/src/openssl111/crypto/dsa/dsa_ameth.c

Source (jump to first uncovered line)
/*
 * Copyright 2006-2019 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 "internal/cryptlib.h"
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include "dsa_local.h"
#include <openssl/bn.h>
#include <openssl/cms.h>
#include "crypto/asn1.h"
#include "crypto/evp.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 1;

    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}
};

Coverage Report

Created: 2023-09-25 06:42

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved.
3		*
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
8		*/
9
10		#include <stdio.h>
11		#include "internal/cryptlib.h"
12		#include <openssl/x509.h>
13		#include <openssl/asn1.h>
14		#include "dsa_local.h"
15		#include <openssl/bn.h>
16		#include <openssl/cms.h>
17		#include "crypto/asn1.h"
18		#include "crypto/evp.h"
19
20		static int dsa_pub_decode(EVP_PKEY pkey, X509_PUBKEY pubkey)
21	4.53k	{
22	4.53k	const unsigned char p, pm;
23	4.53k	int pklen, pmlen;
24	4.53k	int ptype;
25	4.53k	const void *pval;
26	4.53k	const ASN1_STRING *pstr;
27	4.53k	X509_ALGOR *palg;
28	4.53k	ASN1_INTEGER *public_key = NULL;
29
30	4.53k	DSA *dsa = NULL;
31
32	4.53k	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
33	0	return 0;
34	4.53k	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
35
36	4.53k	if (ptype == V_ASN1_SEQUENCE) {
37	2.98k	pstr = pval;
38	2.98k	pm = pstr->data;
39	2.98k	pmlen = pstr->length;
40
41	2.98k	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
42	2.27k	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
43	2.27k	goto err;
44	2.27k	}
45
46	2.98k	} else if ((ptype == V_ASN1_NULL) \|\| (ptype == V_ASN1_UNDEF)) {
47	1.44k	if ((dsa = DSA_new()) == NULL) {
48	0	DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
49	0	goto err;
50	0	}
51	1.44k	} else {
52	107	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
53	107	goto err;
54	107	}
55
56	2.15k	if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
57	1.33k	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
58	1.33k	goto err;
59	1.33k	}
60
61	823	if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
62	0	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
63	0	goto err;
64	0	}
65
66	823	ASN1_INTEGER_free(public_key);
67	823	EVP_PKEY_assign_DSA(pkey, dsa);
68	823	return 1;
69
70	3.71k	err:
71	3.71k	ASN1_INTEGER_free(public_key);
72	3.71k	DSA_free(dsa);
73	3.71k	return 0;
74
75	823	}
76
77		static int dsa_pub_encode(X509_PUBKEY pk, const EVP_PKEY pkey)
78	0	{
79	0	DSA *dsa;
80	0	int ptype;
81	0	unsigned char *penc = NULL;
82	0	int penclen;
83	0	ASN1_STRING *str = NULL;
84	0	ASN1_INTEGER *pubint = NULL;
85	0	ASN1_OBJECT *aobj;
86
87	0	dsa = pkey->pkey.dsa;
88	0	if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
89	0	str = ASN1_STRING_new();
90	0	if (str == NULL) {
91	0	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
92	0	goto err;
93	0	}
94	0	str->length = i2d_DSAparams(dsa, &str->data);
95	0	if (str->length <= 0) {
96	0	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
97	0	goto err;
98	0	}
99	0	ptype = V_ASN1_SEQUENCE;
100	0	} else
101	0	ptype = V_ASN1_UNDEF;
102
103	0	pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
104
105	0	if (pubint == NULL) {
106	0	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
107	0	goto err;
108	0	}
109
110	0	penclen = i2d_ASN1_INTEGER(pubint, &penc);
111	0	ASN1_INTEGER_free(pubint);
112
113	0	if (penclen <= 0) {
114	0	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
115	0	goto err;
116	0	}
117
118	0	aobj = OBJ_nid2obj(EVP_PKEY_DSA);
119	0	if (aobj == NULL)
120	0	goto err;
121
122	0	if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
123	0	return 1;
124
125	0	err:
126	0	OPENSSL_free(penc);
127	0	ASN1_STRING_free(str);
128
129	0	return 0;
130	0	}
131
132		/*
133		* In PKCS#8 DSA: you just get a private key integer and parameters in the
134		* AlgorithmIdentifier the pubkey must be recalculated.
135		*/
136
137		static int dsa_priv_decode(EVP_PKEY pkey, const PKCS8_PRIV_KEY_INFO p8)
138	153	{
139	153	const unsigned char p, pm;
140	153	int pklen, pmlen;
141	153	int ptype;
142	153	const void *pval;
143	153	const ASN1_STRING *pstr;
144	153	const X509_ALGOR *palg;
145	153	ASN1_INTEGER *privkey = NULL;
146	153	BN_CTX *ctx = NULL;
147
148	153	DSA *dsa = NULL;
149
150	153	int ret = 0;
151
152	153	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
153	0	return 0;
154	153	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
155
156	153	if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
157	1	goto decerr;
158	152	if (privkey->type == V_ASN1_NEG_INTEGER \|\| ptype != V_ASN1_SEQUENCE)
159	3	goto decerr;
160
161	149	pstr = pval;
162	149	pm = pstr->data;
163	149	pmlen = pstr->length;
164	149	if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
165	1	goto decerr;
166		/* We have parameters now set private key */
167	148	if ((dsa->priv_key = BN_secure_new()) == NULL
168	148	\|\| !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
169	0	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
170	0	goto dsaerr;
171	0	}
172		/* Calculate public key */
173	148	if ((dsa->pub_key = BN_new()) == NULL) {
174	0	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
175	0	goto dsaerr;
176	0	}
177	148	if ((ctx = BN_CTX_new()) == NULL) {
178	0	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
179	0	goto dsaerr;
180	0	}
181
182	148	BN_set_flags(dsa->priv_key, BN_FLG_CONSTTIME);
183	148	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
184	1	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
185	1	goto dsaerr;
186	1	}
187
188	147	EVP_PKEY_assign_DSA(pkey, dsa);
189
190	147	ret = 1;
191	147	goto done;
192
193	5	decerr:
194	5	DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
195	6	dsaerr:
196	6	DSA_free(dsa);
197	153	done:
198	153	BN_CTX_free(ctx);
199	153	ASN1_STRING_clear_free(privkey);
200	153	return ret;
201	6	}
202
203		static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO p8, const EVP_PKEY pkey)
204	0	{
205	0	ASN1_STRING *params = NULL;
206	0	ASN1_INTEGER *prkey = NULL;
207	0	unsigned char *dp = NULL;
208	0	int dplen;
209
210	0	if (!pkey->pkey.dsa \|\| !pkey->pkey.dsa->priv_key) {
211	0	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
212	0	goto err;
213	0	}
214
215	0	params = ASN1_STRING_new();
216
217	0	if (params == NULL) {
218	0	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
219	0	goto err;
220	0	}
221
222	0	params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
223	0	if (params->length <= 0) {
224	0	DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
225	0	goto err;
226	0	}
227	0	params->type = V_ASN1_SEQUENCE;
228
229		/* Get private key into integer */
230	0	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
231
232	0	if (!prkey) {
233	0	DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
234	0	goto err;
235	0	}
236
237	0	dplen = i2d_ASN1_INTEGER(prkey, &dp);
238
239	0	ASN1_STRING_clear_free(prkey);
240	0	prkey = NULL;
241
242	0	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
243	0	V_ASN1_SEQUENCE, params, dp, dplen))
244	0	goto err;
245
246	0	return 1;
247
248	0	err:
249	0	OPENSSL_free(dp);
250	0	ASN1_STRING_free(params);
251	0	ASN1_STRING_clear_free(prkey);
252	0	return 0;
253	0	}
254
255		static int int_dsa_size(const EVP_PKEY *pkey)
256	0	{
257	0	return DSA_size(pkey->pkey.dsa);
258	0	}
259
260		static int dsa_bits(const EVP_PKEY *pkey)
261	0	{
262	0	return DSA_bits(pkey->pkey.dsa);
263	0	}
264
265		static int dsa_security_bits(const EVP_PKEY *pkey)
266	0	{
267	0	return DSA_security_bits(pkey->pkey.dsa);
268	0	}
269
270		static int dsa_missing_parameters(const EVP_PKEY *pkey)
271	0	{
272	0	DSA *dsa;
273	0	dsa = pkey->pkey.dsa;
274	0	if (dsa == NULL \|\| dsa->p == NULL \|\| dsa->q == NULL \|\| dsa->g == NULL)
275	0	return 1;
276	0	return 0;
277	0	}
278
279		static int dsa_copy_parameters(EVP_PKEY to, const EVP_PKEY from)
280	0	{
281	0	BIGNUM *a;
282
283	0	if (to->pkey.dsa == NULL) {
284	0	to->pkey.dsa = DSA_new();
285	0	if (to->pkey.dsa == NULL)
286	0	return 0;
287	0	}
288
289	0	if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
290	0	return 0;
291	0	BN_free(to->pkey.dsa->p);
292	0	to->pkey.dsa->p = a;
293
294	0	if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
295	0	return 0;
296	0	BN_free(to->pkey.dsa->q);
297	0	to->pkey.dsa->q = a;
298
299	0	if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
300	0	return 0;
301	0	BN_free(to->pkey.dsa->g);
302	0	to->pkey.dsa->g = a;
303	0	return 1;
304	0	}
305
306		static int dsa_cmp_parameters(const EVP_PKEY a, const EVP_PKEY b)
307	0	{
308	0	if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) \|\|
309	0	BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) \|\|
310	0	BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
311	0	return 0;
312	0	else
313	0	return 1;
314	0	}
315
316		static int dsa_pub_cmp(const EVP_PKEY a, const EVP_PKEY b)
317	0	{
318	0	if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
319	0	return 0;
320	0	else
321	0	return 1;
322	0	}
323
324		static void int_dsa_free(EVP_PKEY *pkey)
325	5.19k	{
326	5.19k	DSA_free(pkey->pkey.dsa);
327	5.19k	}
328
329		static int do_dsa_print(BIO bp, const DSA x, int off, int ptype)
330	253	{
331	253	int ret = 0;
332	253	const char *ktype = NULL;
333	253	const BIGNUM priv_key, pub_key;
334
335	253	if (ptype == 2)
336	172	priv_key = x->priv_key;
337	81	else
338	81	priv_key = NULL;
339
340	253	if (ptype > 0)
341	172	pub_key = x->pub_key;
342	81	else
343	81	pub_key = NULL;
344
345	253	if (ptype == 2)
346	172	ktype = "Private-Key";
347	81	else if (ptype == 1)
348	0	ktype = "Public-Key";
349	81	else
350	81	ktype = "DSA-Parameters";
351
352	253	if (priv_key) {
353	164	if (!BIO_indent(bp, off, 128))
354	0	goto err;
355	164	if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
356	164	<= 0)
357	0	goto err;
358	164	}
359
360	253	if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
361	0	goto err;
362	253	if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
363	0	goto err;
364	253	if (!ASN1_bn_print(bp, "P: ", x->p, NULL, off))
365	0	goto err;
366	253	if (!ASN1_bn_print(bp, "Q: ", x->q, NULL, off))
367	0	goto err;
368	253	if (!ASN1_bn_print(bp, "G: ", x->g, NULL, off))
369	0	goto err;
370	253	ret = 1;
371	253	err:
372	253	return ret;
373	253	}
374
375		static int dsa_param_decode(EVP_PKEY *pkey,
376		const unsigned char **pder, int derlen)
377	0	{
378	0	DSA *dsa;
379
380	0	if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
381	0	DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
382	0	return 0;
383	0	}
384	0	EVP_PKEY_assign_DSA(pkey, dsa);
385	0	return 1;
386	0	}
387
388		static int dsa_param_encode(const EVP_PKEY pkey, unsigned char *pder)
389	0	{
390	0	return i2d_DSAparams(pkey->pkey.dsa, pder);
391	0	}
392
393		static int dsa_param_print(BIO bp, const EVP_PKEY pkey, int indent,
394		ASN1_PCTX *ctx)
395	81	{
396	81	return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
397	81	}
398
399		static int dsa_pub_print(BIO bp, const EVP_PKEY pkey, int indent,
400		ASN1_PCTX *ctx)
401	0	{
402	0	return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
403	0	}
404
405		static int dsa_priv_print(BIO bp, const EVP_PKEY pkey, int indent,
406		ASN1_PCTX *ctx)
407	172	{
408	172	return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
409	172	}
410
411		static int old_dsa_priv_decode(EVP_PKEY *pkey,
412		const unsigned char **pder, int derlen)
413	395	{
414	395	DSA *dsa;
415
416	395	if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
417	392	DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
418	392	return 0;
419	392	}
420	3	EVP_PKEY_assign_DSA(pkey, dsa);
421	3	return 1;
422	395	}
423
424		static int old_dsa_priv_encode(const EVP_PKEY pkey, unsigned char *pder)
425	150	{
426	150	return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
427	150	}
428
429		static int dsa_sig_print(BIO bp, const X509_ALGOR sigalg,
430		const ASN1_STRING sig, int indent, ASN1_PCTX pctx)
431	0	{
432	0	DSA_SIG *dsa_sig;
433	0	const unsigned char *p;
434
435	0	if (!sig) {
436	0	if (BIO_puts(bp, "\n") <= 0)
437	0	return 0;
438	0	else
439	0	return 1;
440	0	}
441	0	p = sig->data;
442	0	dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
443	0	if (dsa_sig) {
444	0	int rv = 0;
445	0	const BIGNUM r, s;
446
447	0	DSA_SIG_get0(dsa_sig, &r, &s);
448
449	0	if (BIO_write(bp, "\n", 1) != 1)
450	0	goto err;
451
452	0	if (!ASN1_bn_print(bp, "r: ", r, NULL, indent))
453	0	goto err;
454	0	if (!ASN1_bn_print(bp, "s: ", s, NULL, indent))
455	0	goto err;
456	0	rv = 1;
457	0	err:
458	0	DSA_SIG_free(dsa_sig);
459	0	return rv;
460	0	}
461	0	return X509_signature_dump(bp, sig, indent);
462	0	}
463
464		static int dsa_pkey_ctrl(EVP_PKEY pkey, int op, long arg1, void arg2)
465	0	{
466	0	switch (op) {
467	0	case ASN1_PKEY_CTRL_PKCS7_SIGN:
468	0	if (arg1 == 0) {
469	0	int snid, hnid;
470	0	X509_ALGOR alg1, alg2;
471	0	PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
472	0	if (alg1 == NULL \|\| alg1->algorithm == NULL)
473	0	return -1;
474	0	hnid = OBJ_obj2nid(alg1->algorithm);
475	0	if (hnid == NID_undef)
476	0	return -1;
477	0	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
478	0	return -1;
479	0	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
480	0	}
481	0	return 1;
482	0	#ifndef OPENSSL_NO_CMS
483	0	case ASN1_PKEY_CTRL_CMS_SIGN:
484	0	if (arg1 == 0) {
485	0	int snid, hnid;
486	0	X509_ALGOR alg1, alg2;
487	0	CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
488	0	if (alg1 == NULL \|\| alg1->algorithm == NULL)
489	0	return -1;
490	0	hnid = OBJ_obj2nid(alg1->algorithm);
491	0	if (hnid == NID_undef)
492	0	return -1;
493	0	if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
494	0	return -1;
495	0	X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
496	0	}
497	0	return 1;
498
499	0	case ASN1_PKEY_CTRL_CMS_RI_TYPE:
500	0	(int )arg2 = CMS_RECIPINFO_NONE;
501	0	return 1;
502	0	#endif
503
504	0	case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
505	0	(int )arg2 = NID_sha256;
506	0	return 1;
507
508	0	default:
509	0	return -2;
510
511	0	}
512
513	0	}
514
515		/* NB these are sorted in pkey_id order, lowest first */
516
517		const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[5] = {
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		};