hxA161QF",bCrlf)
success = sbPrivateKeyPem.AppendLine("NUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6Z4UMR7EOcpfdUE9Hf3m/hs+F",bCrlf)
success = sbPrivateKeyPem.AppendLine("UR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJwoYi+1hqp1fIekaxsyQIDAQAB",bCrlf)
success = sbPrivateKeyPem.AppendLine("AoGBAJR8ZkCUvx5kzv+utdl7T5MnordT1TvoXXJGXK7ZZ+UuvMNUCdN2QPc4sBiA",bCrlf)
success = sbPrivateKeyPem.AppendLine("QWvLw1cSKt5DsKZ8UETpYPy8pPYnnDEz2dDYiaew9+xEpubyeW2oH4Zx71wqBtOK",bCrlf)
success = sbPrivateKeyPem.AppendLine("kqwrXa/pzdpiucRRjk6vE6YY7EBBs/g7uanVpGibOVAEsqH1AkEA7DkjVH28WDUg",bCrlf)
success = sbPrivateKeyPem.AppendLine("f1nqvfn2Kj6CT7nIcE3jGJsZZ7zlZmBmHFDONMLUrXR/Zm3pR5m0tCmBqa5RK95u",bCrlf)
success = sbPrivateKeyPem.AppendLine("412jt1dPIwJBANJT3v8pnkth48bQo/fKel6uEYyboRtA5/uHuHkZ6FQF7OUkGogc",bCrlf)
success = sbPrivateKeyPem.AppendLine("mSJluOdc5t6hI1VsLn0QZEjQZMEOWr+wKSMCQQCC4kXJEsHAve77oP6HtG/IiEn7",bCrlf)
success = sbPrivateKeyPem.AppendLine("kpyUXRNvFsDE0czpJJBvL/aRFUJxuRK91jhjC68sA7NsKMGg5OXb5I5Jj36xAkEA",bCrlf)
success = sbPrivateKeyPem.AppendLine("gIT7aFOYBFwGgQAQkWNKLvySgKbAZRTeLBacpHMuQdl1DfdntvAyqpAZ0lY0RKmW",bCrlf)
success = sbPrivateKeyPem.AppendLine("G6aFKaqQfOXKCyWoUiVknQJAXrlgySFci/2ueKlIE1QqIiLSZ8V8OlpFLRnb1pzI",bCrlf)
success = sbPrivateKeyPem.AppendLine("7U1yQXnTAEFYM560yJlzUpOb1V4cScGd365tiSMvxLOvTA==",bCrlf)
success = sbPrivateKeyPem.AppendLine("-----END RSA PRIVATE KEY-----",bCrlf)

Dim privKey As New Chilkat.PrivateKey
success = privKey.LoadPem(sbPrivateKeyPem.GetAsString())

//    All examples use this request:
// 
//    POST /foo?param=value&pet=dog HTTP/1.1
//    Host: example.com
//    Date: Sun, 05 Jan 2014 21:31:40 GMT
//    Content-Type: application/json
//    Digest: SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=
//    Content-Length: 18
// 
//    {"hello": "world"}

// C.1.  Default Test
// 
//    If a list of headers is not included, the date is the only header
//    that is signed by default.  The string to sign would be:
// 
//    date: Sun, 05 Jan 2014 21:31:40 GMT
// 
//    The Authorization header would be:
// 
//    Authorization: Signature keyId="Test",algorithm="rsa-sha256",
//    signature="SjWJWbWN7i0wzBvtPl8rbASWz5xQW6mcJmn+ibttBqtifLN7Sazz
//    6m79cNfwwb8DMJ5cou1s7uEGKKCs+FLEEaDV5lp7q25WqS+lavg7T8hc0GppauB
//    6hbgEKTwblDHYGEtbGmtdHgVCk9SuS13F0hZ8FD0k/5OxEPXe5WozsbM="
// 
//    The Signature header would be:
// 
//    Signature: keyId="Test",algorithm="rsa-sha256",
//    signature="SjWJWbWN7i0wzBvtPl8rbASWz5xQW6mcJmn+ibttBqtifLN7Sazz
//    6m79cNfwwb8DMJ5cou1s7uEGKKCs+FLEEaDV5lp7q25WqS+lavg7T8hc0GppauB
//    6hbgEKTwblDHYGEtbGmtdHgVCk9SuS13F0hZ8FD0k/5OxEPXe5WozsbM="
// 

Dim dtNow As New Chilkat.CkDateTime
success = dtNow.SetFromCurrentSystemTime()
Dim dateStr As String
dateStr = dtNow.GetAsRfc822(False)

// To duplicate the above result, we'll hard-code the date string.
dateStr = "Sun, 05 Jan 2014 21:31:40 GMT"

Dim rsa As New Chilkat.Rsa
success = rsa.ImportPrivateKeyObj(privKey)
If (success = False) Then
    System.DebugLog(rsa.LastErrorText)
    Return
End If

Dim sbStringToSign As New Chilkat.StringBuilder
success = sbStringToSign.Append("date: ")
success = sbStringToSign.Append(dateStr)

rsa.EncodingMode = "base64"
Dim b64Signature As String
b64Signature = rsa.SignStringENC(sbStringToSign.GetAsString(),"SHA256")
System.DebugLog(b64Signature)
System.DebugLog("---------------------------")

// The result should be:
// SjWJWbWN7i0wzBvtPl8rbASW ... FD0k/5OxEPXe5WozsbM=

// ----------------------------------------------------------------------------------------------------

// C.2.  Basic Test
// 
//    The minimum recommended data to sign is the (request-target), host,
//    and date.  In this case, the string to sign would be:
// 
//    (request-target): post /foo?param=value&pet=dog
//    host: example.com
//    date: Sun, 05 Jan 2014 21:31:40 GMT
// 
//    The Authorization header would be:
// 
//    Authorization: Signature keyId="Test",algorithm="rsa-sha256",
//    headers="(request-target) host date", signature="qdx+H7PHHDZgy4
//    y/Ahn9Tny9V3GP6YgBPyUXMmoxWtLbHpUnXS2mg2+SbrQDMCJypxBLSPQR2aAjn
//    7ndmw2iicw3HMbe8VfEdKFYRqzic+efkb3nndiv/x1xSHDJWeSWkx3ButlYSuBs
//    kLu6kd9Fswtemr3lgdDEmn04swr2Os0="

sbStringToSign.Clear 
success = sbStringToSign.Append("(request-target): ")
success = sbStringToSign.AppendLine("post /foo?param=value&pet=dog",False)
success = sbStringToSign.Append("host: ")
success = sbStringToSign.AppendLine("example.com",False)
success = sbStringToSign.Append("date: ")
success = sbStringToSign.Append(dateStr)

System.DebugLog("StringToSign:")
System.DebugLog(sbStringToSign.GetAsString())
b64Signature = rsa.SignStringENC(sbStringToSign.GetAsString(),"SHA256")
System.DebugLog(b64Signature)
System.DebugLog("---------------------------")

// The result should be:
// qdx+H7PHHDZgy4y/Ahn ... mn04swr2Os0=

 

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