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(Unicode C) Convert Let's Encrypt PEM Files to a PFXDemonstrates how to convert the .pem files provided by Let's Encrypt to a single PFX.
#include <C_CkStringBuilderW.h> #include <C_CkPfxW.h> void ChilkatSample(void) { HCkStringBuilderW sbPem; BOOL success; HCkStringBuilderW sbFullChainPem; HCkPfxW pfx; const wchar_t *pfxPassword; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Let's Encrypt provides four .pem files // 1. fullchain.pem // 2. privkey.pem // 3. cert.pem // 4. chain.pem // The cert.pem and chain.pem are redundant. // The fullchain.pem is composed of the cert.pem and chain.pem. // To convert the PEM's to a single .pfx, we don't need the redundant data. // The privkey.pem and fullchain.pem provide the required data. // We can ignore cert.pem and chain.pem (because those certs are already found in fullchain.pem). // We need a single .pem file that contains both the private key, the cert, // and the certs in the chain of authentication. // Let's combine priveky.pem and fullchain.pem into a single .pem sbPem = CkStringBuilderW_Create(); success = CkStringBuilderW_LoadFile(sbPem,L"qa_data/pem/lets_encrypt/privkey.pem",L"utf-8"); if (success == FALSE) { wprintf(L"Failed to load privkey.pem\n"); CkStringBuilderW_Dispose(sbPem); return; } // To be safe, append a blank line.. CkStringBuilderW_AppendLine(sbPem,L"",FALSE); sbFullChainPem = CkStringBuilderW_Create(); success = CkStringBuilderW_LoadFile(sbFullChainPem,L"qa_data/pem/lets_encrypt/fullchain.pem",L"utf-8"); if (success == FALSE) { wprintf(L"Failed to load fullchain.pem\n"); CkStringBuilderW_Dispose(sbPem); CkStringBuilderW_Dispose(sbFullChainPem); return; } // Append the full cert chain PEM to the private key PEM. CkStringBuilderW_AppendSb(sbPem,sbFullChainPem); // Load the combined PEM into a Chilkat PFX object. pfx = CkPfxW_Create(); success = CkPfxW_LoadPem(pfx,CkStringBuilderW_getAsString(sbPem),L"no password required"); if (success == FALSE) { wprintf(L"%s\n",CkPfxW_lastErrorText(pfx)); CkStringBuilderW_Dispose(sbPem); CkStringBuilderW_Dispose(sbFullChainPem); CkPfxW_Dispose(pfx); return; } // Write the PFX w/ a password. pfxPassword = L"secret"; success = CkPfxW_ToFile(pfx,pfxPassword,L"qa_output/sample.pfx"); if (success == FALSE) { wprintf(L"%s\n",CkPfxW_lastErrorText(pfx)); CkStringBuilderW_Dispose(sbPem); CkStringBuilderW_Dispose(sbFullChainPem); CkPfxW_Dispose(pfx); return; } wprintf(L"Success!\n"); CkStringBuilderW_Dispose(sbPem); CkStringBuilderW_Dispose(sbFullChainPem); CkPfxW_Dispose(pfx); } |
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