1public_key(3) Erlang Module Definition public_key(3)
2
6 public_key - API module for public-key infrastructure.
7
9 Provides functions to handle public-key infrastructure, for details see
10 public_key(6).
11
13 Note:
14 All records used in this Reference Manual are generated from ASN.1
15 specifications and are documented in the User's Guide. See Public-key
16 Records.
17 Use the following include directive to get access to the records and
20 constant macros described here and in the User's Guide:
21 -include_lib("public_key/include/public_key.hrl").
23
25 oid() = tuple()
26 Object identifier, a tuple of integers as generated by the ASN.1
28 compiler.
29 key_oid_name() =
31 rsaEncryption | 'id-RSASSA-PSS' | 'id-ecPublicKey' |
32 'id-Ed25519' | 'id-Ed448' | 'id-dsa'
33 Macro names for key object identifiers used by prefixing with ?
35 der_encoded() = binary()
37 pki_asn1_type() =
39 'Certificate' | 'RSAPrivateKey' | 'RSAPublicKey' |
40 'SubjectPublicKeyInfo' | 'DSAPrivateKey' | 'DHParameter' |
41 'PrivateKeyInfo' | 'CertificationRequest' | 'ContentInfo' |
42 'CertificateList' | 'ECPrivateKey' | 'OneAsymmetricKey' |
43 'EcpkParameters'
44 asn1_type() = atom()
46 ASN.1 type present in the Public Key applications ASN.1 specifi‐
48 cations.
49 pem_entry() =
51 {pki_asn1_type(),
52 der_or_encrypted_der(),
53 not_encrypted | cipher_info()}
54 der_or_encrypted_der() = binary()
56 cipher_info() = {cipher(), cipher_info_params()}
58 cipher() = string()
60 salt() = binary()
62 cipher_info_params() =
64 salt() |
65 {#'PBEParameter'{}, digest_type()} |
66 #'PBES2-params'{}
67 Cipher = "RC2-CBC" | "DES-CBC" | "DES-EDE3-CBC"
69 Salt could be generated with crypto:strong_rand_bytes(8).
71 public_key() =
73 rsa_public_key() |
74 rsa_pss_public_key() |
75 dsa_public_key() |
76 ec_public_key() |
77 ed_public_key()
78 rsa_public_key() = #'RSAPublicKey'{}
80 dss_public_key() = integer()
82 rsa_pss_public_key() =
84 {rsa_pss_public_key(), #'RSASSA-PSS-params'{}}
85 dsa_public_key() = {dss_public_key(), #'Dss-Parms'{}}
87 ec_public_key() = {#'ECPoint'{}, ecpk_parameters_api()}
89 public_key_params() =
91 'NULL' |
92 #'RSASSA-PSS-params'{} |
93 {namedCurve, oid()} |
94 #'ECParameters'{} |
95 #'Dss-Parms'{}
96 ecpk_parameters() =
98 {ecParameters, #'ECParameters'{}} |
99 {namedCurve, Oid :: tuple()}
100 ecpk_parameters_api() =
102 ecpk_parameters() |
103 #'ECParameters'{} |
104 {namedCurve, Name :: crypto:ec_named_curve()}
105 public_key_info() =
107 {key_oid_name(),
108 rsa_public_key() | #'ECPoint'{} | dss_public_key(),
109 public_key_params()}
110 ed_public_key() = {#'ECPoint'{}, ed_params()}
112 ed_params() = {namedCurve, ed_oid_name()}
114 private_key() =
116 rsa_private_key() |
117 rsa_pss_private_key() |
118 dsa_private_key() |
119 ec_private_key() |
120 ed_private_key()
121 rsa_private_key() = #'RSAPrivateKey'{}
123 rsa_pss_private_key() =
125 {#'RSAPrivateKey'{}, #'RSASSA-PSS-params'{}}
126 dsa_private_key() = #'DSAPrivateKey'{}
128 ec_private_key() = #'ECPrivateKey'{}
130 ed_private_key() = #'ECPrivateKey'{parameters = ed_params()}
132 ed_oid_name() = 'id-Ed25519' | 'id-Ed448'
134 Macro names for object identifiers for EDDSA curves used by pre‐
136 fixing with ?
137 key_params() =
139 #'DHParameter'{} |
140 {namedCurve, oid()} |
141 #'ECParameters'{} |
142 {rsa, Size :: integer(), PubExp :: integer()}
143 digest_type() =
145 none | sha1 |
146 crypto:rsa_digest_type() |
147 crypto:dss_digest_type() |
148 crypto:ecdsa_digest_type()
149 issuer_name() = {rdnSequence, [[#'AttributeTypeAndValue'{}]]}
151 referenceIDs() = [referenceID()]
153 referenceID() =
155 {uri_id | dns_id | ip | srv_id | atom() | oid(), string()} |
156 {ip, inet:ip_address() | string()}
157 cert_id() = {SerialNr :: integer(), issuer_name()}
159 cert() = der_cert() | otp_cert()
161 otp_cert() = #'OTPCertificate'{}
163 der_cert() = der_encoded()
165 combined_cert() =
167 #cert{der = public_key:der_encoded(),
168 otp = #'OTPCertificate'{}}
169 bad_cert_reason() =
171 cert_expired | invalid_issuer | invalid_signature |
172 name_not_permitted | missing_basic_constraint |
173 invalid_key_usage |
174 {revoked, crl_reason()} |
175 atom()
176 crl_reason() =
178 unspecified | keyCompromise | cACompromise |
179 affiliationChanged | superseded | cessationOfOperation |
180 certificateHold | privilegeWithdrawn | aACompromise
181 chain_opts() =
183 #{chain_end() := [cert_opt()],
184 intermediates => [[cert_opt()]]}
185 chain_end() = root | peer
187 cert_opt() =
189 {digest, public_key:digest_type()} |
190 {key, public_key:key_params() | public_key:private_key()} |
191 {validity,
192 {From :: erlang:timestamp(), To :: erlang:timestamp()}} |
193 {extensions, [#'Extension'{}]}
194 test_root_cert() =
196 #{cert := der_encoded(), key := public_key:private_key()}
197 test_config() =
199 #{server_config := [conf_opt()],
200 client_config := [conf_opt()]}
201 conf_opt() =
203 {cert, public_key:der_encoded()} |
204 {key, public_key:private_key()} |
205 {cacerts, [public_key:der_encoded()]}
206
208 cacerts_clear() -> boolean()
209 Clears any loaded CA certificates, returns true if any was
211 loaded.
212 cacerts_get() -> [combined_cert()]
214 Returns the trusted CA certificates if any are loaded, otherwise
216 uses cacerts_load/0 to load them. The function fails if no cac‐
217 erts could be loaded.
218 cacerts_load() -> ok | {error, Reason :: term()}
220 Loads the OS supplied trusted CA certificates.
222 cacerts_load(File :: file:filename_all()) ->
224 ok | {error, Reason :: term()}
225 Loads the trusted CA certificates from a file.
227 compute_key(OthersECDHkey, MyECDHkey) -> SharedSecret
229 Types:
231 OthersECDHkey = #'ECPoint'{}
233 MyECDHkey = #'ECPrivateKey'{}
234 SharedSecret = binary()
235 Computes shared secret.
237 compute_key(OthersDHkey, MyDHkey, DHparms) -> SharedSecret
239 Types:
241 OthersDHkey = crypto:dh_public()
243 MyDHkey = crypto:dh_private()
244 DHparms = #'DHParameter'{}
245 SharedSecret = binary()
246 Computes shared secret.
248 decrypt_private(CipherText, Key) -> PlainText
250 decrypt_private(CipherText, Key, Options) -> PlainText
252 Types:
254 CipherText = binary()
256 Key = rsa_private_key()
257 Options = crypto:pk_encrypt_decrypt_opts()
258 PlainText = binary()
259 Public-key decryption using the private key. See also
261 crypto:private_decrypt/4
262 decrypt_public(CipherText, Key) -> PlainText
264 decrypt_public(CipherText, Key, Options) -> PlainText
266 Types:
268 CipherText = binary()
270 Key = rsa_public_key()
271 Options = crypto:pk_encrypt_decrypt_opts()
272 PlainText = binary()
273 Public-key decryption using the public key. See also crypto:pub‐
275 lic_decrypt/4
276 der_decode(Asn1Type, Der) -> Entity
278 Types:
280 Asn1Type = asn1_type()
282 Der = der_encoded()
283 Entity = term()
284 Decodes a public-key ASN.1 DER encoded entity.
286 der_encode(Asn1Type, Entity) -> Der
288 Types:
290 Asn1Type = asn1_type()
292 Entity = term()
293 Der = binary()
294 Encodes a public-key entity with ASN.1 DER encoding.
296 dh_gex_group(MinSize, SuggestedSize, MaxSize, Groups) ->
298 {ok, {Size, Group}} | {error, term()}
299 Types:
301 MinSize = SuggestedSize = MaxSize = integer() >= 1
303 Groups = undefined | [{Size, [Group]}]
304 Size = integer() >= 1
305 Group = {G, P}
306 G = P = integer() >= 1
307 Selects a group for Diffie-Hellman key exchange with the key
309 size in the range MinSize...MaxSize and as close to Suggested‐
310 Size as possible. If Groups == undefined a default set will be
311 used, otherwise the group is selected from Groups.
312 First a size, as close as possible to SuggestedSize, is se‐
314 lected. Then one group with that key size is randomly selected
315 from the specified set of groups. If no size within the limits
316 of MinSize and MaxSize is available, {error,no_group_found} is
317 returned.
318 The default set of groups is listed in lib/public_key/priv/mod‐
320 uli. This file may be regenerated like this:
321 $> cd $ERL_TOP/lib/public_key/priv/
323 $> generate
324 ---- wait until all background jobs has finished. It may take several days !
325 $> cat moduli-* > moduli
326 $> cd ..; make
327 encrypt_private(PlainText, Key) -> CipherText
330 encrypt_private(PlainText, Key, Options) -> CipherText
332 Types:
334 PlainText = binary()
336 Key = rsa_private_key()
337 Options = crypto:pk_encrypt_decrypt_opts()
338 CipherText = binary()
339 Public-key encryption using the private key. See also
341 crypto:private_encrypt/4.
342 encrypt_public(PlainText, Key) -> CipherText
344 encrypt_public(PlainText, Key, Options) -> CipherText
346 Types:
348 PlainText = binary()
350 Key = rsa_public_key()
351 Options = crypto:pk_encrypt_decrypt_opts()
352 CipherText = binary()
353 Public-key encryption using the public key. See also crypto:pub‐
355 lic_encrypt/4.
356 generate_key(Params :: DHparams | ECparams | RSAparams) ->
358 DHkeys | ECkey | RSAkey
359 Types:
361 DHparams = #'DHParameter'{}
363 DHkeys = {PublicDH :: binary(), PrivateDH :: binary()}
364 ECparams = ecpk_parameters_api()
365 ECkey = #'ECPrivateKey'{}
366 RSAparams = {rsa, Size, PubExp}
367 Size = PubExp = integer() >= 1
368 RSAkey = #'RSAPrivateKey'{}
369 Generates a new key pair. Note that except for Diffie-Hellman
371 the public key is included in the private key structure. See
372 also crypto:generate_key/2
373 pem_decode(PemBin :: binary()) -> [pem_entry()]
375 Decodes PEM binary data and returns entries as ASN.1 DER encoded
377 entities.
378 Example {ok, PemBin} = file:read_file("cert.pem"). PemEntries =
380 public_key:pem_decode(PemBin).
381 pem_encode(PemEntries :: [pem_entry()]) -> binary()
383 Creates a PEM binary.
385 pem_entry_decode(PemEntry) -> term()
387 pem_entry_decode(PemEntry, Password) -> term()
389 Types:
391 PemEntry = pem_entry()
393 Password = iodata() | fun(() -> iodata())
394 Decodes a PEM entry. pem_decode/1 returns a list of PEM entries.
396 Notice that if the PEM entry is of type 'SubjectPublickeyInfo',
397 it is further decoded to an rsa_public_key() or dsa_pub‐
398 lic_key().
399 Password can be either an octet string or function which returns
401 same type.
402 pem_entry_encode(Asn1Type, Entity) -> pem_entry()
404 pem_entry_encode(Asn1Type, Entity, InfoPwd) -> pem_entry()
406 Types:
408 Asn1Type = pki_asn1_type()
410 Entity = term()
411 InfoPwd = {CipherInfo, Password}
412 CipherInfo = cipher_info()
413 Password = iodata()
414 Creates a PEM entry that can be feed to pem_encode/1.
416 If Asn1Type is 'SubjectPublicKeyInfo', Entity must be either an
418 rsa_public_key(), dsa_public_key() or an ec_public_key() and
419 this function creates the appropriate 'SubjectPublicKeyInfo' en‐
420 try.
421 pkix_decode_cert(Cert, Type) -> #'Certificate'{} | otp_cert()
423 Types:
425 Cert = der_cert()
427 Type = plain | otp
428 Decodes an ASN.1 DER-encoded PKIX certificate. Option otp uses
430 the customized ASN.1 specification OTP-PKIX.asn1 for decoding
431 and also recursively decode most of the standard parts.
432 pkix_encode(Asn1Type, Entity, Type) -> Der
434 Types:
436 Asn1Type = asn1_type()
438 Entity = term()
439 Type = otp | plain
440 Der = der_encoded()
441 DER encodes a PKIX x509 certificate or part of such a certifi‐
443 cate. This function must be used for encoding certificates or
444 parts of certificates that are decoded/created in the otp for‐
445 mat, whereas for the plain format this function directly calls
446 der_encode/2.
447 Note:
449 Subtle ASN-1 encoding errors in certificates may be worked
450 around when decoding, this may have the affect that the encoding
451 a certificate back to DER may generate different bytes then the
452 supplied original.
453 pkix_is_issuer(CertorCRL, IssuerCert) -> boolean()
456 Types:
458 CertorCRL = cert() | #'CertificateList'{}
460 IssuerCert = cert()
461 Checks if IssuerCert issued Cert.
463 pkix_is_fixed_dh_cert(Cert) -> boolean()
465 Types:
467 Cert = cert()
469 Checks if a certificate is a fixed Diffie-Hellman certificate.
471 pkix_is_self_signed(Cert) -> boolean()
473 Types:
475 Cert = cert()
477 Checks if a certificate is self-signed.
479 pkix_issuer_id(Cert, IssuedBy) ->
481 {ok, ID :: cert_id()} | {error, Reason}
482 Types:
484 Cert = cert()
486 IssuedBy = self | other
487 Reason = term()
488 Returns the x509 certificate issuer id, if it can be determined.
490 pkix_normalize_name(Issuer) -> Normalized
492 Types:
494 Issuer = issuer_name() | der_encoded()
496 Normalized = issuer_name()
497 Normalizes an issuer name so that it can be easily compared to
499 another issuer name.
500 pkix_path_validation(Cert, CertChain, Options) ->
502 {ok, {PublicKeyInfo, PolicyTree}} |
503 {error,
504 {bad_cert, Reason :: bad_cert_reason()}}
505 Types:
507 Cert = cert() | atom()
509 CertChain = [cert() | combined_cert()]
510 Options =
511 [{max_path_length, integer()} |
512 {verify_fun, {function(), term()}}]
513 PublicKeyInfo = public_key_info()
514 PolicyTree = list()
515 Performs a basic path validation according to RFC 5280. However,
517 CRL validation is done separately by pkix_crls_validate/3 and
518 is to be called from the supplied verify_fun. The optional pol‐
519 icy tree check is currently not implemented but an empty place
520 holder list is returned instead.
521 Available options:
523 {verify_fun, {fun(), InitialUserState::term()}:
525 The fun must be defined as:
526 fun(OtpCert :: #'OTPCertificate'{},
528 Event :: {bad_cert, Reason :: atom() | {revoked, atom()}} |
529 {extension, #'Extension'{}},
530 InitialUserState :: term()) ->
531 {valid, UserState :: term()} |
532 {valid_peer, UserState :: term()} |
533 {fail, Reason :: term()} |
534 {unknown, UserState :: term()}.
535 If the verify callback fun returns {fail, Reason}, the veri‐
538 fication process is immediately stopped. If the verify call‐
539 back fun returns {valid, UserState}, the verification
540 process is continued. This can be used to accept specific
541 path validation errors, such as selfsigned_peer, as well as
542 verifying application-specific extensions. If called with an
543 extension unknown to the user application, the return value
544 {unknown, UserState} is to be used.
545 Warning:
547 Note that user defined custom verify_fun may alter original
548 path validation error (e.g selfsigned_peer). Use with caution.
549 {max_path_length, integer()}:
552 The max_path_length is the maximum number of non-self-is‐
553 sued intermediate certificates that can follow the peer cer‐
554 tificate in a valid certification path. So, if
555 max_path_length is 0, the PEER must be signed by the trusted
556 ROOT-CA directly, if it is 1, the path can be PEER, CA,
557 ROOT-CA, if it is 2, the path can be PEER, CA, CA, ROOT-CA,
558 and so on.
559 Explanations of reasons for a bad certificate:
561 cert_expired:
563 Certificate is no longer valid as its expiration date has
564 passed.
565 invalid_issuer:
567 Certificate issuer name does not match the name of the is‐
568 suer certificate in the chain.
569 invalid_signature:
571 Certificate was not signed by its issuer certificate in the
572 chain.
573 name_not_permitted:
575 Invalid Subject Alternative Name extension.
576 missing_basic_constraint:
578 Certificate, required to have the basic constraints exten‐
579 sion, does not have a basic constraints extension.
580 invalid_key_usage:
582 Certificate key is used in an invalid way according to the
583 key-usage extension.
584 {revoked, crl_reason()}:
586 Certificate has been revoked.
587 atom():
589 Application-specific error reason that is to be checked by
590 the verify_fun.
591 pkix_crl_issuer(CRL) -> Issuer
593 Types:
595 CRL = der_encoded() | #'CertificateList'{}
597 Issuer = issuer_name()
598 Returns the issuer of the CRL.
600 pkix_crls_validate(OTPcertificate, DPandCRLs, Options) ->
602 CRLstatus
603 Types:
605 OTPcertificate = #'OTPCertificate'{}
607 DPandCRLs = [DPandCRL]
608 DPandCRL = {DP, {DerCRL, CRL}}
609 DP = #'DistributionPoint'{}
610 DerCRL = der_encoded()
611 CRL = #'CertificateList'{}
612 Options = [{atom(), term()}]
613 CRLstatus = valid | {bad_cert, BadCertReason}
614 BadCertReason =
615 revocation_status_undetermined |
616 {revocation_status_undetermined, Reason :: term()} |
617 {revoked, crl_reason()}
618 Performs CRL validation. It is intended to be called from the
620 verify fun of pkix_path_validation/3 .
621 Available options:
623 {update_crl, fun()}:
625 The fun has the following type specification:
626 fun(#'DistributionPoint'{}, #'CertificateList'{}) ->
628 #'CertificateList'{}
629 The fun uses the information in the distribution point to
631 access the latest possible version of the CRL. If this fun
632 is not specified, Public Key uses the default implementa‐
633 tion:
634 fun(_DP, CRL) -> CRL end
636 {issuer_fun, fun()}:
638 The fun has the following type specification:
639 fun(#'DistributionPoint'{}, #'CertificateList'{},
641 {rdnSequence,[#'AttributeTypeAndValue'{}]}, term()) ->
642 {ok, #'OTPCertificate'{}, [der_encoded]}
643 The fun returns the root certificate and certificate chain
645 that has signed the CRL.
646 fun(DP, CRL, Issuer, UserState) -> {ok, RootCert, CertChain}
648 {undetermined_details, boolean()}:
650 Defaults to false. When revocation status cannot be deter‐
651 mined, and this option is set to true, details of why no
652 CRLs where accepted are included in the return value.
653 pkix_crl_verify(CRL, Cert) -> boolean()
655 Types:
657 CRL = der_encoded() | #'CertificateList'{}
659 Cert = cert()
660 Verify that Cert is the CRL signer.
662 pkix_dist_point(Cert) -> DistPoint
664 Types:
666 Cert = cert()
668 DistPoint = #'DistributionPoint'{}
669 Creates a distribution point for CRLs issued by the same issuer
671 as Cert. Can be used as input to pkix_crls_validate/3
672 pkix_dist_points(Cert) -> DistPoints
674 Types:
676 Cert = cert()
678 DistPoints = [#'DistributionPoint'{}]
679 Extracts distribution points from the certificates extensions.
681 pkix_hash_type(HashOid :: oid()) ->
683 DigestType ::
684 md5 | crypto:sha1() | crypto:sha2()
685 Translates OID to Erlang digest type
687 pkix_match_dist_point(CRL, DistPoint) -> boolean()
689 Types:
691 CRL = der_encoded() | #'CertificateList'{}
693 DistPoint = #'DistributionPoint'{}
694 Checks whether the given distribution point matches the Issuing
696 Distribution Point of the CRL, as described in RFC 5280. If the
697 CRL doesn't have an Issuing Distribution Point extension, the
698 distribution point always matches.
699 pkix_sign(Cert, Key) -> Der
701 Types:
703 Cert = #'OTPTBSCertificate'{}
705 Key = private_key()
706 Der = der_encoded()
707 Signs an 'OTPTBSCertificate'. Returns the corresponding DER-en‐
709 coded certificate.
710 pkix_sign_types(AlgorithmId) -> {DigestType, SignatureType}
712 Types:
714 AlgorithmId = oid()
716 DigestType = crypto:rsa_digest_type() | none
717 SignatureType = rsa | dsa | ecdsa | eddsa
718 Translates signature algorithm OID to Erlang digest and signa‐
720 ture types.
721 The AlgorithmId is the signature OID from a certificate or a
723 certificate revocation list.
724 pkix_test_data(ChainConf) -> TestConf
726 Types:
728 ChainConf =
730 #{server_chain := chain_opts(), client_chain :=
731 chain_opts()} |
732 chain_opts()
733 TestConf = test_config() | [conf_opt()]
734 Creates certificate configuration(s) consisting of certificate
736 and its private key plus CA certificate bundle, for a client and
737 a server, intended to facilitate automated testing of applica‐
738 tions using X509-certificates, often through SSL/TLS. The test
739 data can be used when you have control over both the client and
740 the server in a test scenario.
741 When this function is called with a map containing client and
743 server chain specifications; it generates both a client and a
744 server certificate chain where the cacerts returned for the
745 server contains the root cert the server should trust and the
746 intermediate certificates the server should present to connect‐
747 ing clients. The root cert the server should trust is the one
748 used as root of the client certificate chain. Vice versa applies
749 to the cacerts returned for the client. The root cert(s) can ei‐
750 ther be pre-generated with pkix_test_root_cert/2 , or if op‐
751 tions are specified; it is (they are) generated.
752 When this function is called with a list of certificate options;
754 it generates a configuration with just one node certificate
755 where cacerts contains the root cert and the intermediate certs
756 that should be presented to a peer. In this case the same root
757 cert must be used for all peers. This is useful in for example
758 an Erlang distributed cluster where any node, towards another
759 node, acts either as a server or as a client depending on who
760 connects to whom. The generated certificate contains a subject
761 altname, which is not needed in a client certificate, but makes
762 the certificate useful for both roles.
763 Explanation of the options used to customize certificates in the
765 generated chains:
766 {digest, digest_type()}:
768 Hash algorithm to be used for signing the certificate to‐
769 gether with the key option. Defaults to sha that is sha1.
770 {key, key_params() | private_key()}:
772 Parameters to be used to call public_key:generate_key/1, to
773 generate a key, or an existing key. Defaults to generating
774 an ECDSA key. Note this could fail if Erlang/OTP is compiled
775 with a very old cryptolib.
776 {validity, {From::erlang:timestamp(), To::erlang:time‐
778 stamp()}} :
779 The validity period of the certificate.
780 {extensions, [#'Extension'{}]}:
782 Extensions to include in the certificate.
783 Default extensions included in CA certificates if not other‐
785 wise specified are:
786 [#'Extension'{extnID = ?'id-ce-keyUsage',
788 extnValue = [keyCertSign, cRLSign],
789 critical = false},
790 #'Extension'{extnID = ?'id-ce-basicConstraints',
791 extnValue = #'BasicConstraints'{cA = true},
792 critical = true}]
793 Default extensions included in the server peer cert if not
796 otherwise specified are:
797 [#'Extension'{extnID = ?'id-ce-keyUsage',
799 extnValue = [digitalSignature, keyAgreement],
800 critical = false},
801 #'Extension'{extnID = ?'id-ce-subjectAltName',
802 extnValue = [{dNSName, Hostname}],
803 critical = false}]
804 Hostname is the result of calling net_adm:localhost() in the
807 Erlang node where this function is called.
808 Note:
810 Note that the generated certificates and keys does not provide a
811 formally correct PKIX-trust-chain and they cannot be used to
812 achieve real security. This function is provided for testing
813 purposes only.
814 pkix_test_root_cert(Name, Options) -> RootCert
817 Types:
819 Name = string()
821 Options = [cert_opt()]
822 RootCert = test_root_cert()
823 Generates a root certificate that can be used in multiple calls
825 to pkix_test_data/1 when you want the same root certificate for
826 several generated certificates.
827 pkix_subject_id(Cert) -> ID
829 Types:
831 Cert = cert()
833 ID = cert_id()
834 Returns the X509 certificate subject id.
836 pkix_verify(Cert, Key) -> boolean()
838 Types:
840 Cert = der_cert()
842 Key = public_key()
843 Verifies PKIX x.509 certificate signature.
845 pkix_verify_hostname(Cert, ReferenceIDs) -> boolean()
847 pkix_verify_hostname(Cert, ReferenceIDs, Options) -> boolean()
849 Types:
851 Cert = cert()
853 ReferenceIDs = referenceIDs()
854 Options = [{match_fun | fail_callback | fqdn_fun, func‐
855 tion()}]
856 This function checks that the Presented Identifier (e.g host‐
858 name) in a peer certificate is in agreement with at least one of
859 the Reference Identifier that the client expects to be con‐
860 nected to. The function is intended to be added as an extra
861 client check of the peer certificate when performing pub‐
862 lic_key:pkix_path_validation/3
863 See RFC 6125 for detailed information about hostname verifica‐
865 tion. The User's Guide and code examples describes this function
866 more detailed.
867 The option funs are described here:
869 match_fun:
871 fun(ReferenceId::ReferenceId() | FQDN::string(),
874 PresentedId::{dNSName,string()} | {uniformResourceIdentifier,string() |
875 {iPAddress,list(byte())} | {OtherId::atom()|oid(),term()}})
876 fun(....) -> true; % My special case
878 (_, _) -> default % all others falls back to the inherit tests
879 end
880 See pkix_verify_hostname_match_fun/1 for a function that takes
882 a protocol name as argument and returns a fun/2 suitable for
883 this option and Re-defining the match operation in the User's
884 Guide for an example.
885 Note:
887 Reference Id values given as binaries will be converted to
888 strings, and ip references may be given in string format that
889 is "10.0.1.1" or "1234::5678:9012" as well as on the format
890 inet:ip_address()
891 fail_callback:
894 If a matching fails, there could be circumstances when the
895 certificate should be accepted anyway. Think for example of
896 a web browser where you choose to accept an outdated cer‐
897 tificate. This option enables implementation of such an ex‐
898 ception but for hostnames. This fun/1 is called when no Ref‐
899 erenceID matches. The return value of the fun (a boolean())
900 decides the outcome. If true the the certificate is accepted
901 otherwise it is rejected. See "Pinning" a Certificate in the
902 User's Guide.
903 fqdn_fun:
905 This option augments the host name extraction from URIs and
906 other Reference IDs. It could for example be a very special
907 URI that is not standardised. The fun takes a Reference ID
908 as argument and returns one of:
909 * the hostname
911 * the atom default: the default host name extract function
913 will be used
914 * the atom undefined: a host name could not be extracted.
916 The pkix_verify_hostname/3 will return false.
917 For an example, see Hostname extraction in the User's Guide.
919 pkix_verify_hostname_match_fun(Protocol) -> Result
921 Types:
923 Protocol = https
925 Result = function()
926 The return value of calling this function is intended to be used
928 in the match_fun option in pkix_verify_hostname/3.
929 The returned fun augments the verify hostname matching according
931 to the specific rules for the protocol in the argument.
932 Note:
934 Currently supported https fun will allow wildcard certificate
935 matching as specified by the HTTP standard. Note that for in‐
936 stance LDAP have a different set of wildcard matching rules. If
937 you do not want to allow wildcard certificates (recommended from
938 a security perspective) or otherwise customize the hostname
939 match the default match function used by ssl application will be
940 sufficient.
941 sign(Msg, DigestType, Key) -> Signature
944 sign(Msg, DigestType, Key, Options) -> Signature
946 Types:
948 Msg = binary() | {digest, binary()}
950 DigestType = digest_type()
951 Key = private_key()
952 Options = crypto:pk_sign_verify_opts()
953 Signature = binary()
954 Creates a digital signature.
956 The Msg is either the binary "plain text" data to be signed or
958 it is the hashed value of "plain text", that is, the digest.
959 verify(Msg, DigestType, Signature, Key) -> boolean()
961 verify(Msg, DigestType, Signature, Key, Options) -> boolean()
963 Types:
965 Msg = binary() | {digest, binary()}
967 DigestType = digest_type()
968 Signature = binary()
969 Key = public_key()
970 Options = crypto:pk_sign_verify_opts()
971 Verifies a digital signature.
973 The Msg is either the binary "plain text" data or it is the
975 hashed value of "plain text", that is, the digest.
976 short_name_hash(Name) -> string()
978 Types:
980 Name = issuer_name()
982 Generates a short hash of an issuer name. The hash is returned
984 as a string containing eight hexadecimal digits.
985 The return value of this function is the same as the result of
987 the commands openssl crl -hash and openssl x509 -issuer_hash,
988 when passed the issuer name of a CRL or a certificate, respec‐
989 tively. This hash is used by the c_rehash tool to maintain a di‐
990 rectory of symlinks to CRL files, in order to facilitate looking
991 up a CRL by its issuer name.
992Ericsson AB public_key 1.13.3.1 public_key(3)