int
crypto_aead_chacha20poly1305_ietf_encrypt(unsigned char *c,
unsigned long long *clen_p,
const unsigned char *m,
unsigned long long mlen,
const unsigned char *ad,
unsigned long long adlen,
const unsigned char *nsec,
const unsigned char *npub,
const unsigned char *k)
{
unsigned long long clen = 0ULL;
int ret;
if (mlen > UINT64_MAX - crypto_aead_chacha20poly1305_ietf_ABYTES) {
abort(); /* LCOV_EXCL_LINE */
}
ret = crypto_aead_chacha20poly1305_ietf_encrypt_detached(c,
c + mlen, NULL,
m, mlen,
ad, adlen,
nsec, npub, k);
if (clen_p != NULL) {
if (ret == 0) {
clen = mlen + crypto_aead_chacha20poly1305_ietf_ABYTES;
}
*clen_p = clen;
}
return ret;
}
psResSize_t psChacha20Poly1305IetfEncryptDetached(
psChacha20Poly1305Ietf_t *Context_p,
const unsigned char *Plaintext_p,
psSizeL_t PlaintextNBytes,
const unsigned char Iv_p[PS_EXACTLY(PS_CHACHA20POLY1305_IETF_NPUBBYTES)],
const unsigned char *Aad_p,
psSize_t AadNBytes,
unsigned char *Ciphertext_p,
unsigned char Mac_p[PS_EXACTLY(PS_CHACHA20POLY1305_IETF_ABYTES)])
{
int ret;
/* Check input is not too large for this API. */
if (PlaintextNBytes > (psSizeL_t)PS_RES_SIZE_OK_MAX)
{
return PS_ARG_FAIL;
}
ret = crypto_aead_chacha20poly1305_ietf_encrypt_detached(
Ciphertext_p,
Mac_p,
NULL,
(const unsigned char *)Plaintext_p,
(unsigned long long)PlaintextNBytes,
(const unsigned char *)Aad_p,
(unsigned long long)AadNBytes,
NULL,
(const unsigned char *)Iv_p,
(const unsigned char *)Context_p->key);
if (ret == 0)
{
return (psResSize_t) PlaintextNBytes;
}
return PS_FAIL;
}
