From 0f113f3ee4d629ef9a4a30911b22b224772085e5 Mon Sep 17 00:00:00 2001 From: Matt Caswell Date: Thu, 22 Jan 2015 03:40:55 +0000 Subject: Run util/openssl-format-source -v -c . Reviewed-by: Tim Hudson --- crypto/cmac/cm_ameth.c | 61 ++++---- crypto/cmac/cm_pmeth.c | 292 +++++++++++++++++++------------------- crypto/cmac/cmac.c | 370 ++++++++++++++++++++++++------------------------- crypto/cmac/cmac.h | 14 +- 4 files changed, 359 insertions(+), 378 deletions(-) (limited to 'crypto/cmac') diff --git a/crypto/cmac/cm_ameth.c b/crypto/cmac/cm_ameth.c index 455c5602d9..0b6850ed1b 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 #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, - 0,0,0,0,0,0,0, - - cmac_key_free, - 0, - 0,0 - }; + cmac_size, + 0, 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 072228ec7f..a2300df187 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 394777faef..19018480f2 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 @@ -51,221 +52,210 @@ * ==================================================================== */ - - #include #include #include #include "cryptlib.h" #include -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, const unsigned char *l, int bl) - { - int i; - unsigned char c = l[0], carry = c>>7, cnext; +{ + int i; + unsigned char c = l[0], carry = c >> 7, cnext; - /* Shift block to left, including carry */ - for (i = 0; i < bl-1; i++, c = cnext) - k1[i] = (c << 1) | ((cnext=l[i+1]) >> 7); + /* Shift block to left, including carry */ + for (i = 0; i < bl - 1; i++, c = cnext) + k1[i] = (c << 1) | ((cnext = l[i + 1]) >> 7); - /* If MSB set fixup with R */ - k1[i] = (c << 1) ^ ((0-carry)&(bl==16?0x87:0x1b)); - } + /* If MSB set fixup with R */ + k1[i] = (c << 1) ^ ((0 - carry) & (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) - { - 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 = M_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 = M_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 const unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH] = {0}; - /* All zeros means restart */ - if (!key && !cipher && !impl && keylen == 0) - { - /* Not initialised */ - if (ctx->nlast_block == -1) - return 0; - if (!M_EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv)) - return 0; - memset(ctx->tbl, 0, M_EVP_CIPHER_CTX_block_size(&ctx->cctx)); - ctx->nlast_block = 0; - return 1; - } - /* Initialiase context */ - if (cipher && !M_EVP_EncryptInit_ex(&ctx->cctx, cipher, impl, NULL, NULL)) - return 0; - /* Non-NULL key means initialisation complete */ - if (key) - { - int bl; - if (!M_EVP_CIPHER_CTX_cipher(&ctx->cctx)) - return 0; - if (!EVP_CIPHER_CTX_set_key_length(&ctx->cctx, keylen)) - return 0; - if (!M_EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, key, zero_iv)) - return 0; - bl = M_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 (!M_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_Init(CMAC_CTX *ctx, const void *key, size_t keylen, + const EVP_CIPHER *cipher, ENGINE *impl) +{ + static const unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH] = { 0 }; + /* All zeros means restart */ + if (!key && !cipher && !impl && keylen == 0) { + /* Not initialised */ + if (ctx->nlast_block == -1) + return 0; + if (!M_EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv)) + return 0; + memset(ctx->tbl, 0, M_EVP_CIPHER_CTX_block_size(&ctx->cctx)); + ctx->nlast_block = 0; + return 1; + } + /* Initialiase context */ + if (cipher && !M_EVP_EncryptInit_ex(&ctx->cctx, cipher, impl, NULL, NULL)) + return 0; + /* Non-NULL key means initialisation complete */ + if (key) { + int bl; + if (!M_EVP_CIPHER_CTX_cipher(&ctx->cctx)) + return 0; + if (!EVP_CIPHER_CTX_set_key_length(&ctx->cctx, keylen)) + return 0; + if (!M_EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, key, zero_iv)) + return 0; + bl = M_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 (!M_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; - if (ctx->nlast_block == -1) - return 0; - if (dlen == 0) - return 1; - bl = M_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; +{ + const unsigned char *data = in; + size_t bl; + if (ctx->nlast_block == -1) + return 0; + if (dlen == 0) + return 1; + bl = M_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; - if (ctx->nlast_block == -1) - return 0; - bl = M_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 i, bl, lb; + if (ctx->nlast_block == -1) + return 0; + bl = M_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 M_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 M_EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, ctx->tbl); +} diff --git a/crypto/cmac/cmac.h b/crypto/cmac/cmac.h index 712e92dced..175be8348a 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 +# include /* 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); -- cgit v1.2.3