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(Unicode C) Convert Java KeyStore to PKCS12 / PFXLoads a Java keystore file and saves it as a PKCS12 / PFX. A Java keystore (JKS) can contain two types of entries: (1) trusted root certificates or (2) private keys + cert chains. Usually a JKS will contain all entries of one type or another (and thus a particular JKS serves one purpose or another; meaning that a JKS containing trusted roots is used as a source for verifying pre-trusted roots, and a JKS containing private keys (and cert chains) is used as a secure, encrypted store for private keys). A PKCS12 / PFX typically contains one or more private keys, along with each private key's certificate chain. Therefore, it typically makes sense to only write the private key entries to a PKCS12 (and the associated certificate chains). If a JKS contains trusted root certificates, it makes more sense to conver it to a PEM file (such as the CA cert bundle in PEM format from mozilla.org).
#include <C_CkJavaKeyStoreW.h> #include <C_CkPfxW.h> #include <C_CkPrivateKeyW.h> #include <C_CkCertChainW.h> void ChilkatSample(void) { HCkJavaKeyStoreW jks; const wchar_t *jksPassword; BOOL success; HCkPfxW pkcs12; int numPrivateKeys; int i; HCkPrivateKeyW privKey; HCkCertChainW certChain; const wchar_t *pkcs12Password; // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. jks = CkJavaKeyStoreW_Create(); jksPassword = L"myJksPassword"; // Load the Java keystore from a file. The JKS file password is used // to verify the keyed digest that is found at the very end of the keystore. // It verifies that the keystore has not been modified. success = CkJavaKeyStoreW_LoadFile(jks,jksPassword,L"/someDir/keyStore.jks"); if (success != TRUE) { wprintf(L"%s\n",CkJavaKeyStoreW_lastErrorText(jks)); CkJavaKeyStoreW_Dispose(jks); return; } // To convert, we'll access the private key entries // from the JKS, add each to the PKCS12, and then save the PKCS12. pkcs12 = CkPfxW_Create(); numPrivateKeys = CkJavaKeyStoreW_getNumPrivateKeys(jks); // For each private key entry, get the private key and // the associated certificate chain. // Each private key is password protected. Usually it is the same // password as used for the keyed digest of the entire JKS. // However, this does not have to be. The password is passed // here to handle the possibility of each private key requiring // a different password. i = 0; while (i < numPrivateKeys) { privKey = CkJavaKeyStoreW_GetPrivateKey(jks,jksPassword,i); wprintf(L"%s\n",CkJavaKeyStoreW_getPrivateKeyAlias(jks,i)); certChain = CkJavaKeyStoreW_GetCertChain(jks,i); // Add the private key and it's associated certificate chain to the PKCS12. success = CkPfxW_AddPrivateKey(pkcs12,privKey,certChain); if (success != TRUE) { wprintf(L"%s\n",CkPfxW_lastErrorText(pkcs12)); CkCertChainW_Dispose(certChain); CkPrivateKeyW_Dispose(privKey); CkJavaKeyStoreW_Dispose(jks); CkPfxW_Dispose(pkcs12); return; } CkCertChainW_Dispose(certChain); CkPrivateKeyW_Dispose(privKey); i = i + 1; } // Save the PKCS12 / PFX to a file. // The password can be the same as the JKS password, or something new. // (With the PKCS12 format, there is a single password for the entire contents // of the file. With the JKS format, there is flexibility in allowing each private key // to have it's own password.) pkcs12Password = L"myNewPassword"; success = CkPfxW_ToFile(pkcs12,pkcs12Password,L"/pkcs12_files/myPfx.p12"); if (success != TRUE) { wprintf(L"%s\n",CkPfxW_lastErrorText(pkcs12)); } else { wprintf(L"Successfully saved to PKCS12 format.\n"); } CkJavaKeyStoreW_Dispose(jks); CkPfxW_Dispose(pkcs12); } |
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