Class: OpenSSL::Cipher

Inherits:
Object
  • Object
show all
Defined in:
ext/openssl/cipher/aead/aead.c

Defined Under Namespace

Classes: CipherError

Instance Method Summary collapse

Instance Method Details

#aad=(data) ⇒ Object 



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# File 'ext/openssl/cipher/aead/aead.c', line 64

static VALUE
ossl_cipher_set_aad(VALUE self, VALUE data)
{
    EVP_CIPHER_CTX *ctx;
    char           *in      = NULL;
    int             in_len  = 0;
    int             out_len = 0;

    StringValue(data);

    in     = (unsigned char *) RSTRING_PTR(data);
    in_len = RSTRING_LEN(data);

    GetCipher(self, ctx);

    if (!EVP_CipherUpdate(ctx, NULL, &out_len, in, in_len))
        ossl_raise(eCipherError, NULL);

    return self;
}

#gcm_iv_len=(iv_length) ⇒ Object 



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# File 'ext/openssl/cipher/aead/aead.c', line 129

static VALUE
ossl_cipher_set_iv_length(VALUE self, VALUE iv_length)
{
    EVP_CIPHER_CTX *ctx;
    int             ivlen = NUM2INT(iv_length);

    GetCipher(self, ctx);

#ifndef EVP_CTRL_GCM_SET_IVLEN
    ossl_raise(eCipherError, "your version of OpenSSL doesn't support GCM");
#else
    if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_IVLEN, ivlen, NULL))
        ossl_raise(eCipherError, NULL);
#endif

    return iv_length;
}

#gcm_tag ⇒ Object 



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# File 'ext/openssl/cipher/aead/aead.c', line 85

static VALUE
ossl_cipher_get_tag(VALUE self)
{
    EVP_CIPHER_CTX *ctx;
    VALUE           tag;

    tag = rb_str_new(NULL, 16);

    GetCipher(self, ctx);

#ifndef EVP_CTRL_GCM_GET_TAG
    ossl_raise(eCipherError, "your version of OpenSSL doesn't support GCM");
#else
    if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_GET_TAG, 16, (unsigned char *)RSTRING_PTR(tag)))
        ossl_raise(eCipherError, NULL);
#endif

    return tag;
}

#gcm_tag=(data) ⇒ Object 



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# File 'ext/openssl/cipher/aead/aead.c', line 105

static VALUE
ossl_cipher_set_tag(VALUE self, VALUE data)
{
    EVP_CIPHER_CTX *ctx;
    char           *in     = NULL;
    int             in_len = 0;

    StringValue(data);

    in     = (unsigned char *) RSTRING_PTR(data);
    in_len = RSTRING_LEN(data);

    GetCipher(self, ctx);

#ifndef EVP_CTRL_GCM_SET_TAG
    ossl_raise(eCipherError, "your version of OpenSSL doesn't support GCM");
#else
    if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_TAG, in_len, in))
        ossl_raise(eCipherError, NULL);
#endif

    return data;
}

#verify ⇒ Object 



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# File 'ext/openssl/cipher/aead/aead.c', line 147

static VALUE
ossl_cipher_verify(VALUE self)
{
    EVP_CIPHER_CTX *ctx;
    int             out_len = 0;

    GetCipher(self, ctx);

    if (!EVP_CipherUpdate(ctx, NULL, &out_len, NULL, 0))
        ossl_raise(eCipherError, "ciphertext failed authentication step");

    return rb_str_new(0, 0);
}