[thirdparty/openssl.git] / crypto / evp / e_rc4_hmac_md5.c

/*
 * Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <openssl/opensslconf.h>

#include <stdio.h>
#include <string.h>

#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)

# include <openssl/crypto.h>
# include <openssl/evp.h>
# include <openssl/objects.h>
# include <openssl/rc4.h>
# include <openssl/md5.h>
# include "crypto/evp.h"

typedef struct {
    RC4_KEY ks;
    MD5_CTX head, tail, md;
    size_t payload_length;
} EVP_RC4_HMAC_MD5;

# define NO_PAYLOAD_LENGTH       ((size_t)-1)

void rc4_md5_enc(RC4_KEY *key, const void *in0, void *out,
                 MD5_CTX *ctx, const void *inp, size_t blocks);

# define data(ctx) ((EVP_RC4_HMAC_MD5 *)EVP_CIPHER_CTX_get_cipher_data(ctx))

static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
                                 const unsigned char *inkey,
                                 const unsigned char *iv, int enc)
{
    EVP_RC4_HMAC_MD5 *key = data(ctx);

    RC4_set_key(&key->ks, EVP_CIPHER_CTX_key_length(ctx), inkey);

    MD5_Init(&key->head);       /* handy when benchmarking */
    key->tail = key->head;
    key->md = key->head;

    key->payload_length = NO_PAYLOAD_LENGTH;

    return 1;
}

# if     defined(RC4_ASM) && defined(MD5_ASM) &&     (     \
        defined(__x86_64)       || defined(__x86_64__)  || \
        defined(_M_AMD64)       || defined(_M_X64)      )
#  define STITCHED_CALL
# endif

# if !defined(STITCHED_CALL)
#  define rc4_off 0
#  define md5_off 0
# endif

static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                               const unsigned char *in, size_t len)
{
    EVP_RC4_HMAC_MD5 *key = data(ctx);
# if defined(STITCHED_CALL)
    size_t rc4_off = 32 - 1 - (key->ks.x & (32 - 1)), /* 32 is $MOD from
                                                       * rc4_md5-x86_64.pl */
        md5_off = MD5_CBLOCK - key->md.num, blocks;
    unsigned int l;
# endif
    size_t plen = key->payload_length;

    if (plen != NO_PAYLOAD_LENGTH && len != (plen + MD5_DIGEST_LENGTH))
        return 0;

    if (EVP_CIPHER_CTX_encrypting(ctx)) {
        if (plen == NO_PAYLOAD_LENGTH)
            plen = len;
# if defined(STITCHED_CALL)
        /* cipher has to "fall behind" */
        if (rc4_off > md5_off)
            md5_off += MD5_CBLOCK;

        if (plen > md5_off && (blocks = (plen - md5_off) / MD5_CBLOCK) &&
            (OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
            MD5_Update(&key->md, in, md5_off);
            RC4(&key->ks, rc4_off, in, out);

            rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
                        &key->md, in + md5_off, blocks);
            blocks *= MD5_CBLOCK;
            rc4_off += blocks;
            md5_off += blocks;
            key->md.Nh += blocks >> 29;
            key->md.Nl += blocks <<= 3;
            if (key->md.Nl < (unsigned int)blocks)
                key->md.Nh++;
        } else {
            rc4_off = 0;
            md5_off = 0;
        }
# endif
        MD5_Update(&key->md, in + md5_off, plen - md5_off);

        if (plen != len) {      /* "TLS" mode of operation */
            if (in != out)
                memcpy(out + rc4_off, in + rc4_off, plen - rc4_off);

            /* calculate HMAC and append it to payload */
            MD5_Final(out + plen, &key->md);
            key->md = key->tail;
            MD5_Update(&key->md, out + plen, MD5_DIGEST_LENGTH);
            MD5_Final(out + plen, &key->md);
            /* encrypt HMAC at once */
            RC4(&key->ks, len - rc4_off, out + rc4_off, out + rc4_off);
        } else {
            RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
        }
    } else {
        unsigned char mac[MD5_DIGEST_LENGTH];
# if defined(STITCHED_CALL)
        /* digest has to "fall behind" */
        if (md5_off > rc4_off)
            rc4_off += 2 * MD5_CBLOCK;
        else
            rc4_off += MD5_CBLOCK;

        if (len > rc4_off && (blocks = (len - rc4_off) / MD5_CBLOCK) &&
            (OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
            RC4(&key->ks, rc4_off, in, out);
            MD5_Update(&key->md, out, md5_off);

            rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
                        &key->md, out + md5_off, blocks);
            blocks *= MD5_CBLOCK;
            rc4_off += blocks;
            md5_off += blocks;
            l = (key->md.Nl + (blocks << 3)) & 0xffffffffU;
            if (l < key->md.Nl)
                key->md.Nh++;
            key->md.Nl = l;
            key->md.Nh += blocks >> 29;
        } else {
            md5_off = 0;
            rc4_off = 0;
        }
# endif
        /* decrypt HMAC at once */
        RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
        if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
            MD5_Update(&key->md, out + md5_off, plen - md5_off);

            /* calculate HMAC and verify it */
            MD5_Final(mac, &key->md);
            key->md = key->tail;
            MD5_Update(&key->md, mac, MD5_DIGEST_LENGTH);
            MD5_Final(mac, &key->md);

            if (CRYPTO_memcmp(out + plen, mac, MD5_DIGEST_LENGTH))
                return 0;
        } else {
            MD5_Update(&key->md, out + md5_off, len - md5_off);
        }
    }

    key->payload_length = NO_PAYLOAD_LENGTH;

    return 1;
}

static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
                             void *ptr)
{
    EVP_RC4_HMAC_MD5 *key = data(ctx);

    switch (type) {
    case EVP_CTRL_AEAD_SET_MAC_KEY:
        {
            unsigned int i;
            unsigned char hmac_key[64];

            memset(hmac_key, 0, sizeof(hmac_key));

            if (arg > (int)sizeof(hmac_key)) {
                MD5_Init(&key->head);
                MD5_Update(&key->head, ptr, arg);
                MD5_Final(hmac_key, &key->head);
            } else {
                memcpy(hmac_key, ptr, arg);
            }

            for (i = 0; i < sizeof(hmac_key); i++)
                hmac_key[i] ^= 0x36; /* ipad */
            MD5_Init(&key->head);
            MD5_Update(&key->head, hmac_key, sizeof(hmac_key));

            for (i = 0; i < sizeof(hmac_key); i++)
                hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
            MD5_Init(&key->tail);
            MD5_Update(&key->tail, hmac_key, sizeof(hmac_key));

            OPENSSL_cleanse(hmac_key, sizeof(hmac_key));

            return 1;
        }
    case EVP_CTRL_AEAD_TLS1_AAD:
        {
            unsigned char *p = ptr;
            unsigned int len;

            if (arg != EVP_AEAD_TLS1_AAD_LEN)
                return -1;

            len = p[arg - 2] << 8 | p[arg - 1];

            if (!EVP_CIPHER_CTX_encrypting(ctx)) {
                if (len < MD5_DIGEST_LENGTH)
                    return -1;
                len -= MD5_DIGEST_LENGTH;
                p[arg - 2] = len >> 8;
                p[arg - 1] = len;
            }
            key->payload_length = len;
            key->md = key->head;
            MD5_Update(&key->md, p, arg);

            return MD5_DIGEST_LENGTH;
        }
    default:
        return -1;
    }
}

static EVP_CIPHER r4_hmac_md5_cipher = {
# ifdef NID_rc4_hmac_md5
    NID_rc4_hmac_md5,
# else
    NID_undef,
# endif
    1, EVP_RC4_KEY_SIZE, 0,
    EVP_CIPH_STREAM_CIPHER | EVP_CIPH_VARIABLE_LENGTH |
        EVP_CIPH_FLAG_AEAD_CIPHER,
    rc4_hmac_md5_init_key,
    rc4_hmac_md5_cipher,
    NULL,
    sizeof(EVP_RC4_HMAC_MD5),
    NULL,
    NULL,
    rc4_hmac_md5_ctrl,
    NULL
};

const EVP_CIPHER *EVP_rc4_hmac_md5(void)
{
    return &r4_hmac_md5_cipher;
}
#endif
Commit	Line	Data
62867571 RS	1	/*
62867571 RS	2	* Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
c608171d	3	*
4a8b0c55	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
62867571 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
c608171d AP	8	*/
	9
	10	#include <openssl/opensslconf.h>
	11
	12	#include <stdio.h>
	13	#include <string.h>
	14
	15	#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
	16
1e4a355d	17	# include <openssl/crypto.h>
0f113f3e MC	18	# include <openssl/evp.h>
	19	# include <openssl/objects.h>
	20	# include <openssl/rc4.h>
	21	# include <openssl/md5.h>
25f2138b	22	# include "crypto/evp.h"
0f113f3e	23
0f113f3e MC	24	typedef struct {
	25	RC4_KEY ks;
	26	MD5_CTX head, tail, md;
	27	size_t payload_length;
	28	} EVP_RC4_HMAC_MD5;
c608171d	29
0f113f3e	30	# define NO_PAYLOAD_LENGTH ((size_t)-1)
6dd9b0fc	31
0f113f3e MC	32	void rc4_md5_enc(RC4_KEY key, const void in0, void *out,
0f113f3e MC	33	MD5_CTX ctx, const void inp, size_t blocks);
c608171d	34
44ab2dfd	35	# define data(ctx) ((EVP_RC4_HMAC_MD5 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
c608171d AP	36
c608171d AP	37	static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
0f113f3e MC	38	const unsigned char *inkey,
	39	const unsigned char *iv, int enc)
	40	{
	41	EVP_RC4_HMAC_MD5 *key = data(ctx);
c608171d	42
0f113f3e	43	RC4_set_key(&key->ks, EVP_CIPHER_CTX_key_length(ctx), inkey);
c608171d	44
0f113f3e MC	45	MD5_Init(&key->head); /* handy when benchmarking */
	46	key->tail = key->head;
	47	key->md = key->head;
c608171d	48
0f113f3e	49	key->payload_length = NO_PAYLOAD_LENGTH;
c608171d	50
0f113f3e MC	51	return 1;
0f113f3e MC	52	}
c608171d	53
dd6b2706	54	# if defined(RC4_ASM) && defined(MD5_ASM) && ( \
0f113f3e	55	defined(__x86_64) \|\| defined(__x86_64__) \|\| \
b1a07c38	56	defined(_M_AMD64) \|\| defined(_M_X64) )
0f113f3e MC	57	# define STITCHED_CALL
0f113f3e MC	58	# endif
c608171d	59
0f113f3e MC	60	# if !defined(STITCHED_CALL)
	61	# define rc4_off 0
	62	# define md5_off 0
	63	# endif
c608171d AP	64
c608171d AP	65	static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
0f113f3e MC	66	const unsigned char *in, size_t len)
	67	{
	68	EVP_RC4_HMAC_MD5 *key = data(ctx);
	69	# if defined(STITCHED_CALL)
	70	size_t rc4_off = 32 - 1 - (key->ks.x & (32 - 1)), /* 32 is $MOD from
	71	* rc4_md5-x86_64.pl */
	72	md5_off = MD5_CBLOCK - key->md.num, blocks;
	73	unsigned int l;
0f113f3e MC	74	# endif
	75	size_t plen = key->payload_length;
	76
	77	if (plen != NO_PAYLOAD_LENGTH && len != (plen + MD5_DIGEST_LENGTH))
	78	return 0;
	79
936166af	80	if (EVP_CIPHER_CTX_encrypting(ctx)) {
0f113f3e MC	81	if (plen == NO_PAYLOAD_LENGTH)
	82	plen = len;
	83	# if defined(STITCHED_CALL)
	84	/* cipher has to "fall behind" */
	85	if (rc4_off > md5_off)
	86	md5_off += MD5_CBLOCK;
	87
	88	if (plen > md5_off && (blocks = (plen - md5_off) / MD5_CBLOCK) &&
	89	(OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
	90	MD5_Update(&key->md, in, md5_off);
	91	RC4(&key->ks, rc4_off, in, out);
	92
	93	rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
	94	&key->md, in + md5_off, blocks);
	95	blocks *= MD5_CBLOCK;
	96	rc4_off += blocks;
	97	md5_off += blocks;
	98	key->md.Nh += blocks >> 29;
	99	key->md.Nl += blocks <<= 3;
	100	if (key->md.Nl < (unsigned int)blocks)
	101	key->md.Nh++;
	102	} else {
	103	rc4_off = 0;
	104	md5_off = 0;
	105	}
	106	# endif
	107	MD5_Update(&key->md, in + md5_off, plen - md5_off);
	108
	109	if (plen != len) { /* "TLS" mode of operation */
	110	if (in != out)
	111	memcpy(out + rc4_off, in + rc4_off, plen - rc4_off);
	112
	113	/* calculate HMAC and append it to payload */
	114	MD5_Final(out + plen, &key->md);
	115	key->md = key->tail;
	116	MD5_Update(&key->md, out + plen, MD5_DIGEST_LENGTH);
	117	MD5_Final(out + plen, &key->md);
	118	/* encrypt HMAC at once */
	119	RC4(&key->ks, len - rc4_off, out + rc4_off, out + rc4_off);
	120	} else {
	121	RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
	122	}
	123	} else {
	124	unsigned char mac[MD5_DIGEST_LENGTH];
	125	# if defined(STITCHED_CALL)
	126	/* digest has to "fall behind" */
	127	if (md5_off > rc4_off)
	128	rc4_off += 2 * MD5_CBLOCK;
	129	else
	130	rc4_off += MD5_CBLOCK;
	131
	132	if (len > rc4_off && (blocks = (len - rc4_off) / MD5_CBLOCK) &&
	133	(OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
	134	RC4(&key->ks, rc4_off, in, out);
	135	MD5_Update(&key->md, out, md5_off);
	136
	137	rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
	138	&key->md, out + md5_off, blocks);
	139	blocks *= MD5_CBLOCK;
	140	rc4_off += blocks;
	141	md5_off += blocks;
	142	l = (key->md.Nl + (blocks << 3)) & 0xffffffffU;
	143	if (l < key->md.Nl)
	144	key->md.Nh++;
145	key->md.Nl = l;
146	key->md.Nh += blocks >> 29;
147	} else {
148	md5_off = 0;
149	rc4_off = 0;
150	}
151	# endif
152	/* decrypt HMAC at once */
153	RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
154	if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
155	MD5_Update(&key->md, out + md5_off, plen - md5_off);
156
157	/* calculate HMAC and verify it */
158	MD5_Final(mac, &key->md);
159	key->md = key->tail;
160	MD5_Update(&key->md, mac, MD5_DIGEST_LENGTH);
161	MD5_Final(mac, &key->md);
162
1e4a355d	163	if (CRYPTO_memcmp(out + plen, mac, MD5_DIGEST_LENGTH))
0f113f3e MC	164	return 0;
	165	} else {
	166	MD5_Update(&key->md, out + md5_off, len - md5_off);
	167	}
	168	}
	169
	170	key->payload_length = NO_PAYLOAD_LENGTH;
	171
	172	return 1;
	173	}
	174
	175	static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
	176	void *ptr)
	177	{
	178	EVP_RC4_HMAC_MD5 *key = data(ctx);
	179
	180	switch (type) {
	181	case EVP_CTRL_AEAD_SET_MAC_KEY:
	182	{
	183	unsigned int i;
	184	unsigned char hmac_key[64];
	185
	186	memset(hmac_key, 0, sizeof(hmac_key));
	187
	188	if (arg > (int)sizeof(hmac_key)) {
	189	MD5_Init(&key->head);
	190	MD5_Update(&key->head, ptr, arg);
	191	MD5_Final(hmac_key, &key->head);
	192	} else {
	193	memcpy(hmac_key, ptr, arg);
	194	}
	195
	196	for (i = 0; i < sizeof(hmac_key); i++)
	197	hmac_key[i] ^= 0x36; /* ipad */
	198	MD5_Init(&key->head);
	199	MD5_Update(&key->head, hmac_key, sizeof(hmac_key));
	200
	201	for (i = 0; i < sizeof(hmac_key); i++)
	202	hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
	203	MD5_Init(&key->tail);
	204	MD5_Update(&key->tail, hmac_key, sizeof(hmac_key));
	205
0def528b MC	206	OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
0def528b MC	207
0f113f3e MC	208	return 1;
	209	}
	210	case EVP_CTRL_AEAD_TLS1_AAD:
	211	{
	212	unsigned char *p = ptr;
c8269881 MC	213	unsigned int len;
	214
	215	if (arg != EVP_AEAD_TLS1_AAD_LEN)
	216	return -1;
	217
	218	len = p[arg - 2] << 8 \| p[arg - 1];
0f113f3e	219
936166af	220	if (!EVP_CIPHER_CTX_encrypting(ctx)) {
8e204996 AP	221	if (len < MD5_DIGEST_LENGTH)
8e204996 AP	222	return -1;
0f113f3e MC	223	len -= MD5_DIGEST_LENGTH;
	224	p[arg - 2] = len >> 8;
	225	p[arg - 1] = len;
	226	}
	227	key->payload_length = len;
	228	key->md = key->head;
	229	MD5_Update(&key->md, p, arg);
	230
	231	return MD5_DIGEST_LENGTH;
	232	}
	233	default:
	234	return -1;
	235	}
	236	}
	237
	238	static EVP_CIPHER r4_hmac_md5_cipher = {
	239	# ifdef NID_rc4_hmac_md5
	240	NID_rc4_hmac_md5,
	241	# else
	242	NID_undef,
	243	# endif
	244	1, EVP_RC4_KEY_SIZE, 0,
	245	EVP_CIPH_STREAM_CIPHER \| EVP_CIPH_VARIABLE_LENGTH \|
	246	EVP_CIPH_FLAG_AEAD_CIPHER,
	247	rc4_hmac_md5_init_key,
	248	rc4_hmac_md5_cipher,
	249	NULL,
	250	sizeof(EVP_RC4_HMAC_MD5),
	251	NULL,
	252	NULL,
	253	rc4_hmac_md5_ctrl,
	254	NULL
	255	};
c608171d AP	256
c608171d AP	257	const EVP_CIPHER *EVP_rc4_hmac_md5(void)
0f113f3e	258	{
26a7d938	259	return &r4_hmac_md5_cipher;
0f113f3e	260	}
c608171d	261	#endif