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< h3 > Webmasters< / h3 >
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< li > < a class = "docs-link" href = "/docs/webmasters/installing-captcha/" > Installing mCaptcha on your website< / a > < / li >
< li > < a class = "docs-link" href = "/docs/webmasters/configuring-difficulty-factor/" > Configuring Difficulty Factor< / a > < / li >
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< li > < a class = "docs-link active" href = "/docs/user-manual/cli/" > CLI tool< / a > < / li >
< li > < a class = "docs-link" href = "/docs/user-manual/how-to-mcaptcha-without-js/" > Use mCaptcha without JavaScript< / a > < / li >
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< li > < a class = "docs-link" href = "/docs/self-hosting/getting-started/" > Getting started< / a > < / li >
< li > < a class = "docs-link" href = "/docs/self-hosting/bare-metal/" > Deploy bare metal< / a > < / li >
< li > < a class = "docs-link" href = "/docs/self-hosting/ansible/" > Using Ansible< / a > < / li >
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< li > < a class = "docs-link" href = "/docs/api/browser/" > Browser libraries< / a > < / li >
< li > < a class = "docs-link" href = "/docs/api/mcaptcha-system/" > mCaptcha System Library< / a > < / li >
< li > < a class = "docs-link" href = "/docs/api/pow-sha256/" > pow_sha256< / a > < / li >
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< li > < a href = "#install" > Install< / a >
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< li > < a href = "#cratesio" > crates.io< / a > < / li >
< li > < a href = "#pre-compiled-binaries" > Pre-compiled binaries< / a > < / li >
< li > < a href = "#build-from-source" > Build from source< / a > < / li >
< / ul >
< / li >
< li > < a href = "#pass-mcaptcha-challenge" > Pass mCaptcha challenge< / a >
< ul >
< li > < a href = "#from-protected-page-url" > From protected page URL< / a > < / li >
< li > < a href = "#widget-url" > Widget URL< / a > < / li >
< li > < a href = "#developer-mode-offline" > [Developer mode] Offline< / a > < / li >
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< h1 > CLI tool< / h1 >
< p class = "lead" > < / p >
< p > A CLI tool exists to compute mCaptcha challenges. It can be installed
from multiple sources:< / p >
< h2 id = "install" > Install< a href = "#install" class = "anchor" aria-hidden = "true" > #< / a > < / h2 >
< h3 id = "cratesio" > crates.io< a href = "#cratesio" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< p > The CLI tool is available on, < a href = "https://crates.io" > crates.io< / a > , the Rust
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language’ s package registry. Rust language toolchain is required to
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install from crates.io, please see < a href = "https://rustup.rs" > rustup.rs< / a > for
Instructions to install it.< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > cargo install mcaptcha-cli
< / span > < / span > < / code > < / pre > < / div > < h3 id = "pre-compiled-binaries" > Pre-compiled binaries< a href = "#pre-compiled-binaries" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< p > Nightly builds and stable releases are regularly published to
< a href = "https://dl.mcaptcha.org/mcaptcha/cli" > dl.mcaptcha.org< / a > for a variety of
CPU architectures and operating systems.< / p >
< ol >
< li > Download binary, checksum and GPG signature files< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > wget https://dl.mcaptcha.org/mcaptcha/cli/< span style = "color:#ff79c6" > {< / span > VERSION< span style = "color:#ff79c6" > }< / span > /< span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > wget https://dl.mcaptcha.org/mcaptcha/cli/< span style = "color:#ff79c6" > {< / span > VERSION< span style = "color:#ff79c6" > }< / span > /< span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz.asc
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 3< / span > < span > wget https://dl.mcaptcha.org/mcaptcha/cli/< span style = "color:#ff79c6" > {< / span > VERSION< span style = "color:#ff79c6" > }< / span > /< span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz.sha256
< / span > < / span > < / code > < / pre > < / div > < ol start = "2" >
< li > Verify checksum< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > sha256sum -c < span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz.sha256
< / span > < / span > < / code > < / pre > < / div > < ol start = "3" >
< li > Download mCaptcha’ s GPG release keys and verify GPG signature< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > gpg --keyserver keyserver.ubuntu.com --recv 73DAC973A9ADBB9ADCB5CDC4595A08135BA9FF73
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > gpg --verify < span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz.asc
< / span > < / span > < / code > < / pre > < / div > < ol start = "4" >
< li > Install Binary< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > tar -xvzf < span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > .tar.gz < span style = "color:#ff79c6" > & & < / span > sudo cp < span style = "color:#ff79c6" > {< / span > FILENAME< span style = "color:#ff79c6" > }< / span > /mcaptcha-cli /usr/local/bin
< / span > < / span > < / code > < / pre > < / div > < h3 id = "build-from-source" > Build from source< a href = "#build-from-source" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< ol >
< li > Install Rust tool chain
Please see < a href = "https://rustup.rs" > here< / a > for instructions.< / li >
< li > Download source code< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > git clone https://git.batsense.net/mCaptcha/cli
< / span > < / span > < / code > < / pre > < / div > < ol start = "3" >
< li > Compile and install< / li >
< / ol >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > cargo build --release < span style = "color:#ff79c6" > & & < / span > sudp cp ./target/release/mcaptcha-cli
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > /usr/local/bin
< / span > < / span > < / code > < / pre > < / div > < h2 id = "pass-mcaptcha-challenge" > Pass mCaptcha challenge< a href = "#pass-mcaptcha-challenge" class = "anchor" aria-hidden = "true" > #< / a > < / h2 >
< p > The CLI tool requires details about the challenge to work on it. The
tool can be used in three different modes compute challenge:< / p >
< ol >
< li > Protected Page: Compute mCaptcha challenge for the CAPTCHA at a
protected page< / li >
< li > Widget URL: Compute PoW for captcha at widget URL< / li >
< li > (Developer mode) Offline: Computes PoW over given CAPTCHA parameters< / li >
< / ol >
< h3 id = "from-protected-page-url" > From protected page URL< a href = "#from-protected-page-url" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< p > The most convenient mode: copy the URL of the webpage which has the
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mCaptcha widget (example: showcase.mcaptcha.org) and run the CLI tool
with it to get an authorization code:
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Compute challenge using the URL< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > 03:39 atm@lab cli ±|feat-parse-webpage ✗|→ mcaptcha-cli protected-page https://showcase.mcaptcha.org/
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > Authorization token: eRAZJiMrW58uDYA1s64Tmwq1u30HutuF
< / span > < / span > < / code > < / pre > < / div > < h3 id = "widget-url" > Widget URL< a href = "#widget-url" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< p > If you have the widget URL (will be in format https://mcaptcha.example.org/widget?sitekey=randomstring), it can be used to solve challenge as well:< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > Compute PoW by fetching parameters from CAPTCHA URL
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 3< / span > < span > Usage: mcaptcha-cli online --url < URL>
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 4< / span > < span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 5< / span > < span > Options:
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 6< / span > < span > -u, --url < URL> URL of the CAPTCHA. Example: https://example.org/widget?sitekey< span style = "color:#ff79c6" > =< / span > foo
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 7< / span > < span > -h, --help Print < span style = "color:#8be9fd;font-style:italic" > help< / span >
< / span > < / span > < / code > < / pre > < / div > < p > Example usage:< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > 13:32 atm@lab cli ±|online ✗|→ mcaptcha-cli online -u https://demo.mcaptcha.org/widget?sitekey< span style = "color:#ff79c6" > =< / span > pHy0AktWyOKuxZDzFfoaewncWecCHo23
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > Authorization token: 3xleN26OctBuVu3X4t6CYyUjErhaxQvz
< / span > < / span > < / code > < / pre > < / div > < h3 id = "developer-mode-offline" > [Developer mode] Offline< a href = "#developer-mode-offline" class = "anchor" aria-hidden = "true" > #< / a > < / h3 >
< p > Useful while debugging mCaptcha configurations, works on raw challenge
parameters.< / p >
< p > Help menu:< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > Compute PoW with offline parameters
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 3< / span > < span > Usage: mcaptcha-cli offline --salt < SALT> --phrase < PHRASE> --difficulty-factor < DIFFICULTY_FACTOR>
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 4< / span > < span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 5< / span > < span > Options:
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 6< / span > < span > -s, --salt < SALT> Salt with which PoW should be computed
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 7< / span > < span > -p, --phrase < PHRASE> Phrase over which PoW should be computed
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 8< / span > < span > -d, --difficulty-factor < DIFFICULTY_FACTOR> Difficulty Factor
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 9< / span > < span > -h, --help Print < span style = "color:#8be9fd;font-style:italic" > help< / span >
< / span > < / span > < / code > < / pre > < / div > < p > Example usage:< / p >
< div class = "highlight" > < pre tabindex = "0" style = "color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;" > < code class = "language-bash" data-lang = "bash" > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 1< / span > < span > 13:28 atm@lab cli ±|online|→ mcaptcha-cli offline -s < span style = "color:#ff79c6" > $(< / span > rand 32< span style = "color:#ff79c6" > )< / span > -p < span style = "color:#ff79c6" > $(< / span > rand 32< span style = "color:#ff79c6" > )< / span > -d < span style = "color:#bd93f9" > 50000< / span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 2< / span > < span > difficulty: < span style = "color:#bd93f9" > 50000< / span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 3< / span > < span > nonce: < span style = "color:#bd93f9" > 90507< / span >
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 4< / span > < span > original phrase: f351f333d44b2c6b5bf7f033b065bbb8fb5e9dd153bd402e43ed04425f5a3859
< / span > < / span > < span style = "display:flex;" > < span style = "white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f" > 5< / span > < span > result: < span style = "color:#bd93f9" > 340276562956196291522979356090220150471< / span >
< / span > < / span > < / code > < / pre > < / div > < p > Where rand is < a href = "https://github.com/realaravinth/dotfiles/blob/6fc6c87cc912e17488a35c0d3327ecf393221270/scripts/rand#L20" > this< / a > script.< / p >
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