51 lines
1.9 KiB
Bash
Executable file
51 lines
1.9 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright The Mbed TLS Contributors
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# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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. "${0%/*}/../demo_common.sh"
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msg <<'EOF'
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This script demonstrates the use of the PSA cryptography interface to
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create a master key, derive a key from it and use that derived key to
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wrap some data using an AEAD algorithm.
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EOF
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depends_on MBEDTLS_SHA256_C MBEDTLS_MD_C MBEDTLS_AES_C MBEDTLS_CCM_C MBEDTLS_PSA_CRYPTO_C MBEDTLS_FS_IO
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program="${0%/*}"/key_ladder_demo
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if [ -e master.key ]; then
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echo "# Reusing the existing master.key file."
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else
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files_to_clean="$files_to_clean master.key"
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run "Generate a master key." \
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"$program" generate master=master.key
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fi
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files_to_clean="$files_to_clean input.txt hello_world.wrap"
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echo "Here is some input. See it wrapped." >input.txt
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run "Derive a key and wrap some data with it." \
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"$program" wrap master=master.key label=hello label=world \
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input=input.txt output=hello_world.wrap
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files_to_clean="$files_to_clean hello_world.txt"
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run "Derive the same key again and unwrap the data." \
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"$program" unwrap master=master.key label=hello label=world \
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input=hello_world.wrap output=hello_world.txt
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run "Compare the unwrapped data with the original input." \
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cmp input.txt hello_world.txt
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files_to_clean="$files_to_clean hellow_orld.txt"
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run_bad "Derive a different key and attempt to unwrap the data." \
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"$program" unwrap master=master.key input=hello_world.wrap output=hellow_orld.txt label=hellow label=orld
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files_to_clean="$files_to_clean hello.key"
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run "Save the first step of the key ladder, then load it as a master key and construct the rest of the ladder." \
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"$program" save master=master.key label=hello \
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input=hello_world.wrap output=hello.key
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run "Check that we get the same key by unwrapping data made by the other key." \
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"$program" unwrap master=hello.key label=world \
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input=hello_world.wrap output=hello_world.txt
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cleanup
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