/src/openssl36/crypto/pem/pem_pkey.c

Source
/*
 * Copyright 1995-2025 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
 */

/*
 * We need to use some deprecated APIs
 */
#include "internal/deprecated.h"

#include <stdio.h>
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pkcs12.h>
#include <openssl/pem.h>
#include <openssl/engine.h>
#include <openssl/dh.h>
#include <openssl/decoder.h>
#include <openssl/ui.h>
#include "internal/cryptlib.h"
#include "internal/passphrase.h"
#include "crypto/asn1.h"
#include "crypto/x509.h"
#include "crypto/evp.h"
#include "pem_local.h"

int ossl_pem_check_suffix(const char *pem_str, const char *suffix);

static EVP_PKEY *pem_read_bio_key_decoder(BIO *bp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx,
    const char *propq,
    int selection)
{
    EVP_PKEY *pkey = NULL;
    OSSL_DECODER_CTX *dctx = NULL;
    int pos, newpos;

    if ((pos = BIO_tell(bp)) < 0)
        /* We can depend on BIO_tell() thanks to the BIO_f_readbuffer() */
        return NULL;

    dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "PEM", NULL, NULL,
        selection, libctx, propq);

    if (dctx == NULL)
        return NULL;

    if (cb == NULL)
        cb = PEM_def_callback;

    if (!OSSL_DECODER_CTX_set_pem_password_cb(dctx, cb, u))
        goto err;

    ERR_set_mark();
    while (!OSSL_DECODER_from_bio(dctx, bp) || pkey == NULL)
        if (BIO_eof(bp) != 0 || (newpos = BIO_tell(bp)) < 0 || newpos <= pos) {
            ERR_clear_last_mark();
            goto err;
        } else {
            if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_UNSUPPORTED) {
                /* unsupported PEM data, try again */
                ERR_pop_to_mark();
                ERR_set_mark();
            } else {
                /* other error, bail out */
                ERR_clear_last_mark();
                goto err;
            }
            pos = newpos;
        }
    ERR_pop_to_mark();

    /* if we were asked for private key, the public key is optional */
    if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
        selection = selection & ~OSSL_KEYMGMT_SELECT_PUBLIC_KEY;

    if (!evp_keymgmt_util_has(pkey, selection)) {
        EVP_PKEY_free(pkey);
        pkey = NULL;
        ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
        goto err;
    }

    if (x != NULL) {
        EVP_PKEY_free(*x);
        *x = pkey;
    }

err:
    OSSL_DECODER_CTX_free(dctx);
    return pkey;
}

static EVP_PKEY *pem_read_bio_key_legacy(BIO *bp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx,
    const char *propq,
    int selection)
{
    char *nm = NULL;
    const unsigned char *p = NULL;
    unsigned char *data = NULL;
    long len;
    int slen;
    EVP_PKEY *ret = NULL;

    ERR_set_mark(); /* not interested in PEM read errors */
    if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
        if (!PEM_bytes_read_bio_secmem(&data, &len, &nm,
                PEM_STRING_EVP_PKEY,
                bp, cb, u)) {
            ERR_pop_to_mark();
            return NULL;
        }
    } else {
        const char *pem_string = PEM_STRING_PARAMETERS;

        if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
            pem_string = PEM_STRING_PUBLIC;
        if (!PEM_bytes_read_bio(&data, &len, &nm,
                pem_string,
                bp, cb, u)) {
            ERR_pop_to_mark();
            return NULL;
        }
    }
    ERR_clear_last_mark();
    p = data;

    if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
        PKCS8_PRIV_KEY_INFO *p8inf;

        if ((p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len)) == NULL)
            goto p8err;
        ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
        if (x != NULL) {
            EVP_PKEY_free(*x);
            *x = ret;
        }
        PKCS8_PRIV_KEY_INFO_free(p8inf);
    } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
        PKCS8_PRIV_KEY_INFO *p8inf;
        X509_SIG *p8;
        int klen;
        char psbuf[PEM_BUFSIZE];

        if ((p8 = d2i_X509_SIG(NULL, &p, len)) == NULL)
            goto p8err;
        if (cb != NULL)
            klen = cb(psbuf, PEM_BUFSIZE, 0, u);
        else
            klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
        if (klen < 0) {
            ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ);
            X509_SIG_free(p8);
            goto err;
        }
        p8inf = PKCS8_decrypt(p8, psbuf, klen);
        X509_SIG_free(p8);
        OPENSSL_cleanse(psbuf, klen);
        if (p8inf == NULL)
            goto p8err;
        ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
        if (x != NULL) {
            EVP_PKEY_free(*x);
            *x = ret;
        }
        PKCS8_PRIV_KEY_INFO_free(p8inf);
    } else if ((slen = ossl_pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
        const EVP_PKEY_ASN1_METHOD *ameth;
        ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
        if (ameth == NULL || ameth->old_priv_decode == NULL)
            goto p8err;
        ret = ossl_d2i_PrivateKey_legacy(ameth->pkey_id, x, &p, len, libctx,
            propq);
    } else if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) == 0
        && (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
        /* Trying legacy PUBKEY decoding only if we do not want private key. */
        ret = ossl_d2i_PUBKEY_legacy(x, &p, len);
    } else if ((selection & EVP_PKEY_KEYPAIR) == 0
        && (slen = ossl_pem_check_suffix(nm, "PARAMETERS")) > 0) {
        /* Trying legacy params decoding only if we do not want a key. */
        ret = EVP_PKEY_new();
        if (ret == NULL)
            goto err;
        if (!EVP_PKEY_set_type_str(ret, nm, slen)
            || !ret->ameth->param_decode
            || !ret->ameth->param_decode(ret, &p, len)) {
            EVP_PKEY_free(ret);
            ret = NULL;
            goto err;
        }
        if (x) {
            EVP_PKEY_free(*x);
            *x = ret;
        }
    }

p8err:
    if (ret == NULL && ERR_peek_last_error() == 0)
        /* ensure some error is reported but do not hide the real one */
        ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
err:
    OPENSSL_secure_free(nm);
    OPENSSL_secure_clear_free(data, len);
    return ret;
}

static EVP_PKEY *pem_read_bio_key(BIO *bp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx,
    const char *propq,
    int selection)
{
    EVP_PKEY *ret = NULL;
    BIO *new_bio = NULL;
    int pos;
    struct ossl_passphrase_data_st pwdata = { 0 };

    if ((pos = BIO_tell(bp)) < 0) {
        new_bio = BIO_new(BIO_f_readbuffer());
        if (new_bio == NULL)
            return NULL;
        bp = BIO_push(new_bio, bp);
        pos = BIO_tell(bp);
    }

    if (cb == NULL)
        cb = PEM_def_callback;

    if (!ossl_pw_set_pem_password_cb(&pwdata, cb, u)
        || !ossl_pw_enable_passphrase_caching(&pwdata))
        goto err;

    ERR_set_mark();
    ret = pem_read_bio_key_decoder(bp, x, ossl_pw_pem_password, &pwdata,
        libctx, propq, selection);
    if (ret == NULL
        && (BIO_seek(bp, pos) < 0
            || (ret = pem_read_bio_key_legacy(bp, x,
                    ossl_pw_pem_password, &pwdata,
                    libctx, propq,
                    selection))
                == NULL))
        ERR_clear_last_mark();
    else
        ERR_pop_to_mark();

err:
    ossl_pw_clear_passphrase_data(&pwdata);
    if (new_bio != NULL) {
        BIO_pop(new_bio);
        BIO_free(new_bio);
    }
    return ret;
}

EVP_PKEY *PEM_read_bio_PUBKEY_ex(BIO *bp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx, const char *propq)
{
    return pem_read_bio_key(bp, x, cb, u, libctx, propq,
        EVP_PKEY_PUBLIC_KEY);
}

EVP_PKEY *PEM_read_bio_PUBKEY(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
    void *u)
{
    return PEM_read_bio_PUBKEY_ex(bp, x, cb, u, NULL, NULL);
}

#ifndef OPENSSL_NO_STDIO
EVP_PKEY *PEM_read_PUBKEY_ex(FILE *fp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx, const char *propq)
{
    BIO *b;
    EVP_PKEY *ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
        return 0;
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = PEM_read_bio_PUBKEY_ex(b, x, cb, u, libctx, propq);
    BIO_free(b);
    return ret;
}

EVP_PKEY *PEM_read_PUBKEY(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
{
    return PEM_read_PUBKEY_ex(fp, x, cb, u, NULL, NULL);
}
#endif

EVP_PKEY *PEM_read_bio_PrivateKey_ex(BIO *bp, EVP_PKEY **x,
    pem_password_cb *cb, void *u,
    OSSL_LIB_CTX *libctx, const char *propq)
{
    return pem_read_bio_key(bp, x, cb, u, libctx, propq,
        /* we also want the public key, if available */
        EVP_PKEY_KEYPAIR);
}

EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
    void *u)
{
    return PEM_read_bio_PrivateKey_ex(bp, x, cb, u, NULL, NULL);
}

PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
{
    IMPLEMENT_PEM_provided_write_body_vars(pkey, PrivateKey, propq);

    IMPLEMENT_PEM_provided_write_body_pass();
    IMPLEMENT_PEM_provided_write_body_main(pkey, bio);

legacy:
    if (x != NULL && (x->ameth == NULL || x->ameth->priv_encode != NULL))
        return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
            (const char *)kstr, klen, cb, u);
    return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
}

PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
{
    return PEM_write_bio_PrivateKey_ex(out, x, enc, kstr, klen, cb, u,
        NULL, NULL);
}

/*
 * Note: there is no way to tell a provided pkey encoder to use "traditional"
 * encoding.  Therefore, if the pkey is provided, we try to take a copy
 */
int PEM_write_bio_PrivateKey_traditional(BIO *bp, const EVP_PKEY *x,
    const EVP_CIPHER *enc,
    const unsigned char *kstr, int klen,
    pem_password_cb *cb, void *u)
{
    char pem_str[80];
    EVP_PKEY *copy = NULL;
    int ret;

    if (x == NULL)
        return 0;

    if (evp_pkey_is_assigned(x)
        && evp_pkey_is_provided(x)
        && evp_pkey_copy_downgraded(&copy, x))
        x = copy;

    if (x->ameth == NULL || x->ameth->old_priv_encode == NULL) {
        ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
        EVP_PKEY_free(copy);
        return 0;
    }
    BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
    ret = PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
        pem_str, bp, x, enc, kstr, klen, cb, u);

    EVP_PKEY_free(copy);
    return ret;
}

static int no_password_cb(char *buf, int num, int rwflag, void *userdata)
{
    return -1;
}

EVP_PKEY *PEM_read_bio_Parameters_ex(BIO *bp, EVP_PKEY **x,
    OSSL_LIB_CTX *libctx, const char *propq)
{
    /*
     * PEM_read_bio_Parameters(_ex) should never ask for a password. Any attempt
     * to get a password just fails.
     */
    return pem_read_bio_key(bp, x, no_password_cb, NULL, libctx, propq,
        EVP_PKEY_KEY_PARAMETERS);
}

EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
{
    return PEM_read_bio_Parameters_ex(bp, x, NULL, NULL);
}

PEM_write_fnsig(Parameters, EVP_PKEY, BIO, write_bio)
{
    char pem_str[80];
    IMPLEMENT_PEM_provided_write_body_vars(pkey, Parameters, NULL);

    IMPLEMENT_PEM_provided_write_body_main(pkey, bio);

legacy:
    if (!x->ameth || !x->ameth->param_encode)
        return 0;

    BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
    return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
        pem_str, out, x, NULL, NULL, 0, 0, NULL);
}

#ifndef OPENSSL_NO_STDIO
EVP_PKEY *PEM_read_PrivateKey_ex(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
    void *u, OSSL_LIB_CTX *libctx,
    const char *propq)
{
    BIO *b;
    EVP_PKEY *ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {
        ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
        return 0;
    }
    BIO_set_fp(b, fp, BIO_NOCLOSE);
    ret = PEM_read_bio_PrivateKey_ex(b, x, cb, u, libctx, propq);
    BIO_free(b);
    return ret;
}

EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
    void *u)
{
    return PEM_read_PrivateKey_ex(fp, x, cb, u, NULL, NULL);
}

PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, FILE, write)
{
    BIO *b;
    int ret;

    if ((b = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
        ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
        return 0;
    }
    ret = PEM_write_bio_PrivateKey_ex(b, x, enc, kstr, klen, cb, u,
        libctx, propq);
    BIO_free(b);
    return ret;
}

PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, FILE, write)
{
    return PEM_write_PrivateKey_ex(out, x, enc, kstr, klen, cb, u, NULL, NULL);
}
#endif

Coverage Report

Created: 2025-12-31 06:58

Line	Count	Source
1		/*
2		* Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (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		/*
11		* We need to use some deprecated APIs
12		*/
13		#include "internal/deprecated.h"
14
15		#include <stdio.h>
16		#include <openssl/buffer.h>
17		#include <openssl/objects.h>
18		#include <openssl/evp.h>
19		#include <openssl/x509.h>
20		#include <openssl/pkcs12.h>
21		#include <openssl/pem.h>
22		#include <openssl/engine.h>
23		#include <openssl/dh.h>
24		#include <openssl/decoder.h>
25		#include <openssl/ui.h>
26		#include "internal/cryptlib.h"
27		#include "internal/passphrase.h"
28		#include "crypto/asn1.h"
29		#include "crypto/x509.h"
30		#include "crypto/evp.h"
31		#include "pem_local.h"
32
33		int ossl_pem_check_suffix(const char pem_str, const char suffix);
34
35		static EVP_PKEY pem_read_bio_key_decoder(BIO bp, EVP_PKEY **x,
36		pem_password_cb cb, void u,
37		OSSL_LIB_CTX *libctx,
38		const char *propq,
39		int selection)
40	124k	{
41	124k	EVP_PKEY *pkey = NULL;
42	124k	OSSL_DECODER_CTX *dctx = NULL;
43	124k	int pos, newpos;
44
45	124k	if ((pos = BIO_tell(bp)) < 0)
46		/* We can depend on BIO_tell() thanks to the BIO_f_readbuffer() */
47	0	return NULL;
48
49	124k	dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "PEM", NULL, NULL,
50	124k	selection, libctx, propq);
51
52	124k	if (dctx == NULL)
53	0	return NULL;
54
55	124k	if (cb == NULL)
56	0	cb = PEM_def_callback;
57
58	124k	if (!OSSL_DECODER_CTX_set_pem_password_cb(dctx, cb, u))
59	0	goto err;
60
61	124k	ERR_set_mark();
62	124k	while (!OSSL_DECODER_from_bio(dctx, bp) \|\| pkey == NULL)
63	0	if (BIO_eof(bp) != 0 \|\| (newpos = BIO_tell(bp)) < 0 \|\| newpos <= pos) {
64	0	ERR_clear_last_mark();
65	0	goto err;
66	0	} else {
67	0	if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_UNSUPPORTED) {
68		/* unsupported PEM data, try again */
69	0	ERR_pop_to_mark();
70	0	ERR_set_mark();
71	0	} else {
72		/* other error, bail out */
73	0	ERR_clear_last_mark();
74	0	goto err;
75	0	}
76	0	pos = newpos;
77	0	}
78	124k	ERR_pop_to_mark();
79
80		/* if we were asked for private key, the public key is optional */
81	124k	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
82	124k	selection = selection & ~OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
83
84	124k	if (!evp_keymgmt_util_has(pkey, selection)) {
85	0	EVP_PKEY_free(pkey);
86	0	pkey = NULL;
87	0	ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
88	0	goto err;
89	0	}
90
91	124k	if (x != NULL) {
92	0	EVP_PKEY_free(*x);
93	0	*x = pkey;
94	0	}
95
96	124k	err:
97	124k	OSSL_DECODER_CTX_free(dctx);
98	124k	return pkey;
99	124k	}
100
101		static EVP_PKEY pem_read_bio_key_legacy(BIO bp, EVP_PKEY **x,
102		pem_password_cb cb, void u,
103		OSSL_LIB_CTX *libctx,
104		const char *propq,
105		int selection)
106	0	{
107	0	char *nm = NULL;
108	0	const unsigned char *p = NULL;
109	0	unsigned char *data = NULL;
110	0	long len;
111	0	int slen;
112	0	EVP_PKEY *ret = NULL;
113
114	0	ERR_set_mark(); /* not interested in PEM read errors */
115	0	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
116	0	if (!PEM_bytes_read_bio_secmem(&data, &len, &nm,
117	0	PEM_STRING_EVP_PKEY,
118	0	bp, cb, u)) {
119	0	ERR_pop_to_mark();
120	0	return NULL;
121	0	}
122	0	} else {
123	0	const char *pem_string = PEM_STRING_PARAMETERS;
124
125	0	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
126	0	pem_string = PEM_STRING_PUBLIC;
127	0	if (!PEM_bytes_read_bio(&data, &len, &nm,
128	0	pem_string,
129	0	bp, cb, u)) {
130	0	ERR_pop_to_mark();
131	0	return NULL;
132	0	}
133	0	}
134	0	ERR_clear_last_mark();
135	0	p = data;
136
137	0	if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
138	0	PKCS8_PRIV_KEY_INFO *p8inf;
139
140	0	if ((p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len)) == NULL)
141	0	goto p8err;
142	0	ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
143	0	if (x != NULL) {
144	0	EVP_PKEY_free(*x);
145	0	*x = ret;
146	0	}
147	0	PKCS8_PRIV_KEY_INFO_free(p8inf);
148	0	} else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
149	0	PKCS8_PRIV_KEY_INFO *p8inf;
150	0	X509_SIG *p8;
151	0	int klen;
152	0	char psbuf[PEM_BUFSIZE];
153
154	0	if ((p8 = d2i_X509_SIG(NULL, &p, len)) == NULL)
155	0	goto p8err;
156	0	if (cb != NULL)
157	0	klen = cb(psbuf, PEM_BUFSIZE, 0, u);
158	0	else
159	0	klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
160	0	if (klen < 0) {
161	0	ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ);
162	0	X509_SIG_free(p8);
163	0	goto err;
164	0	}
165	0	p8inf = PKCS8_decrypt(p8, psbuf, klen);
166	0	X509_SIG_free(p8);
167	0	OPENSSL_cleanse(psbuf, klen);
168	0	if (p8inf == NULL)
169	0	goto p8err;
170	0	ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
171	0	if (x != NULL) {
172	0	EVP_PKEY_free(*x);
173	0	*x = ret;
174	0	}
175	0	PKCS8_PRIV_KEY_INFO_free(p8inf);
176	0	} else if ((slen = ossl_pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
177	0	const EVP_PKEY_ASN1_METHOD *ameth;
178	0	ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
179	0	if (ameth == NULL \|\| ameth->old_priv_decode == NULL)
180	0	goto p8err;
181	0	ret = ossl_d2i_PrivateKey_legacy(ameth->pkey_id, x, &p, len, libctx,
182	0	propq);
183	0	} else if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) == 0
184	0	&& (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
185		/* Trying legacy PUBKEY decoding only if we do not want private key. */
186	0	ret = ossl_d2i_PUBKEY_legacy(x, &p, len);
187	0	} else if ((selection & EVP_PKEY_KEYPAIR) == 0
188	0	&& (slen = ossl_pem_check_suffix(nm, "PARAMETERS")) > 0) {
189		/* Trying legacy params decoding only if we do not want a key. */
190	0	ret = EVP_PKEY_new();
191	0	if (ret == NULL)
192	0	goto err;
193	0	if (!EVP_PKEY_set_type_str(ret, nm, slen)
194	0	\|\| !ret->ameth->param_decode
195	0	\|\| !ret->ameth->param_decode(ret, &p, len)) {
196	0	EVP_PKEY_free(ret);
197	0	ret = NULL;
198	0	goto err;
199	0	}
200	0	if (x) {
201	0	EVP_PKEY_free(*x);
202	0	*x = ret;
203	0	}
204	0	}
205
206	0	p8err:
207	0	if (ret == NULL && ERR_peek_last_error() == 0)
208		/* ensure some error is reported but do not hide the real one */
209	0	ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
210	0	err:
211	0	OPENSSL_secure_free(nm);
212	0	OPENSSL_secure_clear_free(data, len);
213	0	return ret;
214	0	}
215
216		static EVP_PKEY pem_read_bio_key(BIO bp, EVP_PKEY **x,
217		pem_password_cb cb, void u,
218		OSSL_LIB_CTX *libctx,
219		const char *propq,
220		int selection)
221	124k	{
222	124k	EVP_PKEY *ret = NULL;
223	124k	BIO *new_bio = NULL;
224	124k	int pos;
225	124k	struct ossl_passphrase_data_st pwdata = { 0 };
226
227	124k	if ((pos = BIO_tell(bp)) < 0) {
228	0	new_bio = BIO_new(BIO_f_readbuffer());
229	0	if (new_bio == NULL)
230	0	return NULL;
231	0	bp = BIO_push(new_bio, bp);
232	0	pos = BIO_tell(bp);
233	0	}
234
235	124k	if (cb == NULL)
236	124k	cb = PEM_def_callback;
237
238	124k	if (!ossl_pw_set_pem_password_cb(&pwdata, cb, u)
239	124k	\|\| !ossl_pw_enable_passphrase_caching(&pwdata))
240	0	goto err;
241
242	124k	ERR_set_mark();
243	124k	ret = pem_read_bio_key_decoder(bp, x, ossl_pw_pem_password, &pwdata,
244	124k	libctx, propq, selection);
245	124k	if (ret == NULL
246	0	&& (BIO_seek(bp, pos) < 0
247	0	\|\| (ret = pem_read_bio_key_legacy(bp, x,
248	0	ossl_pw_pem_password, &pwdata,
249	0	libctx, propq,
250	0	selection))
251	0	== NULL))
252	0	ERR_clear_last_mark();
253	124k	else
254	124k	ERR_pop_to_mark();
255
256	124k	err:
257	124k	ossl_pw_clear_passphrase_data(&pwdata);
258	124k	if (new_bio != NULL) {
259	0	BIO_pop(new_bio);
260	0	BIO_free(new_bio);
261	0	}
262	124k	return ret;
263	124k	}
264
265		EVP_PKEY PEM_read_bio_PUBKEY_ex(BIO bp, EVP_PKEY **x,
266		pem_password_cb cb, void u,
267		OSSL_LIB_CTX libctx, const char propq)
268	0	{
269	0	return pem_read_bio_key(bp, x, cb, u, libctx, propq,
270	0	EVP_PKEY_PUBLIC_KEY);
271	0	}
272
273		EVP_PKEY PEM_read_bio_PUBKEY(BIO bp, EVP_PKEY *x, pem_password_cb cb,
274		void *u)
275	0	{
276	0	return PEM_read_bio_PUBKEY_ex(bp, x, cb, u, NULL, NULL);
277	0	}
278
279		#ifndef OPENSSL_NO_STDIO
280		EVP_PKEY PEM_read_PUBKEY_ex(FILE fp, EVP_PKEY **x,
281		pem_password_cb cb, void u,
282		OSSL_LIB_CTX libctx, const char propq)
283	0	{
284	0	BIO *b;
285	0	EVP_PKEY *ret;
286
287	0	if ((b = BIO_new(BIO_s_file())) == NULL) {
288	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
289	0	return 0;
290	0	}
291	0	BIO_set_fp(b, fp, BIO_NOCLOSE);
292	0	ret = PEM_read_bio_PUBKEY_ex(b, x, cb, u, libctx, propq);
293	0	BIO_free(b);
294	0	return ret;
295	0	}
296
297		EVP_PKEY PEM_read_PUBKEY(FILE fp, EVP_PKEY *x, pem_password_cb cb, void *u)
298	0	{
299	0	return PEM_read_PUBKEY_ex(fp, x, cb, u, NULL, NULL);
300	0	}
301		#endif
302
303		EVP_PKEY PEM_read_bio_PrivateKey_ex(BIO bp, EVP_PKEY **x,
304		pem_password_cb cb, void u,
305		OSSL_LIB_CTX libctx, const char propq)
306	124k	{
307	124k	return pem_read_bio_key(bp, x, cb, u, libctx, propq,
308		/* we also want the public key, if available */
309	124k	EVP_PKEY_KEYPAIR);
310	124k	}
311
312		EVP_PKEY PEM_read_bio_PrivateKey(BIO bp, EVP_PKEY *x, pem_password_cb cb,
313		void *u)
314	124k	{
315	124k	return PEM_read_bio_PrivateKey_ex(bp, x, cb, u, NULL, NULL);
316	124k	}
317
318		PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
319	0	{
320	0	IMPLEMENT_PEM_provided_write_body_vars(pkey, PrivateKey, propq);
321
322	0	IMPLEMENT_PEM_provided_write_body_pass();
323	0	IMPLEMENT_PEM_provided_write_body_main(pkey, bio);
324
325	0	legacy:
326	0	if (x != NULL && (x->ameth == NULL \|\| x->ameth->priv_encode != NULL))
327	0	return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
328	0	(const char *)kstr, klen, cb, u);
329	0	return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
330	0	}
331
332		PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
333	0	{
334	0	return PEM_write_bio_PrivateKey_ex(out, x, enc, kstr, klen, cb, u,
335	0	NULL, NULL);
336	0	}
337
338		/*
339		* Note: there is no way to tell a provided pkey encoder to use "traditional"
340		* encoding. Therefore, if the pkey is provided, we try to take a copy
341		*/
342		int PEM_write_bio_PrivateKey_traditional(BIO bp, const EVP_PKEY x,
343		const EVP_CIPHER *enc,
344		const unsigned char *kstr, int klen,
345		pem_password_cb cb, void u)
346	0	{
347	0	char pem_str[80];
348	0	EVP_PKEY *copy = NULL;
349	0	int ret;
350
351	0	if (x == NULL)
352	0	return 0;
353
354	0	if (evp_pkey_is_assigned(x)
355	0	&& evp_pkey_is_provided(x)
356	0	&& evp_pkey_copy_downgraded(&copy, x))
357	0	x = copy;
358
359	0	if (x->ameth == NULL \|\| x->ameth->old_priv_encode == NULL) {
360	0	ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
361	0	EVP_PKEY_free(copy);
362	0	return 0;
363	0	}
364	0	BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
365	0	ret = PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
366	0	pem_str, bp, x, enc, kstr, klen, cb, u);
367
368	0	EVP_PKEY_free(copy);
369	0	return ret;
370	0	}
371
372		static int no_password_cb(char buf, int num, int rwflag, void userdata)
373	0	{
374	0	return -1;
375	0	}
376
377		EVP_PKEY PEM_read_bio_Parameters_ex(BIO bp, EVP_PKEY **x,
378		OSSL_LIB_CTX libctx, const char propq)
379	0	{
380		/*
381		* PEM_read_bio_Parameters(_ex) should never ask for a password. Any attempt
382		* to get a password just fails.
383		*/
384	0	return pem_read_bio_key(bp, x, no_password_cb, NULL, libctx, propq,
385	0	EVP_PKEY_KEY_PARAMETERS);
386	0	}
387
388		EVP_PKEY PEM_read_bio_Parameters(BIO bp, EVP_PKEY **x)
389	0	{
390	0	return PEM_read_bio_Parameters_ex(bp, x, NULL, NULL);
391	0	}
392
393		PEM_write_fnsig(Parameters, EVP_PKEY, BIO, write_bio)
394	0	{
395	0	char pem_str[80];
396	0	IMPLEMENT_PEM_provided_write_body_vars(pkey, Parameters, NULL);
397
398	0	IMPLEMENT_PEM_provided_write_body_main(pkey, bio);
399
400	0	legacy:
401	0	if (!x->ameth \|\| !x->ameth->param_encode)
402	0	return 0;
403
404	0	BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
405	0	return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
406	0	pem_str, out, x, NULL, NULL, 0, 0, NULL);
407	0	}
408
409		#ifndef OPENSSL_NO_STDIO
410		EVP_PKEY PEM_read_PrivateKey_ex(FILE fp, EVP_PKEY *x, pem_password_cb cb,
411		void u, OSSL_LIB_CTX libctx,
412		const char *propq)
413	0	{
414	0	BIO *b;
415	0	EVP_PKEY *ret;
416
417	0	if ((b = BIO_new(BIO_s_file())) == NULL) {
418	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
419	0	return 0;
420	0	}
421	0	BIO_set_fp(b, fp, BIO_NOCLOSE);
422	0	ret = PEM_read_bio_PrivateKey_ex(b, x, cb, u, libctx, propq);
423	0	BIO_free(b);
424	0	return ret;
425	0	}
426
427		EVP_PKEY PEM_read_PrivateKey(FILE fp, EVP_PKEY *x, pem_password_cb cb,
428		void *u)
429	0	{
430	0	return PEM_read_PrivateKey_ex(fp, x, cb, u, NULL, NULL);
431	0	}
432
433		PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, FILE, write)
434	0	{
435	0	BIO *b;
436	0	int ret;
437
438	0	if ((b = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
439	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
440	0	return 0;
441	0	}
442	0	ret = PEM_write_bio_PrivateKey_ex(b, x, enc, kstr, klen, cb, u,
443	0	libctx, propq);
444	0	BIO_free(b);
445	0	return ret;
446	0	}
447
448		PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, FILE, write)
449	0	{
450	0	return PEM_write_PrivateKey_ex(out, x, enc, kstr, klen, cb, u, NULL, NULL);
451	0	}
452		#endif