1 files changed, 36 insertions, 0 deletions
diff --git a/inimodify.sh b/inimodify.sh
new file mode 100755
index 0000000..939e47a
--- /dev/null
+++ b/inimodify.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Dynamically modifies openssl config file
+# ./inimodify.sh [header] [variable] [value] < openssl.cnf
+# ./inimodify.sh "usr_cert" "extendedKeyUsage" "clientAuth, serverAuth" < openssl.cnf
+#requires bash 4.0 regexes
+
+set -x
+set -e
+[ -n "$1" ] && HEADER="$1"   || exit 2
+[ -n "$2" ] && VARIABLE="$2" || exit 3
+[ -n "$3" ] && VALUE="$3"    || exit 4
+
+IFS=$'\n'
+HEADER_STANZA=0
+VARIABLE_MODIFIED=0
+while read line; do
+  if [[ "$line" =~ ^\ *\[\ *"$HEADER"\ *\] ]]; then
+    HEADER_STANZA=1
+    echo "$line"
+  elif [ "$HEADER_STANZA" == 1 ] && [[ "$line" =~ ^\ *"$VARIABLE"\ *= ]]; then
+    echo -n "$line"
+    echo ", $VALUE"
+    VARIABLE_MODIFIED=1
+  elif [ "$HEADER_STANZA" == 1 ] && [[ "$line" =~ ^\ *\[\ .+\ \] ]]; then
+    if [ "$VARIABLE_MODIFIED" == 0 ]; then
+      echo "$VARIABLE = $VALUE"
+      echo
+      VARIABLE_MODIFIED=1
+    fi
+    HEADER_STANZA=0
+    echo "$line"
+  else
+    echo "$line"
+  fi
+
+done