821fe3d3a4
Specifically, use 'const' for the key passed to the 'setkey' method and 'const' for the 'iv' passed to the 'reinit' method. Reviewed by: cem Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D21347
79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
/* This file is in the public domain. */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <crypto/chacha20/chacha.h>
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#include <opencrypto/xform_enc.h>
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static int
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chacha20_xform_setkey(u_int8_t **sched, const u_int8_t *key, int len)
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{
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struct chacha_ctx *ctx;
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if (len != CHACHA_MINKEYLEN && len != 32)
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return (EINVAL);
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ctx = malloc(sizeof(*ctx), M_CRYPTO_DATA, M_NOWAIT | M_ZERO);
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*sched = (void *)ctx;
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if (ctx == NULL)
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return (ENOMEM);
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chacha_keysetup(ctx, key, len * 8);
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return (0);
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}
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static void
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chacha20_xform_reinit(caddr_t key, const u_int8_t *iv)
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{
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struct chacha_ctx *ctx;
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ctx = (void *)key;
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chacha_ivsetup(ctx, iv + 8, iv);
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}
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static void
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chacha20_xform_zerokey(u_int8_t **sched)
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{
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struct chacha_ctx *ctx;
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ctx = (void *)*sched;
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explicit_bzero(ctx, sizeof(*ctx));
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free(ctx, M_CRYPTO_DATA);
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*sched = NULL;
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}
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static void
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chacha20_xform_crypt(caddr_t cctx, u_int8_t *bytes)
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{
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struct chacha_ctx *ctx;
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ctx = (void *)cctx;
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chacha_encrypt_bytes(ctx, bytes, bytes, 1);
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}
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static void
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chacha20_xform_crypt_multi(void *vctx, uint8_t *bytes, size_t len)
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{
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struct chacha_ctx *ctx;
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ctx = vctx;
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chacha_encrypt_bytes(ctx, bytes, bytes, len);
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}
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struct enc_xform enc_xform_chacha20 = {
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.type = CRYPTO_CHACHA20,
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.name = "chacha20",
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.blocksize = 1,
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.ivsize = CHACHA_NONCELEN + CHACHA_CTRLEN,
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.minkey = CHACHA_MINKEYLEN,
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.maxkey = 32,
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.encrypt = chacha20_xform_crypt,
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.decrypt = chacha20_xform_crypt,
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.setkey = chacha20_xform_setkey,
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.zerokey = chacha20_xform_zerokey,
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.reinit = chacha20_xform_reinit,
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.encrypt_multi = chacha20_xform_crypt_multi,
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.decrypt_multi = chacha20_xform_crypt_multi,
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};
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