Decrypt a JWE into a StringBuilder

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.DecryptSb, which decrypts a recipient of a loaded JWE and writes the plaintext into a StringBuilder.

#include <C_CkJwe.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJwe jwe;
    const char *jweCompact;
    const char *base64Key;
    HCkStringBuilder sbContent;

    success = FALSE;

    jwe = CkJwe_Create();

    //  Load the JWE compact serialization to be decrypted.
    jweCompact = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>";
    success = CkJwe_LoadJwe(jwe,jweCompact);
    if (success == FALSE) {
        printf("%s\n",CkJwe_lastErrorText(jwe));
        CkJwe_Dispose(jwe);
        return;
    }

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
    //  from a secure source rather than hard-coding it.
    base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
    success = CkJwe_SetWrappingKey(jwe,0,base64Key,"base64");
    if (success == FALSE) {
        printf("%s\n",CkJwe_lastErrorText(jwe));
        CkJwe_Dispose(jwe);
        return;
    }

    //  Decrypt recipient index 0, writing the plaintext into a StringBuilder.
    sbContent = CkStringBuilder_Create();
    success = CkJwe_DecryptSb(jwe,0,"utf-8",sbContent);
    if (success == FALSE) {
        printf("%s\n",CkJwe_lastErrorText(jwe));
        CkJwe_Dispose(jwe);
        CkStringBuilder_Dispose(sbContent);
        return;
    }

    printf("%s\n",CkStringBuilder_getAsString(sbContent));


    CkJwe_Dispose(jwe);
    CkStringBuilder_Dispose(sbContent);

    }