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(Unicode C) P7S - Access Signature Information (date/time, certificate used, etc.)Examine a PKCS7 signature (.p7s) and get information about it. Note: This example requires Chilkat v9.5.0.75 or greater.
#include <C_CkBinDataW.h> #include <C_CkCrypt2W.h> #include <C_CkJsonObjectW.h> #include <C_CkDateTimeW.h> void ChilkatSample(void) { HCkBinDataW bd; BOOL success; HCkCrypt2W crypt; HCkJsonObjectW json; int i; int count_i; const wchar_t *strVal; const wchar_t *certSerialNumber; const wchar_t *certIssuerCN; const wchar_t *certIssuerDN; const wchar_t *certDigestAlgOid; const wchar_t *certDigestAlgName; const wchar_t *contentType; const wchar_t *signingTime; const wchar_t *messageDigest; const wchar_t *signingAlgOid; const wchar_t *signerDigest; HCkDateTimeW dt; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // First load the .p7s file into a BinData object.. bd = CkBinDataW_Create(); success = CkBinDataW_LoadFile(bd,L"qa_data/p7s/sample.p7s"); if (success != TRUE) { wprintf(L"Failed to load .p7s file.\n"); CkBinDataW_Dispose(bd); return; } // IMPORTANT: This example requires Chilkat v9.5.0.75 or greater. crypt = CkCrypt2W_Create(); // Assuming this is a signature that contains the original data that was signed.. success = CkCrypt2W_OpaqueVerifyBd(crypt,bd); if (success != TRUE) { wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt)); CkBinDataW_Dispose(bd); CkCrypt2W_Dispose(crypt); return; } // Examine the LastJsonData after signature verification.. json = CkCrypt2W_LastJsonData(crypt); CkJsonObjectW_putEmitCompact(json,FALSE); wprintf(L"%s\n",CkJsonObjectW_emit(json)); // -- // IMPORTANT: This example requires Chilkat v9.5.0.75 or greater. // -- // Sample output... // Go to http://tools.chilkat.io/jsonParse.cshtml // and paste the JSON into the online form to generate JSON parsing code. // { // "pkcs7": { // "verify": { // "digestAlgorithms": [ // "sha256" // ], // "signerInfo": [ // { // "cert": { // "serialNumber": "AAC5FC48C0FD8FBB", // "issuerCN": "AC ABCDEF RFB v5", // "issuerDN": "", // "digestAlgOid": "2.16.840.1.101.3.4.2.1", // "digestAlgName": "SHA-256" // }, // "contentType": "1.2.840.113549.1.7.1", // "signingTime": "180607195054Z", // "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=", // "signingAlgOid": "1.2.840.113549.1.1.11", // "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=" // }, // { // "cert": { // "serialNumber": "324FB38ABD59723F", // "issuerCN": "AC ABCDEF RFB v5", // "issuerDN": "", // "digestAlgOid": "2.16.840.1.101.3.4.2.1", // "digestAlgName": "SHA-256" // }, // "contentType": "1.2.840.113549.1.7.1", // "signingTime": "180608182517Z", // "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=", // "signingAlgOid": "1.2.840.113549.1.1.11", // "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=" // } // ] // } // } // } // dt = CkDateTimeW_Create(); i = 0; count_i = CkJsonObjectW_SizeOfArray(json,L"pkcs7.verify.digestAlgorithms"); while (i < count_i) { CkJsonObjectW_putI(json,i); strVal = CkJsonObjectW_stringOf(json,L"pkcs7.verify.digestAlgorithms[i]"); i = i + 1; } i = 0; count_i = CkJsonObjectW_SizeOfArray(json,L"pkcs7.verify.signerInfo"); while (i < count_i) { CkJsonObjectW_putI(json,i); certSerialNumber = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].cert.serialNumber"); certIssuerCN = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].cert.issuerCN"); certIssuerDN = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].cert.issuerDN"); certDigestAlgOid = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].cert.digestAlgOid"); certDigestAlgName = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].cert.digestAlgName"); contentType = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].contentType"); signingTime = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].signingTime"); // The signingTime isin UTCTime format. // UTCTime values take the form of either "YYMMDDhhmm[ss]Z" or "YYMMDDhhmm[ss](+|-)hhmm" // Starting in Chilkat v9.5.0.77, the SetFromTimestamp method auto-recognizes the UTCTime format and parses it correctly. success = CkDateTimeW_SetFromTimestamp(dt,signingTime); // To get the signingTime in other date/time formats, look at the online reference documentation for CkDateTime. // There are numerous methods such as GetAsDateTime, GetAsIso8601, GetAsUnixTime, GetAsRfc822, etc. messageDigest = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].messageDigest"); signingAlgOid = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].signingAlgOid"); signerDigest = CkJsonObjectW_stringOf(json,L"pkcs7.verify.signerInfo[i].signerDigest"); i = i + 1; } CkJsonObjectW_Dispose(json); // println crypt.LastErrorText; wprintf(L"Success.\n"); CkBinDataW_Dispose(bd); CkCrypt2W_Dispose(crypt); CkDateTimeW_Dispose(dt); } |
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