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Fix bug whereby 0 was written as 0200 rather than 020100

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0200 is not just non-DER, it's completely invalid, since there has to be a
sign bit.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2022-06-10 20:13:33 +02:00
parent 62f217b180
commit bb34feea0d
3 changed files with 12 additions and 2 deletions
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7
tests/suites/test_suite_asn1write.data
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@@ -91,8 +91,11 @@ mbedtls_asn1_write_enum:0x12345678:"0A0412345678"
ASN.1 Write enum 2147483647
mbedtls_asn1_write_enum:0x7fffffff:"0A047fffffff"
#ASN.1 Write mpi 0
#mbedtls_asn1_write_mpi:"00":"020100"
ASN.1 Write mpi 0 (null)
mbedtls_asn1_write_mpi:"":"020100"
ASN.1 Write mpi 0 (1 limb)
mbedtls_asn1_write_mpi:"00":"020100"
ASN.1 Write mpi 1
mbedtls_asn1_write_mpi:"01":"020101"