Is there any API to convert ECDSA signature to ASN.1 encoding? #63
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I am using Optiga Trust M for IoT application and really new to this ASN.1 encoding. Is there any API which can be used to convert obtained r,s component from the chip to ASN.1 encoding? I could not find such API in TRM and Wiki. |
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Hello @markandpathak |
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@ayushev Thank you very much for the clarification. It will be nice if this information is included in the signature description to provide more clear idea to beginners about signature received from IC. |
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Hello @markandpathak
if you are refereing to the signature you get from the chip, then it is already in the ASN.1 format, some platform though require addtional tags befoer that value:
1 byte - 0x03
2 byte - size of the signature, for the NISTP256 it will be 0x42
3 byte - 0x00