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(Unicode C) Duplicate OpensSSL Command that Decrypts Binary DERThis example duplicates the following: openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).
#include <C_CkCrypt2W.h> #include <C_CkPemW.h> #include <C_CkPrivateKeyW.h> #include <C_CkCertW.h> void ChilkatSample(void) { HCkCrypt2W crypt; HCkPemW pem; BOOL success; HCkPrivateKeyW privkey; HCkCertW cert; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt = CkCrypt2W_Create(); CkCrypt2W_putCryptAlgorithm(crypt,L"pki"); pem = CkPemW_Create(); success = CkPemW_LoadPemFile(pem,L"qa_data/pem/myPem.pem",L"password"); if (success != TRUE) { wprintf(L"%s\n",CkPemW_lastErrorText(pem)); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); return; } privkey = CkPemW_GetPrivateKey(pem,0); if (CkPemW_getLastMethodSuccess(pem) != TRUE) { wprintf(L"%s\n",CkPemW_lastErrorText(pem)); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); return; } cert = CkPemW_GetCert(pem,0); if (CkPemW_getLastMethodSuccess(pem) != TRUE) { CkPrivateKeyW_Dispose(privkey); wprintf(L"%s\n",CkPemW_lastErrorText(pem)); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); return; } success = CkCrypt2W_SetDecryptCert2(crypt,cert,privkey); if (success != TRUE) { CkPrivateKeyW_Dispose(privkey); CkCertW_Dispose(cert); wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt)); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); return; } CkPrivateKeyW_Dispose(privkey); CkCertW_Dispose(cert); success = CkCrypt2W_CkDecryptFile(crypt,L"qa_data/infile.enc",L"qa_output/outfile.dat"); if (success != TRUE) { wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt)); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); return; } wprintf(L"Success.\n"); CkCrypt2W_Dispose(crypt); CkPemW_Dispose(pem); } |
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