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(Unicode C) RSA Decrypt using PEMThis example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file.
#include <C_CkRsaW.h> #include <C_CkPrivateKeyW.h> void ChilkatSample(void) { HCkRsaW rsa; HCkPrivateKeyW key; BOOL success; const wchar_t *encryptedStr; BOOL usePrivateKey; const wchar_t *decryptedStr; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rsa = CkRsaW_Create(); key = CkPrivateKeyW_Create(); // Load an RSA private key from an unencrypted PEM file: // (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.) success = CkPrivateKeyW_LoadPemFile(key,L"qa_data/rsa/decryptTest/priv.pem"); if (success != TRUE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(key)); CkRsaW_Dispose(rsa); CkPrivateKeyW_Dispose(key); return; } // Make the key available to the RSA object success = CkRsaW_ImportPrivateKeyObj(rsa,key); if (success != TRUE) { wprintf(L"%s\n",CkRsaW_lastErrorText(rsa)); CkRsaW_Dispose(rsa); CkPrivateKeyW_Dispose(key); return; } encryptedStr = L"pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA=="; CkRsaW_putEncodingMode(rsa,L"base64"); usePrivateKey = TRUE; decryptedStr = CkRsaW_decryptStringENC(rsa,encryptedStr,usePrivateKey); wprintf(L"Decrypted:\n"); wprintf(L"%s\n",decryptedStr); CkRsaW_Dispose(rsa); CkPrivateKeyW_Dispose(key); } |
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