Class: SelfCrypto::PK::Encryption

Inherits:
Data
  • Object
show all
Defined in:
ext/self_crypto/pk_encryption.c

Instance Method Summary collapse

Constructor Details

#initialize(recipientKey) ⇒ Object 



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# File 'ext/self_crypto/pk_encryption.c', line 33

static VALUE initialize(VALUE self, VALUE recipientKey) {
    OlmPkEncryption *this;
    TypedData_Get_Struct(self, OlmPkEncryption, &olm_pk_encryption_type, this);
    Check_Type(recipientKey, T_STRING);

    if (olm_pk_encryption_set_recipient_key(this,
            RSTRING_PTR(recipientKey), RSTRING_LEN(recipientKey)) == olm_error()) {
        raise_olm_error(olm_pk_encryption_last_error(this));
    }

    return self;
}

Instance Method Details

#encrypt(plaintext) ⇒ Object 



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# File 'ext/self_crypto/pk_encryption.c', line 46

static VALUE pk_encrypt(VALUE self, VALUE plaintext) {
    OlmPkEncryption *this;
    size_t ciphertextLen, macLen, ephemeralLen, randomLen;
    char *ciphertextPtr, *macPtr, *ephemeralPtr;
    VALUE retval;
    TypedData_Get_Struct(self, OlmPkEncryption, &olm_pk_encryption_type, this);
    Check_Type(plaintext, T_STRING);

    ciphertextLen = olm_pk_ciphertext_length(this, RSTRING_LEN(plaintext));
    ciphertextPtr = malloc_or_raise(ciphertextLen);
    macLen = olm_pk_mac_length(this);
    macPtr = malloc_or_raise(macLen);
    ephemeralLen = olm_pk_key_length();
    ephemeralPtr = malloc_or_raise(ephemeralLen);
    randomLen = olm_pk_encrypt_random_length(this);

    if (olm_pk_encrypt(this,
            RSTRING_PTR(plaintext), RSTRING_LEN(plaintext),
            ciphertextPtr, ciphertextLen,
            macPtr, macLen,
            ephemeralPtr, ephemeralLen,
            RSTRING_PTR(get_random(randomLen)), randomLen) == olm_error()) {
        free(ephemeralPtr);
        free(macPtr);
        free(ciphertextPtr);
        raise_olm_error(olm_pk_encryption_last_error(this));
    }

    retval = rb_funcall(rb_eval_string("SelfCrypto::PK::Message"), rb_intern("new"), 3,
            rb_str_new(ciphertextPtr, ciphertextLen),
            rb_str_new(macPtr, macLen),
            rb_str_new(ephemeralPtr, ephemeralLen));

    free(ephemeralPtr);
    free(macPtr);
    free(ciphertextPtr);

    return retval;
}