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116 lines
4.0 KiB
Diff
116 lines
4.0 KiB
Diff
From 82b269fd77d20aa86d0825d798f3045dfe0a7a86 Mon Sep 17 00:00:00 2001
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From: Eneas U de Queiroz <cote2004-github@yahoo.com>
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Date: Tue, 12 Feb 2019 10:44:19 -0200
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Subject: [PATCH] eng_devcrypto: close open session on init
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cipher_init may be called on an already initialized context, without a
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necessary cleanup. This separates cleanup from initialization, closing
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an eventual open session before creating a new one.
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Move the /dev/crypto session cleanup code to its own function.
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Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>
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--- a/crypto/engine/eng_devcrypto.c
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+++ b/crypto/engine/eng_devcrypto.c
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@@ -35,6 +35,15 @@
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*/
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static int cfd;
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+static int clean_devcrypto_session(struct session_op *sess) {
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+ if (ioctl(cfd, CIOCFSESSION, &sess->ses) < 0) {
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+ SYSerr(SYS_F_IOCTL, errno);
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+ return 0;
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+ }
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+ memset(sess, 0, sizeof(struct session_op));
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+ return 1;
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+}
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+
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/******************************************************************************
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*
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* Ciphers
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@@ -143,7 +152,11 @@ static int cipher_init(EVP_CIPHER_CTX *c
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const struct cipher_data_st *cipher_d =
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get_cipher_data(EVP_CIPHER_CTX_nid(ctx));
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- memset(&cipher_ctx->sess, 0, sizeof(cipher_ctx->sess));
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+ /* cleanup a previous session */
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+ if (cipher_ctx->sess.ses != 0 &&
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+ clean_devcrypto_session(&cipher_ctx->sess) == 0)
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+ return 0;
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+
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cipher_ctx->sess.cipher = cipher_d->devcryptoid;
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cipher_ctx->sess.keylen = cipher_d->keylen;
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cipher_ctx->sess.key = (void *)key;
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@@ -282,15 +295,29 @@ static int ctr_do_cipher(EVP_CIPHER_CTX
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static int cipher_ctrl(EVP_CIPHER_CTX *ctx, int type, int p1, void* p2)
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{
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+ struct cipher_ctx *cipher_ctx =
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+ (struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
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EVP_CIPHER_CTX *to_ctx = (EVP_CIPHER_CTX *)p2;
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- struct cipher_ctx *cipher_ctx;
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+ struct cipher_ctx *to_cipher_ctx;
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+
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+ switch (type) {
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- if (type == EVP_CTRL_COPY) {
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+ case EVP_CTRL_COPY:
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+ if (cipher_ctx == NULL)
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+ return 1;
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/* when copying the context, a new session needs to be initialized */
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- cipher_ctx = (struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
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- return (cipher_ctx == NULL)
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- || cipher_init(to_ctx, cipher_ctx->sess.key, EVP_CIPHER_CTX_iv(ctx),
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+ to_cipher_ctx =
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+ (struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(to_ctx);
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+ memset(&to_cipher_ctx->sess, 0, sizeof(to_cipher_ctx->sess));
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+ return cipher_init(to_ctx, cipher_ctx->sess.key, EVP_CIPHER_CTX_iv(ctx),
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(cipher_ctx->op == COP_ENCRYPT));
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+
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+ case EVP_CTRL_INIT:
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+ memset(&cipher_ctx->sess, 0, sizeof(cipher_ctx->sess));
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+ return 1;
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+
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+ default:
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+ break;
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}
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return -1;
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@@ -301,12 +328,7 @@ static int cipher_cleanup(EVP_CIPHER_CTX
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struct cipher_ctx *cipher_ctx =
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(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
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- if (ioctl(cfd, CIOCFSESSION, &cipher_ctx->sess.ses) < 0) {
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- SYSerr(SYS_F_IOCTL, errno);
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- return 0;
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- }
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-
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- return 1;
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+ return clean_devcrypto_session(&cipher_ctx->sess);
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}
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/*
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@@ -352,6 +374,7 @@ static void prepare_cipher_methods(void)
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|| !EVP_CIPHER_meth_set_flags(known_cipher_methods[i],
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cipher_data[i].flags
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| EVP_CIPH_CUSTOM_COPY
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+ | EVP_CIPH_CTRL_INIT
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| EVP_CIPH_FLAG_DEFAULT_ASN1)
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|| !EVP_CIPHER_meth_set_init(known_cipher_methods[i], cipher_init)
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|| !EVP_CIPHER_meth_set_do_cipher(known_cipher_methods[i],
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@@ -594,11 +617,8 @@ static int digest_cleanup(EVP_MD_CTX *ct
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if (digest_ctx == NULL)
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return 1;
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- if (ioctl(cfd, CIOCFSESSION, &digest_ctx->sess.ses) < 0) {
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- SYSerr(SYS_F_IOCTL, errno);
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- return 0;
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- }
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- return 1;
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+
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+ return clean_devcrypto_session(&digest_ctx->sess);
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}
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static int devcrypto_test_digest(size_t digest_data_index)
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