esp_secure_boot_verify_ecdsa_signature_block() function

Verify the ECDSA secure boot signature block for Secure Boot V1. Calculates Deterministic ECDSA w/ SHA256 based on the SHA256 hash of the image. ECDSA signature verification must be enabled in project configuration to use this function. Similar to esp_secure_boot_verify_signature(), but can be used when the digest is precalculated.

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Declaration

from esp_secure_boot.h:250

esp_err_t esp_secure_boot_verify_ecdsa_signature_block(const esp_secure_boot_sig_block_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);

Arguments

Argument

Description

sig_block

Pointer to ECDSA signature block data

image_digest

Pointer to 32 byte buffer holding SHA-256 hash.

verified_digest

Pointer to 32 byte buffer that will receive verified digest if verification completes. (Used during bootloader implementation only, result is invalid otherwise.)

References

Code

Location

esp_err_t esp_secure_boot_verify_ecdsa_signature_block(const esp_secure_boot_sig_block_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);

esp_secure_boot.h:250

esp_secure_boot_verify_ecdsa_signature_block() function

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esp_secure_boot_verify_ecdsa_signature_block() function

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