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-rw-r--r--crypto/cmac/cm_ameth.c61
-rw-r--r--crypto/cmac/cm_pmeth.c292
-rw-r--r--crypto/cmac/cmac.c424
-rw-r--r--crypto/cmac/cmac.h14
4 files changed, 385 insertions, 406 deletions
diff --git a/crypto/cmac/cm_ameth.c b/crypto/cmac/cm_ameth.c
index 0b8e5670b0ec..bf933e0866d2 100644
--- a/crypto/cmac/cm_ameth.c
+++ b/crypto/cmac/cm_ameth.c
@@ -1,5 +1,6 @@
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2010.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2010.
*/
/* ====================================================================
* Copyright (c) 2010 The OpenSSL Project. All rights reserved.
@@ -9,7 +10,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -56,42 +57,40 @@
#include <openssl/cmac.h>
#include "asn1_locl.h"
-/* CMAC "ASN1" method. This is just here to indicate the
- * maximum CMAC output length and to free up a CMAC
- * key.
+/*
+ * CMAC "ASN1" method. This is just here to indicate the maximum CMAC output
+ * length and to free up a CMAC key.
*/
static int cmac_size(const EVP_PKEY *pkey)
- {
- return EVP_MAX_BLOCK_LENGTH;
- }
+{
+ return EVP_MAX_BLOCK_LENGTH;
+}
static void cmac_key_free(EVP_PKEY *pkey)
- {
- CMAC_CTX *cmctx = (CMAC_CTX *)pkey->pkey.ptr;
- if (cmctx)
- CMAC_CTX_free(cmctx);
- }
+{
+ CMAC_CTX *cmctx = (CMAC_CTX *)pkey->pkey.ptr;
+ if (cmctx)
+ CMAC_CTX_free(cmctx);
+}
-const EVP_PKEY_ASN1_METHOD cmac_asn1_meth =
- {
- EVP_PKEY_CMAC,
- EVP_PKEY_CMAC,
- 0,
+const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = {
+ EVP_PKEY_CMAC,
+ EVP_PKEY_CMAC,
+ 0,
- "CMAC",
- "OpenSSL CMAC method",
+ "CMAC",
+ "OpenSSL CMAC method",
- 0,0,0,0,
+ 0, 0, 0, 0,
- 0,0,0,
+ 0, 0, 0,
- cmac_size,
- 0,
- 0,0,0,0,0,0,0,
-
- cmac_key_free,
- 0,
- 0,0
- };
+ cmac_size,
+ 0,
+ 0, 0, 0, 0, 0, 0, 0,
+ cmac_key_free,
+ 0,
+ 0, 0
+};
diff --git a/crypto/cmac/cm_pmeth.c b/crypto/cmac/cm_pmeth.c
index 072228ec7fa4..a2300df18735 100644
--- a/crypto/cmac/cm_pmeth.c
+++ b/crypto/cmac/cm_pmeth.c
@@ -1,5 +1,6 @@
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2010.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2010.
*/
/* ====================================================================
* Copyright (c) 2010 The OpenSSL Project. All rights reserved.
@@ -9,7 +10,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -61,164 +62,155 @@
/* The context structure and "key" is simply a CMAC_CTX */
static int pkey_cmac_init(EVP_PKEY_CTX *ctx)
- {
- ctx->data = CMAC_CTX_new();
- if (!ctx->data)
- return 0;
- ctx->keygen_info_count = 0;
- return 1;
- }
+{
+ ctx->data = CMAC_CTX_new();
+ if (!ctx->data)
+ return 0;
+ ctx->keygen_info_count = 0;
+ return 1;
+}
static int pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
- {
- if (!pkey_cmac_init(dst))
- return 0;
- if (!CMAC_CTX_copy(dst->data, src->data))
- return 0;
- return 1;
- }
+{
+ if (!pkey_cmac_init(dst))
+ return 0;
+ if (!CMAC_CTX_copy(dst->data, src->data))
+ return 0;
+ return 1;
+}
static void pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
- {
- CMAC_CTX_free(ctx->data);
- }
+{
+ CMAC_CTX_free(ctx->data);
+}
static int pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
- {
- CMAC_CTX *cmkey = CMAC_CTX_new();
- CMAC_CTX *cmctx = ctx->data;
- if (!cmkey)
- return 0;
- if (!CMAC_CTX_copy(cmkey, cmctx))
- {
- CMAC_CTX_free(cmkey);
- return 0;
- }
- EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
-
- return 1;
- }
-
-static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count)
- {
- if (!CMAC_Update(ctx->pctx->data, data, count))
- return 0;
- return 1;
- }
+{
+ CMAC_CTX *cmkey = CMAC_CTX_new();
+ CMAC_CTX *cmctx = ctx->data;
+ if (!cmkey)
+ return 0;
+ if (!CMAC_CTX_copy(cmkey, cmctx)) {
+ CMAC_CTX_free(cmkey);
+ return 0;
+ }
+ EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
+
+ return 1;
+}
+
+static int int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+ if (!CMAC_Update(ctx->pctx->data, data, count))
+ return 0;
+ return 1;
+}
static int cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
- {
- EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
- mctx->update = int_update;
- return 1;
- }
+{
+ EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
+ mctx->update = int_update;
+ return 1;
+}
static int cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
- EVP_MD_CTX *mctx)
- {
- return CMAC_Final(ctx->data, sig, siglen);
- }
+ EVP_MD_CTX *mctx)
+{
+ return CMAC_Final(ctx->data, sig, siglen);
+}
static int pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
- {
- CMAC_CTX *cmctx = ctx->data;
- switch (type)
- {
-
- case EVP_PKEY_CTRL_SET_MAC_KEY:
- if (!p2 || p1 < 0)
- return 0;
- if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
- return 0;
- break;
-
- case EVP_PKEY_CTRL_CIPHER:
- if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
- return 0;
- break;
-
- case EVP_PKEY_CTRL_MD:
- if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
- (CMAC_CTX *)ctx->pkey->pkey.ptr))
- return 0;
- if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
- return 0;
- break;
-
- default:
- return -2;
-
- }
- return 1;
- }
+{
+ CMAC_CTX *cmctx = ctx->data;
+ switch (type) {
+
+ case EVP_PKEY_CTRL_SET_MAC_KEY:
+ if (!p2 || p1 < 0)
+ return 0;
+ if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
+ return 0;
+ break;
+
+ case EVP_PKEY_CTRL_CIPHER:
+ if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
+ return 0;
+ break;
+
+ case EVP_PKEY_CTRL_MD:
+ if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
+ (CMAC_CTX *)ctx->pkey->pkey.ptr))
+ return 0;
+ if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
+ return 0;
+ break;
+
+ default:
+ return -2;
+
+ }
+ return 1;
+}
static int pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx,
- const char *type, const char *value)
- {
- if (!value)
- {
- return 0;
- }
- if (!strcmp(type, "key"))
- {
- void *p = (void *)value;
- return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
- strlen(p), p);
- }
- if (!strcmp(type, "cipher"))
- {
- const EVP_CIPHER *c;
- c = EVP_get_cipherbyname(value);
- if (!c)
- return 0;
- return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
- }
- if (!strcmp(type, "hexkey"))
- {
- unsigned char *key;
- int r;
- long keylen;
- key = string_to_hex(value, &keylen);
- if (!key)
- return 0;
- r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
- OPENSSL_free(key);
- return r;
- }
- return -2;
- }
-
-const EVP_PKEY_METHOD cmac_pkey_meth =
- {
- EVP_PKEY_CMAC,
- EVP_PKEY_FLAG_SIGCTX_CUSTOM,
- pkey_cmac_init,
- pkey_cmac_copy,
- pkey_cmac_cleanup,
-
- 0, 0,
-
- 0,
- pkey_cmac_keygen,
-
- 0, 0,
-
- 0, 0,
-
- 0,0,
-
- cmac_signctx_init,
- cmac_signctx,
-
- 0,0,
-
- 0,0,
-
- 0,0,
-
- 0,0,
-
- pkey_cmac_ctrl,
- pkey_cmac_ctrl_str
-
- };
+ const char *type, const char *value)
+{
+ if (!value) {
+ return 0;
+ }
+ if (!strcmp(type, "key")) {
+ void *p = (void *)value;
+ return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, strlen(p), p);
+ }
+ if (!strcmp(type, "cipher")) {
+ const EVP_CIPHER *c;
+ c = EVP_get_cipherbyname(value);
+ if (!c)
+ return 0;
+ return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
+ }
+ if (!strcmp(type, "hexkey")) {
+ unsigned char *key;
+ int r;
+ long keylen;
+ key = string_to_hex(value, &keylen);
+ if (!key)
+ return 0;
+ r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
+ OPENSSL_free(key);
+ return r;
+ }
+ return -2;
+}
+
+const EVP_PKEY_METHOD cmac_pkey_meth = {
+ EVP_PKEY_CMAC,
+ EVP_PKEY_FLAG_SIGCTX_CUSTOM,
+ pkey_cmac_init,
+ pkey_cmac_copy,
+ pkey_cmac_cleanup,
+
+ 0, 0,
+
+ 0,
+ pkey_cmac_keygen,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ cmac_signctx_init,
+ cmac_signctx,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ pkey_cmac_ctrl,
+ pkey_cmac_ctrl_str
+};
diff --git a/crypto/cmac/cmac.c b/crypto/cmac/cmac.c
index 8b72b096813c..c5597a3f73b9 100644
--- a/crypto/cmac/cmac.c
+++ b/crypto/cmac/cmac.c
@@ -1,5 +1,6 @@
/* crypto/cmac/cmac.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
@@ -10,7 +11,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -58,251 +59,238 @@
#include <openssl/cmac.h>
#ifdef OPENSSL_FIPS
-#include <openssl/fips.h>
+# include <openssl/fips.h>
#endif
-struct CMAC_CTX_st
- {
- /* Cipher context to use */
- EVP_CIPHER_CTX cctx;
- /* Keys k1 and k2 */
- unsigned char k1[EVP_MAX_BLOCK_LENGTH];
- unsigned char k2[EVP_MAX_BLOCK_LENGTH];
- /* Temporary block */
- unsigned char tbl[EVP_MAX_BLOCK_LENGTH];
- /* Last (possibly partial) block */
- unsigned char last_block[EVP_MAX_BLOCK_LENGTH];
- /* Number of bytes in last block: -1 means context not initialised */
- int nlast_block;
- };
-
+struct CMAC_CTX_st {
+ /* Cipher context to use */
+ EVP_CIPHER_CTX cctx;
+ /* Keys k1 and k2 */
+ unsigned char k1[EVP_MAX_BLOCK_LENGTH];
+ unsigned char k2[EVP_MAX_BLOCK_LENGTH];
+ /* Temporary block */
+ unsigned char tbl[EVP_MAX_BLOCK_LENGTH];
+ /* Last (possibly partial) block */
+ unsigned char last_block[EVP_MAX_BLOCK_LENGTH];
+ /* Number of bytes in last block: -1 means context not initialised */
+ int nlast_block;
+};
/* Make temporary keys K1 and K2 */
static void make_kn(unsigned char *k1, unsigned char *l, int bl)
- {
- int i;
- /* Shift block to left, including carry */
- for (i = 0; i < bl; i++)
- {
- k1[i] = l[i] << 1;
- if (i < bl - 1 && l[i + 1] & 0x80)
- k1[i] |= 1;
- }
- /* If MSB set fixup with R */
- if (l[0] & 0x80)
- k1[bl - 1] ^= bl == 16 ? 0x87 : 0x1b;
- }
+{
+ int i;
+ /* Shift block to left, including carry */
+ for (i = 0; i < bl; i++) {
+ k1[i] = l[i] << 1;
+ if (i < bl - 1 && l[i + 1] & 0x80)
+ k1[i] |= 1;
+ }
+ /* If MSB set fixup with R */
+ if (l[0] & 0x80)
+ k1[bl - 1] ^= bl == 16 ? 0x87 : 0x1b;
+}
CMAC_CTX *CMAC_CTX_new(void)
- {
- CMAC_CTX *ctx;
- ctx = OPENSSL_malloc(sizeof(CMAC_CTX));
- if (!ctx)
- return NULL;
- EVP_CIPHER_CTX_init(&ctx->cctx);
- ctx->nlast_block = -1;
- return ctx;
- }
+{
+ CMAC_CTX *ctx;
+ ctx = OPENSSL_malloc(sizeof(CMAC_CTX));
+ if (!ctx)
+ return NULL;
+ EVP_CIPHER_CTX_init(&ctx->cctx);
+ ctx->nlast_block = -1;
+ return ctx;
+}
void CMAC_CTX_cleanup(CMAC_CTX *ctx)
- {
+{
#ifdef OPENSSL_FIPS
- if (FIPS_mode() && !ctx->cctx.engine)
- {
- FIPS_cmac_ctx_cleanup(ctx);
- return;
- }
+ if (FIPS_mode() && !ctx->cctx.engine) {
+ FIPS_cmac_ctx_cleanup(ctx);
+ return;
+ }
#endif
- EVP_CIPHER_CTX_cleanup(&ctx->cctx);
- OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH);
- OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH);
- OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH);
- OPENSSL_cleanse(ctx->last_block, EVP_MAX_BLOCK_LENGTH);
- ctx->nlast_block = -1;
- }
+ EVP_CIPHER_CTX_cleanup(&ctx->cctx);
+ OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH);
+ OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH);
+ OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH);
+ OPENSSL_cleanse(ctx->last_block, EVP_MAX_BLOCK_LENGTH);
+ ctx->nlast_block = -1;
+}
EVP_CIPHER_CTX *CMAC_CTX_get0_cipher_ctx(CMAC_CTX *ctx)
- {
- return &ctx->cctx;
- }
+{
+ return &ctx->cctx;
+}
void CMAC_CTX_free(CMAC_CTX *ctx)
- {
- CMAC_CTX_cleanup(ctx);
- OPENSSL_free(ctx);
- }
+{
+ CMAC_CTX_cleanup(ctx);
+ OPENSSL_free(ctx);
+}
int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in)
- {
- int bl;
- if (in->nlast_block == -1)
- return 0;
- if (!EVP_CIPHER_CTX_copy(&out->cctx, &in->cctx))
- return 0;
- bl = EVP_CIPHER_CTX_block_size(&in->cctx);
- memcpy(out->k1, in->k1, bl);
- memcpy(out->k2, in->k2, bl);
- memcpy(out->tbl, in->tbl, bl);
- memcpy(out->last_block, in->last_block, bl);
- out->nlast_block = in->nlast_block;
- return 1;
- }
+{
+ int bl;
+ if (in->nlast_block == -1)
+ return 0;
+ if (!EVP_CIPHER_CTX_copy(&out->cctx, &in->cctx))
+ return 0;
+ bl = EVP_CIPHER_CTX_block_size(&in->cctx);
+ memcpy(out->k1, in->k1, bl);
+ memcpy(out->k2, in->k2, bl);
+ memcpy(out->tbl, in->tbl, bl);
+ memcpy(out->last_block, in->last_block, bl);
+ out->nlast_block = in->nlast_block;
+ return 1;
+}
-int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
- const EVP_CIPHER *cipher, ENGINE *impl)
- {
- static unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH];
+int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
+ const EVP_CIPHER *cipher, ENGINE *impl)
+{
+ static unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH];
#ifdef OPENSSL_FIPS
- if (FIPS_mode())
- {
- /* If we have an ENGINE need to allow non FIPS */
- if ((impl || ctx->cctx.engine)
- && !(ctx->cctx.flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
-
- {
- EVPerr(EVP_F_CMAC_INIT, EVP_R_DISABLED_FOR_FIPS);
- return 0;
- }
- /* Other algorithm blocking will be done in FIPS_cmac_init,
- * via FIPS_cipherinit().
- */
- if (!impl && !ctx->cctx.engine)
- return FIPS_cmac_init(ctx, key, keylen, cipher, NULL);
- }
+ if (FIPS_mode()) {
+ /* If we have an ENGINE need to allow non FIPS */
+ if ((impl || ctx->cctx.engine)
+ && !(ctx->cctx.flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)) {
+ EVPerr(EVP_F_CMAC_INIT, EVP_R_DISABLED_FOR_FIPS);
+ return 0;
+ }
+ /*
+ * Other algorithm blocking will be done in FIPS_cmac_init, via
+ * FIPS_cipherinit().
+ */
+ if (!impl && !ctx->cctx.engine)
+ return FIPS_cmac_init(ctx, key, keylen, cipher, NULL);
+ }
#endif
- /* All zeros means restart */
- if (!key && !cipher && !impl && keylen == 0)
- {
- /* Not initialised */
- if (ctx->nlast_block == -1)
- return 0;
- if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv))
- return 0;
- memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(&ctx->cctx));
- ctx->nlast_block = 0;
- return 1;
- }
- /* Initialiase context */
- if (cipher && !EVP_EncryptInit_ex(&ctx->cctx, cipher, impl, NULL, NULL))
- return 0;
- /* Non-NULL key means initialisation complete */
- if (key)
- {
- int bl;
- if (!EVP_CIPHER_CTX_cipher(&ctx->cctx))
- return 0;
- if (!EVP_CIPHER_CTX_set_key_length(&ctx->cctx, keylen))
- return 0;
- if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, key, zero_iv))
- return 0;
- bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
- if (!EVP_Cipher(&ctx->cctx, ctx->tbl, zero_iv, bl))
- return 0;
- make_kn(ctx->k1, ctx->tbl, bl);
- make_kn(ctx->k2, ctx->k1, bl);
- OPENSSL_cleanse(ctx->tbl, bl);
- /* Reset context again ready for first data block */
- if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv))
- return 0;
- /* Zero tbl so resume works */
- memset(ctx->tbl, 0, bl);
- ctx->nlast_block = 0;
- }
- return 1;
- }
+ /* All zeros means restart */
+ if (!key && !cipher && !impl && keylen == 0) {
+ /* Not initialised */
+ if (ctx->nlast_block == -1)
+ return 0;
+ if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv))
+ return 0;
+ memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(&ctx->cctx));
+ ctx->nlast_block = 0;
+ return 1;
+ }
+ /* Initialiase context */
+ if (cipher && !EVP_EncryptInit_ex(&ctx->cctx, cipher, impl, NULL, NULL))
+ return 0;
+ /* Non-NULL key means initialisation complete */
+ if (key) {
+ int bl;
+ if (!EVP_CIPHER_CTX_cipher(&ctx->cctx))
+ return 0;
+ if (!EVP_CIPHER_CTX_set_key_length(&ctx->cctx, keylen))
+ return 0;
+ if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, key, zero_iv))
+ return 0;
+ bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
+ if (!EVP_Cipher(&ctx->cctx, ctx->tbl, zero_iv, bl))
+ return 0;
+ make_kn(ctx->k1, ctx->tbl, bl);
+ make_kn(ctx->k2, ctx->k1, bl);
+ OPENSSL_cleanse(ctx->tbl, bl);
+ /* Reset context again ready for first data block */
+ if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv))
+ return 0;
+ /* Zero tbl so resume works */
+ memset(ctx->tbl, 0, bl);
+ ctx->nlast_block = 0;
+ }
+ return 1;
+}
int CMAC_Update(CMAC_CTX *ctx, const void *in, size_t dlen)
- {
- const unsigned char *data = in;
- size_t bl;
+{
+ const unsigned char *data = in;
+ size_t bl;
#ifdef OPENSSL_FIPS
- if (FIPS_mode() && !ctx->cctx.engine)
- return FIPS_cmac_update(ctx, in, dlen);
+ if (FIPS_mode() && !ctx->cctx.engine)
+ return FIPS_cmac_update(ctx, in, dlen);
#endif
- if (ctx->nlast_block == -1)
- return 0;
- if (dlen == 0)
- return 1;
- bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
- /* Copy into partial block if we need to */
- if (ctx->nlast_block > 0)
- {
- size_t nleft;
- nleft = bl - ctx->nlast_block;
- if (dlen < nleft)
- nleft = dlen;
- memcpy(ctx->last_block + ctx->nlast_block, data, nleft);
- dlen -= nleft;
- ctx->nlast_block += nleft;
- /* If no more to process return */
- if (dlen == 0)
- return 1;
- data += nleft;
- /* Else not final block so encrypt it */
- if (!EVP_Cipher(&ctx->cctx, ctx->tbl, ctx->last_block,bl))
- return 0;
- }
- /* Encrypt all but one of the complete blocks left */
- while(dlen > bl)
- {
- if (!EVP_Cipher(&ctx->cctx, ctx->tbl, data, bl))
- return 0;
- dlen -= bl;
- data += bl;
- }
- /* Copy any data left to last block buffer */
- memcpy(ctx->last_block, data, dlen);
- ctx->nlast_block = dlen;
- return 1;
+ if (ctx->nlast_block == -1)
+ return 0;
+ if (dlen == 0)
+ return 1;
+ bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
+ /* Copy into partial block if we need to */
+ if (ctx->nlast_block > 0) {
+ size_t nleft;
+ nleft = bl - ctx->nlast_block;
+ if (dlen < nleft)
+ nleft = dlen;
+ memcpy(ctx->last_block + ctx->nlast_block, data, nleft);
+ dlen -= nleft;
+ ctx->nlast_block += nleft;
+ /* If no more to process return */
+ if (dlen == 0)
+ return 1;
+ data += nleft;
+ /* Else not final block so encrypt it */
+ if (!EVP_Cipher(&ctx->cctx, ctx->tbl, ctx->last_block, bl))
+ return 0;
+ }
+ /* Encrypt all but one of the complete blocks left */
+ while (dlen > bl) {
+ if (!EVP_Cipher(&ctx->cctx, ctx->tbl, data, bl))
+ return 0;
+ dlen -= bl;
+ data += bl;
+ }
+ /* Copy any data left to last block buffer */
+ memcpy(ctx->last_block, data, dlen);
+ ctx->nlast_block = dlen;
+ return 1;
- }
+}
int CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen)
- {
- int i, bl, lb;
+{
+ int i, bl, lb;
#ifdef OPENSSL_FIPS
- if (FIPS_mode() && !ctx->cctx.engine)
- return FIPS_cmac_final(ctx, out, poutlen);
+ if (FIPS_mode() && !ctx->cctx.engine)
+ return FIPS_cmac_final(ctx, out, poutlen);
#endif
- if (ctx->nlast_block == -1)
- return 0;
- bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
- *poutlen = (size_t)bl;
- if (!out)
- return 1;
- lb = ctx->nlast_block;
- /* Is last block complete? */
- if (lb == bl)
- {
- for (i = 0; i < bl; i++)
- out[i] = ctx->last_block[i] ^ ctx->k1[i];
- }
- else
- {
- ctx->last_block[lb] = 0x80;
- if (bl - lb > 1)
- memset(ctx->last_block + lb + 1, 0, bl - lb - 1);
- for (i = 0; i < bl; i++)
- out[i] = ctx->last_block[i] ^ ctx->k2[i];
- }
- if (!EVP_Cipher(&ctx->cctx, out, out, bl))
- {
- OPENSSL_cleanse(out, bl);
- return 0;
- }
- return 1;
- }
+ if (ctx->nlast_block == -1)
+ return 0;
+ bl = EVP_CIPHER_CTX_block_size(&ctx->cctx);
+ *poutlen = (size_t)bl;
+ if (!out)
+ return 1;
+ lb = ctx->nlast_block;
+ /* Is last block complete? */
+ if (lb == bl) {
+ for (i = 0; i < bl; i++)
+ out[i] = ctx->last_block[i] ^ ctx->k1[i];
+ } else {
+ ctx->last_block[lb] = 0x80;
+ if (bl - lb > 1)
+ memset(ctx->last_block + lb + 1, 0, bl - lb - 1);
+ for (i = 0; i < bl; i++)
+ out[i] = ctx->last_block[i] ^ ctx->k2[i];
+ }
+ if (!EVP_Cipher(&ctx->cctx, out, out, bl)) {
+ OPENSSL_cleanse(out, bl);
+ return 0;
+ }
+ return 1;
+}
int CMAC_resume(CMAC_CTX *ctx)
- {
- if (ctx->nlast_block == -1)
- return 0;
- /* The buffer "tbl" containes the last fully encrypted block
- * which is the last IV (or all zeroes if no last encrypted block).
- * The last block has not been modified since CMAC_final().
- * So reinitliasing using the last decrypted block will allow
- * CMAC to continue after calling CMAC_Final().
- */
- return EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, ctx->tbl);
- }
+{
+ if (ctx->nlast_block == -1)
+ return 0;
+ /*
+ * The buffer "tbl" containes the last fully encrypted block which is the
+ * last IV (or all zeroes if no last encrypted block). The last block has
+ * not been modified since CMAC_final(). So reinitliasing using the last
+ * decrypted block will allow CMAC to continue after calling
+ * CMAC_Final().
+ */
+ return EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, ctx->tbl);
+}
diff --git a/crypto/cmac/cmac.h b/crypto/cmac/cmac.h
index 712e92dced2c..175be8348abb 100644
--- a/crypto/cmac/cmac.h
+++ b/crypto/cmac/cmac.h
@@ -1,5 +1,6 @@
/* crypto/cmac/cmac.h */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
@@ -10,7 +11,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -51,15 +52,14 @@
* ====================================================================
*/
-
#ifndef HEADER_CMAC_H
-#define HEADER_CMAC_H
+# define HEADER_CMAC_H
#ifdef __cplusplus
extern "C" {
#endif
-#include <openssl/evp.h>
+# include <openssl/evp.h>
/* Opaque */
typedef struct CMAC_CTX_st CMAC_CTX;
@@ -70,8 +70,8 @@ void CMAC_CTX_free(CMAC_CTX *ctx);
EVP_CIPHER_CTX *CMAC_CTX_get0_cipher_ctx(CMAC_CTX *ctx);
int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in);
-int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
- const EVP_CIPHER *cipher, ENGINE *impl);
+int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
+ const EVP_CIPHER *cipher, ENGINE *impl);
int CMAC_Update(CMAC_CTX *ctx, const void *data, size_t dlen);
int CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen);
int CMAC_resume(CMAC_CTX *ctx);