Load a JWE from a String

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.LoadJwe, which loads a JWE from its compact serialization string so it can be decrypted.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

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#include <C_CkJwe.h>

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

    success = FALSE;

    jwe = CkJwe_Create();

    //  Load a JWE from its compact serialization string.
    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;
    }

    //  The loaded JWE can now be decrypted.
    content = CkJwe_decrypt(jwe,0,"utf-8");
    if (CkJwe_getLastMethodSuccess(jwe) == FALSE) {
        printf("%s\n",CkJwe_lastErrorText(jwe));
        CkJwe_Dispose(jwe);
        return;
    }

    printf("%s\n",content);


    CkJwe_Dispose(jwe);

    }