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openssl/crypto/pem/pem_lib.c
Rich Salz 4b45c6e52b free cleanup almost the finale 
Add OPENSSL_clear_free which merges cleanse and free.
(Names was picked to be similar to BN_clear_free, etc.)
Removed OPENSSL_freeFunc macro.
Fixed the small simple ones that are left:
        CRYPTO_free CRYPTO_free_locked OPENSSL_free_locked

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-04-30 17:57:32 -04:00

858 lines
24 KiB
C
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/* crypto/pem/pem_lib.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <ctype.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include "internal/asn1_int.h"
#ifndef OPENSSL_NO_DES
# include <openssl/des.h>
#endif
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT;
#define MIN_LENGTH 4
static int load_iv(char **fromp, unsigned char *to, int num);
static int check_pem(const char *nm, const char *name);
int pem_check_suffix(const char *pem_str, const char *suffix);
int PEM_def_callback(char *buf, int num, int w, void *key)
{
#ifdef OPENSSL_NO_STDIO
/*
* We should not ever call the default callback routine from windows.
*/
PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return (-1);
#else
int i, j;
const char *prompt;
if (key) {
i = strlen(key);
i = (i > num) ? num : i;
memcpy(buf, key, i);
return (i);
}
prompt = EVP_get_pw_prompt();
if (prompt == NULL)
prompt = "Enter PEM pass phrase:";
for (;;) {
i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
if (i != 0) {
PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
memset(buf, 0, (unsigned int)num);
return (-1);
}
j = strlen(buf);
if (j < MIN_LENGTH) {
fprintf(stderr,
"phrase is too short, needs to be at least %d chars\n",
MIN_LENGTH);
} else
break;
}
return (j);
#endif
}
void PEM_proc_type(char *buf, int type)
{
const char *str;
if (type == PEM_TYPE_ENCRYPTED)
str = "ENCRYPTED";
else if (type == PEM_TYPE_MIC_CLEAR)
str = "MIC-CLEAR";
else if (type == PEM_TYPE_MIC_ONLY)
str = "MIC-ONLY";
else
str = "BAD-TYPE";
BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
BUF_strlcat(buf, str, PEM_BUFSIZE);
BUF_strlcat(buf, "\n", PEM_BUFSIZE);
}
void PEM_dek_info(char *buf, const char *type, int len, char *str)
{
static const unsigned char map[17] = "0123456789ABCDEF";
long i;
int j;
BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
BUF_strlcat(buf, type, PEM_BUFSIZE);
BUF_strlcat(buf, ",", PEM_BUFSIZE);
j = strlen(buf);
if (j + (len * 2) + 1 > PEM_BUFSIZE)
return;
for (i = 0; i < len; i++) {
buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
}
buf[j + i * 2] = '\n';
buf[j + i * 2 + 1] = '\0';
}
#ifndef OPENSSL_NO_STDIO
void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
pem_password_cb *cb, void *u)
{
BIO *b;
void *ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
return (0);
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
BIO_free(b);
return (ret);
}
#endif
static int check_pem(const char *nm, const char *name)
{
/* Normal matching nm and name */
if (!strcmp(nm, name))
return 1;
/* Make PEM_STRING_EVP_PKEY match any private key */
if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
if (!strcmp(nm, PEM_STRING_PKCS8))
return 1;
if (!strcmp(nm, PEM_STRING_PKCS8INF))
return 1;
slen = pem_check_suffix(nm, "PRIVATE KEY");
if (slen > 0) {
/*
* NB: ENGINE implementations wont contain a deprecated old
* private key decode function so don't look for them.
*/
ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
if (ameth && ameth->old_priv_decode)
return 1;
}
return 0;
}
if (!strcmp(name, PEM_STRING_PARAMETERS)) {
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
slen = pem_check_suffix(nm, "PARAMETERS");
if (slen > 0) {
ENGINE *e;
ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
if (ameth) {
int r;
if (ameth->param_decode)
r = 1;
else
r = 0;
#ifndef OPENSSL_NO_ENGINE
if (e)
ENGINE_finish(e);
#endif
return r;
}
}
return 0;
}
/* If reading DH parameters handle X9.42 DH format too */
if (!strcmp(nm, PEM_STRING_DHXPARAMS) &&
!strcmp(name, PEM_STRING_DHPARAMS))
return 1;
/* Permit older strings */
if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509))
return 1;
if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
!strcmp(name, PEM_STRING_X509_REQ))
return 1;
/* Allow normal certs to be read as trusted certs */
if (!strcmp(nm, PEM_STRING_X509) &&
!strcmp(name, PEM_STRING_X509_TRUSTED))
return 1;
if (!strcmp(nm, PEM_STRING_X509_OLD) &&
!strcmp(name, PEM_STRING_X509_TRUSTED))
return 1;
/* Some CAs use PKCS#7 with CERTIFICATE headers */
if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7))
return 1;
if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
!strcmp(name, PEM_STRING_PKCS7))
return 1;
#ifndef OPENSSL_NO_CMS
if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS))
return 1;
/* Allow CMS to be read from PKCS#7 headers */
if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS))
return 1;
#endif
return 0;
}
int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
const char *name, BIO *bp, pem_password_cb *cb,
void *u)
{
EVP_CIPHER_INFO cipher;
char *nm = NULL, *header = NULL;
unsigned char *data = NULL;
long len;
int ret = 0;
for (;;) {
if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
ERR_add_error_data(2, "Expecting: ", name);
return 0;
}
if (check_pem(nm, name))
break;
OPENSSL_free(nm);
OPENSSL_free(header);
OPENSSL_free(data);
}
if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
goto err;
if (!PEM_do_header(&cipher, data, &len, cb, u))
goto err;
*pdata = data;
*plen = len;
if (pnm)
*pnm = nm;
ret = 1;
err:
if (!ret || !pnm)
OPENSSL_free(nm);
OPENSSL_free(header);
if (!ret)
OPENSSL_free(data);
return ret;
}
#ifndef OPENSSL_NO_STDIO
int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
void *x, const EVP_CIPHER *enc, unsigned char *kstr,
int klen, pem_password_cb *callback, void *u)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
return (0);
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
BIO_free(b);
return (ret);
}
#endif
int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
void *x, const EVP_CIPHER *enc, unsigned char *kstr,
int klen, pem_password_cb *callback, void *u)
{
EVP_CIPHER_CTX ctx;
int dsize = 0, i, j, ret = 0;
unsigned char *p, *data = NULL;
const char *objstr = NULL;
char buf[PEM_BUFSIZE];
unsigned char key[EVP_MAX_KEY_LENGTH];
unsigned char iv[EVP_MAX_IV_LENGTH];
if (enc != NULL) {
objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
if (objstr == NULL) {
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
goto err;
}
}
if ((dsize = i2d(x, NULL)) < 0) {
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
dsize = 0;
goto err;
}
/* dzise + 8 bytes are needed */
/* actually it needs the cipher block size extra... */
data = OPENSSL_malloc((unsigned int)dsize + 20);
if (data == NULL) {
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
p = data;
i = i2d(x, &p);
if (enc != NULL) {
if (kstr == NULL) {
if (callback == NULL)
klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
else
klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
if (klen <= 0) {
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
goto err;
}
#ifdef CHARSET_EBCDIC
/* Convert the pass phrase from EBCDIC */
ebcdic2ascii(buf, buf, klen);
#endif
kstr = (unsigned char *)buf;
}
RAND_add(data, i, 0); /* put in the RSA key. */
OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
if (RAND_bytes(iv, enc->iv_len) <= 0) /* Generate a salt */
goto err;
/*
* The 'iv' is used as the iv and as a salt. It is NOT taken from
* the BytesToKey function
*/
if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
goto err;
if (kstr == (unsigned char *)buf)
OPENSSL_cleanse(buf, PEM_BUFSIZE);
OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
sizeof buf);
buf[0] = '\0';
PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
/* k=strlen(buf); */
EVP_CIPHER_CTX_init(&ctx);
ret = 1;
if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv)
|| !EVP_EncryptUpdate(&ctx, data, &j, data, i)
|| !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
ret = 0;
EVP_CIPHER_CTX_cleanup(&ctx);
if (ret == 0)
goto err;
i += j;
} else {
ret = 1;
buf[0] = '\0';
}
i = PEM_write_bio(bp, name, buf, data, i);
if (i <= 0)
ret = 0;
err:
OPENSSL_cleanse(key, sizeof(key));
OPENSSL_cleanse(iv, sizeof(iv));
OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
OPENSSL_cleanse(buf, PEM_BUFSIZE);
OPENSSL_clear_free(data, (unsigned int)dsize);
return (ret);
}
int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
pem_password_cb *callback, void *u)
{
int i = 0, j, o, klen;
long len;
EVP_CIPHER_CTX ctx;
unsigned char key[EVP_MAX_KEY_LENGTH];
char buf[PEM_BUFSIZE];
len = *plen;
if (cipher->cipher == NULL)
return (1);
if (callback == NULL)
klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
else
klen = callback(buf, PEM_BUFSIZE, 0, u);
if (klen <= 0) {
PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
return (0);
}
#ifdef CHARSET_EBCDIC
/* Convert the pass phrase from EBCDIC */
ebcdic2ascii(buf, buf, klen);
#endif
if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
(unsigned char *)buf, klen, 1, key, NULL))
return 0;
j = (int)len;
EVP_CIPHER_CTX_init(&ctx);
o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
if (o)
o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
if (o)
o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
EVP_CIPHER_CTX_cleanup(&ctx);
OPENSSL_cleanse((char *)buf, sizeof(buf));
OPENSSL_cleanse((char *)key, sizeof(key));
if (o)
j += i;
else {
PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
return (0);
}
*plen = j;
return (1);
}
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
{
const EVP_CIPHER *enc = NULL;
char *p, c;
char **header_pp = &header;
cipher->cipher = NULL;
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
return (1);
if (strncmp(header, "Proc-Type: ", 11) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
return (0);
}
header += 11;
if (*header != '4')
return (0);
header++;
if (*header != ',')
return (0);
header++;
if (strncmp(header, "ENCRYPTED", 9) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
return (0);
}
for (; (*header != '\n') && (*header != '\0'); header++) ;
if (*header == '\0') {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
return (0);
}
header++;
if (strncmp(header, "DEK-Info: ", 10) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
return (0);
}
header += 10;
p = header;
for (;;) {
c = *header;
#ifndef CHARSET_EBCDIC
if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') ||
((c >= '0') && (c <= '9'))))
break;
#else
if (!(isupper(c) || (c == '-') || isdigit(c)))
break;
#endif
header++;
}
*header = '\0';
cipher->cipher = enc = EVP_get_cipherbyname(p);
*header = c;
header++;
if (enc == NULL) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
return (0);
}
if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
return (0);
return (1);
}
static int load_iv(char **fromp, unsigned char *to, int num)
{
int v, i;
char *from;
from = *fromp;
for (i = 0; i < num; i++)
to[i] = 0;
num *= 2;
for (i = 0; i < num; i++) {
if ((*from >= '0') && (*from <= '9'))
v = *from - '0';
else if ((*from >= 'A') && (*from <= 'F'))
v = *from - 'A' + 10;
else if ((*from >= 'a') && (*from <= 'f'))
v = *from - 'a' + 10;
else {
PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
return (0);
}
from++;
to[i / 2] |= v << (long)((!(i & 1)) * 4);
}
*fromp = from;
return (1);
}
#ifndef OPENSSL_NO_STDIO
int PEM_write(FILE *fp, const char *name, const char *header,
const unsigned char *data, long len)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
return (0);
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = PEM_write_bio(b, name, header, data, len);
BIO_free(b);
return (ret);
}
#endif
int PEM_write_bio(BIO *bp, const char *name, const char *header,
const unsigned char *data, long len)
{
int nlen, n, i, j, outl;
unsigned char *buf = NULL;
EVP_ENCODE_CTX ctx;
int reason = ERR_R_BUF_LIB;
EVP_EncodeInit(&ctx);
nlen = strlen(name);
if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
(BIO_write(bp, name, nlen) != nlen) ||
(BIO_write(bp, "-----\n", 6) != 6))
goto err;
i = strlen(header);
if (i > 0) {
if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
goto err;
}
buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
if (buf == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
i = j = 0;
while (len > 0) {
n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
goto err;
i += outl;
len -= n;
j += n;
}
EVP_EncodeFinal(&ctx, buf, &outl);
if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
goto err;
OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
buf = NULL;
if ((BIO_write(bp, "-----END ", 9) != 9) ||
(BIO_write(bp, name, nlen) != nlen) ||
(BIO_write(bp, "-----\n", 6) != 6))
goto err;
return (i + outl);
err:
OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
PEMerr(PEM_F_PEM_WRITE_BIO, reason);
return (0);
}
#ifndef OPENSSL_NO_STDIO
int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
long *len)
{
BIO *b;
int ret;
if ((b = BIO_new(BIO_s_file())) == NULL) {
PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
return (0);
}
BIO_set_fp(b, fp, BIO_NOCLOSE);
ret = PEM_read_bio(b, name, header, data, len);
BIO_free(b);
return (ret);
}
#endif
int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
long *len)
{
EVP_ENCODE_CTX ctx;
int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
char buf[256];
BUF_MEM *nameB;
BUF_MEM *headerB;
BUF_MEM *dataB, *tmpB;
nameB = BUF_MEM_new();
headerB = BUF_MEM_new();
dataB = BUF_MEM_new();
if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
return (0);
}
buf[254] = '\0';
for (;;) {
i = BIO_gets(bp, buf, 254);
if (i <= 0) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
goto err;
}
while ((i >= 0) && (buf[i] <= ' '))
i--;
buf[++i] = '\n';
buf[++i] = '\0';
if (strncmp(buf, "-----BEGIN ", 11) == 0) {
i = strlen(&(buf[11]));
if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
continue;
if (!BUF_MEM_grow(nameB, i + 9)) {
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
memcpy(nameB->data, &(buf[11]), i - 6);
nameB->data[i - 6] = '\0';
break;
}
}
hl = 0;
if (!BUF_MEM_grow(headerB, 256)) {
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
headerB->data[0] = '\0';
for (;;) {
i = BIO_gets(bp, buf, 254);
if (i <= 0)
break;
while ((i >= 0) && (buf[i] <= ' '))
i--;
buf[++i] = '\n';
buf[++i] = '\0';
if (buf[0] == '\n')
break;
if (!BUF_MEM_grow(headerB, hl + i + 9)) {
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
if (strncmp(buf, "-----END ", 9) == 0) {
nohead = 1;
break;
}
memcpy(&(headerB->data[hl]), buf, i);
headerB->data[hl + i] = '\0';
hl += i;
}
bl = 0;
if (!BUF_MEM_grow(dataB, 1024)) {
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
dataB->data[0] = '\0';
if (!nohead) {
for (;;) {
i = BIO_gets(bp, buf, 254);
if (i <= 0)
break;
while ((i >= 0) && (buf[i] <= ' '))
i--;
buf[++i] = '\n';
buf[++i] = '\0';
if (i != 65)
end = 1;
if (strncmp(buf, "-----END ", 9) == 0)
break;
if (i > 65)
break;
if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
goto err;
}
memcpy(&(dataB->data[bl]), buf, i);
dataB->data[bl + i] = '\0';
bl += i;
if (end) {
buf[0] = '\0';
i = BIO_gets(bp, buf, 254);
if (i <= 0)
break;
while ((i >= 0) && (buf[i] <= ' '))
i--;
buf[++i] = '\n';
buf[++i] = '\0';
break;
}
}
} else {
tmpB = headerB;
headerB = dataB;
dataB = tmpB;
bl = hl;
}
i = strlen(nameB->data);
if ((strncmp(buf, "-----END ", 9) != 0) ||
(strncmp(nameB->data, &(buf[9]), i) != 0) ||
(strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE);
goto err;
}
EVP_DecodeInit(&ctx);
i = EVP_DecodeUpdate(&ctx,
(unsigned char *)dataB->data, &bl,
(unsigned char *)dataB->data, bl);
if (i < 0) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
goto err;
}
i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
if (i < 0) {
PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
goto err;
}
bl += k;
if (bl == 0)
goto err;
*name = nameB->data;
*header = headerB->data;
*data = (unsigned char *)dataB->data;
*len = bl;
OPENSSL_free(nameB);
OPENSSL_free(headerB);
OPENSSL_free(dataB);
return (1);
err:
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
return (0);
}
/*
* Check pem string and return prefix length. If for example the pem_str ==
* "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
* string "RSA".
*/
int pem_check_suffix(const char *pem_str, const char *suffix)
{
int pem_len = strlen(pem_str);
int suffix_len = strlen(suffix);
const char *p;
if (suffix_len + 1 >= pem_len)
return 0;
p = pem_str + pem_len - suffix_len;
if (strcmp(p, suffix))
return 0;
p--;
if (*p != ' ')
return 0;
return p - pem_str;
}
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