diff --git a/content/proyectos/firmador/_index.md b/content/proyectos/firmador/_index.md
new file mode 100644
index 0000000..169cebb
--- /dev/null
+++ b/content/proyectos/firmador/_index.md
@@ -0,0 +1,4 @@
+---
+title: "Firmador libre"
+date: 2024-05-12
+---
diff --git a/content/proyectos/firmador/update-lib/_index.md b/content/proyectos/firmador/update-lib/_index.md
new file mode 100644
index 0000000..2475faf
--- /dev/null
+++ b/content/proyectos/firmador/update-lib/_index.md
@@ -0,0 +1,129 @@
+---
+title: "update-lib.sh"
+date: 2024-05-12
+---
+
+# Script para actualizar librerías automáticamente
+
+- 0 notificaciones de `shellcheck` en modo `POSIX sh`
+- Solamente comandos estrictamente necesarios y utilidades/funciones de `POSIX sh (printf, while, case)`
+
+## 1. Revisar comandos externos a shell, definir funciones para loggear
+
+```sh
+#!/bin/sh
+# External dependencies:
+deps="curl tar cd mkdir cmake make"
+script_name="$0"
+
+success() {
+    printf '    %s - \033[32mSuccess:\033[0m \033[2m%s\033[0m\n' "$script_name" "$1"
+}
+
+warn() {
+    printf '    %s - \033[33mWarn:\033[0m \033[2m%s\033[0m\n' "$script_name" "$1"
+}
+
+consolelog() {
+    printf '    %s - \033[2mLog: %s\033[0m\n' "$script_name" "$1"
+}
+
+error() {
+    printf '    %s - \033[31mError: %s\033[0m\n' "$script_name" "$1"
+}
+
+missing_deps="$(for dep in $deps ; do
+    ! command -v "$dep" 1>/dev/null 2>&1 && printf '%s ' "$dep"
+done)"
+
+[ -n "$missing_deps" ] && error "Missing dependencies for $script_name: $missing_deps" && exit 1
+
+...
+```
+
+## 2. Función para comprobar la última versión de wxWidgets
+
+```sh
+get_latest_wx() {
+    url="https://api.github.com/repos/wxWidgets/wxWidgets/releases/latest"
+
+    current_wx="$(for wx in lib/wx/wxWidgets-* ; do printf '%s' "$wx" ; done)"
+    current_wx="${current_wx##*-}"
+    current_wx="${current_wx%.tar.bz2}"
+
+    latest_wx_url="$(curl -s "$url" | while IFS= read -r line ; do
+        case "$line" in *browser_download_url*)
+            url="${line%\"*}" ; url="${url##*\"}" ; file="${url##*/}"
+            [ "${file##*.}" = "bz2" ] && [ "${file%-*}" = "wxWidgets" ] &&
+                printf '%s\n' "$url" && break ;;
+        esac
+    done)"
+    
+    mkdir -p lib/wx
+    file="${latest_wx_url##*/}"
+    latest_wx_dir="lib/wx/${file%%.tar.bz2}"
+    latest_wx="${latest_wx_dir##*-}"
+
+    # Nor file nor new version can be determined
+    [ -z "$file" ] || [ -z "$latest_wx" ] && return 1
+    
+    # wx is up to date, 0 if success
+    [ "$latest_wx" = "$current_wx" ] &&
+        success "wxWidgets-$current_wx is the latest version" &&
+        return 0
+
+    ...
+```
+
+## ... o descargarla de lo contrario
+
+```sh
+    # Download wx if not present or outdated, 0 if success 1 if fail
+    warn "wxWidgets-$current_wx is behind wxWidgets-$latest_wx, downloading..."
+    curl -sLO "$latest_wx_url" &&
+    curl -sL "$latest_wx_url" -o "lib/wx/$file" &&
+        consolelog "Extracting $file..." && (cd lib/wx && tar xf "$file") &&
+        consolelog "Deleting archive $file..." && rm -f "lib/wx/$file" &&
+	return 0 || return 1
+}
+
+...
+```
+
+## 3. Función para construir wx-config
+
+```sh
+build_wx() {
+    mkdir -p "$latest_wx_dir/autobuild"
+    (cd "$latest_wx_dir/autobuild" && cmake .. && make) 1>/dev/null || return 1
+}
+
+...
+```
+
+## 4. Ejecución
+- Buscar última versión de librerías (únicamente wxWidgets por ahora)
+- Compilarlas si es necesario
+- Loggear y retornar códigos correctos
+
+```sh
+! get_latest_wx && error "Checking, downloading, or extracting failed." && exit 1
+
+if [ "$latest_wx" != "$current_wx" ] ; then
+    consolelog "Building wxWidgets..."
+    ! build_wx && error "Building wxWidgets failed" && exit 1
+    success "Built wxWidgets"
+else
+    binary="$(find ./ -name 'wx-config')"
+    [ -n "$binary" ] && success "Found $binary, skipping building wxWidgets"
+    if [ -z "$binary" ] ; then
+        consolelog "Building wxWidgets..."
+        ! build_wx && error "Building wxWidgets failed" && exit 1
+        binary="$(find ./ -name 'wx-config')"
+        [ -n "$binary" ] && success "Built wxWidgets"
+        [ -z "$binary" ] && error "Can't build wxWidgets" && exit 1
+    fi
+fi
+```
+
+Link del script en texto plano: [update-lib.sh](update-lib.sh.txt)
diff --git a/content/proyectos/firmador/update-lib/update-lib.sh.txt b/content/proyectos/firmador/update-lib/update-lib.sh.txt
new file mode 100644
index 0000000..4f5dc65
--- /dev/null
+++ b/content/proyectos/firmador/update-lib/update-lib.sh.txt
@@ -0,0 +1,85 @@
+#!/bin/sh
+# External dependencies:
+deps="curl tar cd mkdir cmake make"
+script_name="$0"
+
+success() {
+    printf '    %s - \033[32mSuccess:\033[0m \033[2m%s\033[0m\n' "$script_name" "$1"
+}
+
+warn() {
+    printf '    %s - \033[33mWarn:\033[0m \033[2m%s\033[0m\n' "$script_name" "$1"
+}
+
+consolelog() {
+    printf '    %s - \033[2mLog: %s\033[0m\n' "$script_name" "$1"
+}
+
+error() {
+    printf '    %s - \033[31mError: %s\033[0m\n' "$script_name" "$1"
+}
+
+missing_deps="$(for dep in $deps ; do
+    ! command -v "$dep" 1>/dev/null 2>&1 && printf '%s ' "$dep"
+done)"
+
+[ -n "$missing_deps" ] && error "Missing dependencies for $script_name: $missing_deps" && exit 1
+
+get_latest_wx() {
+    url="https://api.github.com/repos/wxWidgets/wxWidgets/releases/latest"
+
+    current_wx="$(for wx in lib/wx/wxWidgets-* ; do printf '%s' "$wx" ; done)"
+    current_wx="${current_wx##*-}"
+    current_wx="${current_wx%.tar.bz2}"
+
+    latest_wx_url="$(curl -s "$url" | while IFS= read -r line ; do
+        case "$line" in *browser_download_url*)
+            url="${line%\"*}" ; url="${url##*\"}" ; file="${url##*/}"
+            [ "${file##*.}" = "bz2" ] && [ "${file%-*}" = "wxWidgets" ] &&
+                printf '%s\n' "$url" && break ;;
+        esac
+    done)"
+    
+    mkdir -p lib/wx
+    file="${latest_wx_url##*/}"
+    latest_wx_dir="lib/wx/${file%%.tar.bz2}"
+    latest_wx="${latest_wx_dir##*-}"
+
+    # Nor file nor new version can be determined
+    [ -z "$file" ] || [ -z "$latest_wx" ] && return 1
+    
+    # wx is up to date, 0 if success
+    [ "$latest_wx" = "$current_wx" ] &&
+        success "wxWidgets-$current_wx is the latest version" &&
+        return 0
+
+    # Download wx if not present or outdated, 0 if success 1 if fail
+    warn "wxWidgets-$current_wx is behind wxWidgets-$latest_wx, downloading..."
+    curl -sL "$latest_wx_url" -o "lib/wx/$file" &&
+        consolelog "Extracting $file..." && (cd lib/wx && tar xf "$file") &&
+        consolelog "Deleting archive $file..." && rm -f "lib/wx/$file" &&
+	return 0 || return 1
+}
+
+build_wx() {
+    mkdir -p "$latest_wx_dir/autobuild"
+    (cd "$latest_wx_dir/autobuild" && cmake .. && make) 1>/dev/null || return 1
+}
+
+! get_latest_wx && error "Checking, downloading, or extracting failed." && exit 1
+
+if [ "$latest_wx" != "$current_wx" ] ; then
+    consolelog "Building wxWidgets..."
+    ! build_wx && error "Building wxWidgets failed" && exit 1
+    success "Built wxWidgets"
+else
+    binary="$(find ./ -name 'wx-config')"
+    [ -n "$binary" ] && success "Found $binary, skipping building wxWidgets"
+    if [ -z "$binary" ] ; then
+        consolelog "Building wxWidgets..."
+        ! build_wx && error "Building wxWidgets failed" && exit 1
+        binary="$(find ./ -name 'wx-config')"
+        [ -n "$binary" ] && success "Built wxWidgets"
+        [ -z "$binary" ] && error "Can't build wxWidgets" && exit 1
+    fi
+fi