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68a51d59a2
The idea to have all these things in providers/common was viable as long as the implementations was spread around their main providers. This is, however, no longer the case, so we move the common blocks closer to the source that use them. Reviewed-by: Paul Dale <paul.dale@oracle.com> (Merged from https://github.com/openssl/openssl/pull/10564)
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "prov/ciphercommon.h"
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#include "prov/ciphercommon_ccm.h"
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int ccm_generic_setiv(PROV_CCM_CTX *ctx, const unsigned char *nonce,
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size_t nlen, size_t mlen)
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{
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return CRYPTO_ccm128_setiv(&ctx->ccm_ctx, nonce, nlen, mlen) == 0;
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}
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int ccm_generic_setaad(PROV_CCM_CTX *ctx, const unsigned char *aad, size_t alen)
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{
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CRYPTO_ccm128_aad(&ctx->ccm_ctx, aad, alen);
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return 1;
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}
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int ccm_generic_gettag(PROV_CCM_CTX *ctx, unsigned char *tag, size_t tlen)
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{
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return CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, tlen) > 0;
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}
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int ccm_generic_auth_encrypt(PROV_CCM_CTX *ctx, const unsigned char *in,
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unsigned char *out, size_t len,
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unsigned char *tag, size_t taglen)
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{
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int rv;
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if (ctx->str != NULL)
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rv = CRYPTO_ccm128_encrypt_ccm64(&ctx->ccm_ctx, in,
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out, len, ctx->str) == 0;
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else
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rv = CRYPTO_ccm128_encrypt(&ctx->ccm_ctx, in, out, len) == 0;
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if (rv == 1 && tag != NULL)
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rv = (CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, taglen) > 0);
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return rv;
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}
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int ccm_generic_auth_decrypt(PROV_CCM_CTX *ctx, const unsigned char *in,
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unsigned char *out, size_t len,
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unsigned char *expected_tag, size_t taglen)
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{
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int rv = 0;
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if (ctx->str != NULL)
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rv = CRYPTO_ccm128_decrypt_ccm64(&ctx->ccm_ctx, in, out, len,
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ctx->str) == 0;
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else
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rv = CRYPTO_ccm128_decrypt(&ctx->ccm_ctx, in, out, len) == 0;
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if (rv) {
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unsigned char tag[16];
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if (!CRYPTO_ccm128_tag(&ctx->ccm_ctx, tag, taglen)
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|| CRYPTO_memcmp(tag, expected_tag, taglen) != 0)
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rv = 0;
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}
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if (rv == 0)
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OPENSSL_cleanse(out, len);
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return rv;
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}
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