EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
{
char *nm = NULL;
const unsigned char *p = NULL;
unsigned char *data = NULL;
long len;
int slen;
EVP_PKEY *ret = NULL;
if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
bp, 0, NULL))
return NULL;
p = data;
if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
ret = EVP_PKEY_new();
if (!ret)
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) {
if (*x)
EVP_PKEY_free((EVP_PKEY *)*x);
*x = ret;
}
}
err:
if (ret == NULL)
PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
OPENSSL_free(nm);
OPENSSL_free(data);
return (ret);
}
DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
{
char *nm = NULL;
const unsigned char *p = NULL;
unsigned char *data = NULL;
long len;
DH *ret = NULL;
if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
return NULL;
p = data;
if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)
ret = d2i_DHxparams(x, &p, len);
else
ret = d2i_DHparams(x, &p, len);
if (ret == NULL)
PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
OPENSSL_free(nm);
OPENSSL_free(data);
return ret;
}
EVP_PKEY *
d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
{
PKCS8_PRIV_KEY_INFO *p8inf = NULL;
X509_SIG *p8 = NULL;
int klen;
EVP_PKEY *ret;
char psbuf[PEM_BUFSIZE];
p8 = d2i_PKCS8_bio(bp, NULL);
if (!p8)
return NULL;
if (cb)
klen = cb(psbuf, PEM_BUFSIZE, 0, u);
else
klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
if (klen <= 0) {
PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
X509_SIG_free(p8);
return NULL;
}
p8inf = PKCS8_decrypt(p8, psbuf, klen);
X509_SIG_free(p8);
if (!p8inf)
return NULL;
ret = EVP_PKCS82PKEY(p8inf);
PKCS8_PRIV_KEY_INFO_free(p8inf);
if (!ret)
return NULL;
if (x) {
if (*x)
EVP_PKEY_free(*x);
*x = ret;
}
return ret;
}
int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, unsigned int *siglen,
EVP_PKEY *pkey)
{
unsigned char *m;
int i,ret=0;
unsigned int m_len;
m=(unsigned char *)OPENSSL_malloc(EVP_PKEY_size(pkey)+2);
if (m == NULL)
{
PEMerr(PEM_F_PEM_SIGNFINAL,ERR_R_MALLOC_FAILURE);
goto err;
}
if (EVP_SignFinal(ctx,m,&m_len,pkey) <= 0) goto err;
i=EVP_EncodeBlock(sigret,m,m_len);
*siglen=i;
ret=1;
err:
/* ctx has been zeroed by EVP_SignFinal() */
if (m != NULL) OPENSSL_free(m);
return(ret);
}
/**
* Read in PEM-formatted data from the given BIO.
*
* By nature of the PEM format, all content must be printable ASCII (except
* for line endings). Other characters are malformed input and will be rejected.
*/
int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
unsigned char **data, long *len_out, unsigned int flags)
{
EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
const BIO_METHOD *bmeth;
BIO *headerB = NULL, *dataB = NULL;
char *name = NULL;
int len, taillen, headerlen, ret = 0;
BUF_MEM * buf_mem;
if (ctx == NULL) {
PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
return 0;
}
*len_out = 0;
*name_out = *header = NULL;
*data = NULL;
if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
/* These two are mutually incompatible; bail out. */
PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
goto end;
}
bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
headerB = BIO_new(bmeth);
dataB = BIO_new(bmeth);
if (headerB == NULL || dataB == NULL) {
PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!get_name(bp, &name, flags))
goto end;
if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
goto end;
EVP_DecodeInit(ctx);
BIO_get_mem_ptr(dataB, &buf_mem);
len = buf_mem->length;
if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
(unsigned char*)buf_mem->data, len) < 0
|| EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
&taillen) < 0) {
PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
goto end;
}
len += taillen;
buf_mem->length = len;
/* There was no data in the PEM file; avoid malloc(0). */
if (len == 0)
goto end;
headerlen = BIO_get_mem_data(headerB, NULL);
*header = pem_malloc(headerlen + 1, flags);
*data = pem_malloc(len, flags);
if (*header == NULL || *data == NULL) {
pem_free(*header, flags, 0);
pem_free(*data, flags, 0);
goto end;
}
BIO_read(headerB, *header, headerlen);
(*header)[headerlen] = '\0';
BIO_read(dataB, *data, len);
*len_out = len;
*name_out = name;
name = NULL;
ret = 1;
end:
EVP_ENCODE_CTX_free(ctx);
pem_free(name, flags, 0);
BIO_free(headerB);
BIO_free(dataB);
return ret;
}
/**
* Extract the optional PEM header, with details on the type of content and
* any encryption used on the contents, and the bulk of the data from the bio.
* The end of the header is marked by a blank line; if the end-of-input marker
* is reached prior to a blank line, there is no header.
*
* The header and data arguments are BIO** since we may have to swap them
* if there is no header, for efficiency.
*
* We need the name of the PEM-encoded type to verify the end string.
*/
static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
unsigned int flags)
{
BIO *tmp = *header;
char *linebuf, *p;
int len, line, ret = 0, end = 0;
/* 0 if not seen (yet), 1 if reading header, 2 if finished header */
enum header_status got_header = MAYBE_HEADER;
unsigned int flags_mask;
size_t namelen;
/* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
* that will be added by sanitize_line() (the extra '1'). */
linebuf = pem_malloc(LINESIZE + 1, flags);
if (linebuf == NULL) {
PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
return 0;
}
for (line = 0; ; line++) {
flags_mask = ~0u;
len = BIO_gets(bp, linebuf, LINESIZE);
if (len <= 0) {
PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
goto err;
}
if (got_header == MAYBE_HEADER) {
if (memchr(linebuf, ':', len) != NULL)
got_header = IN_HEADER;
}
if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
flags_mask &= ~PEM_FLAG_ONLY_B64;
len = sanitize_line(linebuf, len, flags & flags_mask);
/* Check for end of header. */
if (linebuf[0] == '\n') {
if (got_header == POST_HEADER) {
/* Another blank line is an error. */
PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
goto err;
}
got_header = POST_HEADER;
tmp = *data;
continue;
}
/* Check for end of stream (which means there is no header). */
if (strncmp(linebuf, endstr, ENDLEN) == 0) {
p = linebuf + ENDLEN;
namelen = strlen(name);
if (strncmp(p, name, namelen) != 0 ||
strncmp(p + namelen, tailstr, TAILLEN) != 0) {
PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
goto err;
}
if (got_header == MAYBE_HEADER) {
*header = *data;
*data = tmp;
}
break;
} else if (end) {
/* Malformed input; short line not at end of data. */
PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
goto err;
}
/*
* Else, a line of text -- could be header or data; we don't
* know yet. Just pass it through.
*/
if (BIO_puts(tmp, linebuf) < 0)
goto err;
/*
* Only encrypted files need the line length check applied.
*/
if (got_header == POST_HEADER) {
/* 65 includes the trailing newline */
if (len > 65)
goto err;
if (len < 65)
end = 1;
}
}
ret = 1;
err:
pem_free(linebuf, flags, LINESIZE + 1);
return ret;
}
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 = EVP_ENCODE_CTX_new();
int reason = ERR_R_BUF_LIB;
int retval = 0;
if (ctx == NULL) {
reason = ERR_R_MALLOC_FAILURE;
goto err;
}
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);
if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
goto err;
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;
if ((BIO_write(bp, "-----END ", 9) != 9) ||
(BIO_write(bp, name, nlen) != nlen) ||
(BIO_write(bp, "-----\n", 6) != 6))
goto err;
retval = i + outl;
err:
if (retval == 0)
PEMerr(PEM_F_PEM_WRITE_BIO, reason);
EVP_ENCODE_CTX_free(ctx);
OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
return retval;
}
/*
* This implements a very limited PEM header parser that does not support the
* full grammar of rfc1421. In particular, folded headers are not supported,
* nor is additional whitespace.
*
* A robust implementation would make use of a library that turns the headers
* into a BIO from which one folded line is read at a time, and is then split
* into a header label and content. We would then parse the content of the
* headers we care about. This is overkill for just this limited use-case, but
* presumably we also parse rfc822-style headers for S/MIME, so a common
* abstraction might well be more generally useful.
*/
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
{
static const char ProcType[] = "Proc-Type:";
static const char ENCRYPTED[] = "ENCRYPTED";
static const char DEKInfo[] = "DEK-Info:";
const EVP_CIPHER *enc = NULL;
int ivlen;
char *dekinfostart, c;
cipher->cipher = NULL;
memset(cipher->iv, 0, sizeof(cipher->iv));
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
return 1;
if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
return 0;
}
header += sizeof(ProcType)-1;
header += strspn(header, " \t");
if (*header++ != '4' || *header++ != ',')
return 0;
header += strspn(header, " \t");
/* We expect "ENCRYPTED" followed by optional white-space + line break */
if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
return 0;
}
header += sizeof(ENCRYPTED)-1;
header += strspn(header, " \t\r");
if (*header++ != '\n') {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
return 0;
}
/*-
* https://tools.ietf.org/html/rfc1421#section-4.6.1.3
* We expect "DEK-Info: algo[,hex-parameters]"
*/
if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
return 0;
}
header += sizeof(DEKInfo)-1;
header += strspn(header, " \t");
/*
* DEK-INFO is a comma-separated combination of algorithm name and optional
* parameters.
*/
dekinfostart = header;
header += strcspn(header, " \t,");
c = *header;
*header = '\0';
cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
*header = c;
header += strspn(header, " \t");
if (enc == NULL) {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
return 0;
}
ivlen = EVP_CIPHER_iv_length(enc);
if (ivlen > 0 && *header++ != ',') {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
return 0;
} else if (ivlen == 0 && *header == ',') {
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
return 0;
}
if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
return 0;
return 1;
}
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 = NULL;
int dsize = 0, i = 0, j = 0, 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 || EVP_CIPHER_iv_length(enc) == 0
|| EVP_CIPHER_iv_length(enc) > (int)sizeof(iv)
/*
* Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
* fits into buf
*/
|| (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
> sizeof(buf)) {
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;
}
/* dsize + 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;
}
if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 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);
buf[0] = '\0';
PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
/* k=strlen(buf); */
ret = 1;
if ((ctx = EVP_CIPHER_CTX_new()) == NULL
|| !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
|| !EVP_EncryptUpdate(ctx, data, &j, data, i)
|| !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
ret = 0;
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));
EVP_CIPHER_CTX_free(ctx);
OPENSSL_cleanse(buf, PEM_BUFSIZE);
OPENSSL_clear_free(data, (unsigned int)dsize);
return ret;
}
EVP_PKEY *
PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
{
char *nm = NULL;
const unsigned char *p = NULL;
unsigned char *data = NULL;
long len;
int slen;
EVP_PKEY *ret = NULL;
if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY,
bp, cb, u))
return NULL;
p = data;
if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
PKCS8_PRIV_KEY_INFO *p8inf;
p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
if (!p8inf)
goto p8err;
ret = EVP_PKCS82PKEY(p8inf);
if (x) {
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];
p8 = d2i_X509_SIG(NULL, &p, len);
if (!p8)
goto p8err;
if (cb)
klen = cb(psbuf, PEM_BUFSIZE, 0, u);
else
klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
if (klen <= 0) {
PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY,
PEM_R_BAD_PASSWORD_READ);
X509_SIG_free(p8);
goto err;
}
p8inf = PKCS8_decrypt(p8, psbuf, klen);
X509_SIG_free(p8);
if (!p8inf)
goto p8err;
ret = EVP_PKCS82PKEY(p8inf);
if (x) {
EVP_PKEY_free(*x);
*x = ret;
}
PKCS8_PRIV_KEY_INFO_free(p8inf);
} else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
const EVP_PKEY_ASN1_METHOD *ameth;
ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
if (!ameth || !ameth->old_priv_decode)
goto p8err;
ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
}
p8err:
if (ret == NULL)
PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
err:
free(nm);
OPENSSL_cleanse(data, len);
free(data);
return (ret);
}
static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
pem_password_cb *cb, void *u)
{
int outlen = 24, pklen;
unsigned char *p, *salt = NULL;
EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
if (enclevel)
outlen += PVK_SALTLEN;
pklen = do_i2b(NULL, pk, 0);
if (pklen < 0)
return -1;
outlen += pklen;
if (!out)
return outlen;
if (*out)
p = *out;
else {
p = OPENSSL_malloc(outlen);
if (p == NULL) {
PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
return -1;
}
*out = p;
}
write_ledword(&p, MS_PVKMAGIC);
write_ledword(&p, 0);
if (EVP_PKEY_id(pk) == EVP_PKEY_DSA)
write_ledword(&p, MS_KEYTYPE_SIGN);
else
write_ledword(&p, MS_KEYTYPE_KEYX);
write_ledword(&p, enclevel ? 1 : 0);
write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
write_ledword(&p, pklen);
if (enclevel) {
if (RAND_bytes(p, PVK_SALTLEN) <= 0)
goto error;
salt = p;
p += PVK_SALTLEN;
}
do_i2b(&p, pk, 0);
if (enclevel == 0)
return outlen;
else {
char psbuf[PEM_BUFSIZE];
unsigned char keybuf[20];
int enctmplen, inlen;
if (cb)
inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
else
inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
if (inlen <= 0) {
PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
goto error;
}
if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
(unsigned char *)psbuf, inlen))
goto error;
if (enclevel == 1)
memset(keybuf + 5, 0, 11);
p = salt + PVK_SALTLEN + 8;
if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
goto error;
OPENSSL_cleanse(keybuf, 20);
if (!EVP_DecryptUpdate(cctx, p, &enctmplen, p, pklen - 8))
goto error;
if (!EVP_DecryptFinal_ex(cctx, p + enctmplen, &enctmplen))
goto error;
}
EVP_CIPHER_CTX_free(cctx);
return outlen;
error:
EVP_CIPHER_CTX_free(cctx);
return -1;
}
int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
char *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=(unsigned char *)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_pseudo_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 */
EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
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);
EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
EVP_EncryptUpdate(&ctx,data,&j,data,i);
EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
EVP_CIPHER_CTX_cleanup(&ctx);
i+=j;
ret=1;
}
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);
if (data != NULL)
{
OPENSSL_cleanse(data,(unsigned int)dsize);
OPENSSL_free(data);
}
return(ret);
}
static EVP_PKEY *do_PVK_body(const unsigned char **in,
unsigned int saltlen, unsigned int keylen,
pem_password_cb *cb, void *u)
{
EVP_PKEY *ret = NULL;
const unsigned char *p = *in;
unsigned int magic;
unsigned char *enctmp = NULL, *q;
EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
if (saltlen) {
char psbuf[PEM_BUFSIZE];
unsigned char keybuf[20];
int enctmplen, inlen;
if (cb)
inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
else
inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
if (inlen <= 0) {
PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
goto err;
}
enctmp = OPENSSL_malloc(keylen + 8);
if (enctmp == NULL) {
PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
goto err;
}
if (!derive_pvk_key(keybuf, p, saltlen,
(unsigned char *)psbuf, inlen))
goto err;
p += saltlen;
/* Copy BLOBHEADER across, decrypt rest */
memcpy(enctmp, p, 8);
p += 8;
if (keylen < 8) {
PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
goto err;
}
inlen = keylen - 8;
q = enctmp + 8;
if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
goto err;
if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
goto err;
if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
goto err;
magic = read_ledword((const unsigned char **)&q);
if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
q = enctmp + 8;
memset(keybuf + 5, 0, 11);
if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
goto err;
OPENSSL_cleanse(keybuf, 20);
if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
goto err;
if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
goto err;
magic = read_ledword((const unsigned char **)&q);
if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
goto err;
}
} else
OPENSSL_cleanse(keybuf, 20);
p = enctmp;
}
ret = b2i_PrivateKey(&p, keylen);
err:
EVP_CIPHER_CTX_free(cctx);
OPENSSL_free(enctmp);
return ret;
}
static EVP_PKEY *b2i_dss(const unsigned char **in,
unsigned int bitlen, int ispub)
{
const unsigned char *p = *in;
EVP_PKEY *ret = NULL;
DSA *dsa = NULL;
BN_CTX *ctx = NULL;
unsigned int nbyte;
BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL;
BIGNUM *pub_key = NULL;
nbyte = (bitlen + 7) >> 3;
dsa = DSA_new();
ret = EVP_PKEY_new();
if (dsa == NULL || ret == NULL)
goto memerr;
if (!read_lebn(&p, nbyte, &pbn))
goto memerr;
if (!read_lebn(&p, 20, &qbn))
goto memerr;
if (!read_lebn(&p, nbyte, &gbn))
goto memerr;
if (ispub) {
if (!read_lebn(&p, nbyte, &pub_key))
goto memerr;
} else {
if (!read_lebn(&p, 20, &priv_key))
goto memerr;
/* Calculate public key */
pub_key = BN_new();
if (pub_key == NULL)
goto memerr;
if ((ctx = BN_CTX_new()) == NULL)
goto memerr;
if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx))
goto memerr;
BN_CTX_free(ctx);
}
if (!DSA_set0_pqg(dsa, pbn, qbn, gbn))
goto memerr;
pbn = qbn = gbn = NULL;
if (!DSA_set0_key(dsa, pub_key, priv_key))
goto memerr;
EVP_PKEY_set1_DSA(ret, dsa);
DSA_free(dsa);
*in = p;
return ret;
memerr:
PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
DSA_free(dsa);
BN_free(pbn);
BN_free(qbn);
BN_free(gbn);
BN_free(pub_key);
BN_free(priv_key);
EVP_PKEY_free(ret);
BN_CTX_free(ctx);
return NULL;
}
static int do_blob_header(const unsigned char **in, unsigned int length,
unsigned int *pmagic, unsigned int *pbitlen,
int *pisdss, int *pispub)
{
const unsigned char *p = *in;
if (length < 16)
return 0;
/* bType */
if (*p == MS_PUBLICKEYBLOB)
{
if (*pispub == 0)
{
PEMerr(PEM_F_DO_BLOB_HEADER,
PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
return 0;
}
*pispub = 1;
}
else if (*p == MS_PRIVATEKEYBLOB)
{
if (*pispub == 1)
{
PEMerr(PEM_F_DO_BLOB_HEADER,
PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
return 0;
}
*pispub = 0;
}
else
return 0;
p++;
/* Version */
if (*p++ != 0x2)
{
PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
return 0;
}
/* Ignore reserved, aiKeyAlg */
p+= 6;
*pmagic = read_ledword(&p);
*pbitlen = read_ledword(&p);
*pisdss = 0;
switch (*pmagic)
{
case MS_DSS1MAGIC:
*pisdss = 1;
case MS_RSA1MAGIC:
if (*pispub == 0)
{
PEMerr(PEM_F_DO_BLOB_HEADER,
PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
return 0;
}
break;
case MS_DSS2MAGIC:
*pisdss = 1;
case MS_RSA2MAGIC:
if (*pispub == 1)
{
PEMerr(PEM_F_DO_BLOB_HEADER,
PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
return 0;
}
break;
default:
PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
return -1;
}
*in = p;
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 EVP_PKEY *b2i_rsa(const unsigned char **in,
unsigned int bitlen, int ispub)
{
const unsigned char *pin = *in;
EVP_PKEY *ret = NULL;
BIGNUM *e = NULL, *n = NULL, *d = NULL;
BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
RSA *rsa = NULL;
unsigned int nbyte, hnbyte;
nbyte = (bitlen + 7) >> 3;
hnbyte = (bitlen + 15) >> 4;
rsa = RSA_new();
ret = EVP_PKEY_new();
if (rsa == NULL || ret == NULL)
goto memerr;
e = BN_new();
if (e == NULL)
goto memerr;
if (!BN_set_word(e, read_ledword(&pin)))
goto memerr;
if (!read_lebn(&pin, nbyte, &n))
goto memerr;
if (!ispub) {
if (!read_lebn(&pin, hnbyte, &p))
goto memerr;
if (!read_lebn(&pin, hnbyte, &q))
goto memerr;
if (!read_lebn(&pin, hnbyte, &dmp1))
goto memerr;
if (!read_lebn(&pin, hnbyte, &dmq1))
goto memerr;
if (!read_lebn(&pin, hnbyte, &iqmp))
goto memerr;
if (!read_lebn(&pin, nbyte, &d))
goto memerr;
if (!RSA_set0_factors(rsa, p, q))
goto memerr;
p = q = NULL;
if (!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp))
goto memerr;
dmp1 = dmq1 = iqmp = NULL;
}
if (!RSA_set0_key(rsa, n, e, d))
goto memerr;
n = e = d = NULL;
if (!EVP_PKEY_set1_RSA(ret, rsa))
goto memerr;
RSA_free(rsa);
*in = pin;
return ret;
memerr:
PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
BN_free(e);
BN_free(n);
BN_free(p);
BN_free(q);
BN_free(dmp1);
BN_free(dmq1);
BN_free(iqmp);
BN_free(d);
RSA_free(rsa);
EVP_PKEY_free(ret);
return NULL;
}
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);
}
EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
{
char *nm=NULL;
const unsigned char *p=NULL;
unsigned char *data=NULL;
long len;
EVP_PKEY *ret=NULL;
if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
return NULL;
p = data;
if (strcmp(nm,PEM_STRING_RSA) == 0)
ret=d2i_PrivateKey(EVP_PKEY_RSA,x,&p,len);
else if (strcmp(nm,PEM_STRING_DSA) == 0)
ret=d2i_PrivateKey(EVP_PKEY_DSA,x,&p,len);
else if (strcmp(nm,PEM_STRING_ECPRIVATEKEY) == 0)
ret=d2i_PrivateKey(EVP_PKEY_EC,x,&p,len);
else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
PKCS8_PRIV_KEY_INFO *p8inf;
p8inf=d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
if(!p8inf) goto p8err;
ret = EVP_PKCS82PKEY(p8inf);
if(x) {
if(*x) EVP_PKEY_free((EVP_PKEY *)*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];
p8 = d2i_X509_SIG(NULL, &p, len);
if(!p8) goto p8err;
if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
else klen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);
if (klen <= 0) {
PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY,
PEM_R_BAD_PASSWORD_READ);
X509_SIG_free(p8);
goto err;
}
p8inf = PKCS8_decrypt(p8, psbuf, klen);
X509_SIG_free(p8);
if(!p8inf) goto p8err;
ret = EVP_PKCS82PKEY(p8inf);
if(x) {
if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
*x = ret;
}
PKCS8_PRIV_KEY_INFO_free(p8inf);
}
p8err:
if (ret == NULL)
PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY,ERR_R_ASN1_LIB);
err:
OPENSSL_free(nm);
OPENSSL_cleanse(data, len);
OPENSSL_free(data);
return(ret);
}
