/src/openssl/crypto/pem/pem_pkey.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2024 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 */
#define OPENSSL_SUPPRESS_DEPRECATED

#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: 2025-06-13 06:57

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2024 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		/* We need to use some deprecated APIs */
11		#define OPENSSL_SUPPRESS_DEPRECATED
12
13		#include <stdio.h>
14		#include <openssl/buffer.h>
15		#include <openssl/objects.h>
16		#include <openssl/evp.h>
17		#include <openssl/x509.h>
18		#include <openssl/pkcs12.h>
19		#include <openssl/pem.h>
20		#include <openssl/engine.h>
21		#include <openssl/dh.h>
22		#include <openssl/decoder.h>
23		#include <openssl/ui.h>
24		#include "internal/cryptlib.h"
25		#include "internal/passphrase.h"
26		#include "crypto/asn1.h"
27		#include "crypto/x509.h"
28		#include "crypto/evp.h"
29		#include "pem_local.h"
30
31		int ossl_pem_check_suffix(const char pem_str, const char suffix);
32
33		static EVP_PKEY pem_read_bio_key_decoder(BIO bp, EVP_PKEY **x,
34		pem_password_cb cb, void u,
35		OSSL_LIB_CTX *libctx,
36		const char *propq,
37		int selection)
38	0	{
39	0	EVP_PKEY *pkey = NULL;
40	0	OSSL_DECODER_CTX *dctx = NULL;
41	0	int pos, newpos;
42
43	0	if ((pos = BIO_tell(bp)) < 0)
44		/* We can depend on BIO_tell() thanks to the BIO_f_readbuffer() */
45	0	return NULL;
46
47	0	dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "PEM", NULL, NULL,
48	0	selection, libctx, propq);
49
50	0	if (dctx == NULL)
51	0	return NULL;
52
53	0	if (cb == NULL)
54	0	cb = PEM_def_callback;
55
56	0	if (!OSSL_DECODER_CTX_set_pem_password_cb(dctx, cb, u))
57	0	goto err;
58
59	0	ERR_set_mark();
60	0	while (!OSSL_DECODER_from_bio(dctx, bp) \|\| pkey == NULL)
61	0	if (BIO_eof(bp) != 0 \|\| (newpos = BIO_tell(bp)) < 0 \|\| newpos <= pos) {
62	0	ERR_clear_last_mark();
63	0	goto err;
64	0	} else {
65	0	if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_UNSUPPORTED) {
66		/* unsupported PEM data, try again */
67	0	ERR_pop_to_mark();
68	0	ERR_set_mark();
69	0	} else {
70		/* other error, bail out */
71	0	ERR_clear_last_mark();
72	0	goto err;
73	0	}
74	0	pos = newpos;
75	0	}
76	0	ERR_pop_to_mark();
77
78		/* if we were asked for private key, the public key is optional */
79	0	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
80	0	selection = selection & ~OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
81
82	0	if (!evp_keymgmt_util_has(pkey, selection)) {
83	0	EVP_PKEY_free(pkey);
84	0	pkey = NULL;
85	0	ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
86	0	goto err;
87	0	}
88
89	0	if (x != NULL) {
90	0	EVP_PKEY_free(*x);
91	0	*x = pkey;
92	0	}
93
94	0	err:
95	0	OSSL_DECODER_CTX_free(dctx);
96	0	return pkey;
97	0	}
98
99		static EVP_PKEY pem_read_bio_key_legacy(BIO bp, EVP_PKEY **x,
100		pem_password_cb cb, void u,
101		OSSL_LIB_CTX *libctx,
102		const char *propq,
103		int selection)
104	0	{
105	0	char *nm = NULL;
106	0	const unsigned char *p = NULL;
107	0	unsigned char *data = NULL;
108	0	long len;
109	0	int slen;
110	0	EVP_PKEY *ret = NULL;
111
112	0	ERR_set_mark(); /* not interested in PEM read errors */
113	0	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
114	0	if (!PEM_bytes_read_bio_secmem(&data, &len, &nm,
115	0	PEM_STRING_EVP_PKEY,
116	0	bp, cb, u)) {
117	0	ERR_pop_to_mark();
118	0	return NULL;
119	0	}
120	0	} else {
121	0	const char *pem_string = PEM_STRING_PARAMETERS;
122
123	0	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
124	0	pem_string = PEM_STRING_PUBLIC;
125	0	if (!PEM_bytes_read_bio(&data, &len, &nm,
126	0	pem_string,
127	0	bp, cb, u)) {
128	0	ERR_pop_to_mark();
129	0	return NULL;
130	0	}
131	0	}
132	0	ERR_clear_last_mark();
133	0	p = data;
134
135	0	if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
136	0	PKCS8_PRIV_KEY_INFO *p8inf;
137
138	0	if ((p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len)) == NULL)
139	0	goto p8err;
140	0	ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
141	0	if (x != NULL) {
142	0	EVP_PKEY_free(*x);
143	0	*x = ret;
144	0	}
145	0	PKCS8_PRIV_KEY_INFO_free(p8inf);
146	0	} else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
147	0	PKCS8_PRIV_KEY_INFO *p8inf;
148	0	X509_SIG *p8;
149	0	int klen;
150	0	char psbuf[PEM_BUFSIZE];
151
152	0	if ((p8 = d2i_X509_SIG(NULL, &p, len)) == NULL)
153	0	goto p8err;
154	0	if (cb != NULL)
155	0	klen = cb(psbuf, PEM_BUFSIZE, 0, u);
156	0	else
157	0	klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
158	0	if (klen < 0) {
159	0	ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ);
160	0	X509_SIG_free(p8);
161	0	goto err;
162	0	}
163	0	p8inf = PKCS8_decrypt(p8, psbuf, klen);
164	0	X509_SIG_free(p8);
165	0	OPENSSL_cleanse(psbuf, klen);
166	0	if (p8inf == NULL)
167	0	goto p8err;
168	0	ret = evp_pkcs82pkey_legacy(p8inf, libctx, propq);
169	0	if (x != NULL) {
170	0	EVP_PKEY_free(*x);
171	0	*x = ret;
172	0	}
173	0	PKCS8_PRIV_KEY_INFO_free(p8inf);
174	0	} else if ((slen = ossl_pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
175	0	const EVP_PKEY_ASN1_METHOD *ameth;
176	0	ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
177	0	if (ameth == NULL \|\| ameth->old_priv_decode == NULL)
178	0	goto p8err;
179	0	ret = ossl_d2i_PrivateKey_legacy(ameth->pkey_id, x, &p, len, libctx,
180	0	propq);
181	0	} else if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) == 0
182	0	&& (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
183		/* Trying legacy PUBKEY decoding only if we do not want private key. */
184	0	ret = ossl_d2i_PUBKEY_legacy(x, &p, len);
185	0	} else if ((selection & EVP_PKEY_KEYPAIR) == 0
186	0	&& (slen = ossl_pem_check_suffix(nm, "PARAMETERS")) > 0) {
187		/* Trying legacy params decoding only if we do not want a key. */
188	0	ret = EVP_PKEY_new();
189	0	if (ret == NULL)
190	0	goto err;
191	0	if (!EVP_PKEY_set_type_str(ret, nm, slen)
192	0	\|\| !ret->ameth->param_decode
193	0	\|\| !ret->ameth->param_decode(ret, &p, len)) {
194	0	EVP_PKEY_free(ret);
195	0	ret = NULL;
196	0	goto err;
197	0	}
198	0	if (x) {
199	0	EVP_PKEY_free(*x);
200	0	*x = ret;
201	0	}
202	0	}
203
204	0	p8err:
205	0	if (ret == NULL && ERR_peek_last_error() == 0)
206		/* ensure some error is reported but do not hide the real one */
207	0	ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB);
208	0	err:
209	0	OPENSSL_secure_free(nm);
210	0	OPENSSL_secure_clear_free(data, len);
211	0	return ret;
212	0	}
213
214		static EVP_PKEY pem_read_bio_key(BIO bp, EVP_PKEY **x,
215		pem_password_cb cb, void u,
216		OSSL_LIB_CTX *libctx,
217		const char *propq,
218		int selection)
219	0	{
220	0	EVP_PKEY *ret = NULL;
221	0	BIO *new_bio = NULL;
222	0	int pos;
223	0	struct ossl_passphrase_data_st pwdata = { 0 };
224
225	0	if ((pos = BIO_tell(bp)) < 0) {
226	0	new_bio = BIO_new(BIO_f_readbuffer());
227	0	if (new_bio == NULL)
228	0	return NULL;
229	0	bp = BIO_push(new_bio, bp);
230	0	pos = BIO_tell(bp);
231	0	}
232
233	0	if (cb == NULL)
234	0	cb = PEM_def_callback;
235
236	0	if (!ossl_pw_set_pem_password_cb(&pwdata, cb, u)
237	0	\|\| !ossl_pw_enable_passphrase_caching(&pwdata))
238	0	goto err;
239
240	0	ERR_set_mark();
241	0	ret = pem_read_bio_key_decoder(bp, x, ossl_pw_pem_password, &pwdata,
242	0	libctx, propq, selection);
243	0	if (ret == NULL
244	0	&& (BIO_seek(bp, pos) < 0
245	0	\|\| (ret = pem_read_bio_key_legacy(bp, x,
246	0	ossl_pw_pem_password, &pwdata,
247	0	libctx, propq,
248	0	selection)) == NULL))
249	0	ERR_clear_last_mark();
250	0	else
251	0	ERR_pop_to_mark();
252
253	0	err:
254	0	ossl_pw_clear_passphrase_data(&pwdata);
255	0	if (new_bio != NULL) {
256	0	BIO_pop(new_bio);
257	0	BIO_free(new_bio);
258	0	}
259	0	return ret;
260	0	}
261
262		EVP_PKEY PEM_read_bio_PUBKEY_ex(BIO bp, EVP_PKEY **x,
263		pem_password_cb cb, void u,
264		OSSL_LIB_CTX libctx, const char propq)
265	0	{
266	0	return pem_read_bio_key(bp, x, cb, u, libctx, propq,
267	0	EVP_PKEY_PUBLIC_KEY);
268	0	}
269
270		EVP_PKEY PEM_read_bio_PUBKEY(BIO bp, EVP_PKEY *x, pem_password_cb cb,
271		void *u)
272	0	{
273	0	return PEM_read_bio_PUBKEY_ex(bp, x, cb, u, NULL, NULL);
274	0	}
275
276		#ifndef OPENSSL_NO_STDIO
277		EVP_PKEY PEM_read_PUBKEY_ex(FILE fp, EVP_PKEY **x,
278		pem_password_cb cb, void u,
279		OSSL_LIB_CTX libctx, const char propq)
280	0	{
281	0	BIO *b;
282	0	EVP_PKEY *ret;
283
284	0	if ((b = BIO_new(BIO_s_file())) == NULL) {
285	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
286	0	return 0;
287	0	}
288	0	BIO_set_fp(b, fp, BIO_NOCLOSE);
289	0	ret = PEM_read_bio_PUBKEY_ex(b, x, cb, u, libctx, propq);
290	0	BIO_free(b);
291	0	return ret;
292	0	}
293
294		EVP_PKEY PEM_read_PUBKEY(FILE fp, EVP_PKEY *x, pem_password_cb cb, void *u)
295	0	{
296	0	return PEM_read_PUBKEY_ex(fp, x, cb, u, NULL, NULL);
297	0	}
298		#endif
299
300		EVP_PKEY PEM_read_bio_PrivateKey_ex(BIO bp, EVP_PKEY **x,
301		pem_password_cb cb, void u,
302		OSSL_LIB_CTX libctx, const char propq)
303	0	{
304	0	return pem_read_bio_key(bp, x, cb, u, libctx, propq,
305		/* we also want the public key, if available */
306	0	EVP_PKEY_KEYPAIR);
307	0	}
308
309		EVP_PKEY PEM_read_bio_PrivateKey(BIO bp, EVP_PKEY *x, pem_password_cb cb,
310		void *u)
311	0	{
312	0	return PEM_read_bio_PrivateKey_ex(bp, x, cb, u, NULL, NULL);
313	0	}
314
315		PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
316	0	{
317	0	IMPLEMENT_PEM_provided_write_body_vars(pkey, PrivateKey, propq);
318
319	0	IMPLEMENT_PEM_provided_write_body_pass();
320	0	IMPLEMENT_PEM_provided_write_body_main(pkey, bio);
321
322	0	legacy:
323	0	if (x != NULL && (x->ameth == NULL \|\| x->ameth->priv_encode != NULL))
324	0	return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
325	0	(const char *)kstr, klen, cb, u);
326	0	return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
327	0	}
328
329		PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
330	0	{
331	0	return PEM_write_bio_PrivateKey_ex(out, x, enc, kstr, klen, cb, u,
332	0	NULL, NULL);
333	0	}
334
335		/*
336		* Note: there is no way to tell a provided pkey encoder to use "traditional"
337		* encoding. Therefore, if the pkey is provided, we try to take a copy
338		*/
339		int PEM_write_bio_PrivateKey_traditional(BIO bp, const EVP_PKEY x,
340		const EVP_CIPHER *enc,
341		const unsigned char *kstr, int klen,
342		pem_password_cb cb, void u)
343	0	{
344	0	char pem_str[80];
345	0	EVP_PKEY *copy = NULL;
346	0	int ret;
347
348	0	if (x == NULL)
349	0	return 0;
350
351	0	if (evp_pkey_is_assigned(x)
352	0	&& evp_pkey_is_provided(x)
353	0	&& evp_pkey_copy_downgraded(&copy, x))
354	0	x = copy;
355
356	0	if (x->ameth == NULL \|\| x->ameth->old_priv_encode == NULL) {
357	0	ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
358	0	EVP_PKEY_free(copy);
359	0	return 0;
360	0	}
361	0	BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
362	0	ret = PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
363	0	pem_str, bp, x, enc, kstr, klen, cb, u);
364
365	0	EVP_PKEY_free(copy);
366	0	return ret;
367	0	}
368
369		static int no_password_cb(char buf, int num, int rwflag, void userdata)
370	0	{
371	0	return -1;
372	0	}
373
374		EVP_PKEY PEM_read_bio_Parameters_ex(BIO bp, EVP_PKEY **x,
375		OSSL_LIB_CTX libctx, const char propq)
376	0	{
377		/*
378		* PEM_read_bio_Parameters(_ex) should never ask for a password. Any attempt
379		* to get a password just fails.
380		*/
381	0	return pem_read_bio_key(bp, x, no_password_cb, NULL, libctx, propq,
382	0	EVP_PKEY_KEY_PARAMETERS);
383	0	}
384
385		EVP_PKEY PEM_read_bio_Parameters(BIO bp, EVP_PKEY **x)
386	0	{
387	0	return PEM_read_bio_Parameters_ex(bp, x, NULL, NULL);
388	0	}
389
390		PEM_write_fnsig(Parameters, EVP_PKEY, BIO, write_bio)
391	0	{
392	0	char pem_str[80];
393	0	IMPLEMENT_PEM_provided_write_body_vars(pkey, Parameters, NULL);
394
395	0	IMPLEMENT_PEM_provided_write_body_main(pkey, bio);
396
397	0	legacy:
398	0	if (!x->ameth \|\| !x->ameth->param_encode)
399	0	return 0;
400
401	0	BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
402	0	return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
403	0	pem_str, out, x, NULL, NULL, 0, 0, NULL);
404	0	}
405
406		#ifndef OPENSSL_NO_STDIO
407		EVP_PKEY PEM_read_PrivateKey_ex(FILE fp, EVP_PKEY *x, pem_password_cb cb,
408		void u, OSSL_LIB_CTX libctx,
409		const char *propq)
410	0	{
411	0	BIO *b;
412	0	EVP_PKEY *ret;
413
414	0	if ((b = BIO_new(BIO_s_file())) == NULL) {
415	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
416	0	return 0;
417	0	}
418	0	BIO_set_fp(b, fp, BIO_NOCLOSE);
419	0	ret = PEM_read_bio_PrivateKey_ex(b, x, cb, u, libctx, propq);
420	0	BIO_free(b);
421	0	return ret;
422	0	}
423
424		EVP_PKEY PEM_read_PrivateKey(FILE fp, EVP_PKEY *x, pem_password_cb cb,
425		void *u)
426	0	{
427	0	return PEM_read_PrivateKey_ex(fp, x, cb, u, NULL, NULL);
428	0	}
429
430		PEM_write_cb_ex_fnsig(PrivateKey, EVP_PKEY, FILE, write)
431	0	{
432	0	BIO *b;
433	0	int ret;
434
435	0	if ((b = BIO_new_fp(out, BIO_NOCLOSE)) == NULL) {
436	0	ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
437	0	return 0;
438	0	}
439	0	ret = PEM_write_bio_PrivateKey_ex(b, x, enc, kstr, klen, cb, u,
440	0	libctx, propq);
441	0	BIO_free(b);
442	0	return ret;
443	0	}
444
445		PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, FILE, write)
446	0	{
447	0	return PEM_write_PrivateKey_ex(out, x, enc, kstr, klen, cb, u, NULL, NULL);
448	0	}
449		#endif