CL-USER> (alexandria:write-string-into-file "foo bar baz
" #p"/tmp/shatest")
"foo bar baz
"

CL-USER> (ironclad:digest-file 'ironclad:sha256 #p"/tmp/shatest")
#(246 242 74 17 215 203 187 198 217 68 10 202 46 186 15 100 152 117 92 169 10
  222 161 76 94 35 59 244 192 75 217 40)

CL-USER> (ironclad:digest-sequence 'ironclad:sha256 (babel:string-to-octets "foo bar baz
"))
#(246 242 74 17 215 203 187 198 217 68 10 202 46 186 15 100 152 117 92 169 10
  222 161 76 94 35 59 244 192 75 217 40)