added cert-info.sh

README.md

@@ -3,6 +3,7 @@
 Small tools needed to solve immediate tasks independently or as part of a project
 
 * [`build-python`.sh](https://git.hmp.today/pavel.muhortov/utils#build-python-sh)
+* [`cert-info`.sh](https://git.hmp.today/pavel.muhortov/utils#cert-info-sh)
 * [`sendmail`.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
 * [`simplewc`.py](https://git.hmp.today/pavel.muhortov/utils#simplewc-py)
 
@@ -39,6 +40,36 @@ sudo su - -c "bash <(curl -s https://git.hmp.today/pavel.muhortov/utils/raw/bran
 
 ____
 
+## `cert-info`.sh
+
+**Description:**  
+> Get certificate info.  
+
+**Dependencies:**  
+>
+> * [bash](https://www.gnu.org/software/bash/) (tested versions: 4.2.46 on [CentOS 7](https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7.2009))
+> * [openssl](https://www.openssl.org/) (tested version 1.0.2k on [CentOS 7](https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7.2009))
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**[hostname:port \| /path/to/cert]**|certificate location||
+|     2     |**[-e]**|print of the expired date timestamp||
+|     2     |**[-f]**|print of the fingerprint||
+|     2     |**[-r]**|print of the remaining days||
+
+Example usage in terminal with make the script executable:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/cert-info.sh -O /usr/local/bin/cert-info.sh
+sudo chmod +x /usr/local/bin/cert-info.sh
+# check cert
+cert-info.sh www.hmp.today
+cert-info.sh /etc/ssl/certs/ca-certificates.crt
+```
+
+____
+
 ## `sendmail`.py
 
 **Description:**  

cert-info.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+
+# DESCRIPTION:
+#   get certificate info
+#
+# DEPENDENCIES:
+#   - openssl
+#
+# PARAMETERS:
+#   1: "hostname:port | /path/to/cert" - certificate location
+#   -e - print of the expired date timestamp
+#   -f - print of the fingerprint
+#   -r - print of the remaining days
+#
+# FUNCTIONS:
+#
+#
+# VARIABLES:
+#
+
+if ! command -v openssl &> /dev/null; then
+  printf "%s\n" "Not found dependencies"
+
+  exit 1
+fi
+
+datetime=$(date +%s)
+certdest=$1
+
+#
+# MAIN:
+#
+
+if [ -n "${certdest}" ]; then
+  certpath="$(printf "%s" "${certdest}" | cut -d':' -f1)"
+
+  if [ -f "${certpath}" ]; then
+    certdata=$(cat "${certpath}")
+
+  else
+    certport="$(printf "%s" "${certdest}" | cut -d':' -f2 -s)"
+    if [ -z "${certport}" ]; then
+        certport=443
+    fi
+    certdata=$( \
+      openssl s_client "${certpath}:${certport}" < /dev/null 2>/dev/null \
+      )
+
+  fi
+
+  if [ -n "${certdata}" ]; then
+    expired=$(date -d \
+      "$(printf "%s" "${certdata}" | \
+        openssl x509 -noout -enddate | \
+        cut -d'=' -f2- \
+        )" \
+      +%s
+      )
+    subject=$(printf "%s" "${certdata}" | \
+      openssl x509 -noout -subject | \
+      cut -d'=' -f3- | cut -d' ' -f2- \
+      )
+    release=$(printf "%s" "${certdata}" | \
+      openssl x509 -noout -startdate | \
+      cut -d'=' -f2- \
+      )
+    fingerp=$(printf "%s" "${certdata}" | \
+      openssl x509 -noout -fingerprint | \
+      cut -d'=' -f2- \
+      )
+    remains=0; remains=$(( expired-datetime )); remains=$(( remains/60/60/24 ))
+
+    if [ -z "${2}" ]; then
+      printf '%s\n' "certpath: ${certpath}"
+      printf '%s\n' "certport: ${certport}"
+      printf '%s\n' "fingerprint: ${fingerp}"
+      printf '%s\n' "subject name: ${subject}"
+      printf '%s\n' "release date: ${release}"
+      printf '%s\n' "expired date: ${expired}"
+      printf '%s\n' "remains days: ${remains}"
+    elif [ "${2}" == "-e" ];then
+      printf '%s\n' "${expired}"
+    elif [ "${2}" == "-f" ];then
+      printf '%s\n' "${fingerp}"
+    elif [ "${2}" == "-r" ];then
+      printf '%s\n' "${remains}"
+    else
+      printf '%s\n' "certdata: ${certdata}"
+    fi
+
+  else
+    printf "%s\n" "Certificate was not loaded"
+
+    exit 1
+  fi
+
+else
+  printf "%s\n" "Usage example: ${0} 'name.domain.zone'"
+  printf "%s\n" "Usage example: ${0} 'name.domain.zone:port' -r"
+  printf "%s\n" "Usage example: ${0} '/path/to/cert' -f"
+
+  exit 1
+fi
+
+exit 0