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Added support for AES-ECB to the PSA Crypto implementation #3480

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merged 5 commits into from
Sep 14, 2020
Merged

Added support for AES-ECB to the PSA Crypto implementation #3480

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ed3c9ec
Added support for AES-ECB to the PSA Crypto implementation
stevew817 Jul 6, 2020
2a48b53
Added changelog entry for AES-ECB in PSA
stevew817 Jul 6, 2020
a6033e9
Style and language fixes
stevew817 Aug 25, 2020
ffecb7b
Implement support for multipart ECB and add tests
stevew817 Aug 25, 2020
177deba
Fix style and pull out ECB processing in separate function
stevew817 Sep 7, 2020
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84 changes: 79 additions & 5 deletions library/psa_crypto.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3945,9 +3945,9 @@ psa_status_t psa_cipher_update( psa_cipher_operation_t *operation,
size_t output_size,
size_t *output_length )
{
psa_status_t status;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
size_t expected_output_size;
size_t internal_output_length;

if( operation->alg == 0 )
{
Expand Down Expand Up @@ -3975,9 +3975,83 @@ psa_status_t psa_cipher_update( psa_cipher_operation_t *operation,
goto exit;
}

ret = mbedtls_cipher_update( &operation->ctx.cipher, input,
input_length, output, output_length );
status = mbedtls_to_psa_error( ret );
if( operation->alg == PSA_ALG_ECB_NO_PADDING )
{
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/* mbedtls_cipher_update has an API inconsistency: it will only
* process a single block at a time in ECB mode. Abstract away that
* inconsistency here to match the PSA API behaviour. */
*output_length = 0;

if( input_length == 0 )
{
status = PSA_SUCCESS;
goto exit;
}

if( expected_output_size > 0 )
{
size_t ctx_bytes = operation->ctx.cipher.unprocessed_len;
if( ctx_bytes > 0 )
{
/* Fill up to block size and run the block */
size_t bytes_to_copy = operation->block_size - ctx_bytes;
memcpy( &( operation->ctx.cipher.unprocessed_data[ctx_bytes] ),
input, bytes_to_copy );
input_length -= bytes_to_copy;
input += bytes_to_copy;
operation->ctx.cipher.unprocessed_len = 0;

status = mbedtls_to_psa_error(
mbedtls_cipher_update( &operation->ctx.cipher,
operation->ctx.cipher.unprocessed_data,
operation->block_size,
output, &internal_output_length ) );

if( status != PSA_SUCCESS )
goto exit;

output += internal_output_length;
output_size -= internal_output_length;
*output_length += internal_output_length;
}

size_t blocks = input_length / operation->block_size;
for( ; blocks > 0; blocks-- )
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{
/* Run all full blocks we have, one by one */
status = mbedtls_to_psa_error(
mbedtls_cipher_update( &operation->ctx.cipher, input,
operation->block_size,
output, &internal_output_length ) );

if( status != PSA_SUCCESS )
goto exit;

input_length -= operation->block_size;
input += operation->block_size;

output += internal_output_length;
output_size -= internal_output_length;
*output_length += internal_output_length;
}
}

if( input_length > 0 )
{
/* Save unprocessed bytes for later processing */
memcpy( &( operation->ctx.cipher.unprocessed_data[operation->ctx.cipher.unprocessed_len] ),
input, input_length );
operation->ctx.cipher.unprocessed_len += input_length;
}

status = PSA_SUCCESS;
}
else
{
status = mbedtls_to_psa_error(
mbedtls_cipher_update( &operation->ctx.cipher, input,
input_length, output, output_length ) );
}
exit:
if( status != PSA_SUCCESS )
psa_cipher_abort( operation );
Expand Down
64 changes: 60 additions & 4 deletions tests/suites/test_suite_psa_crypto.data
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Original file line number Diff line number Diff line change
Expand Up @@ -1126,10 +1126,18 @@ PSA cipher: bad order function calls
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_bad_order:

PSA symmetric encrypt: AES-ECB, 0 bytes, good
depends_on:MBEDTLS_AES_C
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"":"":PSA_SUCCESS

PSA symmetric encrypt: AES-ECB, 16 bytes, good
depends_on:MBEDTLS_AES_C
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e117393172a":"3ad77bb40d7a3660a89ecaf32466ef97":PSA_SUCCESS

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Please add a few more test cases (for both encrypt and decrypt): 0 bytes, 32 bytes, a non-multiple of 16.

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Please add at least a 1-block 3DES test case.

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3DES isn't in scope for this PR?

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This PR makes Mbed TLS recognize PSA_ALG_ECB_NO_PADDING, so it should test the algorithm with at least a selection of block ciphers. 3DES and other block ciphers should either work correctly or return NOT_SUPPORTED. I requested a test for 3DES and not for e.g. CAMELLIA because CAMELLIA is very likely to work if AES does, whereas DES and 3DES could be incorrect due to a misuse of a hard-coded 16 instead of the block size somewhere.

PSA symmetric encrypt: AES-ECB, 32 bytes, good
depends_on:MBEDTLS_AES_C
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e117393172a3ad77bb40d7a3660a89ecaf32466ef97":"3ad77bb40d7a3660a89ecaf32466ef972249a2638c6f1c755a84f9681a9f08c1":PSA_SUCCESS

PSA symmetric encrypt: AES-CBC-nopad, 16 bytes, good
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a":"a076ec9dfbe47d52afc357336f20743b":PSA_SUCCESS
Expand All @@ -1142,6 +1150,10 @@ PSA symmetric encrypt: AES-CBC-PKCS#7, 15 bytes, good
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_CBC_PKCS7:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e11739317":"6279b49d7f7a8dd87b685175d4276e24":PSA_SUCCESS

PSA symmetric encrypt: AES-ECB, input too short (15 bytes)
depends_on:MBEDTLS_AES_C
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e11739317":"3ad77bb40d7a3660a89ecaf32466ef":PSA_ERROR_INVALID_ARGUMENT
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PSA symmetric encrypt: AES-CBC-nopad, input too short
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee223":"6bc1bee223":PSA_ERROR_INVALID_ARGUMENT
Expand All @@ -1166,10 +1178,26 @@ PSA symmetric encrypt: 3-key 3DES-CBC-nopad, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce31323437383b3d3e":"2a2a2a2a2a2a2a2a":"eda4011239bc3ac9":"817ca7d69b80d86a":PSA_SUCCESS

PSA symmetric encrypt: 2-key 3DES-ECB, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce":"":"c78e2b38139610e3":"5d0652429c5b0ac7":PSA_SUCCESS

PSA symmetric encrypt: 3-key 3DES-ECB, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce31323437383b3d3e":"":"c78e2b38139610e3":"817ca7d69b80d86a":PSA_SUCCESS

PSA symmetric decrypt: AES-ECB, 0 bytes, good
depends_on:MBEDTLS_AES_C
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"":"":PSA_SUCCESS

PSA symmetric decrypt: AES-ECB, 16 bytes, good
depends_on:MBEDTLS_AES_C
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"396ee84fb75fdbb5c2b13c7fe5a654aa":"63cecc46a382414d5fa7d2b79387437f":PSA_SUCCESS

PSA symmetric decrypt: AES-ECB, 32 bytes, good
depends_on:MBEDTLS_AES_C
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"3ad77bb40d7a3660a89ecaf32466ef972249a2638c6f1c755a84f9681a9f08c1":"6bc1bee22e409f96e93d7e117393172a3ad77bb40d7a3660a89ecaf32466ef97":PSA_SUCCESS

PSA symmetric decrypt: AES-CBC-nopad, 16 bytes, good
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"396ee84fb75fdbb5c2b13c7fe5a654aa":"49e4e66c89a86b67758df89db9ad6955":PSA_SUCCESS
Expand All @@ -1190,6 +1218,10 @@ PSA symmetric decrypt: AES-CTR, 16 bytes, good
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"396ee84fb75fdbb5c2b13c7fe5a654aa":"dd3b5e5319b7591daab1e1a92687feb2":PSA_SUCCESS

PSA symmetric decrypt: AES-ECB, input too short (15 bytes)
depends_on:MBEDTLS_AES_C
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"396ee84fb75fdbb5c2b13c7fe5a654":"63cecc46a382414d5fa7d2b7938743":PSA_ERROR_INVALID_ARGUMENT

PSA symmetric decrypt: AES-CBC-nopad, input too short (5 bytes)
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee223":"6bc1bee223":PSA_ERROR_BAD_STATE
Expand All @@ -1206,6 +1238,14 @@ PSA symmetric decrypt: 3-key 3DES-CBC-nopad, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce31323437383b3d3e":"2a2a2a2a2a2a2a2a":"817ca7d69b80d86a":"eda4011239bc3ac9":PSA_SUCCESS

PSA symmetric decrypt: 2-key 3DES-ECB, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce":"":"5d0652429c5b0ac7":"c78e2b38139610e3":PSA_SUCCESS

PSA symmetric decrypt: 3-key 3DES-ECB, 8 bytes, good
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_DES:"01020407080b0d0ec1c2c4c7c8cbcdce31323437383b3d3e":"":"817ca7d69b80d86a":"c78e2b38139610e3":PSA_SUCCESS

PSA symmetric encrypt/decrypt: AES-ECB, 16 bytes, good
depends_on:MBEDTLS_AES_C
cipher_verify_output:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"6bc1bee22e409f96e93d7e117393172a"
Expand All @@ -1230,6 +1270,14 @@ PSA symmetric encryption multipart: AES-ECB, 16+16 bytes
depends_on:MBEDTLS_AES_C
cipher_encrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":16:16:16:"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c"

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Please add a test case where the input isn't split on a block boundary (e.g. 1+15). And please add a bad test case where the total input isn't a whole number of blocks. All for both encrypt and decrypt.

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There weren't any negative test cases being done with _multipart tests. Is it really up to me to introduce that here?

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A prior test gap is not a justification for expanding the test gap in general. But ok, let's defer negative testing for multipart operations since it's a preexisting lack of test code. Do please add test with input that isn't split on a block boundary, which was already done for CBC.

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Sure (push incoming for the non-block-multiple operations).

PSA symmetric encryption multipart: AES-ECB, 13+19 bytes
depends_on:MBEDTLS_AES_C
cipher_encrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":13:0:32:"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c"

PSA symmetric encryption multipart: AES-ECB, 24+12 bytes
depends_on:MBEDTLS_AES_C
cipher_encrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":24:16:16:"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c"

PSA symmetric encryption multipart: AES-CBC-nopad, 7+9 bytes
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_encrypt_multipart:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a":7:0:16:"a076ec9dfbe47d52afc357336f20743b"
Expand Down Expand Up @@ -1298,6 +1346,14 @@ PSA symmetric decryption multipart: AES-ECB, 16+16 bytes
depends_on:MBEDTLS_AES_C
cipher_decrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c":16:16:16:"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef"

PSA symmetric decryption multipart: AES-ECB, 11+21 bytes
depends_on:MBEDTLS_AES_C
cipher_decrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c":11:0:32:"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef"

PSA symmetric decryption multipart: AES-ECB, 28+4 bytes
depends_on:MBEDTLS_AES_C
cipher_decrypt_multipart:PSA_ALG_ECB_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"":"3ad77bb40d7a3660a89ecaf32466ef9755ed5e9e066820fa52c729886d18854c":28:16:16:"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef"

PSA symmetric decryption multipart: AES-CBC-nopad, 7+9 bytes
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CBC
cipher_decrypt_multipart:PSA_ALG_CBC_NO_PADDING:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"a076ec9dfbe47d52afc357336f20743b":7:0:16:"6bc1bee22e409f96e93d7e117393172a"
Expand Down Expand Up @@ -1326,19 +1382,19 @@ PSA symmetric encryption multipart: AES-CTR, 11+5 bytes [#2]
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt_multipart:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a":11:11:5:"8f9408fe80a81d3e813da3c7b0b2bd32"

PSA symmetric encryption multipart: AES-CTR, 16+16 bytes [#2]
PSA symmetric decryption multipart: AES-CTR, 16+16 bytes [#2]
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depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt_multipart:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":16:16:16:"8f9408fe80a81d3e813da3c7b0b2bd321c965bb1de7baf71025f6ef6393ca587"

PSA symmetric encryption multipart: AES-CTR, 12+20 bytes [#2]
PSA symmetric decryption multipart: AES-CTR, 12+20 bytes [#2]
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt_multipart:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":12:12:20:"8f9408fe80a81d3e813da3c7b0b2bd321c965bb1de7baf71025f6ef6393ca587"

PSA symmetric encryption multipart: AES-CTR, 20+12 bytes [#2]
PSA symmetric decryption multipart: AES-CTR, 20+12 bytes [#2]
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt_multipart:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a5434f378a597bcef1389318c7fc865ef":20:20:12:"8f9408fe80a81d3e813da3c7b0b2bd321c965bb1de7baf71025f6ef6393ca587"

PSA symmetric encryption multipart: AES-CTR, 12+10 bytes [#2]
PSA symmetric decryption multipart: AES-CTR, 12+10 bytes [#2]
depends_on:MBEDTLS_AES_C:MBEDTLS_CIPHER_MODE_CTR
cipher_decrypt_multipart:PSA_ALG_CTR:PSA_KEY_TYPE_AES:"2b7e151628aed2a6abf7158809cf4f3c":"2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a":"6bc1bee22e409f96e93d7e117393172a5434f378a597":12:12:10:"8f9408fe80a81d3e813da3c7b0b2bd321c965bb1de7b"

Expand Down