92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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/* 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 <opencrypto/xform_auth.h>
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#include <opencrypto/xform_poly1305.h>
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#include <sodium/crypto_onetimeauth_poly1305.h>
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struct poly1305_xform_ctx {
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struct crypto_onetimeauth_poly1305_state state;
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};
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CTASSERT(sizeof(union authctx) >= sizeof(struct poly1305_xform_ctx));
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CTASSERT(POLY1305_KEY_LEN == crypto_onetimeauth_poly1305_KEYBYTES);
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CTASSERT(POLY1305_HASH_LEN == crypto_onetimeauth_poly1305_BYTES);
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void
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Poly1305_Init(struct poly1305_xform_ctx *polyctx)
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{
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/* Nop */
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}
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void
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Poly1305_Setkey(struct poly1305_xform_ctx *polyctx,
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const uint8_t key[__min_size(POLY1305_KEY_LEN)], size_t klen)
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{
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int rc;
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if (klen != POLY1305_KEY_LEN)
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panic("%s: Bogus keylen: %u bytes", __func__, (unsigned)klen);
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rc = crypto_onetimeauth_poly1305_init(&polyctx->state, key);
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if (rc != 0)
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panic("%s: Invariant violated: %d", __func__, rc);
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}
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static void
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xform_Poly1305_Setkey(void *ctx, const uint8_t *key, uint16_t klen)
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{
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Poly1305_Setkey(ctx, key, klen);
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}
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int
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Poly1305_Update(struct poly1305_xform_ctx *polyctx, const void *data,
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size_t len)
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{
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int rc;
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rc = crypto_onetimeauth_poly1305_update(&polyctx->state, data, len);
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if (rc != 0)
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panic("%s: Invariant violated: %d", __func__, rc);
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return (0);
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}
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static int
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xform_Poly1305_Update(void *ctx, const uint8_t *data, uint16_t len)
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{
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return (Poly1305_Update(ctx, data, len));
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}
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void
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Poly1305_Final(uint8_t digest[__min_size(POLY1305_HASH_LEN)],
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struct poly1305_xform_ctx *polyctx)
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{
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int rc;
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rc = crypto_onetimeauth_poly1305_final(&polyctx->state, digest);
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if (rc != 0)
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panic("%s: Invariant violated: %d", __func__, rc);
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}
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static void
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xform_Poly1305_Final(uint8_t *digest, void *ctx)
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{
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Poly1305_Final(digest, ctx);
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}
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struct auth_hash auth_hash_poly1305 = {
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.type = CRYPTO_POLY1305,
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.name = "Poly-1305",
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.keysize = POLY1305_KEY_LEN,
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.hashsize = POLY1305_HASH_LEN,
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.ctxsize = sizeof(struct poly1305_xform_ctx),
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.blocksize = crypto_onetimeauth_poly1305_BYTES,
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.Init = (void *)Poly1305_Init,
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.Setkey = xform_Poly1305_Setkey,
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.Update = xform_Poly1305_Update,
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.Final = xform_Poly1305_Final,
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};
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