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-rw-r--r--lib/public_key/doc/src/public_key.xml164
1 files changed, 137 insertions, 27 deletions
diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml
index b240d53571..66c9217579 100644
--- a/lib/public_key/doc/src/public_key.xml
+++ b/lib/public_key/doc/src/public_key.xml
@@ -33,12 +33,30 @@
<module>public_key</module>
<modulesummary> API module for public key infrastructure.</modulesummary>
<description>
- <p>This module provides functions to handle public key infrastructure
- from <url href="http://www.ietf.org/rfc/rfc5280.txt">RFC 5280</url>- X.509 certificates and some parts of the PKCS-standard.
+ <p>This module provides functions to handle public key infrastructure. It can
+ encode/decode different file formats (PEM, openssh), sign and verify digital signatures and vlidate
+ certificate paths and certificate revokation lists.
</p>
</description>
<section>
+ <title>public_key</title>
+
+ <list type="bulleted">
+ <item>public_key requires the crypto application.</item>
+
+ <item>Supports <url href="http://www.ietf.org/rfc/rfc5280.txt">RFC 5280 </url> -
+ Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile </item>
+ <item>Supports <url href="http://www.rsa.com/rsalabs/node.asp?id=2125"> PKCS-1 </url> - RSA Cryptography Standard </item>
+ <item>Supports <url href="http://csrc.nist.gov/publications/fips/fips186-3/fips_186-3.pdf"> DSA</url>- Digital Signature Algorithm</item>
+ <item>Supports <url href="http://www.rsa.com/rsalabs/node.asp?id=2126"> PKCS-3 </url> - Diffie-Hellman Key Agreement Standard </item>
+ <item>Supports <url href="http://www.rsa.com/rsalabs/node.asp?id=2127"> PKCS-5</url> - Password-Based Cryptography Standard </item>
+ <item>Supports <url href="http://www.rsa.com/rsalabs/node.asp?id=2130"> PKCS-8</url> - Private-Key Information Syntax Standard</item>
+ <item>Supports <url href="http://www.rsa.com/rsalabs/node.asp?id=2132"> PKCS-10</url> - Certification Request Syntax Standard</item>
+ </list>
+ </section>
+
+ <section>
<title>COMMON DATA TYPES </title>
<note><p>All records used in this manual
@@ -58,7 +76,9 @@
<p><code>boolean() = true | false</code></p>
- <p><code>string = [bytes()]</code></p>
+ <p><code>string() = [bytes()]</code></p>
+
+ <p><code>der_encoded() = binary()</code></p>
<p><code>pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'| 'RSAPublicKey' |
'DSAPrivateKey' | 'DSAPublicKey' | 'DHParameter' | 'SubjectPublicKeyInfo' |
@@ -87,6 +107,9 @@
<p><code> dss_digest_type() = 'sha' </code></p>
+ <p><code> crl_reason() = unspecified | keyCompromise | cACompromise | affiliationChanged | superseded | cessationOfOperation | certificateHold | privilegeWithdrawn | aACompromise
+ </code></p>
+
<p><code> ssh_file() = openssh_public_key | rfc4716_public_key |
known_hosts | auth_keys </code></p>
@@ -151,7 +174,7 @@
<func>
<name>der_decode(Asn1type, Der) -> term()</name>
- <fsummary> Decodes a public key asn1 der encoded entity.</fsummary>
+ <fsummary> Decodes a public key ASN.1 DER encoded entity.</fsummary>
<type>
<v>Asn1Type = atom()</v>
<d> ASN.1 type present in the public_key applications
@@ -159,7 +182,7 @@
<v>Der = der_encoded()</v>
</type>
<desc>
- <p> Decodes a public key ASN.1 der encoded entity.</p>
+ <p> Decodes a public key ASN.1 DER encoded entity.</p>
</desc>
</func>
@@ -181,14 +204,14 @@
<func>
<name>pem_decode(PemBin) -> [pem_entry()]</name>
<fsummary>Decode PEM binary data and return
- entries as ASN.1 der encoded entities. </fsummary>
+ entries as ASN.1 DER encoded entities. </fsummary>
<type>
<v>PemBin = binary()</v>
<d>Example {ok, PemBin} = file:read_file("cert.pem").</d>
</type>
<desc>
<p>Decode PEM binary data and return
- entries as ASN.1 der encoded entities.</p>
+ entries as ASN.1 DER encoded entities.</p>
</desc>
</func>
@@ -212,8 +235,8 @@
<v> Password = string() </v>
</type>
<desc>
- <p>Decodes a pem entry. pem_decode/1 returns a list of pem
- entries. Note that if the pem entry is of type
+ <p>Decodes a PEM entry. pem_decode/1 returns a list of PEM
+ entries. Note that if the PEM entry is of type
'SubjectPublickeyInfo' it will be further decoded to an
rsa_public_key() or dsa_public_key().</p>
</desc>
@@ -222,7 +245,7 @@
<func>
<name>pem_entry_encode(Asn1Type, Entity) -> pem_entry()</name>
<name>pem_entry_encode(Asn1Type, Entity, {CipherInfo, Password}) -> pem_entry()</name>
- <fsummary> Creates a pem entry that can be fed to pem_encode/1.</fsummary>
+ <fsummary> Creates a PEM entry that can be fed to pem_encode/1.</fsummary>
<type>
<v>Asn1Type = pki_asn1_type()</v>
<v>Entity = term()</v>
@@ -236,7 +259,7 @@
<v>Password = string()</v>
</type>
<desc>
- <p> Creates a pem entry that can be feed to pem_encode/1.</p>
+ <p> Creates a PEM entry that can be feed to pem_encode/1.</p>
</desc>
</func>
@@ -266,12 +289,12 @@
<func>
<name>pkix_decode_cert(Cert, otp|plain) -> #'Certificate'{} | #'OTPCertificate'{}</name>
- <fsummary> Decodes an ASN.1 der encoded pkix x509 certificate.</fsummary>
+ <fsummary> Decodes an ASN.1 DER encoded PKIX x509 certificate.</fsummary>
<type>
<v>Cert = der_encoded()</v>
</type>
<desc>
- <p>Decodes an ASN.1 der encoded pkix certificate. The otp option
+ <p>Decodes an ASN.1 DER encoded PKIX certificate. The otp option
will use the customized ASN.1 specification OTP-PKIX.asn1 for
decoding and also recursively decode most of the standard
parts.</p>
@@ -280,14 +303,15 @@
<func>
<name>pkix_encode(Asn1Type, Entity, otp | plain) -> der_encoded()</name>
- <fsummary>Der encodes a pkix x509 certificate or part of such a
+ <fsummary>DER encodes a PKIX x509 certificate or part of such a
certificate.</fsummary>
<type>
<v>Asn1Type = atom()</v>
<d>The ASN.1 type can be 'Certificate', 'OTPCertificate' or a subtype of either .</d>
+ <v>Entity = #'Certificate'{} | #'OTPCertificate'{} | a valid subtype</v>
</type>
<desc>
- <p>Der encodes a pkix x509 certificate or part of such a
+ <p>DER encodes a PKIX x509 certificate or part of such a
certificate. This function must be used for encoding certificates or parts of certificates
that are decoded/created in the otp format, whereas for the plain format this
function will directly call der_encode/2. </p>
@@ -357,18 +381,104 @@
</desc>
</func>
- <!-- <func> -->
- <!-- <name>pkix_path_validation()</name> -->
- <!-- <fsummary> Performs a basic path validation according to RFC 5280.</fsummary> -->
- <!-- <type> -->
- <!-- <v></v> -->
- <!-- </type> -->
- <!-- <desc> -->
- <!-- <p> Performs a basic path validation according to RFC 5280.</p> -->
- <!-- </desc> -->
- <!-- </func> -->
+ <func>
+ <name>pkix_path_validation(TrustedCert, CertChain, Options) -> {ok, {PublicKeyInfo, PolicyTree}} | {error, {bad_cert, Reason}} </name>
+ <fsummary> Performs a basic path validation according to RFC 5280.</fsummary>
+ <type>
+ <v> TrustedCert = #'OTPCertificate'{} | der_encode() | unknown_ca | selfsigned_peer </v>
+ <d>Normally a trusted certificate but it can also be one of the path validation
+ errors <c>unknown_ca </c> or <c>selfsigned_peer </c> that can be discovered while
+ constructing the input to this function and that should be run through the <c>verify_fun</c>.</d>
+ <v> CertChain = [der_encode()]</v>
+ <d>A list of DER encoded certificates in trust order ending with the peer certificate.</d>
+ <v> Options = proplists:proplists()</v>
+ <v>PublicKeyInfo = {?'rsaEncryption' | ?'id-dsa',
+ rsa_public_key() | integer(), 'NULL' | 'Dss-Parms'{}}</v>
+ <v> PolicyTree = term() </v>
+ <d>At the moment this will always be an empty list as Policies are not currently supported</d>
+ <v> Reason = cert_expired | invalid_issuer | invalid_signature | unknown_ca |
+ selfsigned_peer | name_not_permitted | missing_basic_constraint | invalid_key_usage | crl_reason()
+ </v>
+ </type>
+ <desc>
+ <p>
+ Performs a basic path validation according to
+ <url href="http://www.ietf.org/rfc/rfc5280.txt">RFC 5280.</url>
+ However CRL validation is done separately by <seealso
+ marker="public_key#pkix_crls_validate-3">pkix_crls_validate/3 </seealso> and should be called
+ from the supplied <c>verify_fun</c>
+ </p>
+
+ <taglist>
+ <p> Available options are: </p>
+
+ <tag>{verify_fun, fun()}</tag>
+ <item>
+ <p>The fun should be defined as:</p>
+
+ <code>
+fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom()} |
+ {extension, #'Extension'{}},
+ InitialUserState :: term()) ->
+ {valid, UserState :: term()} | {valid_peer, UserState :: term()} |
+ {fail, Reason :: term()} | {unknown, UserState :: term()}.
+ </code>
+
+ <p>If the verify callback fun returns {fail, Reason}, the
+ verification process is immediately stopped. If the verify
+ callback fun returns {valid, UserState}, the verification
+ process is continued, this can be used to accept specific path
+ validation errors such as <c>selfsigned_peer</c> as well as
+ verifying application specific extensions. If called with an
+ extension unknown to the user application the return value
+ {unknown, UserState} should be used.</p>
+
+ </item>
+ <tag>{max_path_length, integer()}</tag>
+ <item>
+ The <c>max_path_length</c> is the maximum number of non-self-issued
+ intermediate certificates that may follow the peer certificate
+ in a valid certification path. So if <c>max_path_length</c> is 0 the PEER must
+ be signed by the trusted ROOT-CA directly, if 1 the path can
+ be PEER, CA, ROOT-CA, if it is 2 PEER, CA, CA, ROOT-CA and so
+ on.
+ </item>
+ </taglist>
+ </desc>
+ </func>
+
+ <func>
+ <name>pkix_crls_validate(OTPCertificate, DPAndCRLs, Options) -> CRLStatus()</name>
+ <fsummary> Performs CRL validation.</fsummary>
+ <type>
+ <v> OTPCertificate = #'OTPCertificate'{}</v>
+ <v> DPAndCRLs = [{DP::#'DistributionPoint'{} ,CRL::#'CertificateList'{}}] </v>
+ <v> Options = proplists:proplists()</v>
+ <v> CRLStatus() = valid | {bad_cert, revocation_status_undetermined} |
+ {bad_cert, {revoked, crl_reason()}}</v>
+ </type>
+ <desc>
+ <p> Performs CRL validation. It is intended to be called from
+ the verify fun of <seealso marker="public_key#pkix_path_validation-3"> pkix_path_validation/3
+ </seealso></p>
+ <taglist>
+ <p> Available options are: </p>
+ <tag>{update_crl, fun()}</tag>
+ <item>
+ <p>The fun has the following type spec:</p>
+
+ <code> fun(#'DistributionPoint'{}, #'CertificateList'{}) -> #'CertificateList'{}</code>
+
+ <p>The fun should use the information in the distribution point to acesses
+ the lates possible version of the CRL. If this fun is not specified
+ public_key will use the default implementation:
+ </p>
+ <code> fun(_DP, CRL) -> CRL end</code>
+ </item>
+ </taglist>
+ </desc>
+ </func>
-
<func>
<name>pkix_sign(#'OTPTBSCertificate'{}, Key) -> der_encode()</name>
<fsummary>Signs certificate.</fsummary>
@@ -389,7 +499,7 @@
<v>Key = rsa_public_key() | dsa_public_key()</v>
</type>
<desc>
- <p> Verify pkix x.509 certificate signature.</p>
+ <p> Verify PKIX x.509 certificate signature.</p>
</desc>
</func>