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Import OpenSSL 1.1.0f

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Steve Dower
2017-09-07 16:27:43 -07:00
committed by Steve Dower
parent ccd3ab4aff
commit f4b81cb7c9
3340 changed files with 325158 additions and 557542 deletions
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doc/crypto/d2i_X509.pod
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@@ -2,214 +2,552 @@
=head1 NAME
d2i_X509, i2d_X509, d2i_X509_bio, d2i_X509_fp, i2d_X509_bio,
i2d_X509_fp - X509 encode and decode functions
d2i_ACCESS_DESCRIPTION,
d2i_ASIdOrRange,
d2i_ASIdentifierChoice,
d2i_ASIdentifiers,
d2i_ASN1_BIT_STRING,
d2i_ASN1_BMPSTRING,
d2i_ASN1_ENUMERATED,
d2i_ASN1_GENERALIZEDTIME,
d2i_ASN1_GENERALSTRING,
d2i_ASN1_IA5STRING,
d2i_ASN1_INTEGER,
d2i_ASN1_NULL,
d2i_ASN1_OBJECT,
d2i_ASN1_OCTET_STRING,
d2i_ASN1_PRINTABLE,
d2i_ASN1_PRINTABLESTRING,
d2i_ASN1_SEQUENCE_ANY,
d2i_ASN1_SET_ANY,
d2i_ASN1_T61STRING,
d2i_ASN1_TIME,
d2i_ASN1_TYPE,
d2i_ASN1_UINTEGER,
d2i_ASN1_UNIVERSALSTRING,
d2i_ASN1_UTCTIME,
d2i_ASN1_UTF8STRING,
d2i_ASN1_VISIBLESTRING,
d2i_ASRange,
d2i_AUTHORITY_INFO_ACCESS,
d2i_AUTHORITY_KEYID,
d2i_BASIC_CONSTRAINTS,
d2i_CERTIFICATEPOLICIES,
d2i_CMS_ContentInfo,
d2i_CMS_ReceiptRequest,
d2i_CMS_bio,
d2i_CRL_DIST_POINTS,
d2i_DHxparams,
d2i_DIRECTORYSTRING,
d2i_DISPLAYTEXT,
d2i_DIST_POINT,
d2i_DIST_POINT_NAME,
d2i_DSAPrivateKey,
d2i_DSAPrivateKey_bio,
d2i_DSAPrivateKey_fp,
d2i_DSAPublicKey,
d2i_DSA_PUBKEY_bio,
d2i_DSA_PUBKEY_fp,
d2i_DSA_SIG,
d2i_DSAparams,
d2i_ECPKParameters,
d2i_ECParameters,
d2i_ECPrivateKey,
d2i_ECPrivateKey_bio,
d2i_ECPrivateKey_fp,
d2i_EC_PUBKEY,
d2i_EC_PUBKEY_bio,
d2i_EC_PUBKEY_fp,
d2i_EDIPARTYNAME,
d2i_ESS_CERT_ID,
d2i_ESS_ISSUER_SERIAL,
d2i_ESS_SIGNING_CERT,
d2i_EXTENDED_KEY_USAGE,
d2i_GENERAL_NAME,
d2i_GENERAL_NAMES,
d2i_IPAddressChoice,
d2i_IPAddressFamily,
d2i_IPAddressOrRange,
d2i_IPAddressRange,
d2i_ISSUING_DIST_POINT,
d2i_NETSCAPE_CERT_SEQUENCE,
d2i_NETSCAPE_SPKAC,
d2i_NETSCAPE_SPKI,
d2i_NOTICEREF,
d2i_OCSP_BASICRESP,
d2i_OCSP_CERTID,
d2i_OCSP_CERTSTATUS,
d2i_OCSP_CRLID,
d2i_OCSP_ONEREQ,
d2i_OCSP_REQINFO,
d2i_OCSP_REQUEST,
d2i_OCSP_RESPBYTES,
d2i_OCSP_RESPDATA,
d2i_OCSP_RESPID,
d2i_OCSP_RESPONSE,
d2i_OCSP_REVOKEDINFO,
d2i_OCSP_SERVICELOC,
d2i_OCSP_SIGNATURE,
d2i_OCSP_SINGLERESP,
d2i_OTHERNAME,
d2i_PBE2PARAM,
d2i_PBEPARAM,
d2i_PBKDF2PARAM,
d2i_PKCS12,
d2i_PKCS12_BAGS,
d2i_PKCS12_MAC_DATA,
d2i_PKCS12_SAFEBAG,
d2i_PKCS12_bio,
d2i_PKCS12_fp,
d2i_PKCS7,
d2i_PKCS7_DIGEST,
d2i_PKCS7_ENCRYPT,
d2i_PKCS7_ENC_CONTENT,
d2i_PKCS7_ENVELOPE,
d2i_PKCS7_ISSUER_AND_SERIAL,
d2i_PKCS7_RECIP_INFO,
d2i_PKCS7_SIGNED,
d2i_PKCS7_SIGNER_INFO,
d2i_PKCS7_SIGN_ENVELOPE,
d2i_PKCS7_bio,
d2i_PKCS7_fp,
d2i_PKCS8_PRIV_KEY_INFO,
d2i_PKCS8_PRIV_KEY_INFO_bio,
d2i_PKCS8_PRIV_KEY_INFO_fp,
d2i_PKCS8_bio,
d2i_PKCS8_fp,
d2i_PKEY_USAGE_PERIOD,
d2i_POLICYINFO,
d2i_POLICYQUALINFO,
d2i_PROXY_CERT_INFO_EXTENSION,
d2i_PROXY_POLICY,
d2i_PublicKey,
d2i_RSAPrivateKey,
d2i_RSAPrivateKey_bio,
d2i_RSAPrivateKey_fp,
d2i_RSAPublicKey,
d2i_RSAPublicKey_bio,
d2i_RSAPublicKey_fp,
d2i_RSA_OAEP_PARAMS,
d2i_RSA_PSS_PARAMS,
d2i_RSA_PUBKEY,
d2i_RSA_PUBKEY_bio,
d2i_RSA_PUBKEY_fp,
d2i_SCT_LIST,
d2i_SXNET,
d2i_SXNETID,
d2i_TS_ACCURACY,
d2i_TS_MSG_IMPRINT,
d2i_TS_MSG_IMPRINT_bio,
d2i_TS_MSG_IMPRINT_fp,
d2i_TS_REQ,
d2i_TS_REQ_bio,
d2i_TS_REQ_fp,
d2i_TS_RESP,
d2i_TS_RESP_bio,
d2i_TS_RESP_fp,
d2i_TS_STATUS_INFO,
d2i_TS_TST_INFO,
d2i_TS_TST_INFO_bio,
d2i_TS_TST_INFO_fp,
d2i_USERNOTICE,
d2i_X509,
d2i_X509_ALGOR,
d2i_X509_ALGORS,
d2i_X509_ATTRIBUTE,
d2i_X509_CERT_AUX,
d2i_X509_CINF,
d2i_X509_CRL,
d2i_X509_CRL_INFO,
d2i_X509_CRL_bio,
d2i_X509_CRL_fp,
d2i_X509_EXTENSION,
d2i_X509_EXTENSIONS,
d2i_X509_NAME,
d2i_X509_NAME_ENTRY,
d2i_X509_PUBKEY,
d2i_X509_REQ,
d2i_X509_REQ_INFO,
d2i_X509_REQ_bio,
d2i_X509_REQ_fp,
d2i_X509_REVOKED,
d2i_X509_SIG,
d2i_X509_VAL,
i2d_ACCESS_DESCRIPTION,
i2d_ASIdOrRange,
i2d_ASIdentifierChoice,
i2d_ASIdentifiers,
i2d_ASN1_BIT_STRING,
i2d_ASN1_BMPSTRING,
i2d_ASN1_ENUMERATED,
i2d_ASN1_GENERALIZEDTIME,
i2d_ASN1_GENERALSTRING,
i2d_ASN1_IA5STRING,
i2d_ASN1_INTEGER,
i2d_ASN1_NULL,
i2d_ASN1_OBJECT,
i2d_ASN1_OCTET_STRING,
i2d_ASN1_PRINTABLE,
i2d_ASN1_PRINTABLESTRING,
i2d_ASN1_SEQUENCE_ANY,
i2d_ASN1_SET_ANY,
i2d_ASN1_T61STRING,
i2d_ASN1_TIME,
i2d_ASN1_TYPE,
i2d_ASN1_UNIVERSALSTRING,
i2d_ASN1_UTCTIME,
i2d_ASN1_UTF8STRING,
i2d_ASN1_VISIBLESTRING,
i2d_ASN1_bio_stream,
i2d_ASRange,
i2d_AUTHORITY_INFO_ACCESS,
i2d_AUTHORITY_KEYID,
i2d_BASIC_CONSTRAINTS,
i2d_CERTIFICATEPOLICIES,
i2d_CMS_ContentInfo,
i2d_CMS_ReceiptRequest,
i2d_CMS_bio,
i2d_CRL_DIST_POINTS,
i2d_DHxparams,
i2d_DIRECTORYSTRING,
i2d_DISPLAYTEXT,
i2d_DIST_POINT,
i2d_DIST_POINT_NAME,
i2d_DSAPrivateKey,
i2d_DSAPrivateKey_bio,
i2d_DSAPrivateKey_fp,
i2d_DSAPublicKey,
i2d_DSA_PUBKEY_bio,
i2d_DSA_PUBKEY_fp,
i2d_DSA_SIG,
i2d_DSAparams,
i2d_ECPKParameters,
i2d_ECParameters,
i2d_ECPrivateKey,
i2d_ECPrivateKey_bio,
i2d_ECPrivateKey_fp,
i2d_EC_PUBKEY,
i2d_EC_PUBKEY_bio,
i2d_EC_PUBKEY_fp,
i2d_EDIPARTYNAME,
i2d_ESS_CERT_ID,
i2d_ESS_ISSUER_SERIAL,
i2d_ESS_SIGNING_CERT,
i2d_EXTENDED_KEY_USAGE,
i2d_GENERAL_NAME,
i2d_GENERAL_NAMES,
i2d_IPAddressChoice,
i2d_IPAddressFamily,
i2d_IPAddressOrRange,
i2d_IPAddressRange,
i2d_ISSUING_DIST_POINT,
i2d_NETSCAPE_CERT_SEQUENCE,
i2d_NETSCAPE_SPKAC,
i2d_NETSCAPE_SPKI,
i2d_NOTICEREF,
i2d_OCSP_BASICRESP,
i2d_OCSP_CERTID,
i2d_OCSP_CERTSTATUS,
i2d_OCSP_CRLID,
i2d_OCSP_ONEREQ,
i2d_OCSP_REQINFO,
i2d_OCSP_REQUEST,
i2d_OCSP_RESPBYTES,
i2d_OCSP_RESPDATA,
i2d_OCSP_RESPID,
i2d_OCSP_RESPONSE,
i2d_OCSP_REVOKEDINFO,
i2d_OCSP_SERVICELOC,
i2d_OCSP_SIGNATURE,
i2d_OCSP_SINGLERESP,
i2d_OTHERNAME,
i2d_PBE2PARAM,
i2d_PBEPARAM,
i2d_PBKDF2PARAM,
i2d_PKCS12,
i2d_PKCS12_BAGS,
i2d_PKCS12_MAC_DATA,
i2d_PKCS12_SAFEBAG,
i2d_PKCS12_bio,
i2d_PKCS12_fp,
i2d_PKCS7,
i2d_PKCS7_DIGEST,
i2d_PKCS7_ENCRYPT,
i2d_PKCS7_ENC_CONTENT,
i2d_PKCS7_ENVELOPE,
i2d_PKCS7_ISSUER_AND_SERIAL,
i2d_PKCS7_NDEF,
i2d_PKCS7_RECIP_INFO,
i2d_PKCS7_SIGNED,
i2d_PKCS7_SIGNER_INFO,
i2d_PKCS7_SIGN_ENVELOPE,
i2d_PKCS7_bio,
i2d_PKCS7_fp,
i2d_PKCS8PrivateKeyInfo_bio,
i2d_PKCS8PrivateKeyInfo_fp,
i2d_PKCS8_PRIV_KEY_INFO,
i2d_PKCS8_PRIV_KEY_INFO_bio,
i2d_PKCS8_PRIV_KEY_INFO_fp,
i2d_PKCS8_bio,
i2d_PKCS8_fp,
i2d_PKEY_USAGE_PERIOD,
i2d_POLICYINFO,
i2d_POLICYQUALINFO,
i2d_PROXY_CERT_INFO_EXTENSION,
i2d_PROXY_POLICY,
i2d_PublicKey,
i2d_RSAPrivateKey,
i2d_RSAPrivateKey_bio,
i2d_RSAPrivateKey_fp,
i2d_RSAPublicKey,
i2d_RSAPublicKey_bio,
i2d_RSAPublicKey_fp,
i2d_RSA_OAEP_PARAMS,
i2d_RSA_PSS_PARAMS,
i2d_RSA_PUBKEY,
i2d_RSA_PUBKEY_bio,
i2d_RSA_PUBKEY_fp,
i2d_SCT_LIST,
i2d_SXNET,
i2d_SXNETID,
i2d_TS_ACCURACY,
i2d_TS_MSG_IMPRINT,
i2d_TS_MSG_IMPRINT_bio,
i2d_TS_MSG_IMPRINT_fp,
i2d_TS_REQ,
i2d_TS_REQ_bio,
i2d_TS_REQ_fp,
i2d_TS_RESP,
i2d_TS_RESP_bio,
i2d_TS_RESP_fp,
i2d_TS_STATUS_INFO,
i2d_TS_TST_INFO,
i2d_TS_TST_INFO_bio,
i2d_TS_TST_INFO_fp,
i2d_USERNOTICE,
i2d_X509,
i2d_X509_ALGOR,
i2d_X509_ALGORS,
i2d_X509_ATTRIBUTE,
i2d_X509_CERT_AUX,
i2d_X509_CINF,
i2d_X509_CRL,
i2d_X509_CRL_INFO,
i2d_X509_CRL_bio,
i2d_X509_CRL_fp,
i2d_X509_EXTENSION,
i2d_X509_EXTENSIONS,
i2d_X509_NAME,
i2d_X509_NAME_ENTRY,
i2d_X509_PUBKEY,
i2d_X509_REQ,
i2d_X509_REQ_INFO,
i2d_X509_REQ_bio,
i2d_X509_REQ_fp,
i2d_X509_REVOKED,
i2d_X509_SIG,
i2d_X509_VAL,
- convert objects from/to ASN.1/DER representation
=head1 SYNOPSIS
#include <openssl/x509.h>
=for comment generic
X509 *d2i_X509(X509 **px, const unsigned char **in, long len);
X509 *d2i_X509_AUX(X509 **px, const unsigned char **in, long len);
int i2d_X509(X509 *x, unsigned char **out);
int i2d_X509_AUX(X509 *x, unsigned char **out);
TYPE *d2i_TYPE(TYPE **a, unsigned char **pp, long length);
TYPE *d2i_TYPE_bio(BIO *bp, TYPE **a);
TYPE *d2i_TYPE_fp(FILE *fp, TYPE **a);
X509 *d2i_X509_bio(BIO *bp, X509 **x);
X509 *d2i_X509_fp(FILE *fp, X509 **x);
int i2d_X509_bio(BIO *bp, X509 *x);
int i2d_X509_fp(FILE *fp, X509 *x);
int i2d_re_X509_tbs(X509 *x, unsigned char **out);
int i2d_TYPE(TYPE *a, unsigned char **pp);
int i2d_TYPE_fp(FILE *fp, TYPE *a);
int i2d_TYPE_bio(BIO *bp, TYPE *a);
=head1 DESCRIPTION
The X509 encode and decode routines encode and parse an
B<X509> structure, which represents an X509 certificate.
In the description here, I<TYPE> is used a placeholder
for any of the OpenSSL datatypes, such as I<X509_CRL>.
d2i_X509() attempts to decode B<len> bytes at B<*in>. If
successful a pointer to the B<X509> structure is returned. If an error
occurred then B<NULL> is returned. If B<px> is not B<NULL> then the
returned structure is written to B<*px>. If B<*px> is not B<NULL>
then it is assumed that B<*px> contains a valid B<X509>
structure and an attempt is made to reuse it. This "reuse" capability is present
for historical compatibility but its use is B<strongly discouraged> (see BUGS
below, and the discussion in the RETURN VALUES section).
These functions convert OpenSSL objects to and from their ASN.1/DER
encoding. Unlike the C structures which can have pointers to sub-objects
within, the DER is a serialized encoding, suitable for sending over the
network, writing to a file, and so on.
If the call is successful B<*in> is incremented to the byte following the
parsed data.
d2i_TYPE() attempts to decode B<len> bytes at B<*in>. If successful a
pointer to the B<TYPE> structure is returned and B<*in> is incremented to
the byte following the parsed data. If B<a> is not B<NULL> then a pointer
to the returned structure is also written to B<*a>. If an error occurred
then B<NULL> is returned.
d2i_X509_AUX() is similar to d2i_X509() but the input is expected to consist of
an X509 certificate followed by auxiliary trust information.
This is used by the PEM routines to read "TRUSTED CERTIFICATE" objects.
This function should not be called on untrusted input.
On a successful return, if B<*a> is not B<NULL> then it is assumed that B<*a>
contains a valid B<TYPE> structure and an attempt is made to reuse it. This
"reuse" capability is present for historical compatibility but its use is
B<strongly discouraged> (see BUGS below, and the discussion in the RETURN
VALUES section).
i2d_X509() encodes the structure pointed to by B<x> into DER format.
If B<out> is not B<NULL> is writes the DER encoded data to the buffer
at B<*out>, and increments it to point after the data just written.
If the return value is negative an error occurred, otherwise it
returns the length of the encoded data.
For OpenSSL 0.9.7 and later if B<*out> is B<NULL> memory will be
allocated for a buffer and the encoded data written to it. In this
case B<*out> is not incremented and it points to the start of the
data just written.
i2d_X509_AUX() is similar to i2d_X509(), but the encoded output contains both
the certificate and any auxiliary trust information.
This is used by the PEM routines to write "TRUSTED CERTIFICATE" objects.
Note, this is a non-standard OpenSSL-specific data format.
d2i_X509_bio() is similar to d2i_X509() except it attempts
d2i_TYPE_bio() is similar to d2i_TYPE() except it attempts
to parse data from BIO B<bp>.
d2i_X509_fp() is similar to d2i_X509() except it attempts
d2i_TYPE_fp() is similar to d2i_TYPE() except it attempts
to parse data from FILE pointer B<fp>.
i2d_X509_bio() is similar to i2d_X509() except it writes
the encoding of the structure B<x> to BIO B<bp> and it
i2d_TYPE() encodes the structure pointed to by B<a> into DER format.
If B<out> is not B<NULL>, it writes the DER encoded data to the buffer
at B<*out>, and increments it to point after the data just written.
If the return value is negative an error occurred, otherwise it
returns the length of the encoded data.
If B<*out> is B<NULL> memory will be allocated for a buffer and the encoded
data written to it. In this case B<*out> is not incremented and it points
to the start of the data just written.
i2d_TYPE_bio() is similar to i2d_TYPE() except it writes
the encoding of the structure B<a> to BIO B<bp> and it
returns 1 for success and 0 for failure.
i2d_X509_fp() is similar to i2d_X509() except it writes
the encoding of the structure B<x> to BIO B<bp> and it
i2d_TYPE_fp() is similar to i2d_TYPE() except it writes
the encoding of the structure B<a> to BIO B<bp> and it
returns 1 for success and 0 for failure.
i2d_re_X509_tbs() is similar to i2d_X509() except it encodes
only the TBSCertificate portion of the certificate.
These routines do not encrypt private keys and therefore offer no
security; use L<PEM_write_PrivateKey(3)> or similar for writing to files.
=head1 NOTES
The letters B<i> and B<d> in for example B<i2d_X509> stand for
"internal" (that is an internal C structure) and "DER". So
B<i2d_X509> converts from internal to DER. The "re" in
B<i2d_re_X509_tbs> stands for "re-encode", and ensures that a fresh
encoding is generated in case the object has been modified after
creation (see the BUGS section).
The letters B<i> and B<d> in B<i2d_TYPE> stand for
"internal" (that is, an internal C structure) and "DER" respectively.
So B<i2d_TYPE> converts from internal to DER.
The functions can also understand B<BER> forms.
The actual X509 structure passed to i2d_X509() must be a valid
populated B<X509> structure it can B<not> simply be fed with an
empty structure such as that returned by X509_new().
The actual TYPE structure passed to i2d_TYPE() must be a valid
populated B<TYPE> structure -- it B<cannot> simply be fed with an
empty structure such as that returned by TYPE_new().
The encoded data is in binary form and may contain embedded zeroes.
Therefore any FILE pointers or BIOs should be opened in binary mode.
Functions such as B<strlen()> will B<not> return the correct length
Functions such as strlen() will B<not> return the correct length
of the encoded structure.
The ways that B<*in> and B<*out> are incremented after the operation
can trap the unwary. See the B<WARNINGS> section for some common
errors.
The reason for the auto increment behaviour is to reflect a typical
The reason for this-auto increment behaviour is to reflect a typical
usage of ASN1 functions: after one structure is encoded or decoded
another will processed after it.
another will be processed after it.
The following points about the data types might be useful:
=over 4
=item B<ASN1_OBJECT>
Represents an ASN1 OBJECT IDENTIFIER.
=item B<DHparams>
Represents a PKCS#3 DH parameters structure.
=item B<DHparamx>
Represents a ANSI X9.42 DH parameters structure.
=item B<DSA_PUBKEY>
Represents a DSA public key using a B<SubjectPublicKeyInfo> structure.
=item B<DSAPublicKey, DSAPrivateKey>
Use a non-standard OpenSSL format and should be avoided; use B<DSA_PUBKEY>,
B<PEM_write_PrivateKey(3)>, or similar instead.
=item B<RSAPublicKey>
Represents a PKCS#1 RSA public key structure.
=item B<X509_ALGOR>
Represents an B<AlogrithmIdentifier> structure as used in IETF RFC 6960 and
elsewhere.
=item B<X509_Name>
Represents a B<Name> type as used for subject and issuer names in
IETF RFC 6960 and elsewhere.
=item B<X509_REQ>
Represents a PKCS#10 certificate request.
=item B<X509_SIG>
Represents the B<DigestInfo> structure defined in PKCS#1 and PKCS#7.
=back
=head1 EXAMPLES
Allocate and encode the DER encoding of an X509 structure:
int len;
unsigned char *buf, *p;
len = i2d_X509(x, NULL);
buf = OPENSSL_malloc(len);
if (buf == NULL)
/* error */
p = buf;
i2d_X509(x, &p);
If you are using OpenSSL 0.9.7 or later then this can be
simplified to:
int len;
unsigned char *buf;
buf = NULL;
len = i2d_X509(x, &buf);
if (len < 0)
/* error */
/* error */
Attempt to decode a buffer:
X509 *x;
unsigned char *buf, *p;
int len;
/* Something to setup buf and len */
/* Set up buf and len to point to the input buffer. */
p = buf;
x = d2i_X509(NULL, &p, len);
if (x == NULL)
/* Some error */
/* error */
Alternative technique:
X509 *x;
unsigned char *buf, *p;
int len;
/* Something to setup buf and len */
/* Set up buf and len to point to the input buffer. */
p = buf;
x = NULL;
if(!d2i_X509(&x, &p, len))
/* Some error */
if (d2i_X509(&x, &p, len) == NULL)
/* error */
=head1 WARNINGS
The use of temporary variable is mandatory. A common
Using a temporary variable is mandatory. A common
mistake is to attempt to use a buffer directly as follows:
int len;
unsigned char *buf;
len = i2d_X509(x, NULL);
buf = OPENSSL_malloc(len);
if (buf == NULL)
/* error */
...
i2d_X509(x, &buf);
/* Other stuff ... */
...
OPENSSL_free(buf);
This code will result in B<buf> apparently containing garbage because
it was incremented after the call to point after the data just written.
Also B<buf> will no longer contain the pointer allocated by B<OPENSSL_malloc()>
and the subsequent call to B<OPENSSL_free()> may well crash.
Also B<buf> will no longer contain the pointer allocated by OPENSSL_malloc()
and the subsequent call to OPENSSL_free() is likely to crash.
The auto allocation feature (setting buf to NULL) only works on OpenSSL
0.9.7 and later. Attempts to use it on earlier versions will typically
cause a segmentation violation.
Another trap to avoid is misuse of the B<xp> argument to B<d2i_X509()>:
Another trap to avoid is misuse of the B<a> argument to d2i_TYPE():
X509 *x;
if (!d2i_X509(&x, &p, len))
/* Some error */
if (d2i_X509(&x, &p, len) == NULL)
/* error */
This will probably crash somewhere in B<d2i_X509()>. The reason for this
This will probably crash somewhere in d2i_X509(). The reason for this
is that the variable B<x> is uninitialized and an attempt will be made to
interpret its (invalid) value as an B<X509> structure, typically causing
a segmentation violation. If B<x> is set to NULL first then this will not
@@ -217,56 +555,44 @@ happen.
=head1 BUGS
In some versions of OpenSSL the "reuse" behaviour of d2i_X509() when
In some versions of OpenSSL the "reuse" behaviour of d2i_TYPE() when
B<*px> is valid is broken and some parts of the reused structure may
persist if they are not present in the new one. As a result the use
of this "reuse" behaviour is strongly discouraged.
i2d_X509() will not return an error in many versions of OpenSSL,
i2d_TYPE() will not return an error in many versions of OpenSSL,
if mandatory fields are not initialized due to a programming error
then the encoded structure may contain invalid data or omit the
fields entirely and will not be parsed by d2i_X509(). This may be
fixed in future so code should not assume that i2d_X509() will
fields entirely and will not be parsed by d2i_TYPE(). This may be
fixed in future so code should not assume that i2d_TYPE() will
always succeed.
The encoding of the TBSCertificate portion of a certificate is cached
in the B<X509> structure internally to improve encoding performance
and to ensure certificate signatures are verified correctly in some
certificates with broken (non-DER) encodings.
Any function which encodes an X509 structure such as i2d_X509(),
i2d_X509_fp() or i2d_X509_bio() may return a stale encoding if the
B<X509> structure has been modified after deserialization or previous
serialization.
If, after modification, the B<X509> object is re-signed with X509_sign(),
the encoding is automatically renewed. Otherwise, the encoding of the
TBSCertificate portion of the B<X509> can be manually renewed by calling
i2d_re_X509_tbs().
Any function which encodes a structure (i2d_TYPE(),
i2d_TYPE() or i2d_TYPE()) may return a stale encoding if the
structure has been modified after deserialization or previous
serialization. This is because some objects cache the encoding for
efficiency reasons.
=head1 RETURN VALUES
d2i_X509(), d2i_X509_bio() and d2i_X509_fp() return a valid B<X509> structure
or B<NULL> if an error occurs. The error code that can be obtained by
L<ERR_get_error(3)|ERR_get_error(3)>. If the "reuse" capability has been used
with a valid X509 structure being passed in via B<px> then the object is not
freed in the event of error but may be in a potentially invalid or inconsistent
state.
d2i_TYPE(), d2i_TYPE_bio() and d2i_TYPE_fp() return a valid B<TYPE> structure
or B<NULL> if an error occurs. If the "reuse" capability has been used with
a valid structure being passed in via B<a>, then the object is not freed in
the event of error but may be in a potentially invalid or inconsistent state.
i2d_X509() returns the number of bytes successfully encoded or a negative
value if an error occurs. The error code can be obtained by
L<ERR_get_error(3)|ERR_get_error(3)>.
i2d_TYPE() returns the number of bytes successfully encoded or a negative
value if an error occurs.
i2d_X509_bio() and i2d_X509_fp() return 1 for success and 0 if an error
occurs The error code can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
i2d_TYPE_bio() and i2d_TYPE_fp() return 1 for success and 0 if an error
occurs.
=head1 SEE ALSO
=head1 COPYRIGHT
L<ERR_get_error(3)|ERR_get_error(3)>
Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
=head1 HISTORY
d2i_X509, i2d_X509, d2i_X509_bio, d2i_X509_fp, i2d_X509_bio and i2d_X509_fp
are available in all versions of SSLeay and OpenSSL.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut