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<img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/public_key-0.17.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>public_key</strong><br><strong>Reference Manual</strong><br><small>Version 0.17</small></p>
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<li title="decrypt_private-2"><a href="public_key.html#decrypt_private-2">decrypt_private/2</a></li>
<li title="decrypt_private-3"><a href="public_key.html#decrypt_private-3">decrypt_private/3</a></li>
<li title="decrypt_public-2"><a href="public_key.html#decrypt_public-2">decrypt_public/2</a></li>
<li title="decrypt_public-3"><a href="public_key.html#decrypt_public-3">decrypt_public/3</a></li>
<li title="der_decode-2"><a href="public_key.html#der_decode-2">der_decode/2</a></li>
<li title="der_encode-2"><a href="public_key.html#der_encode-2">der_encode/2</a></li>
<li title="pem_decode-1"><a href="public_key.html#pem_decode-1">pem_decode/1</a></li>
<li title="pem_encode-1"><a href="public_key.html#pem_encode-1">pem_encode/1</a></li>
<li title="pem_entry_decode-1"><a href="public_key.html#pem_entry_decode-1">pem_entry_decode/1</a></li>
<li title="pem_entry_decode-2"><a href="public_key.html#pem_entry_decode-2">pem_entry_decode/2</a></li>
<li title="pem_entry_encode-2"><a href="public_key.html#pem_entry_encode-2">pem_entry_encode/2</a></li>
<li title="pem_entry_encode-3"><a href="public_key.html#pem_entry_encode-3">pem_entry_encode/3</a></li>
<li title="encrypt_private-2"><a href="public_key.html#encrypt_private-2">encrypt_private/2</a></li>
<li title="encrypt_public-2"><a href="public_key.html#encrypt_public-2">encrypt_public/2</a></li>
<li title="pkix_decode_cert-2"><a href="public_key.html#pkix_decode_cert-2">pkix_decode_cert/2</a></li>
<li title="pkix_encode-3"><a href="public_key.html#pkix_encode-3">pkix_encode/3</a></li>
<li title="pkix_is_issuer-2"><a href="public_key.html#pkix_is_issuer-2">pkix_is_issuer/2</a></li>
<li title="pkix_is_fixed_dh_cert-1"><a href="public_key.html#pkix_is_fixed_dh_cert-1">pkix_is_fixed_dh_cert/1</a></li>
<li title="pkix_is_self_signed-1"><a href="public_key.html#pkix_is_self_signed-1">pkix_is_self_signed/1</a></li>
<li title="pkix_issuer_id-2"><a href="public_key.html#pkix_issuer_id-2">pkix_issuer_id/2</a></li>
<li title="pkix_normalize_name-1"><a href="public_key.html#pkix_normalize_name-1">pkix_normalize_name/1</a></li>
<li title="pkix_sign-2"><a href="public_key.html#pkix_sign-2">pkix_sign/2</a></li>
<li title="pkix_verify-2"><a href="public_key.html#pkix_verify-2">pkix_verify/2</a></li>
<li title="sign-3"><a href="public_key.html#sign-3">sign/3</a></li>
<li title="ssh_decode-2"><a href="public_key.html#ssh_decode-2">ssh_decode/2</a></li>
<li title="ssh_encode-2"><a href="public_key.html#ssh_encode-2">ssh_encode/2</a></li>
<li title="verify-4"><a href="public_key.html#verify-4">verify/4</a></li>
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<!-- refpage --><center><h1>public_key</h1></center>
<h3>MODULE</h3>
<div class="REFBODY">public_key</div>
<h3>MODULE SUMMARY</h3>
<div class="REFBODY"> API module for public key infrastructure.</div>
<h3>DESCRIPTION</h3>
<div class="REFBODY"><p>
<p>This module provides functions to handle public key infrastructure
from <span class="bold_code"><a href="http://www.ietf.org/rfc/rfc5280.txt">RFC 5280</a></span>- X.509 certificates and some parts of the PKCS-standard.
</p>
</p></div>
<h3><a name="id60156">COMMON DATA TYPES </a></h3>
<div class="REFBODY">
<div class="note">
<div class="label">Note</div>
<div class="content"><p><p>All records used in this manual
are generated from ASN.1 specifications
and are documented in the User's Guide. See <span class="bold_code"><a href="public_key_records.html">Public key records</a></span> and <span class="bold_code"><a href="cert_records.html">X.509 Certificate records</a></span>.
</p></p></div>
</div>
<p>Use the following include directive to get access to the
records and constant macros described here and in the User's Guide.</p>
<div class="example"><pre> -include_lib("public_key/include/public_key.hrl"). </pre></div>
<p><strong>Data Types </strong></p>
<p><div class="example"><pre>boolean() = true | false</pre></div></p>
<p><div class="example"><pre>string = [bytes()]</pre></div></p>
<p><div class="example"><pre>pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'| 'RSAPublicKey'
'DSAPrivateKey' | 'DSAPublicKey' | 'DHParameter' | 'SubjectPublicKeyInfo'| 'PrivateKeyInfo' | 'CertificationRequest'</pre></div></p>
<p><div class="example"><pre>pem_entry () = {pki_asn1_type(), binary(), %% DER or encrypted DER
not_encrypted | cipher_info()} </pre></div></p>
<p><div class="example"><pre>cipher_info() = {"RC2-CBC | "DES-CBC" | "DES-EDE3-CBC", crypto:rand_bytes(8)} |
'PBES2-params'} </pre></div></p>
<p><div class="example"><pre>rsa_public_key() = #'RSAPublicKey'{}</pre></div></p>
<p><div class="example"><pre>rsa_private_key() = #'RSAPrivateKey'{} </pre></div></p>
<p><div class="example"><pre>dsa_public_key() = {integer(), #'Dss-Parms'{}} </pre></div></p>
<p><div class="example"><pre>dsa_private_key() = #'DSAPrivateKey'{}</pre></div></p>
<p><div class="example"><pre> public_crypt_options() = [{rsa_pad, rsa_padding()}]. </pre></div></p>
<p><div class="example"><pre> rsa_padding() = 'rsa_pkcs1_padding' | 'rsa_pkcs1_oaep_padding'
| 'rsa_no_padding'</pre></div></p>
<p><div class="example"><pre> rsa_digest_type() = 'md5' | 'sha' | 'sha224' | 'sha256' | 'sha384' | 'sha512' </pre></div></p>
<p><div class="example"><pre> dss_digest_type() = 'sha' </pre></div></p>
<p><div class="example"><pre> ssh_file() = openssh_public_key | rfc4716_public_key |
known_hosts | auth_keys </pre></div></p>
</div>
<h3>EXPORTS</h3>
<p><a name="decrypt_private-2"><span class="bold_code">decrypt_private(CipherText, Key) -> binary()</span></a><br><a name="decrypt_private-3"><span class="bold_code">decrypt_private(CipherText, Key, Options) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">CipherText = binary()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_private_key()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Options = public_crypt_options()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Public key decryption using the private key.</p>
</p></div>
<p><a name="decrypt_public-2"><span class="bold_code">decrypt_public(CipherText, Key) - > binary()</span></a><br><a name="decrypt_public-3"><span class="bold_code">decrypt_public(CipherText, Key, Options) - > binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">CipherText = binary()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_public_key()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Options = public_crypt_options()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Public key decryption using the public key.</p>
</p></div>
<p><a name="der_decode-2"><span class="bold_code">der_decode(Asn1type, Der) -> term()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Asn1Type = atom()</span><br>
</div>
<div class="REFBODY"> ASN.1 type present in the public_key applications
asn1 specifications.</div>
<div class="REFTYPES">
<span class="bold_code">Der = der_encoded()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Decodes a public key ASN.1 der encoded entity.</p>
</p></div>
<p><a name="der_encode-2"><span class="bold_code">der_encode(Asn1Type, Entity) -> der_encoded()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Asn1Type = atom()</span><br>
</div>
<div class="REFBODY"> Asn1 type present in the public_key applications
ASN.1 specifications.</div>
<div class="REFTYPES">
<span class="bold_code">Entity = term()</span><br>
</div>
<div class="REFBODY">The erlang representation of <span class="code">Asn1Type</span>
</div>
</div>
<div class="REFBODY"><p>
<p> Encodes a public key entity with ASN.1 DER encoding.</p>
</p></div>
<p><a name="pem_decode-1"><span class="bold_code">pem_decode(PemBin) -> [pem_entry()]</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">PemBin = binary()</span><br>
</div>
<div class="REFBODY">Example {ok, PemBin} = file:read_file("cert.pem").</div>
</div>
<div class="REFBODY"><p>
<p>Decode PEM binary data and return
entries as ASN.1 der encoded entities.</p>
</p></div>
<p><a name="pem_encode-1"><span class="bold_code">pem_encode(PemEntries) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code"> PemEntries = [pem_entry()] </span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Creates a PEM binary</p>
</p></div>
<p><a name="pem_entry_decode-1"><span class="bold_code">pem_entry_decode(PemEntry) -> term()</span></a><br><a name="pem_entry_decode-2"><span class="bold_code">pem_entry_decode(PemEntry, Password) -> term()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code"> PemEntry = pem_entry() </span><br>
</div>
<div class="REFTYPES">
<span class="bold_code"> Password = string() </span><br>
</div>
</div>
<div class="REFBODY"><p>
<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>
</p></div>
<p><a name="pem_entry_encode-2"><span class="bold_code">pem_entry_encode(Asn1Type, Entity) -> pem_entry()</span></a><br><a name="pem_entry_encode-3"><span class="bold_code">pem_entry_encode(Asn1Type, Entity, {CipherInfo, Password}) -> pem_entry()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Asn1Type = pki_asn1_type()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Entity = term()</span><br>
</div>
<div class="REFBODY">The Erlang representation of
<span class="code">Asn1Type</span>. If <span class="code">Asn1Type</span> is 'SubjectPublicKeyInfo'
then <span class="code">Entity</span> must be either an rsa_public_key() or a
dsa_public_key() and this function will create the appropriate
'SubjectPublicKeyInfo' entry.
</div>
<div class="REFTYPES">
<span class="bold_code">CipherInfo = cipher_info()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Password = string()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Creates a pem entry that can be feed to pem_encode/1.</p>
</p></div>
<p><a name="encrypt_private-2"><span class="bold_code">encrypt_private(PlainText, Key) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">PlainText = binary()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_private_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Public key encryption using the private key.</p>
</p></div>
<p><a name="encrypt_public-2"><span class="bold_code">encrypt_public(PlainText, Key) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">PlainText = binary()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_public_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Public key encryption using the public key.</p>
</p></div>
<p><a name="pkix_decode_cert-2"><span class="bold_code">pkix_decode_cert(Cert, otp|plain) -> #'Certificate'{} | #'OTPCertificate'{}</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encoded()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<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>
</p></div>
<p><a name="pkix_encode-3"><span class="bold_code">pkix_encode(Asn1Type, Entity, otp | plain) -> der_encoded()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Asn1Type = atom()</span><br>
</div>
<div class="REFBODY">The ASN.1 type can be 'Certificate', 'OTPCertificate' or a subtype of either .</div>
</div>
<div class="REFBODY"><p>
<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>
</p></div>
<p><a name="pkix_is_issuer-2"><span class="bold_code">pkix_is_issuer(Cert, IssuerCert) -> boolean()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encode() | #'OTPCertificate'{}</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">IssuerCert = der_encode() | #'OTPCertificate'{}</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Checks if <span class="code">IssuerCert</span> issued <span class="code">Cert</span> </p>
</p></div>
<p><a name="pkix_is_fixed_dh_cert-1"><span class="bold_code">pkix_is_fixed_dh_cert(Cert) -> boolean()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encode() | #'OTPCertificate'{}</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Checks if a Certificate is a fixed Diffie-Hellman Cert.</p>
</p></div>
<p><a name="pkix_is_self_signed-1"><span class="bold_code">pkix_is_self_signed(Cert) -> boolean()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encode() | #'OTPCertificate'{}</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Checks if a Certificate is self signed.</p>
</p></div>
<p><a name="pkix_issuer_id-2"><span class="bold_code">pkix_issuer_id(Cert, IssuedBy) -> {ok, IssuerID} | {error, Reason}</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encode() | #'OTPCertificate'{}</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">IssuedBy = self | other</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">IssuerID = {integer(), {rdnSequence, [#'AttributeTypeAndValue'{}]}}</span><br>
</div>
<div class="REFBODY">The issuer id consists of the serial number and the issuers name.</div>
<div class="REFTYPES">
<span class="bold_code">Reason = term()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Returns the issuer id.</p>
</p></div>
<p><a name="pkix_normalize_name-1"><span class="bold_code">pkix_normalize_name(Issuer) -> Normalized</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Issuer = {rdnSequence,[#'AttributeTypeAndValue'{}]}</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Normalized = {rdnSequence, [#'AttributeTypeAndValue'{}]}</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Normalizes a issuer name so that it can be easily
compared to another issuer name.</p>
</p></div>
<p><a name="pkix_sign-2"><span class="bold_code">pkix_sign(#'OTPTBSCertificate'{}, Key) -> der_encode()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_public_key() | dsa_public_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Signs a 'OTPTBSCertificate'. Returns the corresponding
der encoded certificate.</p>
</p></div>
<p><a name="pkix_verify-2"><span class="bold_code">pkix_verify(Cert, Key) -> boolean()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Cert = der_encode()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_public_key() | dsa_public_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Verify pkix x.509 certificate signature.</p>
</p></div>
<p><a name="sign-3"><span class="bold_code">sign(Msg, DigestType, Key) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Msg = binary() | {digest,binary()}</span><br>
</div>
<div class="REFBODY">The msg is either the binary "plain text" data to be
signed or it is the hashed value of "plain text" i.e. the
digest.</div>
<div class="REFTYPES">
<span class="bold_code">DigestType = rsa_digest_type() | dss_digest_type()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_private_key() | dsa_private_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p> Creates a digital signature.</p>
</p></div>
<p><a name="ssh_decode-2"><span class="bold_code">ssh_decode(SshBin, Type) -> [{public_key(), Attributes::list()}]</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">SshBin = binary()</span><br>
</div>
<div class="REFBODY">Example {ok, SshBin} = file:read_file("known_hosts").</div>
<div class="REFTYPES">
<span class="bold_code"> Type = public_key | ssh_file()</span><br>
</div>
<div class="REFBODY">If <span class="code">Type</span> is <span class="code">public_key</span> the binary may be either
a rfc4716 public key or a openssh public key.</div>
</div>
<div class="REFBODY"><p>
<p> Decodes a ssh file-binary. In the case of know_hosts or
auth_keys the binary may include one or more lines of the
file. Returns a list of public keys and their attributes, possible
attribute values depends on the file type represented by the
binary.
</p>
<dl>
<dt><strong>rfc4716 attributes - see RFC 4716</strong></dt>
<dd>{headers, [{string(), utf8_string()}]}</dd>
<dt><strong>auth_key attributes - see man sshd </strong></dt>
<dd>{comment, string()}</dd>
<dd>{options, [string()]}</dd>
<dd>{bits, integer()} - In ssh version 1 files</dd>
<dt><strong>known_host attributes - see man sshd</strong></dt>
<dd>{hostnames, [string()]}</dd>
<dd>{comment, string()}</dd>
<dd>{bits, integer()} - In ssh version 1 files</dd>
</dl>
</p></div>
<p><a name="ssh_encode-2"><span class="bold_code">ssh_encode([{Key, Attributes}], Type) -> binary()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Key = public_key()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Attributes = list()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Type = ssh_file()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Encodes a list of ssh file entries (public keys and attributes) to a binary. Possible
attributes depends on the file type, see <span class="bold_code"><a href="#ssh_decode-2"> ssh_decode/2 </a></span></p>
</p></div>
<p><a name="verify-4"><span class="bold_code">verify(Msg, DigestType, Signature, Key) -> boolean()</span></a><br></p>
<div class="REFBODY">
<p>Types:</p>
<div class="REFTYPES">
<span class="bold_code">Msg = binary() | {digest,binary()}</span><br>
</div>
<div class="REFBODY">The msg is either the binary "plain text" data
or it is the hashed value of "plain text" i.e. the digest.</div>
<div class="REFTYPES">
<span class="bold_code">DigestType = rsa_digest_type() | dss_digest_type()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Signature = binary()</span><br>
</div>
<div class="REFTYPES">
<span class="bold_code">Key = rsa_public_key() | dsa_public_key()</span><br>
</div>
</div>
<div class="REFBODY"><p>
<p>Verifies a digital signature</p>
</p></div>
</div>
<div class="footer">
<hr>
<p>Copyright © 2008-2012 Ericsson AB, All Rights Reserved</p>
</div>
</div>
</div></body>
</html>
distrib
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Fedora
>
17
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i386
>
media
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updates
>
by-pkgid
>
675c8c8167236dfcf8d66da674f931e8
>
files
>
1216
