Lianja

Signing HTTP Messages

See more RSA Examples

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

llSuccess = .F.

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

llBCrlf = .T.
loSbPublicKeyPem = createobject("CkStringBuilder")
loSbPublicKeyPem.AppendLine("-----BEGIN PUBLIC KEY-----",llBCrlf)
loSbPublicKeyPem.AppendLine("MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCFENGw33yGihy92pDjZQhl0C3",llBCrlf)
loSbPublicKeyPem.AppendLine("6rPJj+CvfSC8+q28hxA161QFNUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6",llBCrlf)
loSbPublicKeyPem.AppendLine("Z4UMR7EOcpfdUE9Hf3m/hs+FUR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJw",llBCrlf)
loSbPublicKeyPem.AppendLine("oYi+1hqp1fIekaxsyQIDAQAB",llBCrlf)
loSbPublicKeyPem.AppendLine("-----END PUBLIC KEY-----",llBCrlf)

loPubKey = createobject("CkPublicKey")
loPubKey.LoadFromString(loSbPublicKeyPem.GetAsString())

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

loPrivKey = createobject("CkPrivateKey")
loPrivKey.LoadPem(loSbPrivateKeyPem.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="
// 

loDtNow = createobject("CkDateTime")
llSuccess = loDtNow.SetFromCurrentSystemTime()
lcDateStr = loDtNow.GetAsRfc822(.F.)

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

loRsa = createobject("CkRsa")
llSuccess = loRsa.UsePrivateKey(loPrivKey)
if (llSuccess = .F.) then
    ? loRsa.LastErrorText
    release loSbPublicKeyPem
    release loPubKey
    release loSbPrivateKeyPem
    release loPrivKey
    release loDtNow
    release loRsa
    return
endif

loSbStringToSign = createobject("CkStringBuilder")
loSbStringToSign.Append("date: ")
loSbStringToSign.Append(lcDateStr)

loRsa.EncodingMode = "base64"
lcB64Signature = loRsa.SignStringENC(loSbStringToSign.GetAsString(),"SHA256")
? lcB64Signature
? "---------------------------"

// 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="

loSbStringToSign.Clear()
loSbStringToSign.Append("(request-target): ")
loSbStringToSign.AppendLine("post /foo?param=value&pet=dog",.F.)
loSbStringToSign.Append("host: ")
loSbStringToSign.AppendLine("example.com",.F.)
loSbStringToSign.Append("date: ")
loSbStringToSign.Append(lcDateStr)

? "StringToSign:"
? loSbStringToSign.GetAsString()
lcB64Signature = loRsa.SignStringENC(loSbStringToSign.GetAsString(),"SHA256")
? lcB64Signature
? "---------------------------"

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


release loSbPublicKeyPem
release loPubKey
release loSbPrivateKeyPem
release loPrivKey
release loDtNow
release loRsa
release loSbStringToSign