wc_SignatureVerifyHash isn't working with this hashed message key sig, what am I missing? #5981
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We have a signature verify example that is very similar to what you are testing: You should uncomment this line in Could you construct a modified version of the example that reproduces the issue you are seeing? |
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Hello @embhorn, It appears that SignatureGenerateHash, even with WC_SIGNATURE_TYPE_RSA_W_ENC only pads, but does not perform ASN.1(oid|hash) encoding. When I decrypt the signature with the public key (python Is there a way to enable PKCS1v15 for RSA sign/verify and avoid having to manually do the encoding? I was using a different library that automatically unwrapped the signature during the comparison. Here is my code that, note that the expected signature is what I included in the original issue, which is encoded as well as padded. #include <stdio.h>
#include <stdlib.h>
#include <wolfssl/options.h>
#include <wolfssl/wolfcrypt/signature.h>
#include <wolfssl/wolfcrypt/rsa.h>
const byte private_key_der[] = {
0x30,0x82,0x04,0xbc,0x02,0x01,0x00,0x30,0x0d,0x06,0x09,0x2a,0x86,0x48,0x86,0xf7,
0x0d,0x01,0x01,0x01,0x05,0x00,0x04,0x82,0x04,0xa6,0x30,0x82,0x04,0xa2,0x02,0x01,
0x00,0x02,0x82,0x01,0x01,0x00,0xd0,0x84,0x16,0x1e,0x7f,0x06,0x9f,0xef,0xee,0x25,
0x0a,0x9e,0x9b,0x80,0x79,0xcd,0x8b,0x74,0x71,0x75,0xe5,0x57,0x6a,0xb4,0x83,0xb3,
0x7e,0x01,0xbf,0x1d,0xe2,0x63,0xec,0xf3,0x96,0x28,0x81,0xdd,0xab,0xa4,0xfe,0xb8,
0x61,0x44,0x65,0x83,0x8e,0xb2,0x19,0x47,0xdc,0x6e,0x4d,0xc9,0x96,0x12,0x1d,0x13,
0xd7,0x89,0xec,0x67,0x1a,0x8b,0x03,0x2b,0x9d,0xa9,0x4c,0xec,0x69,0x17,0xf3,0x70,
0x56,0xfa,0xbe,0x22,0x14,0x39,0x50,0xaf,0x93,0xd2,0x26,0xf4,0x78,0x22,0x2f,0x22,
0xab,0xdf,0x6e,0x43,0x7c,0xfe,0xd4,0x5a,0x79,0x36,0xb1,0xfe,0xe4,0xcf,0x60,0x06,
0xb3,0x28,0x2f,0x21,0xaf,0xbb,0xeb,0x95,0xa7,0xcd,0x87,0xa8,0x9d,0x68,0x35,0x8a,
0xd1,0x7f,0x13,0xde,0x4c,0x29,0x2a,0xa2,0x34,0x27,0x14,0xcd,0xb4,0x2e,0x81,0xea,
0xeb,0x32,0x81,0x21,0x67,0x21,0x1b,0xd2,0x02,0x9c,0x21,0x4c,0x9b,0xe2,0x30,0x03,
0x9c,0xf8,0xeb,0x99,0x7f,0x40,0x36,0x74,0xd7,0x42,0x71,0x5a,0x3f,0xd3,0xa2,0x9a,
0x06,0x21,0xbb,0x5e,0x7d,0xd9,0x0c,0x88,0xec,0x80,0x8f,0xe4,0x5e,0x31,0x04,0x10,
0x94,0x0f,0x96,0xc8,0xc7,0x72,0xf4,0xc6,0xcd,0x98,0x8f,0x30,0x1f,0x79,0x2d,0x9b,
0x43,0xaf,0x8c,0xd6,0x55,0xb7,0xd8,0x9a,0xd3,0xa4,0x6c,0x70,0xd8,0xbc,0xc6,0x63,
0x60,0xf4,0xbe,0xb4,0x73,0x56,0x93,0xe9,0x74,0x2f,0xd5,0x36,0x36,0x91,0x70,0x1c,
0xd3,0x8d,0xc5,0x20,0x20,0x51,0xab,0xbb,0x46,0xf4,0xc5,0x3a,0x59,0x77,0x55,0x68,
0x83,0x6c,0xdb,0x4a,0x21,0x47,0x02,0x03,0x01,0x00,0x01,0x02,0x82,0x01,0x00,0x03,
0xe0,0x78,0xd2,0xcf,0x54,0xcd,0xb3,0x75,0xcf,0x8d,0x7f,0x7e,0x6f,0xa8,0x94,0x18,
0x44,0x2d,0x79,0xde,0x2e,0x3e,0x67,0x25,0xcd,0xb8,0x09,0x8b,0x46,0xa0,0x77,0x70,
0x27,0xe5,0x42,0x52,0x8b,0xcf,0x0d,0xad,0xc8,0xba,0xd2,0x3d,0x3a,0xf1,0x73,0xc1,
0x41,0x93,0x49,0x1f,0xbc,0x20,0x44,0xac,0xf2,0xb9,0xfe,0xaf,0xfd,0x08,0xc2,0xcd,
0xe7,0xc9,0x32,0x25,0x22,0x7e,0x1f,0xba,0x60,0x7b,0xd5,0x84,0xa4,0x78,0x90,0xca,
0x3d,0xc1,0x77,0x56,0x4f,0x14,0x4e,0xba,0x66,0xa0,0x20,0x72,0xd9,0xe1,0x60,0x91,
0x8d,0x2f,0x14,0xc3,0xc1,0x73,0xfa,0xa1,0x13,0xee,0xcf,0xcf,0xf4,0x85,0xe2,0x6e,
0x12,0x65,0xc0,0xce,0x05,0x66,0x0b,0xd2,0x77,0x06,0xc7,0x20,0x94,0xf1,0x00,0x88,
0x57,0xb7,0xa9,0xd4,0x1c,0x78,0x0b,0xb4,0xda,0x09,0x27,0xa2,0x77,0x4f,0x7e,0x69,
0xb1,0xd9,0x6c,0xd5,0x70,0x7e,0xd7,0x24,0x5f,0x4e,0x38,0x4f,0xf9,0xc0,0x87,0xc3,
0x31,0x8e,0x8d,0x99,0x2c,0x0c,0xd9,0x4b,0xa5,0x71,0xec,0x9e,0x4f,0x24,0x92,0xf5,
0x7d,0x30,0x27,0x33,0x17,0xb5,0xf1,0xf4,0xd5,0x38,0x3a,0xa0,0x75,0xf9,0x7a,0x9d,
0x0e,0x5c,0x81,0x4e,0x21,0x6d,0xcc,0x55,0xac,0x3d,0x78,0x18,0x6c,0x34,0x42,0x9d,
0x9b,0xd5,0x44,0x3f,0x95,0x5f,0xbd,0xef,0x18,0x0d,0xef,0xca,0xc3,0x9a,0x25,0x82,
0x39,0xc0,0x70,0x33,0x54,0xcd,0xe2,0x70,0x04,0xfc,0x8b,0x24,0x81,0x9c,0xf5,0x9f,
0xd1,0x71,0xe8,0xdc,0x17,0x0a,0x8d,0x2e,0xdf,0xee,0xf7,0x95,0x9e,0x4c,0x35,0x02,
0x81,0x81,0x00,0xdd,0xf4,0x28,0x51,0x05,0x12,0xed,0xa4,0xd6,0x16,0x73,0x3b,0xd9,
0x67,0x44,0x4d,0x26,0x97,0x76,0xb3,0xa7,0x6e,0x45,0x50,0xe0,0x8b,0xe7,0x71,0xe1,
0x89,0x04,0xa9,0xcf,0x6e,0x23,0x78,0x82,0xa6,0xed,0x45,0x9d,0xb0,0xd0,0x0a,0x01,
0xd8,0x15,0x0b,0xc7,0xb0,0x89,0xdc,0xd2,0xb1,0xd5,0x21,0x96,0x4f,0x51,0x66,0x0f,
0xde,0xa1,0x5c,0xd8,0x4e,0x9a,0xdf,0x85,0xb3,0x15,0x6e,0x2e,0xb4,0x4f,0xe1,0x5b,
0x86,0xad,0x79,0x63,0xbe,0x4c,0x80,0xf7,0xd9,0x5a,0x0d,0xdd,0xd2,0x4f,0x14,0xaa,
0x50,0x32,0xd4,0x95,0x9d,0x8b,0x03,0xea,0x57,0xc3,0x2b,0x3c,0x25,0x7f,0x60,0x87,
0x7d,0xfd,0x3f,0xad,0x14,0x06,0x20,0x94,0x07,0x9e,0x92,0xf7,0xf8,0x2b,0x0a,0x80,
0x60,0xed,0x95,0x02,0x81,0x81,0x00,0xf0,0x80,0x3e,0x90,0x76,0x67,0x3a,0xe4,0xa9,
0xe3,0x62,0x49,0xb8,0xdc,0x7e,0xb2,0x83,0x68,0x52,0x68,0xa9,0x7d,0xa2,0xcd,0x90,
0x15,0x27,0xcb,0x47,0x65,0xfc,0x6c,0x3b,0x42,0x6c,0x1d,0x30,0x02,0x35,0x62,0x52,
0x11,0xf4,0x6c,0xc3,0x8d,0xff,0x50,0x24,0xfc,0x2d,0x31,0xb6,0x12,0xb2,0xba,0x98,
0xe4,0x70,0x2e,0x0e,0x82,0x5f,0xf2,0xe9,0xbc,0xad,0x11,0x5a,0x6e,0x3e,0x17,0x4a,
0xd5,0xe7,0xa7,0x8e,0xd8,0x63,0xe5,0x67,0x6d,0x19,0x58,0xd9,0xd4,0xe1,0x0c,0x39,
0x8f,0x7c,0xd8,0x79,0x5d,0x3b,0x8c,0x1a,0xd0,0x8d,0x0e,0x21,0xe9,0xa5,0x3e,0xef,
0x7d,0xc6,0xa6,0xaa,0x32,0xcb,0x4e,0x56,0xab,0x17,0x96,0x1b,0xff,0xdb,0x83,0xbc,
0xb1,0x31,0x4d,0x89,0xae,0x84,0x6b,0x02,0x81,0x80,0x1a,0xde,0xba,0x1a,0xc4,0xe0,
0x7b,0xc0,0x9e,0xe2,0x6c,0xe4,0xeb,0xf6,0xe2,0x7f,0xec,0x92,0x1d,0x9e,0xb6,0x40,
0x55,0x47,0xeb,0x47,0x44,0xa7,0xb6,0xc4,0x1d,0xba,0x69,0x10,0x4e,0x5f,0x02,0x82,
0x2e,0xeb,0x64,0xa1,0xc9,0x2d,0xcc,0xf7,0x59,0xe4,0xe9,0x31,0xe8,0x1e,0xc1,0xab,
0x21,0xc0,0x45,0x30,0x29,0x0c,0x90,0x13,0x45,0xb9,0xb5,0xbe,0x1e,0x65,0xbd,0x0b,
0xe7,0x26,0x45,0xa5,0x32,0x9e,0x77,0xb4,0x20,0x40,0x37,0xe1,0x0b,0xe5,0xf9,0x1b,
0x69,0x19,0x90,0xa7,0x2b,0x47,0xb7,0x2e,0xaa,0x58,0xae,0x1c,0x3a,0x7e,0x28,0xda,
0xa3,0x18,0x12,0xd9,0xff,0x47,0xb2,0x5f,0x80,0x4f,0x3b,0x26,0xd7,0x6f,0x0e,0x3c,
0xb5,0xe7,0xd8,0xf9,0x44,0x4c,0xab,0x2a,0x10,0xd9,0x02,0x81,0x80,0x45,0x6e,0x40,
0xa1,0xa4,0x0d,0x19,0x4b,0x7a,0x60,0x52,0xb7,0xc5,0xce,0xa2,0x25,0x17,0x1a,0xbe,
0xef,0xc8,0x3e,0xa5,0x09,0x83,0x57,0x18,0x2d,0xef,0x66,0xda,0x00,0xc4,0xfa,0xe0,
0x0b,0x6d,0x18,0xb6,0x20,0xb4,0x60,0xca,0x97,0xbb,0xbc,0xfa,0xc0,0x40,0x6d,0x2c,
0xfe,0xf4,0xf9,0x60,0xef,0xcd,0xc3,0xe5,0x3e,0xe6,0xa1,0x6c,0xe1,0xcb,0xe8,0xd4,
0x6d,0xf6,0x15,0x6d,0x87,0x7b,0xeb,0x54,0xfd,0x62,0x97,0xc5,0xff,0x2c,0x64,0xaa,
0xb4,0xa3,0xee,0x79,0x29,0xf6,0x54,0x1e,0x4e,0xc0,0x7a,0xd1,0xfe,0x18,0x9f,0xac,
0x99,0x2f,0xe1,0x2b,0xfb,0x87,0x58,0x60,0x49,0x2d,0x49,0x8c,0xb8,0x08,0xfd,0x4b,
0xc9,0xe2,0x3b,0x73,0x3c,0x0c,0xf5,0x7a,0xae,0x4f,0xd9,0x3a,0x11,0x02,0x81,0x80,
0x4f,0x77,0xc2,0xe3,0x66,0xc2,0x31,0xf8,0x11,0xe4,0xb3,0x36,0x7f,0x02,0xe4,0x87,
0x64,0x6b,0x8b,0xd2,0x8c,0x36,0x4d,0x30,0x96,0x8c,0x24,0x1f,0x7c,0xc9,0x6c,0x87,
0x79,0xde,0x65,0x94,0x85,0x02,0x93,0x59,0xfb,0x67,0x76,0xda,0x60,0xe3,0x35,0xb3,
0x19,0xb6,0x42,0x7b,0x12,0x4a,0xa6,0x82,0xb5,0xa7,0x47,0x84,0x60,0xa2,0x0d,0x28,
0xff,0xaa,0xe1,0x3b,0x0f,0xa1,0xd1,0x2e,0xce,0x96,0xd7,0x94,0xd0,0x7d,0x2a,0x02,
0x58,0x4d,0x70,0xff,0xd4,0xdc,0x86,0x0e,0x02,0xac,0xc5,0xeb,0x7c,0xc1,0xf0,0x80,
0x28,0xdf,0x88,0xb6,0x51,0x75,0xb2,0x4b,0xe0,0x49,0xc2,0x4c,0x76,0x0a,0xf0,0x8e,
0x1b,0x76,0xd2,0x13,0xd0,0xcf,0xb8,0x98,0xad,0xda,0xc4,0x17,0x65,0x77,0xc1,0xca,
};
const byte public_key_der[] = {
0x30,0x82,0x01,0x22,0x30,0x0d,0x06,0x09,0x2a,0x86,0x48,0x86,0xf7,0x0d,0x01,0x01,
0x01,0x05,0x00,0x03,0x82,0x01,0x0f,0x00,0x30,0x82,0x01,0x0a,0x02,0x82,0x01,0x01,
0x00,0xd0,0x84,0x16,0x1e,0x7f,0x06,0x9f,0xef,0xee,0x25,0x0a,0x9e,0x9b,0x80,0x79,
0xcd,0x8b,0x74,0x71,0x75,0xe5,0x57,0x6a,0xb4,0x83,0xb3,0x7e,0x01,0xbf,0x1d,0xe2,
0x63,0xec,0xf3,0x96,0x28,0x81,0xdd,0xab,0xa4,0xfe,0xb8,0x61,0x44,0x65,0x83,0x8e,
0xb2,0x19,0x47,0xdc,0x6e,0x4d,0xc9,0x96,0x12,0x1d,0x13,0xd7,0x89,0xec,0x67,0x1a,
0x8b,0x03,0x2b,0x9d,0xa9,0x4c,0xec,0x69,0x17,0xf3,0x70,0x56,0xfa,0xbe,0x22,0x14,
0x39,0x50,0xaf,0x93,0xd2,0x26,0xf4,0x78,0x22,0x2f,0x22,0xab,0xdf,0x6e,0x43,0x7c,
0xfe,0xd4,0x5a,0x79,0x36,0xb1,0xfe,0xe4,0xcf,0x60,0x06,0xb3,0x28,0x2f,0x21,0xaf,
0xbb,0xeb,0x95,0xa7,0xcd,0x87,0xa8,0x9d,0x68,0x35,0x8a,0xd1,0x7f,0x13,0xde,0x4c,
0x29,0x2a,0xa2,0x34,0x27,0x14,0xcd,0xb4,0x2e,0x81,0xea,0xeb,0x32,0x81,0x21,0x67,
0x21,0x1b,0xd2,0x02,0x9c,0x21,0x4c,0x9b,0xe2,0x30,0x03,0x9c,0xf8,0xeb,0x99,0x7f,
0x40,0x36,0x74,0xd7,0x42,0x71,0x5a,0x3f,0xd3,0xa2,0x9a,0x06,0x21,0xbb,0x5e,0x7d,
0xd9,0x0c,0x88,0xec,0x80,0x8f,0xe4,0x5e,0x31,0x04,0x10,0x94,0x0f,0x96,0xc8,0xc7,
0x72,0xf4,0xc6,0xcd,0x98,0x8f,0x30,0x1f,0x79,0x2d,0x9b,0x43,0xaf,0x8c,0xd6,0x55,
0xb7,0xd8,0x9a,0xd3,0xa4,0x6c,0x70,0xd8,0xbc,0xc6,0x63,0x60,0xf4,0xbe,0xb4,0x73,
0x56,0x93,0xe9,0x74,0x2f,0xd5,0x36,0x36,0x91,0x70,0x1c,0xd3,0x8d,0xc5,0x20,0x20,
0x51,0xab,0xbb,0x46,0xf4,0xc5,0x3a,0x59,0x77,0x55,0x68,0x83,0x6c,0xdb,0x4a,0x21,
0x47,0x02,0x03,0x01,0x00,0x01,
};
byte hashed_message[] = {
0xb7,0x03,0xb9,0xc0,0x84,0xbe,0xe8,0xa2,0x78,0xa9,0x56,0x53,0x48,0x44,0xd7,0xfa,
0x40,0x10,0xa5,0x86,0x8c,0x0c,0x82,0xa4,0x50,0x6b,0xf8,0x1c,0x36,0x21,0x8d,0xe1,
};
byte expected_signed_results[] = {
0x07,0x07,0x82,0x11,0xc7,0x2d,0xc4,0x84,0x1d,0x32,0xc5,0x78,0x83,0xdc,0x50,0x02,
0x97,0xf7,0x58,0xa5,0xde,0x02,0x03,0x5f,0xb8,0xba,0x35,0x4d,0xa1,0xb5,0xce,0xa3,
0x82,0x15,0xb2,0x2c,0xd6,0x12,0x32,0x43,0x27,0xec,0x86,0x25,0x7c,0xc3,0x0d,0x04,
0x8c,0xb2,0x0c,0x13,0x64,0x5d,0x11,0x64,0x36,0x6a,0x62,0x0a,0x88,0xe7,0x9f,0x98,
0x3a,0x56,0x3d,0x79,0xba,0x4a,0x69,0xe0,0x35,0xf4,0xc9,0x01,0xff,0xec,0xd3,0x5b,
0x8e,0x83,0x0d,0x7b,0x13,0x9e,0x56,0xd4,0xbc,0x0c,0xee,0x55,0x94,0x42,0xae,0xda,
0xf6,0x4a,0xd4,0xa6,0x0c,0xd2,0x0b,0x0c,0x69,0xb9,0x7a,0x2a,0x7d,0x02,0x86,0x77,
0x3b,0xa4,0x4d,0x2b,0x74,0x5a,0xb8,0x44,0x7d,0x20,0x6b,0x07,0x56,0x54,0x73,0x13,
0xd8,0xa1,0xa6,0x9a,0x5f,0x1d,0x81,0x9f,0x69,0xe0,0x49,0x1b,0x03,0x4d,0x72,0x31,
0xab,0x04,0x5b,0x70,0xb5,0xdf,0x3e,0x80,0x46,0x56,0x39,0xf1,0xd3,0x44,0xca,0xae,
0xa5,0x3d,0x10,0x71,0x7f,0x58,0xb7,0xaa,0x58,0x3c,0xc1,0x43,0x0a,0xa6,0x28,0xc1,
0x18,0xee,0x87,0xdf,0xa9,0x42,0xa1,0x1b,0x60,0xa6,0x45,0x23,0x4a,0x47,0xc6,0xdf,
0x4a,0x48,0x7f,0xce,0x99,0xb7,0xf7,0x44,0x64,0x29,0xc7,0xa7,0xe0,0x4d,0x36,0x46,
0xa8,0x62,0xe1,0x92,0xee,0x68,0x56,0x5a,0xf0,0xb3,0xd0,0x47,0x10,0x1b,0x32,0x7c,
0x4f,0x02,0x27,0x9c,0x4a,0x8b,0x86,0x82,0xb8,0x88,0x4a,0xc5,0xed,0xff,0x3d,0x4b,
0x40,0xda,0xe0,0xe4,0xd3,0xf8,0xf5,0xfe,0x05,0xfe,0xd1,0x7f,0x7d,0xee,0xea,0xef,
};
static void print_buf(char *str, byte *buf, int blen)
{
int i, j;
printf("%s\n", str);
for (i = 0, j = 0; i < blen; i )
{
printf("x ", *buf );
if ( j == 16)
{
j = 0;
printf("\n");
}
}
printf("\n");
}
int main(int argc, char** argv)
{
int ret = 0;
WC_RNG rng;
RsaKey private_key;
RsaKey public_key;
word32 inout;
byte signature[1024];
word32 signature_length = 1024;
wc_InitRng(&rng);
wc_InitRsaKey(&private_key, NULL);
wc_InitRsaKey(&public_key, NULL);
inout = 0;
ret = wc_RsaPrivateKeyDecode(
private_key_der,
&inout,
&private_key,
sizeof(private_key_der)
);
printf("wc_RsaPrivateKeyDecode: %d\n", ret);
inout = 0;
ret = wc_RsaPublicKeyDecode(
public_key_der,
&inout,
&public_key,
sizeof(public_key_der)
);
printf("wc_RsaPublicKeyDecode: %d\n", ret);
ret = wc_SignatureGenerateHash(
WC_HASH_TYPE_SHA256,
WC_SIGNATURE_TYPE_RSA_W_ENC,
hashed_message,
sizeof(hashed_message),
signature,
&signature_length,
&private_key,
sizeof(private_key),
&rng);
printf("wc_SignatureGenerateHash: %d\n", ret);
print_buf("generated :", signature, signature_length);
print_buf("expected :", expected_signed_results, sizeof(expected_signed_results));
ret = wc_SignatureVerifyHash(
WC_HASH_TYPE_SHA256,
WC_SIGNATURE_TYPE_RSA_W_ENC,
hashed_message,
sizeof(hashed_message),
signature,
signature_length,
&public_key,
sizeof(public_key)
);
printf("wc_SignatureVerifyHash: %d\n", ret);
wc_FreeRsaKey(&private_key);
wc_FreeRsaKey(&public_key);
wc_FreeRng(&rng);
return 0;
} |
|
Thanks @petertorelli , we can reproduce. @philljj is going to debug and fix. |
|
Hi @petertorelli, I apologize for the slow reply. The issue I think is this: in the So if I modified your example by adding the call to Output: I agree the behavior of Thanks, |
|
Thanks @philljj, I had actually implemented that in the referring issue, except I used I'll close it. What I implemented as a workaround, but apparently this isn't a workaround but the actual mode of operation: ee_status_t
th_rsa_verify(void *p_context,
uint8_t *p_hash,
uint32_t hashlen,
uint8_t *p_sig,
uint32_t siglen,
bool *p_pass)
{
rsa_context_t *ctx = (rsa_context_t *)p_context;
int ret = 0;
uint8_t encoded_hash[100]; /* should be around 50 bytes */
uint32_t encoded_size;
*p_pass = false;
/* Add ASN digest info header */
ret = wc_EncodeSignature(
encoded_hash,
p_hash,
hashlen,
SHA256h
);
if (ret < 0)
{
th_printf("e-[wc_EncodeSignature: %d]\r\n", ret);
return EE_STATUS_ERROR;
}
encoded_size = (uint32_t)ret;
ret = wc_SignatureVerifyHash(WC_HASH_TYPE_SHA256,
WC_SIGNATURE_TYPE_RSA_W_ENC,
encoded_hash,
encoded_size,
p_sig,
siglen,
ctx->pubkey,
sizeof(RsaKey));
if (ret != 0 && ret != SIG_VERIFY_E)
{
th_printf("e-[wc_SignatureVerifyHash: %d]\r\n", ret);
return EE_STATUS_ERROR;
}
if (ret == 0)
{
*p_pass = true;
}
return EE_STATUS_OK;
} |
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Version
5.5.4
Description
I'm was using wc_SignatureVerify, and it worked fine, so I switched to wc_SignatureVerifyHash, but now it is failing. I've included debug info further down.
Here is the code call, the Rng and Key are already properly loaded (I know this because the wc_SignatureVerify() is working):
p_hash =
b703b9c084bee8a278a956534844d7fa4010a5868c0c82a4506bf81c36218de1
p_pub (ASN.1) =
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
p_pub parsed from ASN.1 above =
D084161E7F069FEFEE250A9E9B8079CD8B747175E5576AB483B37E01BF1DE263ECF3962881DDABA4FEB8614465838EB21947DC6E4DC996121D13D789EC671A8B032B9DA94CEC6917F37056FABE22143950AF93D226F478222F22ABDF6E437CFED45A7936B1FEE4CF6006B3282F21AFBBEB95A7CD87A89D68358AD17F13DE4C292AA2342714CDB42E81EAEB32812167211BD2029C214C9BE230039CF8EB997F403674D742715A3FD3A29A0621BB5E7DD90C88EC808FE45E310410940F96C8C772F4C6CD988F301F792D9B43AF8CD655B7D89AD3A46C70D8BCC66360F4BEB4735693E9742FD5363691701CD38DC5202051ABBB46F4C53A59775568836CDB4A2147
p_sig =
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
If I decrypt the SIG I get this:
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
We can see the hash in ASN.1 of OID|hash. Why is VerifyHash failing with SIG_VERIFY_E? I'm using WC_SIGNATURE_TYPE_RSA_W_ENC which should decode ASN.1, correct?
Thanks,
Peter
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