[thirdparty/openssl.git] / crypto / dsa / dsa_ameth.c

/*
 * Copyright 2006-2016 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 <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include "dsa_locl.h"
#include <openssl/bn.h>
#include <openssl/cms.h>
#include "internal/asn1_int.h"
#include "internal/evp_int.h"

static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
{
    const unsigned char *p, *pm;
    int pklen, pmlen;
    int ptype;
    const void *pval;
    const ASN1_STRING *pstr;
    X509_ALGOR *palg;
    ASN1_INTEGER *public_key = NULL;

    DSA *dsa = NULL;

    if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
        return 0;
    X509_ALGOR_get0(NULL, &ptype, &pval, palg);

    if (ptype == V_ASN1_SEQUENCE) {
        pstr = pval;
        pm = pstr->data;
        pmlen = pstr->length;

        if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
            DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
            goto err;
        }

    } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
        if ((dsa = DSA_new()) == NULL) {
            DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    } else {
        DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
        goto err;
    }

    if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
        DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
        goto err;
    }

    if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
        DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
        goto err;
    }

    ASN1_INTEGER_free(public_key);
    EVP_PKEY_assign_DSA(pkey, dsa);
    return 1;

 err:
    ASN1_INTEGER_free(public_key);
    DSA_free(dsa);
    return 0;

}

static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
{
    DSA *dsa;
    int ptype;
    unsigned char *penc = NULL;
    int penclen;
    ASN1_STRING *str = NULL;
    ASN1_INTEGER *pubint = NULL;
    ASN1_OBJECT *aobj;

    dsa = pkey->pkey.dsa;
    if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
        str = ASN1_STRING_new();
        if (str == NULL) {
            DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        str->length = i2d_DSAparams(dsa, &str->data);
        if (str->length <= 0) {
            DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ptype = V_ASN1_SEQUENCE;
    } else
        ptype = V_ASN1_UNDEF;

    pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);

    if (pubint == NULL) {
        DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    penclen = i2d_ASN1_INTEGER(pubint, &penc);
    ASN1_INTEGER_free(pubint);

    if (penclen <= 0) {
        DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    aobj = OBJ_nid2obj(EVP_PKEY_DSA);
    if (aobj == NULL)
        goto err;

    if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
        return 1;

 err:
    OPENSSL_free(penc);
    ASN1_STRING_free(str);

    return 0;
}

/*
 * In PKCS#8 DSA: you just get a private key integer and parameters in the
 * AlgorithmIdentifier the pubkey must be recalculated.
 */

static int dsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
{
    const unsigned char *p, *pm;
    int pklen, pmlen;
    int ptype;
    const void *pval;
    const ASN1_STRING *pstr;
    const X509_ALGOR *palg;
    ASN1_INTEGER *privkey = NULL;
    BN_CTX *ctx = NULL;

    DSA *dsa = NULL;

    int ret = 0;

    if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
        return 0;
    X509_ALGOR_get0(NULL, &ptype, &pval, palg);

    if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
        goto decerr;
    if (privkey->type == V_ASN1_NEG_INTEGER || ptype != V_ASN1_SEQUENCE)
        goto decerr;

    pstr = pval;
    pm = pstr->data;
    pmlen = pstr->length;
    if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
        goto decerr;
    /* We have parameters now set private key */
    if ((dsa->priv_key = BN_secure_new()) == NULL
        || !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
        DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
        goto dsaerr;
    }
    /* Calculate public key */
    if ((dsa->pub_key = BN_new()) == NULL) {
        DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
        goto dsaerr;
    }
    if ((ctx = BN_CTX_new()) == NULL) {
        DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
        goto dsaerr;
    }

    BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
    if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
        DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
        goto dsaerr;
    }

    EVP_PKEY_assign_DSA(pkey, dsa);

    ret = 1;
    goto done;

 decerr:
    DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
 dsaerr:
    DSA_free(dsa);
 done:
    BN_CTX_free(ctx);
    ASN1_STRING_clear_free(privkey);
    return ret;
}

static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
{
    ASN1_STRING *params = NULL;
    ASN1_INTEGER *prkey = NULL;
    unsigned char *dp = NULL;
    int dplen;

    if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
        DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
        goto err;
    }

    params = ASN1_STRING_new();

    if (params == NULL) {
        DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
    if (params->length <= 0) {
        DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    params->type = V_ASN1_SEQUENCE;

    /* Get private key into integer */
    prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);

    if (!prkey) {
        DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
        goto err;
    }

    dplen = i2d_ASN1_INTEGER(prkey, &dp);

    ASN1_STRING_clear_free(prkey);
    prkey = NULL;

    if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
                         V_ASN1_SEQUENCE, params, dp, dplen))
        goto err;

    return 1;

 err:
    OPENSSL_free(dp);
    ASN1_STRING_free(params);
    ASN1_STRING_clear_free(prkey);
    return 0;
}

static int int_dsa_size(const EVP_PKEY *pkey)
{
    return DSA_size(pkey->pkey.dsa);
}

static int dsa_bits(const EVP_PKEY *pkey)
{
    return DSA_bits(pkey->pkey.dsa);
}

static int dsa_security_bits(const EVP_PKEY *pkey)
{
    return DSA_security_bits(pkey->pkey.dsa);
}

static int dsa_missing_parameters(const EVP_PKEY *pkey)
{
    DSA *dsa;
    dsa = pkey->pkey.dsa;
    if (dsa == NULL || dsa->p == NULL || dsa->q == NULL || dsa->g == NULL)
        return 1;
    return 0;
}

static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
{
    BIGNUM *a;

    if (to->pkey.dsa == NULL) {
        to->pkey.dsa = DSA_new();
        if (to->pkey.dsa == NULL)
            return 0;
    }

    if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
        return 0;
    BN_free(to->pkey.dsa->p);
    to->pkey.dsa->p = a;

    if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
        return 0;
    BN_free(to->pkey.dsa->q);
    to->pkey.dsa->q = a;

    if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
        return 0;
    BN_free(to->pkey.dsa->g);
    to->pkey.dsa->g = a;
    return 1;
}

static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
{
    if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
        BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
        BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
        return 0;
    else
        return 1;
}

static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
{
    if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
        return 0;
    else
        return 1;
}

static void int_dsa_free(EVP_PKEY *pkey)
{
    DSA_free(pkey->pkey.dsa);
}

static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
{
    int ret = 0;
    const char *ktype = NULL;
    const BIGNUM *priv_key, *pub_key;

    if (ptype == 2)
        priv_key = x->priv_key;
    else
        priv_key = NULL;

    if (ptype > 0)
        pub_key = x->pub_key;
    else
        pub_key = NULL;

    if (ptype == 2)
        ktype = "Private-Key";
    else if (ptype == 1)
        ktype = "Public-Key";
    else
        ktype = "DSA-Parameters";

    if (priv_key) {
        if (!BIO_indent(bp, off, 128))
            goto err;
        if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
            <= 0)
            goto err;
    }

    if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
        goto err;
    if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
        goto err;
    if (!ASN1_bn_print(bp, "P:   ", x->p, NULL, off))
        goto err;
    if (!ASN1_bn_print(bp, "Q:   ", x->q, NULL, off))
        goto err;
    if (!ASN1_bn_print(bp, "G:   ", x->g, NULL, off))
        goto err;
    ret = 1;
 err:
    return ret;
}

static int dsa_param_decode(EVP_PKEY *pkey,
                            const unsigned char **pder, int derlen)
{
    DSA *dsa;

    if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
        DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
        return 0;
    }
    EVP_PKEY_assign_DSA(pkey, dsa);
    return 1;
}

static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
{
    return i2d_DSAparams(pkey->pkey.dsa, pder);
}

static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
                           ASN1_PCTX *ctx)
{
    return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
}

static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
                         ASN1_PCTX *ctx)
{
    return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
}

static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
                          ASN1_PCTX *ctx)
{
    return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
}

static int old_dsa_priv_decode(EVP_PKEY *pkey,
                               const unsigned char **pder, int derlen)
{
    DSA *dsa;

    if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
        DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
        return 0;
    }
    EVP_PKEY_assign_DSA(pkey, dsa);
    return 1;
}

static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
{
    return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
}

static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
                         const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
{
    DSA_SIG *dsa_sig;
    const unsigned char *p;

    if (!sig) {
        if (BIO_puts(bp, "\n") <= 0)
            return 0;
        else
            return 1;
    }
    p = sig->data;
    dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
    if (dsa_sig) {
        int rv = 0;
        const BIGNUM *r, *s;

        DSA_SIG_get0(dsa_sig, &r, &s);

        if (BIO_write(bp, "\n", 1) != 1)
            goto err;

        if (!ASN1_bn_print(bp, "r:   ", r, NULL, indent))
            goto err;
        if (!ASN1_bn_print(bp, "s:   ", s, NULL, indent))
            goto err;
        rv = 1;
 err:
        DSA_SIG_free(dsa_sig);
        return rv;
    }
    return X509_signature_dump(bp, sig, indent);
}

static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
{
    switch (op) {
    case ASN1_PKEY_CTRL_PKCS7_SIGN:
        if (arg1 == 0) {
            int snid, hnid;
            X509_ALGOR *alg1, *alg2;
            PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
            if (alg1 == NULL || alg1->algorithm == NULL)
                return -1;
            hnid = OBJ_obj2nid(alg1->algorithm);
            if (hnid == NID_undef)
                return -1;
            if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
                return -1;
            X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
        }
        return 1;
#ifndef OPENSSL_NO_CMS
    case ASN1_PKEY_CTRL_CMS_SIGN:
        if (arg1 == 0) {
            int snid, hnid;
            X509_ALGOR *alg1, *alg2;
            CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
            if (alg1 == NULL || alg1->algorithm == NULL)
                return -1;
            hnid = OBJ_obj2nid(alg1->algorithm);
            if (hnid == NID_undef)
                return -1;
            if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
                return -1;
            X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
        }
        return 1;

    case ASN1_PKEY_CTRL_CMS_RI_TYPE:
        *(int *)arg2 = CMS_RECIPINFO_NONE;
        return 1;
#endif

    case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
        *(int *)arg2 = NID_sha256;
        return 2;

    default:
        return -2;

    }

}

/* NB these are sorted in pkey_id order, lowest first */

const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5] = {

    {
     EVP_PKEY_DSA2,
     EVP_PKEY_DSA,
     ASN1_PKEY_ALIAS},

    {
     EVP_PKEY_DSA1,
     EVP_PKEY_DSA,
     ASN1_PKEY_ALIAS},

    {
     EVP_PKEY_DSA4,
     EVP_PKEY_DSA,
     ASN1_PKEY_ALIAS},

    {
     EVP_PKEY_DSA3,
     EVP_PKEY_DSA,
     ASN1_PKEY_ALIAS},

    {
     EVP_PKEY_DSA,
     EVP_PKEY_DSA,
     0,

     "DSA",
     "OpenSSL DSA method",

     dsa_pub_decode,
     dsa_pub_encode,
     dsa_pub_cmp,
     dsa_pub_print,

     dsa_priv_decode,
     dsa_priv_encode,
     dsa_priv_print,

     int_dsa_size,
     dsa_bits,
     dsa_security_bits,

     dsa_param_decode,
     dsa_param_encode,
     dsa_missing_parameters,
     dsa_copy_parameters,
     dsa_cmp_parameters,
     dsa_param_print,
     dsa_sig_print,

     int_dsa_free,
     dsa_pkey_ctrl,
     old_dsa_priv_decode,
     old_dsa_priv_encode}
};
Commit	Line	Data
0f113f3e	1	/*
d2e9e320	2	* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
448be743	3	*
3cdbea65	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
d2e9e320 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
448be743 DSH	8	*/
	9
	10	#include <stdio.h>
b39fc560	11	#include "internal/cryptlib.h"
448be743 DSH	12	#include <openssl/x509.h>
448be743 DSH	13	#include <openssl/asn1.h>
1258396d	14	#include "dsa_locl.h"
1e26a8ba	15	#include <openssl/bn.h>
3c27208f	16	#include <openssl/cms.h>
5fe736e5	17	#include "internal/asn1_int.h"
3aeb9348	18	#include "internal/evp_int.h"
448be743 DSH	19
448be743 DSH	20	static int dsa_pub_decode(EVP_PKEY pkey, X509_PUBKEY pubkey)
0f113f3e MC	21	{
	22	const unsigned char p, pm;
	23	int pklen, pmlen;
	24	int ptype;
ac4e2577 DSH	25	const void *pval;
ac4e2577 DSH	26	const ASN1_STRING *pstr;
0f113f3e MC	27	X509_ALGOR *palg;
	28	ASN1_INTEGER *public_key = NULL;
	29
	30	DSA *dsa = NULL;
	31
	32	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
	33	return 0;
	34	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
	35
	36	if (ptype == V_ASN1_SEQUENCE) {
	37	pstr = pval;
	38	pm = pstr->data;
	39	pmlen = pstr->length;
	40
75ebbd9a	41	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
0f113f3e MC	42	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
	43	goto err;
	44	}
	45
	46	} else if ((ptype == V_ASN1_NULL) \|\| (ptype == V_ASN1_UNDEF)) {
75ebbd9a	47	if ((dsa = DSA_new()) == NULL) {
0f113f3e MC	48	DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
	49	goto err;
	50	}
	51	} else {
	52	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
	53	goto err;
	54	}
	55
75ebbd9a	56	if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
0f113f3e MC	57	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
	58	goto err;
	59	}
	60
75ebbd9a	61	if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
0f113f3e MC	62	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
	63	goto err;
	64	}
	65
	66	ASN1_INTEGER_free(public_key);
	67	EVP_PKEY_assign_DSA(pkey, dsa);
	68	return 1;
	69
	70	err:
2ace7450	71	ASN1_INTEGER_free(public_key);
d6407083	72	DSA_free(dsa);
0f113f3e MC	73	return 0;
	74
	75	}
448be743	76
6f81892e	77	static int dsa_pub_encode(X509_PUBKEY pk, const EVP_PKEY pkey)
0f113f3e MC	78	{
0f113f3e MC	79	DSA *dsa;
0f113f3e MC	80	int ptype;
	81	unsigned char *penc = NULL;
	82	int penclen;
0c7ca403	83	ASN1_STRING *str = NULL;
ea6b07b5	84	ASN1_INTEGER *pubint = NULL;
7760384b	85	ASN1_OBJECT *aobj;
0f113f3e MC	86
	87	dsa = pkey->pkey.dsa;
	88	if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
0f113f3e	89	str = ASN1_STRING_new();
90945fa3	90	if (str == NULL) {
0c7ca403 MC	91	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	92	goto err;
	93	}
0f113f3e MC	94	str->length = i2d_DSAparams(dsa, &str->data);
	95	if (str->length <= 0) {
	96	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	97	goto err;
	98	}
0f113f3e MC	99	ptype = V_ASN1_SEQUENCE;
	100	} else
	101	ptype = V_ASN1_UNDEF;
	102
ea6b07b5	103	pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
0f113f3e	104
ea6b07b5 DSH	105	if (pubint == NULL) {
	106	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	107	goto err;
	108	}
	109
	110	penclen = i2d_ASN1_INTEGER(pubint, &penc);
	111	ASN1_INTEGER_free(pubint);
0f113f3e MC	112
	113	if (penclen <= 0) {
	114	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	115	goto err;
	116	}
	117
7760384b PK	118	aobj = OBJ_nid2obj(EVP_PKEY_DSA);
	119	if (aobj == NULL)
	120	goto err;
	121
	122	if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
0f113f3e MC	123	return 1;
	124
	125	err:
b548a1f1	126	OPENSSL_free(penc);
0dfb9398	127	ASN1_STRING_free(str);
0f113f3e MC	128
	129	return 0;
	130	}
	131
	132	/*
	133	* In PKCS#8 DSA: you just get a private key integer and parameters in the
448be743 DSH	134	* AlgorithmIdentifier the pubkey must be recalculated.
448be743 DSH	135	*/
0f113f3e	136
245c6bc3	137	static int dsa_priv_decode(EVP_PKEY pkey, const PKCS8_PRIV_KEY_INFO p8)
0f113f3e	138	{
dfb10af9	139	const unsigned char p, pm;
0f113f3e MC	140	int pklen, pmlen;
0f113f3e MC	141	int ptype;
ac4e2577 DSH	142	const void *pval;
ac4e2577 DSH	143	const ASN1_STRING *pstr;
245c6bc3	144	const X509_ALGOR *palg;
0f113f3e MC	145	ASN1_INTEGER *privkey = NULL;
	146	BN_CTX *ctx = NULL;
	147
0f113f3e MC	148	DSA *dsa = NULL;
0f113f3e MC	149
ab4a81f6 DSH	150	int ret = 0;
ab4a81f6 DSH	151
0f113f3e MC	152	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
	153	return 0;
	154	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
	155
ab4a81f6 DSH	156	if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
ab4a81f6 DSH	157	goto decerr;
dfb10af9	158	if (privkey->type == V_ASN1_NEG_INTEGER \|\| ptype != V_ASN1_SEQUENCE)
ab4a81f6	159	goto decerr;
0f113f3e MC	160
	161	pstr = pval;
	162	pm = pstr->data;
	163	pmlen = pstr->length;
75ebbd9a	164	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
0f113f3e MC	165	goto decerr;
0f113f3e MC	166	/* We have parameters now set private key */
74924dcb RS	167	if ((dsa->priv_key = BN_secure_new()) == NULL
74924dcb RS	168	\|\| !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
0f113f3e MC	169	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
	170	goto dsaerr;
	171	}
	172	/* Calculate public key */
75ebbd9a	173	if ((dsa->pub_key = BN_new()) == NULL) {
0f113f3e MC	174	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
	175	goto dsaerr;
	176	}
75ebbd9a	177	if ((ctx = BN_CTX_new()) == NULL) {
0f113f3e MC	178	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
	179	goto dsaerr;
	180	}
	181
6364475a	182	BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
0f113f3e MC	183	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
	184	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
	185	goto dsaerr;
	186	}
	187
	188	EVP_PKEY_assign_DSA(pkey, dsa);
0f113f3e	189
ab4a81f6 DSH	190	ret = 1;
ab4a81f6 DSH	191	goto done;
0f113f3e MC	192
0f113f3e MC	193	decerr:
f6fb7f18	194	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
0f113f3e	195	dsaerr:
ab4a81f6 DSH	196	DSA_free(dsa);
ab4a81f6 DSH	197	done:
0f113f3e	198	BN_CTX_free(ctx);
2ace7450	199	ASN1_STRING_clear_free(privkey);
ab4a81f6	200	return ret;
0f113f3e	201	}
448be743	202
6f81892e	203	static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO p8, const EVP_PKEY pkey)
448be743	204	{
0f113f3e MC	205	ASN1_STRING *params = NULL;
	206	ASN1_INTEGER *prkey = NULL;
	207	unsigned char *dp = NULL;
	208	int dplen;
	209
	210	if (!pkey->pkey.dsa \|\| !pkey->pkey.dsa->priv_key) {
	211	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
	212	goto err;
	213	}
	214
	215	params = ASN1_STRING_new();
	216
90945fa3	217	if (params == NULL) {
0f113f3e MC	218	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
	219	goto err;
	220	}
	221
	222	params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
	223	if (params->length <= 0) {
	224	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
	225	goto err;
	226	}
	227	params->type = V_ASN1_SEQUENCE;
	228
	229	/* Get private key into integer */
	230	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
	231
	232	if (!prkey) {
	233	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
	234	goto err;
	235	}
	236
	237	dplen = i2d_ASN1_INTEGER(prkey, &dp);
	238
a8ae0891	239	ASN1_STRING_clear_free(prkey);
fa4629b6	240	prkey = NULL;
0f113f3e MC	241
	242	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
	243	V_ASN1_SEQUENCE, params, dp, dplen))
	244	goto err;
	245
	246	return 1;
	247
	248	err:
b548a1f1	249	OPENSSL_free(dp);
0dfb9398	250	ASN1_STRING_free(params);
2ace7450	251	ASN1_STRING_clear_free(prkey);
0f113f3e	252	return 0;
448be743 DSH	253	}
448be743 DSH	254
6f81892e	255	static int int_dsa_size(const EVP_PKEY *pkey)
0f113f3e	256	{
26a7d938	257	return DSA_size(pkey->pkey.dsa);
0f113f3e	258	}
6f81892e DSH	259
6f81892e DSH	260	static int dsa_bits(const EVP_PKEY *pkey)
0f113f3e	261	{
5d8d9a8e	262	return DSA_bits(pkey->pkey.dsa);
0f113f3e	263	}
6f81892e	264
2514fa79	265	static int dsa_security_bits(const EVP_PKEY *pkey)
0f113f3e MC	266	{
	267	return DSA_security_bits(pkey->pkey.dsa);
	268	}
2514fa79	269
6f81892e	270	static int dsa_missing_parameters(const EVP_PKEY *pkey)
0f113f3e MC	271	{
	272	DSA *dsa;
	273	dsa = pkey->pkey.dsa;
f72f00d4	274	if (dsa == NULL \|\| dsa->p == NULL \|\| dsa->q == NULL \|\| dsa->g == NULL)
0f113f3e MC	275	return 1;
	276	return 0;
	277	}
6f81892e DSH	278
6f81892e DSH	279	static int dsa_copy_parameters(EVP_PKEY to, const EVP_PKEY from)
0f113f3e MC	280	{
	281	BIGNUM *a;
	282
2986ecdc DSH	283	if (to->pkey.dsa == NULL) {
	284	to->pkey.dsa = DSA_new();
	285	if (to->pkey.dsa == NULL)
	286	return 0;
	287	}
	288
0f113f3e MC	289	if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
0f113f3e MC	290	return 0;
23a1d5e9	291	BN_free(to->pkey.dsa->p);
0f113f3e MC	292	to->pkey.dsa->p = a;
	293
	294	if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
	295	return 0;
23a1d5e9	296	BN_free(to->pkey.dsa->q);
0f113f3e MC	297	to->pkey.dsa->q = a;
	298
	299	if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
	300	return 0;
23a1d5e9	301	BN_free(to->pkey.dsa->g);
0f113f3e MC	302	to->pkey.dsa->g = a;
	303	return 1;
	304	}
6f81892e DSH	305
6f81892e DSH	306	static int dsa_cmp_parameters(const EVP_PKEY a, const EVP_PKEY b)
0f113f3e MC	307	{
	308	if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) \|\|
	309	BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) \|\|
	310	BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
	311	return 0;
	312	else
	313	return 1;
	314	}
6f81892e	315
0cb8499b	316	static int dsa_pub_cmp(const EVP_PKEY a, const EVP_PKEY b)
0f113f3e MC	317	{
	318	if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
	319	return 0;
	320	else
	321	return 1;
	322	}
0cb8499b	323
6f81892e	324	static void int_dsa_free(EVP_PKEY *pkey)
0f113f3e MC	325	{
	326	DSA_free(pkey->pkey.dsa);
	327	}
6f81892e	328
777c47ac	329	static int do_dsa_print(BIO bp, const DSA x, int off, int ptype)
0f113f3e	330	{
0f113f3e	331	int ret = 0;
0f113f3e	332	const char *ktype = NULL;
0f113f3e MC	333	const BIGNUM priv_key, pub_key;
	334
	335	if (ptype == 2)
	336	priv_key = x->priv_key;
	337	else
	338	priv_key = NULL;
	339
	340	if (ptype > 0)
	341	pub_key = x->pub_key;
	342	else
	343	pub_key = NULL;
	344
	345	if (ptype == 2)
	346	ktype = "Private-Key";
	347	else if (ptype == 1)
	348	ktype = "Public-Key";
	349	else
	350	ktype = "DSA-Parameters";
	351
0f113f3e MC	352	if (priv_key) {
	353	if (!BIO_indent(bp, off, 128))
	354	goto err;
	355	if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
	356	<= 0)
	357	goto err;
	358	}
	359
a773b52a	360	if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
0f113f3e	361	goto err;
a773b52a	362	if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
0f113f3e	363	goto err;
a773b52a	364	if (!ASN1_bn_print(bp, "P: ", x->p, NULL, off))
0f113f3e	365	goto err;
a773b52a	366	if (!ASN1_bn_print(bp, "Q: ", x->q, NULL, off))
0f113f3e	367	goto err;
a773b52a	368	if (!ASN1_bn_print(bp, "G: ", x->g, NULL, off))
0f113f3e MC	369	goto err;
	370	ret = 1;
	371	err:
26a7d938	372	return ret;
0f113f3e	373	}
35208f36	374
3e4585c8	375	static int dsa_param_decode(EVP_PKEY *pkey,
0f113f3e MC	376	const unsigned char **pder, int derlen)
	377	{
	378	DSA *dsa;
75ebbd9a RS	379
75ebbd9a RS	380	if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
0f113f3e MC	381	DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
	382	return 0;
	383	}
	384	EVP_PKEY_assign_DSA(pkey, dsa);
	385	return 1;
	386	}
3e4585c8 DSH	387
3e4585c8 DSH	388	static int dsa_param_encode(const EVP_PKEY pkey, unsigned char *pder)
0f113f3e MC	389	{
	390	return i2d_DSAparams(pkey->pkey.dsa, pder);
	391	}
35208f36 DSH	392
35208f36 DSH	393	static int dsa_param_print(BIO bp, const EVP_PKEY pkey, int indent,
0f113f3e MC	394	ASN1_PCTX *ctx)
	395	{
	396	return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
	397	}
35208f36 DSH	398
35208f36 DSH	399	static int dsa_pub_print(BIO bp, const EVP_PKEY pkey, int indent,
0f113f3e MC	400	ASN1_PCTX *ctx)
	401	{
	402	return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
	403	}
35208f36 DSH	404
35208f36 DSH	405	static int dsa_priv_print(BIO bp, const EVP_PKEY pkey, int indent,
0f113f3e MC	406	ASN1_PCTX *ctx)
	407	{
	408	return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
	409	}
35208f36	410
e4263314	411	static int old_dsa_priv_decode(EVP_PKEY *pkey,
0f113f3e MC	412	const unsigned char **pder, int derlen)
	413	{
	414	DSA *dsa;
75ebbd9a RS	415
75ebbd9a RS	416	if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
0f113f3e MC	417	DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
	418	return 0;
	419	}
	420	EVP_PKEY_assign_DSA(pkey, dsa);
	421	return 1;
	422	}
e4263314 DSH	423
e4263314 DSH	424	static int old_dsa_priv_encode(const EVP_PKEY pkey, unsigned char *pder)
0f113f3e MC	425	{
	426	return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
	427	}
e4263314	428
fa1ba589	429	static int dsa_sig_print(BIO bp, const X509_ALGOR sigalg,
0f113f3e MC	430	const ASN1_STRING sig, int indent, ASN1_PCTX pctx)
	431	{
	432	DSA_SIG *dsa_sig;
	433	const unsigned char *p;
a773b52a	434
0f113f3e MC	435	if (!sig) {
	436	if (BIO_puts(bp, "\n") <= 0)
	437	return 0;
	438	else
	439	return 1;
	440	}
	441	p = sig->data;
	442	dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
	443	if (dsa_sig) {
	444	int rv = 0;
9267c11b	445	const BIGNUM r, s;
706a13f1	446
9267c11b	447	DSA_SIG_get0(dsa_sig, &r, &s);
0f113f3e MC	448
	449	if (BIO_write(bp, "\n", 1) != 1)
	450	goto err;
	451
706a13f1	452	if (!ASN1_bn_print(bp, "r: ", r, NULL, indent))
0f113f3e	453	goto err;
706a13f1	454	if (!ASN1_bn_print(bp, "s: ", s, NULL, indent))
0f113f3e MC	455	goto err;
	456	rv = 1;
	457	err:
0f113f3e MC	458	DSA_SIG_free(dsa_sig);
	459	return rv;
	460	}
	461	return X509_signature_dump(bp, sig, indent);
	462	}
fa1ba589	463
492a9e24	464	static int dsa_pkey_ctrl(EVP_PKEY pkey, int op, long arg1, void arg2)
0f113f3e MC	465	{
	466	switch (op) {
	467	case ASN1_PKEY_CTRL_PKCS7_SIGN:
	468	if (arg1 == 0) {
	469	int snid, hnid;
	470	X509_ALGOR alg1, alg2;
	471	PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
	472	if (alg1 == NULL \|\| alg1->algorithm == NULL)
	473	return -1;
	474	hnid = OBJ_obj2nid(alg1->algorithm);
	475	if (hnid == NID_undef)
	476	return -1;
	477	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
	478	return -1;
	479	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
	480	}
	481	return 1;
8931b30d	482	#ifndef OPENSSL_NO_CMS
0f113f3e MC	483	case ASN1_PKEY_CTRL_CMS_SIGN:
	484	if (arg1 == 0) {
	485	int snid, hnid;
	486	X509_ALGOR alg1, alg2;
	487	CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
	488	if (alg1 == NULL \|\| alg1->algorithm == NULL)
	489	return -1;
	490	hnid = OBJ_obj2nid(alg1->algorithm);
	491	if (hnid == NID_undef)
	492	return -1;
	493	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
	494	return -1;
	495	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
	496	}
	497	return 1;
	498
	499	case ASN1_PKEY_CTRL_CMS_RI_TYPE:
	500	(int )arg2 = CMS_RECIPINFO_NONE;
	501	return 1;
8931b30d	502	#endif
492a9e24	503
0f113f3e MC	504	case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
	505	(int )arg2 = NID_sha256;
	506	return 2;
03919683	507
0f113f3e MC	508	default:
0f113f3e MC	509	return -2;
492a9e24	510
0f113f3e	511	}
492a9e24	512
0f113f3e	513	}
492a9e24	514
448be743 DSH	515	/* NB these are sorted in pkey_id order, lowest first */
448be743 DSH	516
578b5514	517	const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5] = {
0f113f3e MC	518
	519	{
	520	EVP_PKEY_DSA2,
	521	EVP_PKEY_DSA,
	522	ASN1_PKEY_ALIAS},
	523
	524	{
	525	EVP_PKEY_DSA1,
	526	EVP_PKEY_DSA,
	527	ASN1_PKEY_ALIAS},
	528
	529	{
	530	EVP_PKEY_DSA4,
	531	EVP_PKEY_DSA,
	532	ASN1_PKEY_ALIAS},
	533
	534	{
	535	EVP_PKEY_DSA3,
	536	EVP_PKEY_DSA,
	537	ASN1_PKEY_ALIAS},
	538
	539	{
	540	EVP_PKEY_DSA,
	541	EVP_PKEY_DSA,
	542	0,
	543
	544	"DSA",
	545	"OpenSSL DSA method",
	546
	547	dsa_pub_decode,
	548	dsa_pub_encode,
	549	dsa_pub_cmp,
	550	dsa_pub_print,
	551
	552	dsa_priv_decode,
	553	dsa_priv_encode,
	554	dsa_priv_print,
	555
	556	int_dsa_size,
	557	dsa_bits,
	558	dsa_security_bits,
	559
	560	dsa_param_decode,
	561	dsa_param_encode,
	562	dsa_missing_parameters,
	563	dsa_copy_parameters,
	564	dsa_cmp_parameters,
	565	dsa_param_print,
	566	dsa_sig_print,
	567
	568	int_dsa_free,
	569	dsa_pkey_ctrl,
	570	old_dsa_priv_decode,
	571	old_dsa_priv_encode}
	572	};