src/HOL/SPARK/Examples/RIPEMD-160/K_L.thy
author wenzelm
Sun, 06 Jan 2019 15:04:34 +0100
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(*  Title:      HOL/SPARK/Examples/RIPEMD-160/K_L.thy
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    Author:     Fabian Immler, TU Muenchen
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Verification of the RIPEMD-160 hash function
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*)
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theory K_L
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imports RMD_Specification
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begin
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spark_open \<open>rmd/k_l\<close>
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spark_vc function_k_l_6
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  using assms by (simp add: K_def)
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spark_vc function_k_l_7
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proof -
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  from H1 have "16 <= nat j" by simp
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  moreover from H2 have "nat j <= 31" by simp
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  ultimately show ?thesis by (simp add: K_def)
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qed
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spark_vc function_k_l_8
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proof -
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  from H1 have "32 <= nat j" by simp
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  moreover from H2 have "nat j <= 47" by simp
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  ultimately show ?thesis by (simp add: K_def)
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qed
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spark_vc function_k_l_9
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proof -
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  from H1 have "48 <= nat j" by simp
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  moreover from H2 have "nat j <= 63" by simp
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  ultimately show ?thesis by (simp add: K_def)
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qed
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spark_vc function_k_l_10
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proof -
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  from H6 have "64 <= nat j" by simp
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  moreover from H2 have "nat j <= 79" by simp
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  ultimately show ?thesis by (simp add: K_def)
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qed
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spark_end
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end