From 36af124bfb209b49cb92a5fb9fab627d9cd4a44b Mon Sep 17 00:00:00 2001 From: Richard Levitte Date: Sat, 27 Oct 2018 09:15:04 +0200 Subject: [PATCH] crypto/engine/eng_devcrypto.c: add digest copy Copying an EVP_MD_CTX, including the implementation local bits, is a necessary operation. In this case, though, it's the same as initializing the local bits to be "copied to". Fixes #7495 Reviewed-by: Bernd Edlinger (Merged from https://github.com/openssl/openssl/pull/7506) --- crypto/engine/eng_devcrypto.c | 46 +++++++++++++++++++++++++++++------ 1 file changed, 39 insertions(+), 7 deletions(-) diff --git a/crypto/engine/eng_devcrypto.c b/crypto/engine/eng_devcrypto.c index 51105ec60d..4e2c79edab 100644 --- a/crypto/engine/eng_devcrypto.c +++ b/crypto/engine/eng_devcrypto.c @@ -329,11 +329,12 @@ static int devcrypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher, /* * We only support digests if the cryptodev implementation supports multiple - * data updates. Otherwise, we would be forced to maintain a cache, which is - * perilous if there's a lot of data coming in (if someone wants to checksum - * an OpenSSL tarball, for example). + * data updates and session copying. Otherwise, we would be forced to maintain + * a cache, which is perilous if there's a lot of data coming in (if someone + * wants to checksum an OpenSSL tarball, for example). */ -#if defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL) +#if defined(CIOCCPHASH) && defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL) +#define IMPLEMENT_DIGEST /****************************************************************************** * @@ -480,6 +481,36 @@ static int digest_final(EVP_MD_CTX *ctx, unsigned char *md) return 1; } +static int digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from) +{ + struct digest_ctx *digest_from = + (struct digest_ctx *)EVP_MD_CTX_md_data(from); + struct digest_ctx *digest_to = + (struct digest_ctx *)EVP_MD_CTX_md_data(to); + struct cphash_op cphash; + + if (digest_from == NULL) + return 1; + + if (digest_from->init != 1) { + SYSerr(SYS_F_IOCTL, EINVAL); + return 0; + } + + if (!digest_init(to)) { + SYSerr(SYS_F_IOCTL, errno); + return 0; + } + + cphash.src_ses = digest_from->sess.ses; + cphash.dst_ses = digest_to->sess.ses; + if (ioctl(cfd, CIOCCPHASH, &cphash) < 0) { + SYSerr(SYS_F_IOCTL, errno); + return 0; + } + return 1; +} + static int digest_cleanup(EVP_MD_CTX *ctx) { struct digest_ctx *digest_ctx = @@ -532,6 +563,7 @@ static void prepare_digest_methods() || !EVP_MD_meth_set_init(known_digest_methods[i], digest_init) || !EVP_MD_meth_set_update(known_digest_methods[i], digest_update) || !EVP_MD_meth_set_final(known_digest_methods[i], digest_final) + || !EVP_MD_meth_set_copy(known_digest_methods[i], digest_copy) || !EVP_MD_meth_set_cleanup(known_digest_methods[i], digest_cleanup) || !EVP_MD_meth_set_app_datasize(known_digest_methods[i], sizeof(struct digest_ctx))) { @@ -598,7 +630,7 @@ static int devcrypto_digests(ENGINE *e, const EVP_MD **digest, static int devcrypto_unload(ENGINE *e) { destroy_all_cipher_methods(); -#if defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL) +#ifdef IMPLEMENT_DIGEST destroy_all_digest_methods(); #endif return 1; @@ -618,7 +650,7 @@ void engine_load_devcrypto_int() } prepare_cipher_methods(); -#if defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL) +#ifdef IMPLEMENT_DIGEST prepare_digest_methods(); #endif @@ -664,7 +696,7 @@ void engine_load_devcrypto_int() # endif #endif || !ENGINE_set_ciphers(e, devcrypto_ciphers) -#if defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL) +#ifdef IMPLEMENT_DIGEST || !ENGINE_set_digests(e, devcrypto_digests) #endif ) { -- 2.25.1