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

/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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 <stdio.h>
#include <errno.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/evp.h>
#include "internal/bio.h"

static int enc_write(BIO *h, const char *buf, int num);
static int enc_read(BIO *h, char *buf, int size);
/*
 * static int enc_puts(BIO *h, const char *str);
 */
/*
 * static int enc_gets(BIO *h, char *str, int size);
 */
static long enc_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int enc_new(BIO *h);
static int enc_free(BIO *data);
static long enc_callback_ctrl(BIO *h, int cmd, bio_info_cb *fps);
#define ENC_BLOCK_SIZE  (1024*4)
#define BUF_OFFSET      (EVP_MAX_BLOCK_LENGTH*2)

typedef struct enc_struct {
    int buf_len;
    int buf_off;
    int cont;                   /* <= 0 when finished */
    int finished;
    int ok;                     /* bad decrypt */
    EVP_CIPHER_CTX *cipher;
    /*
     * buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate can return
     * up to a block more data than is presented to it
     */
    char buf[ENC_BLOCK_SIZE + BUF_OFFSET + 2];
} BIO_ENC_CTX;

static const BIO_METHOD methods_enc = {
    BIO_TYPE_CIPHER, "cipher",
    enc_write,
    enc_read,
    NULL,                       /* enc_puts, */
    NULL,                       /* enc_gets, */
    enc_ctrl,
    enc_new,
    enc_free,
    enc_callback_ctrl,
};

const BIO_METHOD *BIO_f_cipher(void)
{
    return (&methods_enc);
}

static int enc_new(BIO *bi)
{
    BIO_ENC_CTX *ctx;

    ctx = OPENSSL_zalloc(sizeof(*ctx));
    if (ctx == NULL)
        return 0;

    ctx->cipher = EVP_CIPHER_CTX_new();
    if (ctx->cipher == NULL) {
        OPENSSL_free(ctx);
        return 0;
    }
    ctx->cont = 1;
    ctx->ok = 1;
    BIO_set_data(bi, ctx);
    BIO_set_init(bi, 1);

    return 1;
}

static int enc_free(BIO *a)
{
    BIO_ENC_CTX *b;

    if (a == NULL)
        return 0;

    b = BIO_get_data(a);
    if (b == NULL)
        return 0;

    EVP_CIPHER_CTX_free(b->cipher);
    OPENSSL_clear_free(b, sizeof(BIO_ENC_CTX));
    BIO_set_data(a, NULL);
    BIO_set_init(a, 0);

    return 1;
}

static int enc_read(BIO *b, char *out, int outl)
{
    int ret = 0, i;
    BIO_ENC_CTX *ctx;
    BIO *next;

    if (out == NULL)
        return (0);
    ctx = BIO_get_data(b);

    next = BIO_next(b);
    if ((ctx == NULL) || (next == NULL))
        return 0;

    /* First check if there are bytes decoded/encoded */
    if (ctx->buf_len > 0) {
        i = ctx->buf_len - ctx->buf_off;
        if (i > outl)
            i = outl;
        memcpy(out, &(ctx->buf[ctx->buf_off]), i);
        ret = i;
        out += i;
        outl -= i;
        ctx->buf_off += i;
        if (ctx->buf_len == ctx->buf_off) {
            ctx->buf_len = 0;
            ctx->buf_off = 0;
        }
    }

    /*
     * At this point, we have room of outl bytes and an empty buffer, so we
     * should read in some more.
     */

    while (outl > 0) {
        if (ctx->cont <= 0)
            break;

        /*
         * read in at IV offset, read the EVP_Cipher documentation about why
         */
        i = BIO_read(next, &(ctx->buf[BUF_OFFSET]), ENC_BLOCK_SIZE);

        if (i <= 0) {
            /* Should be continue next time we are called? */
            if (!BIO_should_retry(next)) {
                ctx->cont = i;
                i = EVP_CipherFinal_ex(ctx->cipher,
                                       (unsigned char *)ctx->buf,
                                       &(ctx->buf_len));
                ctx->ok = i;
                ctx->buf_off = 0;
            } else {
                ret = (ret == 0) ? i : ret;
                break;
            }
        } else {
            if (!EVP_CipherUpdate(ctx->cipher,
                                  (unsigned char *)ctx->buf, &ctx->buf_len,
                                  (unsigned char *)&(ctx->buf[BUF_OFFSET]),
                                  i)) {
                BIO_clear_retry_flags(b);
                ctx->ok = 0;
                return 0;
            }
            ctx->cont = 1;
            /*
             * Note: it is possible for EVP_CipherUpdate to decrypt zero
             * bytes because this is or looks like the final block: if this
             * happens we should retry and either read more data or decrypt
             * the final block
             */
            if (ctx->buf_len == 0)
                continue;
        }

        if (ctx->buf_len <= outl)
            i = ctx->buf_len;
        else
            i = outl;
        if (i <= 0)
            break;
        memcpy(out, ctx->buf, i);
        ret += i;
        ctx->buf_off = i;
        outl -= i;
        out += i;
    }

    BIO_clear_retry_flags(b);
    BIO_copy_next_retry(b);
    return ((ret == 0) ? ctx->cont : ret);
}

static int enc_write(BIO *b, const char *in, int inl)
{
    int ret = 0, n, i;
    BIO_ENC_CTX *ctx;
    BIO *next;

    ctx = BIO_get_data(b);
    next = BIO_next(b);
    if ((ctx == NULL) || (next == NULL))
        return 0;

    ret = inl;

    BIO_clear_retry_flags(b);
    n = ctx->buf_len - ctx->buf_off;
    while (n > 0) {
        i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
        if (i <= 0) {
            BIO_copy_next_retry(b);
            return (i);
        }
        ctx->buf_off += i;
        n -= i;
    }
    /* at this point all pending data has been written */

    if ((in == NULL) || (inl <= 0))
        return (0);

    ctx->buf_off = 0;
    while (inl > 0) {
        n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
        if (!EVP_CipherUpdate(ctx->cipher,
                              (unsigned char *)ctx->buf, &ctx->buf_len,
                              (unsigned char *)in, n)) {
            BIO_clear_retry_flags(b);
            ctx->ok = 0;
            return 0;
        }
        inl -= n;
        in += n;

        ctx->buf_off = 0;
        n = ctx->buf_len;
        while (n > 0) {
            i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
            if (i <= 0) {
                BIO_copy_next_retry(b);
                return (ret == inl) ? i : ret - inl;
            }
            n -= i;
            ctx->buf_off += i;
        }
        ctx->buf_len = 0;
        ctx->buf_off = 0;
    }
    BIO_copy_next_retry(b);
    return (ret);
}

static long enc_ctrl(BIO *b, int cmd, long num, void *ptr)
{
    BIO *dbio;
    BIO_ENC_CTX *ctx, *dctx;
    long ret = 1;
    int i;
    EVP_CIPHER_CTX **c_ctx;
    BIO *next;

    ctx = BIO_get_data(b);
    next = BIO_next(b);
    if (ctx == NULL)
        return 0;

    switch (cmd) {
    case BIO_CTRL_RESET:
        ctx->ok = 1;
        ctx->finished = 0;
        if (!EVP_CipherInit_ex(ctx->cipher, NULL, NULL, NULL, NULL,
                               EVP_CIPHER_CTX_encrypting(ctx->cipher)))
            return 0;
        ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    case BIO_CTRL_EOF:         /* More to read */
        if (ctx->cont <= 0)
            ret = 1;
        else
            ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    case BIO_CTRL_WPENDING:
        ret = ctx->buf_len - ctx->buf_off;
        if (ret <= 0)
            ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    case BIO_CTRL_PENDING:     /* More to read in buffer */
        ret = ctx->buf_len - ctx->buf_off;
        if (ret <= 0)
            ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    case BIO_CTRL_FLUSH:
        /* do a final write */
 again:
        while (ctx->buf_len != ctx->buf_off) {
            i = enc_write(b, NULL, 0);
            if (i < 0)
                return i;
        }

        if (!ctx->finished) {
            ctx->finished = 1;
            ctx->buf_off = 0;
            ret = EVP_CipherFinal_ex(ctx->cipher,
                                     (unsigned char *)ctx->buf,
                                     &(ctx->buf_len));
            ctx->ok = (int)ret;
            if (ret <= 0)
                break;

            /* push out the bytes */
            goto again;
        }

        /* Finally flush the underlying BIO */
        ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    case BIO_C_GET_CIPHER_STATUS:
        ret = (long)ctx->ok;
        break;
    case BIO_C_DO_STATE_MACHINE:
        BIO_clear_retry_flags(b);
        ret = BIO_ctrl(next, cmd, num, ptr);
        BIO_copy_next_retry(b);
        break;
    case BIO_C_GET_CIPHER_CTX:
        c_ctx = (EVP_CIPHER_CTX **)ptr;
        *c_ctx = ctx->cipher;
        BIO_set_init(b, 1);
        break;
    case BIO_CTRL_DUP:
        dbio = (BIO *)ptr;
        dctx = BIO_get_data(dbio);
        dctx->cipher = EVP_CIPHER_CTX_new();
        if (dctx->cipher == NULL)
            return 0;
        ret = EVP_CIPHER_CTX_copy(dctx->cipher, ctx->cipher);
        if (ret)
            BIO_set_init(dbio, 1);
        break;
    default:
        ret = BIO_ctrl(next, cmd, num, ptr);
        break;
    }
    return (ret);
}

static long enc_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
{
    long ret = 1;
    BIO *next = BIO_next(b);

    if (next == NULL)
        return (0);
    switch (cmd) {
    default:
        ret = BIO_callback_ctrl(next, cmd, fp);
        break;
    }
    return (ret);
}

/*-
void BIO_set_cipher_ctx(b,c)
BIO *b;
EVP_CIPHER_ctx *c;
        {
        if (b == NULL) return;

        if ((b->callback != NULL) &&
                (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
                return;

        b->init=1;
        ctx=(BIO_ENC_CTX *)b->ptr;
        memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));

        if (b->callback != NULL)
                b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
        }
*/

int BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
                   const unsigned char *i, int e)
{
    BIO_ENC_CTX *ctx;
    long (*callback) (struct bio_st *, int, const char *, int, long, long);

    ctx = BIO_get_data(b);
    if (ctx == NULL)
        return 0;

    callback = BIO_get_callback(b);

    if ((callback != NULL) &&
            (callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e,
                      0L) <= 0))
        return 0;

    BIO_set_init(b, 1);

    if (!EVP_CipherInit_ex(ctx->cipher, c, NULL, k, i, e))
        return 0;

    if (callback != NULL)
        return callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
    return 1;
}
Commit	Line	Data
62867571 RS	1	/*
62867571 RS	2	* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
d02b48c6	3	*
62867571 RS	4	* Licensed under the OpenSSL license (the "License"). You may not use
	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
d02b48c6 RE	8	*/
	9
	10	#include <stdio.h>
	11	#include <errno.h>
b39fc560	12	#include "internal/cryptlib.h"
ec577822 BM	13	#include <openssl/buffer.h>
ec577822 BM	14	#include <openssl/evp.h>
a146ae55	15	#include "internal/bio.h"
d02b48c6	16
0e1c0612 UM	17	static int enc_write(BIO h, const char buf, int num);
0e1c0612 UM	18	static int enc_read(BIO h, char buf, int size);
0f113f3e MC	19	/*
	20	* static int enc_puts(BIO h, const char str);
	21	*/
	22	/*
	23	* static int enc_gets(BIO h, char str, int size);
	24	*/
0e1c0612	25	static long enc_ctrl(BIO h, int cmd, long arg1, void arg2);
d02b48c6 RE	26	static int enc_new(BIO *h);
d02b48c6 RE	27	static int enc_free(BIO *data);
13083215	28	static long enc_callback_ctrl(BIO h, int cmd, bio_info_cb fps);
0f113f3e MC	29	#define ENC_BLOCK_SIZE (1024*4)
	30	#define BUF_OFFSET (EVP_MAX_BLOCK_LENGTH*2)
	31
	32	typedef struct enc_struct {
	33	int buf_len;
	34	int buf_off;
	35	int cont; /* <= 0 when finished */
	36	int finished;
	37	int ok; /* bad decrypt */
846ec07d	38	EVP_CIPHER_CTX *cipher;
0f113f3e MC	39	/*
	40	* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate can return
	41	* up to a block more data than is presented to it
	42	*/
	43	char buf[ENC_BLOCK_SIZE + BUF_OFFSET + 2];
	44	} BIO_ENC_CTX;
	45
04f6b0fd	46	static const BIO_METHOD methods_enc = {
0f113f3e MC	47	BIO_TYPE_CIPHER, "cipher",
	48	enc_write,
	49	enc_read,
	50	NULL, /* enc_puts, */
	51	NULL, /* enc_gets, */
	52	enc_ctrl,
	53	enc_new,
	54	enc_free,
	55	enc_callback_ctrl,
	56	};
d02b48c6	57
04f6b0fd	58	const BIO_METHOD *BIO_f_cipher(void)
0f113f3e MC	59	{
	60	return (&methods_enc);
	61	}
d02b48c6	62
6b691a5c	63	static int enc_new(BIO *bi)
0f113f3e MC	64	{
	65	BIO_ENC_CTX *ctx;
	66
64b25758	67	ctx = OPENSSL_zalloc(sizeof(*ctx));
0f113f3e	68	if (ctx == NULL)
846ec07d	69	return 0;
0f113f3e	70
846ec07d RL	71	ctx->cipher = EVP_CIPHER_CTX_new();
	72	if (ctx->cipher == NULL) {
	73	OPENSSL_free(ctx);
	74	return 0;
	75	}
0f113f3e	76	ctx->cont = 1;
0f113f3e	77	ctx->ok = 1;
a146ae55 MC	78	BIO_set_data(bi, ctx);
	79	BIO_set_init(bi, 1);
	80
846ec07d	81	return 1;
0f113f3e	82	}
d02b48c6	83
6b691a5c	84	static int enc_free(BIO *a)
0f113f3e MC	85	{
	86	BIO_ENC_CTX *b;
	87
	88	if (a == NULL)
a146ae55 MC	89	return 0;
	90
	91	b = BIO_get_data(a);
	92	if (b == NULL)
	93	return 0;
	94
846ec07d	95	EVP_CIPHER_CTX_free(b->cipher);
a146ae55 MC	96	OPENSSL_clear_free(b, sizeof(BIO_ENC_CTX));
	97	BIO_set_data(a, NULL);
	98	BIO_set_init(a, 0);
	99
	100	return 1;
0f113f3e MC	101	}
0f113f3e MC	102
6b691a5c	103	static int enc_read(BIO b, char out, int outl)
0f113f3e MC	104	{
	105	int ret = 0, i;
	106	BIO_ENC_CTX *ctx;
a146ae55	107	BIO *next;
0f113f3e MC	108
	109	if (out == NULL)
	110	return (0);
a146ae55	111	ctx = BIO_get_data(b);
0f113f3e	112
a146ae55 MC	113	next = BIO_next(b);
	114	if ((ctx == NULL) \|\| (next == NULL))
	115	return 0;
0f113f3e MC	116
	117	/* First check if there are bytes decoded/encoded */
	118	if (ctx->buf_len > 0) {
	119	i = ctx->buf_len - ctx->buf_off;
	120	if (i > outl)
	121	i = outl;
	122	memcpy(out, &(ctx->buf[ctx->buf_off]), i);
	123	ret = i;
	124	out += i;
	125	outl -= i;
	126	ctx->buf_off += i;
	127	if (ctx->buf_len == ctx->buf_off) {
	128	ctx->buf_len = 0;
	129	ctx->buf_off = 0;
	130	}
	131	}
	132
	133	/*
	134	* At this point, we have room of outl bytes and an empty buffer, so we
	135	* should read in some more.
	136	*/
	137
	138	while (outl > 0) {
	139	if (ctx->cont <= 0)
	140	break;
	141
	142	/*
	143	* read in at IV offset, read the EVP_Cipher documentation about why
	144	*/
a146ae55	145	i = BIO_read(next, &(ctx->buf[BUF_OFFSET]), ENC_BLOCK_SIZE);
0f113f3e MC	146
	147	if (i <= 0) {
	148	/* Should be continue next time we are called? */
a146ae55	149	if (!BIO_should_retry(next)) {
0f113f3e	150	ctx->cont = i;
846ec07d	151	i = EVP_CipherFinal_ex(ctx->cipher,
0f113f3e MC	152	(unsigned char *)ctx->buf,
	153	&(ctx->buf_len));
	154	ctx->ok = i;
	155	ctx->buf_off = 0;
	156	} else {
	157	ret = (ret == 0) ? i : ret;
	158	break;
	159	}
	160	} else {
846ec07d	161	if (!EVP_CipherUpdate(ctx->cipher,
0f113f3e MC	162	(unsigned char *)ctx->buf, &ctx->buf_len,
	163	(unsigned char *)&(ctx->buf[BUF_OFFSET]),
	164	i)) {
	165	BIO_clear_retry_flags(b);
ee6ce5cc	166	ctx->ok = 0;
0f113f3e MC	167	return 0;
	168	}
	169	ctx->cont = 1;
	170	/*
	171	* Note: it is possible for EVP_CipherUpdate to decrypt zero
	172	* bytes because this is or looks like the final block: if this
	173	* happens we should retry and either read more data or decrypt
	174	* the final block
	175	*/
	176	if (ctx->buf_len == 0)
	177	continue;
	178	}
	179
	180	if (ctx->buf_len <= outl)
	181	i = ctx->buf_len;
	182	else
	183	i = outl;
	184	if (i <= 0)
	185	break;
	186	memcpy(out, ctx->buf, i);
	187	ret += i;
	188	ctx->buf_off = i;
	189	outl -= i;
	190	out += i;
	191	}
	192
	193	BIO_clear_retry_flags(b);
	194	BIO_copy_next_retry(b);
	195	return ((ret == 0) ? ctx->cont : ret);
	196	}
d02b48c6	197
0e1c0612	198	static int enc_write(BIO b, const char in, int inl)
0f113f3e MC	199	{
	200	int ret = 0, n, i;
	201	BIO_ENC_CTX *ctx;
a146ae55 MC	202	BIO *next;
	203
	204	ctx = BIO_get_data(b);
	205	next = BIO_next(b);
	206	if ((ctx == NULL) \|\| (next == NULL))
	207	return 0;
0f113f3e	208
0f113f3e MC	209	ret = inl;
	210
	211	BIO_clear_retry_flags(b);
	212	n = ctx->buf_len - ctx->buf_off;
	213	while (n > 0) {
a146ae55	214	i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
0f113f3e MC	215	if (i <= 0) {
	216	BIO_copy_next_retry(b);
	217	return (i);
	218	}
	219	ctx->buf_off += i;
	220	n -= i;
	221	}
	222	/* at this point all pending data has been written */
	223
	224	if ((in == NULL) \|\| (inl <= 0))
	225	return (0);
	226
	227	ctx->buf_off = 0;
	228	while (inl > 0) {
	229	n = (inl > ENC_BLOCK_SIZE) ? ENC_BLOCK_SIZE : inl;
846ec07d	230	if (!EVP_CipherUpdate(ctx->cipher,
0f113f3e MC	231	(unsigned char *)ctx->buf, &ctx->buf_len,
	232	(unsigned char *)in, n)) {
	233	BIO_clear_retry_flags(b);
976ef6ad	234	ctx->ok = 0;
0f113f3e MC	235	return 0;
	236	}
	237	inl -= n;
	238	in += n;
	239
	240	ctx->buf_off = 0;
	241	n = ctx->buf_len;
	242	while (n > 0) {
a146ae55	243	i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
0f113f3e MC	244	if (i <= 0) {
	245	BIO_copy_next_retry(b);
	246	return (ret == inl) ? i : ret - inl;
	247	}
	248	n -= i;
	249	ctx->buf_off += i;
	250	}
	251	ctx->buf_len = 0;
	252	ctx->buf_off = 0;
	253	}
	254	BIO_copy_next_retry(b);
	255	return (ret);
	256	}
d02b48c6	257
0e1c0612	258	static long enc_ctrl(BIO b, int cmd, long num, void ptr)
0f113f3e MC	259	{
	260	BIO *dbio;
	261	BIO_ENC_CTX ctx, dctx;
	262	long ret = 1;
	263	int i;
	264	EVP_CIPHER_CTX **c_ctx;
a146ae55	265	BIO *next;
0f113f3e	266
a146ae55 MC	267	ctx = BIO_get_data(b);
	268	next = BIO_next(b);
	269	if (ctx == NULL)
	270	return 0;
0f113f3e MC	271
	272	switch (cmd) {
	273	case BIO_CTRL_RESET:
	274	ctx->ok = 1;
	275	ctx->finished = 0;
846ec07d RL	276	if (!EVP_CipherInit_ex(ctx->cipher, NULL, NULL, NULL, NULL,
846ec07d RL	277	EVP_CIPHER_CTX_encrypting(ctx->cipher)))
0f113f3e	278	return 0;
a146ae55	279	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	280	break;
	281	case BIO_CTRL_EOF: /* More to read */
	282	if (ctx->cont <= 0)
	283	ret = 1;
	284	else
a146ae55	285	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	286	break;
	287	case BIO_CTRL_WPENDING:
	288	ret = ctx->buf_len - ctx->buf_off;
	289	if (ret <= 0)
a146ae55	290	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	291	break;
	292	case BIO_CTRL_PENDING: /* More to read in buffer */
	293	ret = ctx->buf_len - ctx->buf_off;
	294	if (ret <= 0)
a146ae55	295	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	296	break;
	297	case BIO_CTRL_FLUSH:
	298	/* do a final write */
	299	again:
	300	while (ctx->buf_len != ctx->buf_off) {
	301	i = enc_write(b, NULL, 0);
	302	if (i < 0)
	303	return i;
	304	}
	305
	306	if (!ctx->finished) {
	307	ctx->finished = 1;
	308	ctx->buf_off = 0;
846ec07d	309	ret = EVP_CipherFinal_ex(ctx->cipher,
0f113f3e MC	310	(unsigned char *)ctx->buf,
	311	&(ctx->buf_len));
	312	ctx->ok = (int)ret;
	313	if (ret <= 0)
	314	break;
	315
	316	/* push out the bytes */
	317	goto again;
	318	}
	319
	320	/* Finally flush the underlying BIO */
a146ae55	321	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	322	break;
	323	case BIO_C_GET_CIPHER_STATUS:
	324	ret = (long)ctx->ok;
	325	break;
	326	case BIO_C_DO_STATE_MACHINE:
	327	BIO_clear_retry_flags(b);
a146ae55	328	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	329	BIO_copy_next_retry(b);
	330	break;
	331	case BIO_C_GET_CIPHER_CTX:
	332	c_ctx = (EVP_CIPHER_CTX **)ptr;
846ec07d	333	*c_ctx = ctx->cipher;
a146ae55	334	BIO_set_init(b, 1);
0f113f3e MC	335	break;
	336	case BIO_CTRL_DUP:
	337	dbio = (BIO *)ptr;
a146ae55	338	dctx = BIO_get_data(dbio);
846ec07d RL	339	dctx->cipher = EVP_CIPHER_CTX_new();
	340	if (dctx->cipher == NULL)
	341	return 0;
	342	ret = EVP_CIPHER_CTX_copy(dctx->cipher, ctx->cipher);
0f113f3e	343	if (ret)
a146ae55	344	BIO_set_init(dbio, 1);
0f113f3e MC	345	break;
0f113f3e MC	346	default:
a146ae55	347	ret = BIO_ctrl(next, cmd, num, ptr);
0f113f3e MC	348	break;
	349	}
	350	return (ret);
	351	}
d02b48c6	352
13083215	353	static long enc_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
0f113f3e MC	354	{
0f113f3e MC	355	long ret = 1;
a146ae55	356	BIO *next = BIO_next(b);
0f113f3e	357
a146ae55	358	if (next == NULL)
0f113f3e MC	359	return (0);
	360	switch (cmd) {
	361	default:
a146ae55	362	ret = BIO_callback_ctrl(next, cmd, fp);
0f113f3e MC	363	break;
	364	}
	365	return (ret);
	366	}
d3442bc7	367
1d97c843	368	/*-
58964a49 RE	369	void BIO_set_cipher_ctx(b,c)
	370	BIO *b;
	371	EVP_CIPHER_ctx *c;
0f113f3e MC	372	{
	373	if (b == NULL) return;
	374
	375	if ((b->callback != NULL) &&
	376	(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
	377	return;
	378
	379	b->init=1;
	380	ctx=(BIO_ENC_CTX *)b->ptr;
	381	memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
	382
	383	if (b->callback != NULL)
	384	b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
	385	}
58964a49 RE	386	*/
58964a49 RE	387
b6dcdbfc	388	int BIO_set_cipher(BIO b, const EVP_CIPHER c, const unsigned char *k,
0f113f3e MC	389	const unsigned char *i, int e)
	390	{
	391	BIO_ENC_CTX *ctx;
a146ae55	392	long (callback) (struct bio_st , int, const char *, int, long, long);
0f113f3e	393
a146ae55 MC	394	ctx = BIO_get_data(b);
a146ae55 MC	395	if (ctx == NULL)
0f113f3e MC	396	return 0;
0f113f3e MC	397
a146ae55 MC	398	callback = BIO_get_callback(b);
	399
	400	if ((callback != NULL) &&
	401	(callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e,
	402	0L) <= 0))
0f113f3e MC	403	return 0;
0f113f3e MC	404
a146ae55 MC	405	BIO_set_init(b, 1);
a146ae55 MC	406
846ec07d	407	if (!EVP_CipherInit_ex(ctx->cipher, c, NULL, k, i, e))
0f113f3e MC	408	return 0;
0f113f3e MC	409
a146ae55 MC	410	if (callback != NULL)
a146ae55 MC	411	return callback(b, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
0f113f3e MC	412	return 1;
0f113f3e MC	413	}