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

/*
 * Copyright 2006-2018 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 <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "internal/evp_int.h"
#include "evp_locl.h"

static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
{
    EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
    return 0;
}

static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                          const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey,
                          int ver)
{
    if (ctx->pctx == NULL)
        ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
    if (ctx->pctx == NULL)
        return 0;

    if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {

        if (type == NULL) {
            int def_nid;
            if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
                type = EVP_get_digestbynid(def_nid);
        }

        if (type == NULL) {
            EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
            return 0;
        }
    }

    if (ver) {
        if (ctx->pctx->pmeth->verifyctx_init) {
            if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
                return 0;
            ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
        } else if (ctx->pctx->pmeth->digestverify != 0) {
            ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
            ctx->update = update;
        } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
            return 0;
        }
    } else {
        if (ctx->pctx->pmeth->signctx_init) {
            if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
                return 0;
            ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
        } else if (ctx->pctx->pmeth->digestsign != 0) {
            ctx->pctx->operation = EVP_PKEY_OP_SIGN;
            ctx->update = update;
        } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
            return 0;
        }
    }
    if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
        return 0;
    if (pctx)
        *pctx = ctx->pctx;
    if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
        return 1;
    if (!EVP_DigestInit_ex(ctx, type, e))
        return 0;
    /*
     * This indicates the current algorithm requires
     * special treatment before hashing the tbs-message.
     */
    if (ctx->pctx->pmeth->digest_custom != NULL)
        return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);

    return 1;
}

int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                       const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
{
    return do_sigver_init(ctx, pctx, type, e, pkey, 0);
}

int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                         const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
{
    return do_sigver_init(ctx, pctx, type, e, pkey, 1);
}

int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
                        size_t *siglen)
{
    int sctx = 0, r = 0;
    EVP_PKEY_CTX *pctx = ctx->pctx;
    if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
        if (!sigret)
            return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
        if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
            r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
        else {
            EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
            if (!dctx)
                return 0;
            r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
            EVP_PKEY_CTX_free(dctx);
        }
        return r;
    }
    if (pctx->pmeth->signctx)
        sctx = 1;
    else
        sctx = 0;
    if (sigret) {
        unsigned char md[EVP_MAX_MD_SIZE];
        unsigned int mdlen = 0;
        if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
            if (sctx)
                r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
            else
                r = EVP_DigestFinal_ex(ctx, md, &mdlen);
        } else {
            EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
            if (tmp_ctx == NULL)
                return 0;
            if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
                EVP_MD_CTX_free(tmp_ctx);
                return 0;
            }
            if (sctx)
                r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
                                                  sigret, siglen, tmp_ctx);
            else
                r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
            EVP_MD_CTX_free(tmp_ctx);
        }
        if (sctx || !r)
            return r;
        if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
            return 0;
    } else {
        if (sctx) {
            if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
                return 0;
        } else {
            int s = EVP_MD_size(ctx->digest);
            if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
                return 0;
        }
    }
    return 1;
}

int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
                   const unsigned char *tbs, size_t tbslen)
{
    if (ctx->pctx->pmeth->digestsign != NULL)
        return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
    if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
        return 0;
    return EVP_DigestSignFinal(ctx, sigret, siglen);
}

int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
                          size_t siglen)
{
    unsigned char md[EVP_MAX_MD_SIZE];
    int r = 0;
    unsigned int mdlen = 0;
    int vctx = 0;

    if (ctx->pctx->pmeth->verifyctx)
        vctx = 1;
    else
        vctx = 0;
    if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
        if (vctx)
            r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
        else
            r = EVP_DigestFinal_ex(ctx, md, &mdlen);
    } else {
        EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
        if (tmp_ctx == NULL)
            return -1;
        if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
            EVP_MD_CTX_free(tmp_ctx);
            return -1;
        }
        if (vctx)
            r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
                                                sig, siglen, tmp_ctx);
        else
            r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
        EVP_MD_CTX_free(tmp_ctx);
    }
    if (vctx || !r)
        return r;
    return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
}

int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
                     size_t siglen, const unsigned char *tbs, size_t tbslen)
{
    if (ctx->pctx->pmeth->digestverify != NULL)
        return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
    if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
        return -1;
    return EVP_DigestVerifyFinal(ctx, sigret, siglen);
}
Commit	Line	Data
0f113f3e	1	/*
4803717f	2	* Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
91c9e621	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
91c9e621 DSH	8	*/
	9
	10	#include <stdio.h>
b39fc560	11	#include "internal/cryptlib.h"
91c9e621 DSH	12	#include <openssl/evp.h>
	13	#include <openssl/objects.h>
	14	#include <openssl/x509.h>
27af42f9	15	#include "internal/evp_int.h"
77a01145	16	#include "evp_locl.h"
91c9e621	17
f723c98e DSH	18	static int update(EVP_MD_CTX ctx, const void data, size_t datalen)
	19	{
	20	EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
	21	return 0;
	22	}
	23
777c47ac	24	static int do_sigver_init(EVP_MD_CTX ctx, EVP_PKEY_CTX *pctx,
0f113f3e MC	25	const EVP_MD type, ENGINE e, EVP_PKEY *pkey,
	26	int ver)
	27	{
	28	if (ctx->pctx == NULL)
	29	ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
	30	if (ctx->pctx == NULL)
	31	return 0;
e69adea5	32
0f113f3e	33	if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
e69adea5	34
0f113f3e MC	35	if (type == NULL) {
	36	int def_nid;
	37	if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
	38	type = EVP_get_digestbynid(def_nid);
	39	}
c8ef656d	40
0f113f3e MC	41	if (type == NULL) {
	42	EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
	43	return 0;
	44	}
	45	}
e69adea5	46
0f113f3e MC	47	if (ver) {
	48	if (ctx->pctx->pmeth->verifyctx_init) {
	49	if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
	50	return 0;
	51	ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
f723c98e DSH	52	} else if (ctx->pctx->pmeth->digestverify != 0) {
	53	ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
	54	ctx->update = update;
	55	} else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
0f113f3e	56	return 0;
f723c98e	57	}
0f113f3e MC	58	} else {
	59	if (ctx->pctx->pmeth->signctx_init) {
	60	if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
	61	return 0;
	62	ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
f723c98e DSH	63	} else if (ctx->pctx->pmeth->digestsign != 0) {
	64	ctx->pctx->operation = EVP_PKEY_OP_SIGN;
	65	ctx->update = update;
	66	} else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
0f113f3e	67	return 0;
f723c98e	68	}
0f113f3e MC	69	}
	70	if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
	71	return 0;
	72	if (pctx)
	73	*pctx = ctx->pctx;
	74	if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
	75	return 1;
	76	if (!EVP_DigestInit_ex(ctx, type, e))
	77	return 0;
4803717f PY	78	/*
	79	* This indicates the current algorithm requires
	80	* special treatment before hashing the tbs-message.
	81	*/
675f4cee	82	if (ctx->pctx->pmeth->digest_custom != NULL)
4803717f PY	83	return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
4803717f PY	84
0f113f3e MC	85	return 1;
0f113f3e MC	86	}
91c9e621 DSH	87
91c9e621 DSH	88	int EVP_DigestSignInit(EVP_MD_CTX ctx, EVP_PKEY_CTX *pctx,
0f113f3e MC	89	const EVP_MD type, ENGINE e, EVP_PKEY *pkey)
	90	{
	91	return do_sigver_init(ctx, pctx, type, e, pkey, 0);
	92	}
91c9e621 DSH	93
91c9e621 DSH	94	int EVP_DigestVerifyInit(EVP_MD_CTX ctx, EVP_PKEY_CTX *pctx,
0f113f3e MC	95	const EVP_MD type, ENGINE e, EVP_PKEY *pkey)
	96	{
	97	return do_sigver_init(ctx, pctx, type, e, pkey, 1);
	98	}
91c9e621	99
0f113f3e MC	100	int EVP_DigestSignFinal(EVP_MD_CTX ctx, unsigned char sigret,
	101	size_t *siglen)
	102	{
4c9b0a03	103	int sctx = 0, r = 0;
0f113f3e MC	104	EVP_PKEY_CTX *pctx = ctx->pctx;
	105	if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
	106	if (!sigret)
	107	return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
	108	if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
	109	r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
	110	else {
	111	EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
	112	if (!dctx)
	113	return 0;
	114	r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
	115	EVP_PKEY_CTX_free(dctx);
	116	}
	117	return r;
	118	}
	119	if (pctx->pmeth->signctx)
	120	sctx = 1;
	121	else
	122	sctx = 0;
	123	if (sigret) {
	124	unsigned char md[EVP_MAX_MD_SIZE];
4c9b0a03	125	unsigned int mdlen = 0;
0f113f3e MC	126	if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
	127	if (sctx)
	128	r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
	129	else
	130	r = EVP_DigestFinal_ex(ctx, md, &mdlen);
	131	} else {
bfb0641f	132	EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
19546246	133	if (tmp_ctx == NULL)
0f113f3e	134	return 0;
19546246 BE	135	if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
	136	EVP_MD_CTX_free(tmp_ctx);
	137	return 0;
	138	}
0f113f3e	139	if (sctx)
77a01145 RL	140	r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
77a01145 RL	141	sigret, siglen, tmp_ctx);
0f113f3e	142	else
77a01145	143	r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
bfb0641f	144	EVP_MD_CTX_free(tmp_ctx);
0f113f3e MC	145	}
	146	if (sctx \|\| !r)
	147	return r;
	148	if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
	149	return 0;
	150	} else {
	151	if (sctx) {
	152	if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
	153	return 0;
	154	} else {
	155	int s = EVP_MD_size(ctx->digest);
	156	if (s < 0 \|\| EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
	157	return 0;
	158	}
	159	}
	160	return 1;
	161	}
91c9e621	162
75394189 DSH	163	int EVP_DigestSign(EVP_MD_CTX ctx, unsigned char sigret, size_t *siglen,
	164	const unsigned char *tbs, size_t tbslen)
	165	{
f723c98e DSH	166	if (ctx->pctx->pmeth->digestsign != NULL)
f723c98e DSH	167	return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
75394189 DSH	168	if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
	169	return 0;
	170	return EVP_DigestSignFinal(ctx, sigret, siglen);
	171	}
	172
0f7fa1b1	173	int EVP_DigestVerifyFinal(EVP_MD_CTX ctx, const unsigned char sig,
0f113f3e MC	174	size_t siglen)
	175	{
	176	unsigned char md[EVP_MAX_MD_SIZE];
4c9b0a03 GK	177	int r = 0;
	178	unsigned int mdlen = 0;
	179	int vctx = 0;
0eab41fb	180
0f113f3e MC	181	if (ctx->pctx->pmeth->verifyctx)
	182	vctx = 1;
	183	else
	184	vctx = 0;
	185	if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
4803717f	186	if (vctx)
0f113f3e	187	r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
4803717f	188	else
0f113f3e MC	189	r = EVP_DigestFinal_ex(ctx, md, &mdlen);
0f113f3e MC	190	} else {
bfb0641f	191	EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
19546246 BE	192	if (tmp_ctx == NULL)
	193	return -1;
	194	if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
	195	EVP_MD_CTX_free(tmp_ctx);
0f113f3e	196	return -1;
19546246	197	}
4803717f	198	if (vctx)
77a01145 RL	199	r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
77a01145 RL	200	sig, siglen, tmp_ctx);
4803717f	201	else
77a01145	202	r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
bfb0641f	203	EVP_MD_CTX_free(tmp_ctx);
0f113f3e MC	204	}
	205	if (vctx \|\| !r)
	206	return r;
	207	return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
	208	}
75394189 DSH	209
	210	int EVP_DigestVerify(EVP_MD_CTX ctx, const unsigned char sigret,
	211	size_t siglen, const unsigned char *tbs, size_t tbslen)
	212	{
f723c98e DSH	213	if (ctx->pctx->pmeth->digestverify != NULL)
f723c98e DSH	214	return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
75394189 DSH	215	if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
	216	return -1;
	217	return EVP_DigestVerifyFinal(ctx, sigret, siglen);
	218	}