Pem To Pkcs

PKCS # 12 or PFX - a binary format used to store intermediate certificates, server certificates, and private key in a single file. Extensions of PFX-file -.pfx and.p12. Most of these files are used on Windows machines for the purpose of import and export for private keys and certificates.

  1. PHP SDK users don't need to convert their PEM certificate to the.p12 format. Open a command prompt and navigate to the directory that contains the certkeypem.txt file. Execute the following OpenSSL command to create a PKCS12 (.p12) file: openssl pkcs12 -export -inkey certkeypem.txt -in certkeypem.txt -out certkey.p12.
  2. Our SSL Converter allows you to quickly and easily convert SSL Certificates into 6 formats such as PEM, DER, PKCS#7, P7B, PKCS#12 and PFX. Depending on the server configuration (Windows, Apache, Java), it may be necessary to convert your SSL certificates from one format to another.

SYNOPSIS

openssl pkcs8 [-help] [-topk8] [-informPEMDER] [-outformPEMDER] [-infilename] [-passinarg] [-outfilename] [-passoutarg] [-itercount] [-noiter] [-randfile...] [-writerandfile] [-nocrypt] [-traditional] [-v2alg] [-v2prfalg] [-v1alg] [-engineid] [-scrypt] [-scrypt_NN] [-scrypt_rr] [-scrypt_pp]

DESCRIPTION

Normally a PKCS#8 private key is expected on input and a private key will be written to the output file. With the -topk8 option the situation is reversed: it reads a private key and writes a PKCS#8 format key. The pkcs8 command processes private keys in PKCS#8 format. It can handle both unencrypted PKCS#8 PrivateKeyInfo format and EncryptedPrivateKeyInfo format with a variety of PKCS#5 (v1.5 and v2.0) and PKCS#12 algorithms.

Options

-help

Print out a usage message.

-topk8

The pkcs8 command processes private keys in PKCS#8 format. It can handle both unencrypted PKCS#8 PrivateKeyInfo format and EncryptedPrivateKeyInfo format with a variety of PKCS#5 (v1.5 and v2.0) and PKCS#12 algorithms.

-informDERPEM

This specifies the input format: see KEY FORMATS for more details. The default format is PEM.

-outformDERPEM

This specifies the output format: see KEY FORMATS for more details. The default format is PEM.

-traditional

When this option is present and -topk8 is not a traditional format private key is written.

Pem To Pkcs
-infilename

specifies the input file name to read a key from or standard input if this option is not specified. If the key is encrypted a pass phrase will be prompted for.

-passinarg

specifies the input file password source. For more information about the format of arg, see the PASS PHRASE ARGUMENTS section in the openssl reference page.

-outfilename

specifies the output file name to write a key to or standard output by default. If any encryption options are set then a pass phrase will be prompted for. The output file name should not be the same as the input file name.

-passoutarg

specifies the output file password source. For more information about the format of arg, see the PASS PHRASE ARGUMENTS section in the openssl reference page.

-itercount

When creating new PKCS#8 containers, use a given number of iterations on the password in deriving the encryption key for the PKCS#8 output. High values increase the time required to brute-force a PKCS#8 container.

Pkcs vs pem
-nocrypt

PKCS#8 keys generated or input are normally PKCS#8 EncryptedPrivateKeyInfo structures using an appropriate password based encryption algorithm. With this option an unencrypted PrivateKeyInfo structure is expected or output. This option does not encrypt private keys at all and should only be used when absolutely necessary. Certain software such as some versions of Java code signing software used unencrypted private keys.

-randfile...

A file or files containing random data used to seed the random number generator. Multiple files can be specified separated by an OS-dependent character. The separator is ; for MS-Windows, , for OpenVMS, and : for all others.

-writerandfile

Writes random data to the specified file upon exit. This can be used with a subsequent -rand flag.

-v2alg

This option sets the PKCS#5 v2.0 algorithm.

The alg argument is the encryption algorithm to use, valid values include aes128, aes256 and des3. If this option isn't specified then aes256 is used.

-v2prfalg

This option sets the PRF algorithm to use with PKCS#5 v2.0. A typical value value would be hmacWithSHA256. If this option isn't set then the default for the cipher is used or hmacWithSHA256 if there is no default.

Some implementations may not support custom PRF algorithms and may require the hmacWithSHA1 option to work.

-v1alg

This option indicates a PKCS#5 v1.5 or PKCS#12 algorithm should be used. Some older implementations may not support PKCS#5 v2.0 and may require this option. If not specified PKCS#5 v2.0 form is used.

-engineid

specifying an engine (by its unique id string) will cause pkcs8 to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.

-scrypt

Uses the scrypt algorithm for private key encryption using default parameters: currently N=16384, r=8 and p=1 and AES in CBC mode with a 256 bit key. These parameters can be modified using the -scrypt_N, -scrypt_r, -scrypt_p and -v2 options.

-scrypt_NN
-scrypt_rr
-scrypt_pp

Sets the scrypt N, r or p parameters.

KEY FORMATS

Various different formats are used by the pkcs8 utility. These are detailed below.

If a key is being converted from PKCS#8 form (i.e. the -topk8 option is not used) then the input file must be in PKCS#8 format. An encrypted key is expected unless -nocrypt is included.

If -topk8 is not used and PEM mode is set the output file will be an unencrypted private key in PKCS#8 format. If the -traditional option is used then a traditional format private key is written instead.

If -topk8 is not used and DER mode is set the output file will be an unencrypted private key in traditional DER format.

If -topk8 is used then any supported private key can be used for the input file in a format specified by -inform. The output file will be encrypted PKCS#8 format using the specified encryption parameters unless -nocrypt is included.

NOTES

By default, when converting a key to PKCS#8 format, PKCS#5 v2.0 using 256 bit AES with HMAC and SHA256 is used.

Some older implementations do not support PKCS#5 v2.0 format and require the older PKCS#5 v1.5 form instead, possibly also requiring insecure weak encryption algorithms such as 56 bit DES.

The encrypted form of a PEM encode PKCS#8 files uses the following headers and footers:

The unencrypted form uses:

P7b To Pem

Private keys encrypted using PKCS#5 v2.0 algorithms and high iteration counts are more secure that those encrypted using the traditional SSLeay compatible formats. So if additional security is considered important the keys should be converted.

It is possible to write out DER encoded encrypted private keys in PKCS#8 format because the encryption details are included at an ASN1 level whereas the traditional format includes them at a PEM level.

PKCS#5 v1.5 and PKCS#12 algorithms.

Various algorithms can be used with the -v1 command line option, including PKCS#5 v1.5 and PKCS#12. These are described in more detail below.

PBE-MD2-DES

Pem To Pkcs1

PBE-MD5-DES

These algorithms were included in the original PKCS#5 v1.5 specification. They only offer 56 bits of protection since they both use DES.

PBE-SHA1-RC2-64
PBE-MD2-RC2-64
PBE-MD5-RC2-64
PBE-SHA1-DES

These algorithms are not mentioned in the original PKCS#5 v1.5 specification but they use the same key derivation algorithm and are supported by some software. They are mentioned in PKCS#5 v2.0. They use either 64 bit RC2 or 56 bit DES.

PBE-SHA1-RC4-128
PBE-SHA1-RC4-40
PBE-SHA1-3DES
PBE-SHA1-2DES

Pem To Pkcs12 Windows

PBE-SHA1-RC2-128
PBE-SHA1-RC2-40

These algorithms use the PKCS#12 password based encryption algorithm and allow strong encryption algorithms like triple DES or 128 bit RC2 to be used.

EXAMPLES

Convert a private key to PKCS#8 format using default parameters (AES with 256 bit key and hmacWithSHA256):

Convert a private key to PKCS#8 unencrypted format:

Convert a private key to PKCS#5 v2.0 format using triple DES:

Convert a private key to PKCS#5 v2.0 format using AES with 256 bits in CBC mode and hmacWithSHA512 PRF:

Convert a private key to PKCS#8 using a PKCS#5 1.5 compatible algorithm (DES):

Convert a private key to PKCS#8 using a PKCS#12 compatible algorithm (3DES):

Read a DER unencrypted PKCS#8 format private key:

Convert a private key from any PKCS#8 encrypted format to traditional format:

Convert a private key to PKCS#8 format, encrypting with AES-256 and with one million iterations of the password:

STANDARDS

Test vectors from this PKCS#5 v2.0 implementation were posted to the pkcs-tng mailing list using triple DES, DES and RC2 with high iteration counts, several people confirmed that they could decrypt the private keys produced and Therefore it can be assumed that the PKCS#5 v2.0 implementation is reasonably accurate at least as far as these algorithms are concerned.

The format of PKCS#8 DSA (and other) private keys is not well documented: it is hidden away in PKCS#11 v2.01, section 11.9. OpenSSL's default DSA PKCS#8 private key format complies with this standard.

BUGS

There should be an option that prints out the encryption algorithm in use and other details such as the iteration count.

COPYRIGHT

Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.

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 here: OpenSSL.

AVAILABILITY

PTC MKS Toolkit for System Administrators
PTC MKS Toolkit for Developers
PTC MKS Toolkit for Interoperability
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition

SEE ALSO

Commands:
openssl dsa, openssl gendsa, openssl genrsa, openssl rsa

PTC MKS Toolkit 10.3 Documentation Build 39.

Pem To Pkcs Free