cipher/chacha20: rename chacha20_x to chacha20_common
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@ -60,11 +60,11 @@ chacha20_poly1305_seal(const uint8_t *key, size_t keylen, const uint8_t *iv,
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for (i = 0; i < LC_POLY1305_KEYLEN; i++)
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poly1305_key[i] = 0;
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if (!chacha20_x_init(&cctx, key, keylen, iv, ivlen) ||
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!chacha20_x_update(&cctx, poly1305_key, &olen, poly1305_key,
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if (!chacha20_common_init(&cctx, key, keylen, iv, ivlen) ||
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!chacha20_common_update(&cctx, poly1305_key, &olen, poly1305_key,
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LC_POLY1305_KEYLEN))
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return 0;
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if (!chacha20_x_final(&cctx, poly1305_key + olen, &olen))
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if (!chacha20_common_final(&cctx, poly1305_key + olen, &olen))
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return 0;
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if (!poly1305_init(&pctx, poly1305_key, LC_POLY1305_KEYLEN) ||
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@ -74,12 +74,12 @@ chacha20_poly1305_seal(const uint8_t *key, size_t keylen, const uint8_t *iv,
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if (!poly1305_update(&pctx, zeropad, 16 - (aadlen % 16)))
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return 0;
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if (!chacha20_x_init_from(&cctx, key, keylen, iv, ivlen, 1))
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if (!chacha20_common_init_from(&cctx, key, keylen, iv, ivlen, 1))
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return 0;
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if (!chacha20_x_update(&cctx, out, &olen, in, inlen))
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if (!chacha20_common_update(&cctx, out, &olen, in, inlen))
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return 0;
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*outlen = olen;
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if (!chacha20_x_final(&cctx, out + olen, &olen))
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if (!chacha20_common_final(&cctx, out + olen, &olen))
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return 0;
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if (!poly1305_update(&pctx, out, inlen))
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return 0;
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@ -136,11 +136,11 @@ chacha20_poly1305_open(const uint8_t *key, size_t keylen, const uint8_t *iv,
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for (i = 0; i < LC_POLY1305_KEYLEN; i++)
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poly1305_key[i] = 0;
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if (!chacha20_x_init(&cctx, key, keylen, iv, ivlen) ||
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!chacha20_x_update(&cctx, poly1305_key, &olen, poly1305_key,
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if (!chacha20_common_init(&cctx, key, keylen, iv, ivlen) ||
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!chacha20_common_update(&cctx, poly1305_key, &olen, poly1305_key,
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LC_POLY1305_KEYLEN))
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return 0;
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if (!chacha20_x_final(&cctx, poly1305_key + olen, &olen))
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if (!chacha20_common_final(&cctx, poly1305_key + olen, &olen))
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return 0;
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if (!poly1305_init(&pctx, poly1305_key, LC_POLY1305_KEYLEN) ||
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@ -168,12 +168,12 @@ chacha20_poly1305_open(const uint8_t *key, size_t keylen, const uint8_t *iv,
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lc_scrub(buf, sizeof(buf));
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lc_scrub(poly1305_key, sizeof(poly1305_key));
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if (!chacha20_x_init_from(&cctx, key, keylen, iv, ivlen, 1))
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if (!chacha20_common_init_from(&cctx, key, keylen, iv, ivlen, 1))
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return 0;
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if (!chacha20_x_update(&cctx, out, &olen, in, ctlen))
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if (!chacha20_common_update(&cctx, out, &olen, in, ctlen))
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return 0;
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*outlen = olen;
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if (!chacha20_x_final(&cctx, out + olen, &olen))
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if (!chacha20_common_final(&cctx, out + olen, &olen))
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return 0;
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*outlen += olen;
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@ -26,7 +26,7 @@
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int
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chacha20_x_init_from(void *arg, const uint8_t *key, size_t keylen,
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chacha20_common_init_from(void *arg, const uint8_t *key, size_t keylen,
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const uint8_t *iv, size_t ivlen, uint32_t counter)
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{
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struct chacha20_ctx *ctx = arg;
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@ -48,15 +48,15 @@ chacha20_x_init_from(void *arg, const uint8_t *key, size_t keylen,
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}
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int
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chacha20_x_init(void *arg, const uint8_t *key, size_t keylen,
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chacha20_common_init(void *arg, const uint8_t *key, size_t keylen,
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const uint8_t *iv, size_t ivlen)
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{
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return chacha20_x_init_from(arg, key, keylen, iv, ivlen, 0);
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return chacha20_common_init_from(arg, key, keylen, iv, ivlen, 0);
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}
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int
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chacha20_x_update(void *arg, uint8_t *out, size_t *outlen, const uint8_t *in,
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size_t inlen)
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chacha20_common_update(void *arg, uint8_t *out, size_t *outlen,
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const uint8_t *in, size_t inlen)
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{
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struct chacha20_ctx *ctx = arg;
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size_t i, blocks;
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@ -69,7 +69,7 @@ chacha20_x_update(void *arg, uint8_t *out, size_t *outlen, const uint8_t *in,
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if (blocks + ctx->c > CHACHA20_CTRMAX)
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return 0;
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*outlen = (ctx->mlen + inlen) / CHACHA20_CHUNK * CHACHA20_CHUNK;
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*outlen = ctx->mlen + inlen - ((ctx->mlen + inlen) % CHACHA20_CHUNK);
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if (out == NULL)
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return 1;
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@ -117,7 +117,7 @@ chacha20_x_update(void *arg, uint8_t *out, size_t *outlen, const uint8_t *in,
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}
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int
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chacha20_x_final(void *arg, uint8_t *out, size_t *outlen)
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chacha20_common_final(void *arg, uint8_t *out, size_t *outlen)
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{
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struct chacha20_ctx *ctx = arg;
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size_t i, off;
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@ -150,8 +150,9 @@ chacha20_x_final(void *arg, uint8_t *out, size_t *outlen)
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}
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int
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chacha20_x(const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
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uint8_t *out, size_t *outlen, const uint8_t *in, size_t inlen)
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chacha20_common(const uint8_t *key, size_t keylen, const uint8_t *iv,
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size_t ivlen, uint8_t *out, size_t *outlen, const uint8_t *in,
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size_t inlen)
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{
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struct chacha20_ctx ctx;
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size_t l0, l1;
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@ -168,9 +169,9 @@ chacha20_x(const uint8_t *key, size_t keylen, const uint8_t *iv, size_t ivlen,
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return 1;
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}
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rc = chacha20_x_init(&ctx, key, keylen, iv, ivlen) &&
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chacha20_x_update(&ctx, out, &l0, in, inlen) &
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chacha20_x_final(&ctx, out + l0, &l1);
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rc = chacha20_common_init(&ctx, key, keylen, iv, ivlen) &&
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chacha20_common_update(&ctx, out, &l0, in, inlen) &
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chacha20_common_final(&ctx, out + l0, &l1);
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if (rc)
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*outlen = l0 + l1;
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@ -186,15 +187,15 @@ chacha20_ctx_new(void)
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static struct lc_cipher_impl chacha20_impl = {
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.encrypt_init = &chacha20_x_init,
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.encrypt_update = &chacha20_x_update,
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.encrypt_final = &chacha20_x_final,
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.encrypt = &chacha20_x,
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.encrypt_init = &chacha20_common_init,
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.encrypt_update = &chacha20_common_update,
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.encrypt_final = &chacha20_common_final,
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.encrypt = &chacha20_common,
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.decrypt_init = &chacha20_x_init,
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.decrypt_update = &chacha20_x_update,
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.decrypt_final = &chacha20_x_final,
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.decrypt = &chacha20_x,
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.decrypt_init = &chacha20_common_init,
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.decrypt_update = &chacha20_common_update,
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.decrypt_final = &chacha20_common_final,
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.decrypt = &chacha20_common,
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.ctx_new = &chacha20_ctx_new,
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.ctx_free = NULL,
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@ -18,12 +18,12 @@
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#include <stdint.h>
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int chacha20_x_init_from(void *, const uint8_t *, size_t, const uint8_t *,
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size_t, uint32_t);
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int chacha20_x_init(void *, const uint8_t *, size_t, const uint8_t *,
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int chacha20_common_init_from(void *, const uint8_t *, size_t,
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const uint8_t *, size_t, uint32_t);
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int chacha20_common_init(void *, const uint8_t *, size_t, const uint8_t *,
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size_t);
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int chacha20_x_update(void *, uint8_t *, size_t *, const uint8_t *,
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int chacha20_common_update(void *, uint8_t *, size_t *, const uint8_t *,
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size_t);
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int chacha20_x_final(void *, uint8_t *, size_t *);
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int chacha20_x(const uint8_t *, size_t, const uint8_t *, size_t, uint8_t *,
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size_t *, const uint8_t *, size_t);
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int chacha20_common_final(void *, uint8_t *, size_t *);
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int chacha20_common(const uint8_t *, size_t, const uint8_t *, size_t,
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uint8_t *, size_t *, const uint8_t *, size_t);
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