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(Unicode C) Encrypt/Decrypt using PFX to produce -----BEGIN PKCS7----- ... -----END PKCS7-----First we encrypt using a certificate + public key to produce output such as: -----BEGIN PKCS7----- MIIHPwYJKoZIhvcNAQcEoIIHMDCCBywC ... ... ... -----END PKCS7-----Then we decrypt using the cert + private key.
#include <C_CkCrypt2W.h> #include <C_CkCertW.h> #include <C_CkStringBuilderW.h> void ChilkatSample(void) { HCkCrypt2W crypt; HCkCertW cert; BOOL success; const wchar_t *toBeEncrypted; const wchar_t *encryptedStr; HCkStringBuilderW sb; const wchar_t *outStr; BOOL bCrlf; HCkCrypt2W decrypt; const wchar_t *decryptedText; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt = CkCrypt2W_Create(); // Specify the encryption to be used. // "pki" indicates "Public Key Infrastructure" and will create a PKCS7 encrypted (enveloped) message. CkCrypt2W_putCryptAlgorithm(crypt,L"pki"); CkCrypt2W_putPkcs7CryptAlg(crypt,L"aes"); CkCrypt2W_putKeyLength(crypt,128); CkCrypt2W_putOaepHash(crypt,L"sha256"); CkCrypt2W_putOaepPadding(crypt,TRUE); // A certificate is needed as the encryption key. // Althought the PFX contains the associated private key, we don't need it for encryption. // (A certificate usually contains the public key by default.) cert = CkCertW_Create(); success = CkCertW_LoadPfxFile(cert,L"qa_data/pfx/cert_test123.pfx",L"test123"); if (success != TRUE) { wprintf(L"%s\n",CkCertW_lastErrorText(cert)); CkCrypt2W_Dispose(crypt); CkCertW_Dispose(cert); return; } // Tell the crypt object to use the certificate. CkCrypt2W_SetEncryptCert(crypt,cert); toBeEncrypted = L"This string is to be encrypted."; // Get the result in multi-line BASE64 MIME format. CkCrypt2W_putEncodingMode(crypt,L"base64_mime"); encryptedStr = CkCrypt2W_encryptStringENC(crypt,toBeEncrypted); if (success != TRUE) { wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt)); CkCrypt2W_Dispose(crypt); CkCertW_Dispose(cert); return; } // Make a "-----BEGIN PKCS7-----" ... "-----END PKCS7-----" sandwich... sb = CkStringBuilderW_Create(); CkStringBuilderW_AppendLine(sb,L"-----BEGIN PKCS7-----",TRUE); CkStringBuilderW_Append(sb,encryptedStr); CkStringBuilderW_AppendLine(sb,L"-----END PKCS7-----",TRUE); outStr = CkStringBuilderW_getAsString(sb); wprintf(L"%s\n",outStr); // Sample output: // -----BEGIN PKCS7----- // MIICXAYJKoZIhvcNAQcDoIICTTCCAkkCAQAxggH0MIIB8AIBADCBrDCBlzELMAkGA1UEBhMCR0Ix // GzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMR // Q09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhlbnRpY2F0 // aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0ECEB6M1ZwZdZU7LrAIdurulmUwOAYJKoZIhvcNAQEHMCug // DzANBglghkgBZQMEAgEFAKEYMBYGCSqGSIb3DQEBCDAJBgUrDgMCGgUABIIBAK/BZG/iXJ8az7zL // 8EQ77mc+oDPQ4w1hyytK2ip4djkPVvTfYhcoDQ+G/DBU+urJfrVBi5H9gmpXwYyfKlyUxBVRVEJl // V/V5QQi4JmNTFbmgWh5tp9zDS98l6A2Va4Zs0Wy/owGLfvwitlxd1dsfVAV2hmBYS24BMpNcty5/ // 0atcKYmSou13G78ztTKdMy1tECgZy8kerMsPdDQbSxEZkT3KpQ8C5uEQqYF3bIVaeZzha/Ywieh/ // tvO0T4aAmeJufwkNdVECmU7kuhnNaVPXknFl7jeibTl6zA/VcJKBKcIYT9FRC7KjdooI8q+jtQ/V // k6RP4POaowkFg1QWRPEWeqIwTAYJKoZIhvcNAQcBMB0GCWCGSAFlAwQBAgQQEEFQduqeJqXQXzy4 // JpkoDoAgdldJDB9zEkpMpgr5/fR2iLvh5kC6BPfhOYjsawBY4Ok= // -----END PKCS7----- // ---------------------------------------------------------------------------------------- // Let's Decrypt the above string. // Start with what was produced above.. CkStringBuilderW_Clear(sb); bCrlf = TRUE; CkStringBuilderW_AppendLine(sb,L"-----BEGIN PKCS7-----",bCrlf); CkStringBuilderW_AppendLine(sb,L"MIICXAYJKoZIhvcNAQcDoIICTTCCAkkCAQAxggH0MIIB8AIBADCBrDCBlzELMAkGA1UEBhMCR0Ix",bCrlf); CkStringBuilderW_AppendLine(sb,L"GzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgGA1UEChMR",bCrlf); CkStringBuilderW_AppendLine(sb,L"Q09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhlbnRpY2F0",bCrlf); CkStringBuilderW_AppendLine(sb,L"aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0ECEB6M1ZwZdZU7LrAIdurulmUwOAYJKoZIhvcNAQEHMCug",bCrlf); CkStringBuilderW_AppendLine(sb,L"DzANBglghkgBZQMEAgEFAKEYMBYGCSqGSIb3DQEBCDAJBgUrDgMCGgUABIIBAK/BZG/iXJ8az7zL",bCrlf); CkStringBuilderW_AppendLine(sb,L"8EQ77mc+oDPQ4w1hyytK2ip4djkPVvTfYhcoDQ+G/DBU+urJfrVBi5H9gmpXwYyfKlyUxBVRVEJl",bCrlf); CkStringBuilderW_AppendLine(sb,L"V/V5QQi4JmNTFbmgWh5tp9zDS98l6A2Va4Zs0Wy/owGLfvwitlxd1dsfVAV2hmBYS24BMpNcty5/",bCrlf); CkStringBuilderW_AppendLine(sb,L"0atcKYmSou13G78ztTKdMy1tECgZy8kerMsPdDQbSxEZkT3KpQ8C5uEQqYF3bIVaeZzha/Ywieh/",bCrlf); CkStringBuilderW_AppendLine(sb,L"tvO0T4aAmeJufwkNdVECmU7kuhnNaVPXknFl7jeibTl6zA/VcJKBKcIYT9FRC7KjdooI8q+jtQ/V",bCrlf); CkStringBuilderW_AppendLine(sb,L"k6RP4POaowkFg1QWRPEWeqIwTAYJKoZIhvcNAQcBMB0GCWCGSAFlAwQBAgQQEEFQduqeJqXQXzy4",bCrlf); CkStringBuilderW_AppendLine(sb,L"JpkoDoAgdldJDB9zEkpMpgr5/fR2iLvh5kC6BPfhOYjsawBY4Ok=",bCrlf); CkStringBuilderW_AppendLine(sb,L"-----END PKCS7-----",bCrlf); decrypt = CkCrypt2W_Create(); CkCrypt2W_putCryptAlgorithm(decrypt,L"pki"); // Use the same cert + private key from the PFX above. // For decryption, we need the private key. Given that the certificate was loaded from a PFX, // we should already have it. success = CkCrypt2W_SetDecryptCert(decrypt,cert); CkCrypt2W_putEncodingMode(decrypt,L"base64"); decryptedText = CkCrypt2W_decryptStringENC(decrypt,CkStringBuilderW_getBetween(sb,L"-----BEGIN PKCS7-----",L"-----END PKCS7-----")); wprintf(L"%s\n",decryptedText); CkCrypt2W_Dispose(crypt); CkCertW_Dispose(cert); CkStringBuilderW_Dispose(sb); CkCrypt2W_Dispose(decrypt); } |
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