Base64 decode mac os

Base64Anywhere 4+

John Bowers

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Description

Base64Anywhere is a OSX service and application that allows you to encode files from a right click context menu in Finder, as well as allowing you to encode text as Base64 or decode from Base64 with a right click from IDE’s, text editor’s, terminals, etc.

There are many Base64 encoders/decoders, but Base64Anywhere is about allowing you do your encoding or decoding contextually. Wherever you see a file or text that needs encoding or decoding, you can simply select and right click to perform the operation you need.

* Base64 encodes whole files (including JPGs/PNGs/etc) with a single click from finder, and easily formats base64 encoded images for inclusion in CSS or web pages.

* Encode or Decode text inline if you application supports it (text editors, programming IDE’s, etc) or you can send the text to the Base64 interface where it will be displayed with its encoded and unencoded representations.

* When decoding Base64 encoded data, binary data will be shown in Hex, with the option of revealing printable characters. This is very handy for reverse engineering Base64 encoded data structures.

* When decoding Base64 images, the data will be recognized as an image and instead of seeing the decoded bytes, an image will be displayed.

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Как кодировать base64 через командную строку?

Есть ли в Mac OS X команда терминала, которая будет base64 кодировать файл или стандартный ввод?

openssl может сделать это для вас, и все это установлено с OS X по умолчанию; нет необходимости устанавливать darwinports.

Без -in опции читает из стандартного ввода

Openssl можно использовать более кратко:

[echo -n -> необходимо использовать, иначе будет выполнено кодирование, включая символ новой строки]

Это должно быть доступно по умолчанию на OS X.

base64 команда доступна по умолчанию на моем OS X 10.9.4.

Вы можете использовать base64 и base64 -D для кодирования и декодирования строки в терминале, или base64 -in file и base64 -D -in file для кодирования и декодирования файла.

Поскольку Python поставляется с OS X по умолчанию, вы можете использовать его, как показано ниже:

Или установите coreutils через Brew ( brew install coreutils ), которая будет предоставлять base64 команду:

В macOS я всегда использую:

echo -n «STRING» | base64

-n — избегать символа новой строки в конце строки.

С точки зрения скорости, я бы использовал openssl, за которым следует perl, а затем uuencode. С точки зрения переносимости, я бы использовал uuencode, за которым следует Perl, за которым следует openssl (если вы хотите повторно использовать код на как можно большем количестве других UNIX-подобных платформ). Будьте осторожны, поскольку не все варианты UNIX поддерживают ключ -m (iirc AIX поддерживает, HP / UX поддерживает Solaris).

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Base64 Encoding of «mac»

Encode files to Base64 format

Meet Base64 Decode and Encode, a simple online tool that does exactly what it says: decodes from Base64 encoding as well as encodes into it quickly and easily. Base64 encode your data without hassles or decode it into a human-readable format.

Base64 encoding schemes are commonly used when there is a need to encode binary data, especially when that data needs to be stored and transferred over media that are designed to deal with text. This encoding helps to ensure that the data remains intact without modification during transport. Base64 is used commonly in a number of applications including email via MIME, as well as storing complex data in XML or JSON.

Advanced options

• Character set: Our website uses the UTF-8 character set, so your input data is transmitted in that format. Change this option if you want to convert the data to another character set before encoding. Note that in case of text data, the encoding scheme does not contain the character set, so you may have to specify the appropriate set during the decoding process. As for files, the binary option is the default, which will omit any conversion; this option is required for everything except plain text documents.
• Newline separator: Unix and Windows systems use different line break characters, so prior to encoding either variant will be replaced within your data by the selected option. For the files section, this is partially irrelevant since files already contain the corresponding separators, but you can define which one to use for the «encode each line separately» and «split lines into chunks» functions.
• Encode each line separately: Even newline characters are converted to their Base64 encoded forms. Use this option if you want to encode multiple independent data entries separated with line breaks. (*)
• Split lines into chunks: The encoded data will become a continuous text without any whitespaces, so check this option if you want to break it up into multiple lines. The applied character limit is defined in the MIME (RFC 2045) specification, which states that the encoded lines must be no more than 76 characters long. (*)
• Perform URL-safe encoding: Using standard Base64 in URLs requires encoding of «+», «/» and «=» characters into their percent-encoded form, which makes the string unnecessarily longer. Enable this option to encode into an URL- and filename- friendly Base64 variant (RFC 4648 / Base64URL) where the «+» and «/» characters are respectively replaced by «-» and «_», as well as the padding «=» signs are omitted.
• Live mode: When you turn on this option the entered data is encoded immediately with your browser’s built-in JavaScript functions, without sending any information to our servers. Currently this mode supports only the UTF-8 character set.

(*) These options cannot be enabled simultaneously since the resulting output would not be valid for the majority of applications.

Safe and secure

All communications with our servers come through secure SSL encrypted connections (https). We delete uploaded files from our servers immediately after being processed and the resulting downloadable file is deleted right after the first download attempt or 15 minutes of inactivity (whichever is shorter). We do not keep or inspect the contents of the submitted data or uploaded files in any way. Read our privacy policy below for more details.

Our tool is free to use. From now on, you don’t need to download any software for such simple tasks.

Details of the Base64 encoding

Base64 is a generic term for a number of similar encoding schemes that encode binary data by treating it numerically and translating it into a base-64 representation. The Base64 term originates from a specific MIME-content transfer encoding.

The particular choice of characters to make up the 64 characters required for Base64 varies between implementations. The general rule is to choose a set of 64 characters that is both 1) part of a subset common to most encodings, and 2) also printable. This combination leaves the data unlikely to be modified in transit through systems such as email, which were traditionally not 8-bit clean. For example, MIME’s Base64 implementation uses A-Z, a-z, and 0-9 for the first 62 values, as well as «+» and «/» for the last two. Other variations, usually derived from Base64, share this property but differ in the symbols chosen for the last two values; an example is the URL and filename safe «RFC 4648 / Base64URL» variant, which uses «-» and «_».

Here’s a quote snippet from Thomas Hobbes’s Leviathan:

«Man is distinguished, not only by his reason, but . «

This is represented as an ASCII byte sequence and encoded in MIME’s Base64 scheme as follows:

In the above quote the encoded value of Man is TWFu. Encoded in ASCII, the letters «M», «a», and «n» are stored as the bytes 77, 97, 110, which are equivalent to «01001101», «01100001», and «01101110» in base-2. These three bytes are joined together in a 24 bit buffer producing the binary sequence «010011010110000101101110». Packs of 6 bits (6 bits have a maximum of 64 different binary values) are converted into 4 numbers (24 = 4 * 6 bits) which are then converted to their corresponding values in Base64.

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Decode from Base64 format

Decode files from Base64 format

Meet Base64 Decode and Encode, a simple online tool that does exactly what it says: decodes from Base64 encoding as well as encodes into it quickly and easily. Base64 encode your data without hassles or decode it into a human-readable format.

Base64 encoding schemes are commonly used when there is a need to encode binary data, especially when that data needs to be stored and transferred over media that are designed to deal with text. This encoding helps to ensure that the data remains intact without modification during transport. Base64 is used commonly in a number of applications including email via MIME, as well as storing complex data in XML or JSON.

Advanced options

• Character set: In case of textual data, the encoding scheme does not contain the character set, so you have to specify which character set was used during the encoding process. It is usually UTF-8, but can be many others; if you are not sure then play with the available options or try the auto-detect option. This information is used to convert the decoded data to our website’s character set so that all letters and symbols can be displayed properly. Note that this is irrelevant for files since no web-safe conversions need to be applied to them.
• Decode each line separately: The encoded data usually consists of continuous text, so even newline characters are converted into their Base64 encoded forms. Prior to decoding, all non-encoded whitespaces are stripped from the input to safeguard the input’s integrity. This option is useful if you intend to decode multiple independent data entries that are separated by line breaks.
• Live mode: When you turn on this option the entered data is decoded immediately with your browser’s built-in JavaScript functions, without sending any information to our servers. Currently, this mode supports only the UTF-8 character set.

Safe and secure

All communications with our servers come through secure SSL encrypted connections (https). We delete uploaded files from our servers immediately after being processed and the resulting downloadable file is deleted right after the first download attempt or 15 minutes of inactivity (whichever is shorter). We do not keep or inspect the contents of the submitted data or uploaded files in any way. Read our privacy policy below for more details.

Our tool is free to use. From now on, you don’t need to download any software for such simple tasks.

Details of the Base64 encoding

Base64 is a generic term for a number of similar encoding schemes that encode binary data by treating it numerically and translating it into a base-64 representation. The Base64 term originates from a specific MIME-content transfer encoding.

The particular choice of characters to make up the 64 characters required for Base64 varies between implementations. The general rule is to choose a set of 64 characters that is both 1) part of a subset common to most encodings, and 2) also printable. This combination leaves the data unlikely to be modified in transit through systems such as email, which were traditionally not 8-bit clean. For example, MIME’s Base64 implementation uses A-Z, a-z, and 0-9 for the first 62 values, as well as «+» and «/» for the last two. Other variations, usually derived from Base64, share this property but differ in the symbols chosen for the last two values; an example is the URL and filename safe «RFC 4648 / Base64URL» variant, which uses «-» and «_».

Here’s a quote snippet from Thomas Hobbes’s Leviathan:

«Man is distinguished, not only by his reason, but . «

This is represented as an ASCII byte sequence and encoded in MIME’s Base64 scheme as follows:

In the above quote the encoded value of Man is TWFu. Encoded in ASCII, the letters «M», «a», and «n» are stored as the bytes 77, 97, 110, which are equivalent to «01001101», «01100001», and «01101110» in base-2. These three bytes are joined together in a 24 bit buffer producing the binary sequence «010011010110000101101110». Packs of 6 bits (6 bits have a maximum of 64 different binary values) are converted into 4 numbers (24 = 4 * 6 bits) which are then converted to their corresponding values in Base64.

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Base64 Decode Mac Os

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