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(Classic ASP) JWS Using RSASSA-PSS using SHA-256 and MGF1 with SHA-256Creates and validates a JSON Web Signature (JWS) using RSASSA-PSS using SHA-256 and MGF1 with SHA-256. Chilkat supports all of the following JWS algorithms: +--------------+-------------------------------+--------------------+ | "alg" Param | Digital Signature or MAC | Implementation | | Value | Algorithm | Requirements | +--------------+-------------------------------+--------------------+ | HS256 | HMAC using SHA-256 | Required | | HS384 | HMAC using SHA-384 | Optional | | HS512 | HMAC using SHA-512 | Optional | | RS256 | RSASSA-PKCS1-v1_5 using | Recommended | | | SHA-256 | | | RS384 | RSASSA-PKCS1-v1_5 using | Optional | | | SHA-384 | | | RS512 | RSASSA-PKCS1-v1_5 using | Optional | | | SHA-512 | | | ES256 | ECDSA using P-256 and SHA-256 | Recommended+ | | ES384 | ECDSA using P-384 and SHA-384 | Optional | | ES512 | ECDSA using P-521 and SHA-512 | Optional | | PS256 | RSASSA-PSS using SHA-256 and | Optional | | | MGF1 with SHA-256 | | | PS384 | RSASSA-PSS using SHA-384 and | Optional | | | MGF1 with SHA-384 | | | PS512 | RSASSA-PSS using SHA-512 and | Optional | | | MGF1 with SHA-512 | | +--------------+-------------------------------+--------------------+ Note: This example requires Chilkat v9.5.0.66 or greater.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' This requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. ' Note: This example requires Chilkat v9.5.0.66 or greater. ' Use the following RSA key loaded from JWK format. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder") set sbJwk = Server.CreateObject("Chilkat.StringBuilder") success = sbJwk.Append("{""kty"":""RSA"",") success = sbJwk.Append("""n"":""ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx") success = sbJwk.Append("HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs") success = sbJwk.Append("D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH") success = sbJwk.Append("SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV") success = sbJwk.Append("MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8") success = sbJwk.Append("NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ"",") success = sbJwk.Append("""e"":""AQAB"",") success = sbJwk.Append("""d"":""Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I") success = sbJwk.Append("jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0") success = sbJwk.Append("BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn") success = sbJwk.Append("439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT") success = sbJwk.Append("CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh") success = sbJwk.Append("BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ"",") success = sbJwk.Append("""p"":""4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi") success = sbJwk.Append("YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG") success = sbJwk.Append("BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc"",") success = sbJwk.Append("""q"":""uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa") success = sbJwk.Append("ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA") success = sbJwk.Append("-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc"",") success = sbJwk.Append("""dp"":""BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q") success = sbJwk.Append("CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb") success = sbJwk.Append("34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0"",") success = sbJwk.Append("""dq"":""h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa") success = sbJwk.Append("7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky") success = sbJwk.Append("NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU"",") success = sbJwk.Append("""qi"":""IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o") success = sbJwk.Append("y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU") success = sbJwk.Append("W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U""") success = sbJwk.Append("}") ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.PrivateKey") set rsaKey = Server.CreateObject("Chilkat.PrivateKey") ' Note: This example loads the RSA key from JWK format. Any format can be loaded ' into the private key object. (See the online reference documentation..) success = rsaKey.LoadJwk(sbJwk.GetAsString()) If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( rsaKey.LastErrorText) & "</pre>" Response.End End If ' Create the JWS Protected Header ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject") set jwsProtHdr = Server.CreateObject("Chilkat.JsonObject") success = jwsProtHdr.AppendString("alg","PS256") ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Jws") set jws = Server.CreateObject("Chilkat.Jws") ' Set the protected header: signatureIndex = 0 success = jws.SetProtectedHeader(signatureIndex,jwsProtHdr) ' Set the RSA key: success = jws.SetPrivateKey(signatureIndex,rsaKey) ' Set the payload. bIncludeBom = 0 payloadStr = "In our village, folks say God crumbles up the old moon into stars." success = jws.SetPayload(payloadStr,"utf-8",bIncludeBom) ' Create the JWS ' By default, the compact serialization is used. jwsCompact = jws.CreateJws() If (jws.LastMethodSuccess <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( jws.LastErrorText) & "</pre>" Response.End End If Response.Write "<pre>" & Server.HTMLEncode( "JWS: " & jwsCompact) & "</pre>" ' Note: RSA PSS padding uses random values, so the output will be different each time a signature is produced. ' sample output: ' JWS: eyJhbGciOiJQUzI1NiJ9.SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu.TRWhwRo5dMv9-8OzrInfJTwmUGYgjLfHk8lqF072ND-FmLWEBnUTOpY8oJXp8FdWw2SalbdOeNlrtlJjwk4XK8Ql2iJ_2qMCtxsvLPhKBOqFoAF4aBvTOEDVJDxf0DaBSiydEEtfTVV2iwBcjWabu5J2XieR5y7QZQtuHsn7T3qKBvCcCejN3Y2oqAT3qMHvu1fTms1r_91wBn_K7Wjd9UkZ1n02qQcUHJznR_OF2BgN7_KWIDAF9ZS9keoju2NPpPelO4yxa2XUPnehY3G7dHKoCxUEQR4d2Xc5voqDASTVCDqQS4PVOZdvT3Ein6-SanAlCwbWBbkvT8g6-5PImQ ' Now load the JWS, validate, and recover the original text. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Jws") set jws2 = Server.CreateObject("Chilkat.Jws") ' Load the JWS. success = jws2.LoadJws(jwsCompact) ' rsaPubKey is a Chilkat.PublicKey Set rsaPubKey = rsaKey.GetPublicKey() ' Set the RSA public key used for validation. signatureIndex = 0 success = jws2.SetPublicKey(signatureIndex,rsaPubKey) ' Validate the 1st (and only) signature at index 0.. v = jws2.Validate(signatureIndex) If (v < 0) Then ' Perhaps Chilkat was not unlocked or the trial expired.. Response.Write "<pre>" & Server.HTMLEncode( "Method call failed for some other reason.") & "</pre>" Response.Write "<pre>" & Server.HTMLEncode( jws2.LastErrorText) & "</pre>" Response.End End If If (v = 0) Then Response.Write "<pre>" & Server.HTMLEncode( "Invalid signature. The RSA key was incorrect, the JWS was invalid, or both.") & "</pre>" Response.End End If ' If we get here, the signature was validated.. Response.Write "<pre>" & Server.HTMLEncode( "Signature validated.") & "</pre>" ' Recover the original content: Response.Write "<pre>" & Server.HTMLEncode( jws2.GetPayload("utf-8")) & "</pre>" ' Examine the protected header: ' joseHeader is a Chilkat.JsonObject Set joseHeader = jws2.GetProtectedHeader(signatureIndex) If (jws2.LastMethodSuccess <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( "No protected header found at the given index.") & "</pre>" Response.End End If joseHeader.EmitCompact = 0 Response.Write "<pre>" & Server.HTMLEncode( "Protected (JOSE) header:") & "</pre>" Response.Write "<pre>" & Server.HTMLEncode( joseHeader.Emit()) & "</pre>" ' Output: ' Signature validated. ' In our village, folks say God crumbles up the old moon into stars. ' Protected (JOSE) header: ' { ' "alg": "PS256" ' } %> </body> </html> |
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